US3595042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking mechanism
Assignee: H O BOEHME Inc
•
Filing: 1969-08-25
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Granted: 1971-07-27
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Expires: 1989-08-25
Abstract
Abstract An improved, programmable locking mechanism, particularly useful for controlling access to restricted areas, such as parking lots, convention centers, private clubs, and the like. The access control unit is adapted to be operated by a properly coded pass card provided with a plurality of magnetized areas or portions (commonly referred to as magnetic ''''spots'''') arranged in a predetermined pattern. The unit includes electromagnetic means for selectively nullifying or changing the polarity of the magnetic spots to validate or invalidate the pass card. The unit further comprises a locking pin core adapted to be moved by a properly coded pass card to a forward position wherein it will actuate a suitable switch to operate a barrier (e.g., parking lot gate, door, turnstile, etc.) or an indicator. The core is slidable between a fixed upper plate and a fixed lower plate, and is provided with a plurality of locking pin channels extending vertically through the thickness thereof. The lower plate functions as a locking plate. It is provided with a plurality of wells or recesses which are in substantial alignment with the locking pin channels in the core when the core is in its rearward (locked) position. A plurality of magnetic locking pins are slideably mounted in the core channels and normally extend into the locking plate wells to normally inhibit relative movement between the core and locking plate. A program card receiving slot or pocket is provided adjacent the upper surface of the core, between the fixed upper plate and a top plate, for receiving a program card; and a pass card receiving slot is provided adjacent the lower surface of the core between the locking plate and a bottom plate, for receiving a properly coded pass card. The program card has magnetized portions or ''''spots'''' arranged therein in a predetermined pattern designed to attract selected locking pins out of their respective recesses in the locking plate, and the magnetized spots in a properly coded pass card are arranged in a pattern to repel the remaining locking pins out of the locking plate recesses to free the core for forward movement. The unit is operated by inserting a properly coded pass card into its slot and against a flange on the core to urge the core to its forward position and actuate a switch which will operate the barrier or indicator. The access control unit is further provided with one or more electromagnets located beneath the pass card receiving slot for nullifying or reversing the polarity of one or more of the magnetic spots in the pass card, thereby changing the magnetic coding on the card. This prevents the card from being reused to operate the same unit a second time since not all of the locking pins will be repelled out of their locking plate wells by the altered coding of magnetic spots on the card. The pass card may be ''''revalidated'''' (recoded to restore the original magnetic code on the card) by inserting the card into another access control unit. This second unit is programmed to receive the altered pass card and nullify or reverse the polarities of some of the magnetic spots therein to restore the original magnetic code on the card. The second unit may, for example, be located at the exit from the restricted area and programmed to be operated by the altered pass card to actuate a barrier control switch.
Inventors
- 👤 Bruce S Sedley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:36
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/20; G07C9/215; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7057; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/752; Y10T70/7531
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
162 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion therein, said improved unit comprising: a magnetic locking element slideably disposed for movement between a locking position and a unlocking position; means normally biasing said Magnetic locking element into its locking position; means defining a key member receiving opening in said unit for receiving a key member having at least one magnetized portion therein, for urging said locking element to its unlocking position; electromagnetic means having opposite poles spaced from one another and positioned on opposite sides of said key member receiving opening and in substantial alignment with one another; said electromagnetic means being operative, when energized, to alter the polarity of the magnetized portion in a key member inserted in the key member receiving opening; and control switch means operative in response to a properly magnetically coded key member being inserted into the key member receiving opening for energizing said electromagnetic means.
Claim 2
Dependent Claim
162 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion therein, said improved unit comprising: a magnetic locking element slideably disposed for movement between a locking position and a unlocking position; means normally biasing said Magnetic locking element into its locking position; means defining a key member receiving opening in said unit for receiving a key member having at least one magnetized portion therein, for urging said locking element to its unlocking position; electromagnetic means having opposite poles spaced from one another and positioned on opposite sides of said key member receiving opening and in substantial alignment with one another; said electromagnetic means being operative, when energized, to alter the polarity of the magnetized portion in a key member inserted in the key member receiving opening; and control switch means operative in response to a properly magnetically coded key member being inserted into the key member receiving opening for energizing said electromagnetic means.
Claim 3
Dependent Claim
191 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion therein, said improved unit comprising: a plurality of magnetic locking pins slideably disposed for movement between locking positions and unlocking positions; means normally biasing said magnetic locking elements into their locking positions; means defining a program member receiving opening in said unit for receiving a program member having at least one magnetized portion therein for urging at least one of said magnetic locking elements to its unlocking position; means defining a key member receiving opening in said unit for receiving a key member having at least one magnetized portion thereon for urging another of said magnetic locking elements to its unlocking position; electromagnetic means mounted in close proximity to said key member receiving opening; said electromagnetic means being operative, when energized, to alter the polarity of the magnetized portion in the key member when the key member is inserted into the key member receiving opening; and control switch means operative in response to insertion of a properly magnetically coded key member in said key member receiving opening to energize said electromagnetic means.
Claim 4
Dependent Claim
191 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion therein, said improved unit comprising: a plurality of magnetic locking pins slideably disposed for movement between locking positions and unlocking positions; means normally biasing said magnetic locking elements into their locking positions; means defining a program member receiving opening in said unit for receiving a program member having at least one magnetized portion therein for urging at least one of said magnetic locking elements to its unlocking position; means defining a key member receiving opening in said unit for receiving a key member having at least one magnetized portion thereon for urging another of said magnetic locking elements to its unlocking position; electromagnetic means mounted in close proximity to said key member receiving opening; said electromagnetic means being operative, when energized, to alter the polarity of the magnetized portion in the key member when the key member is inserted into the key member receiving opening; and control switch means operative in response to insertion of a properly magnetically coded key member in said key member receiving opening to energize said electromagnetic means.
Claim 5
Dependent Claim
195 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion therein, said improved unit comprising: a core member having a longitudinal centerline; means defining a pair of channels extending through one surface of said core member; said core member channels being located on opposite sides of said longitudinal centerline of said core member, equally spaced therefrom, and in substantial alignment with one another; a magnetic locking element slideably disposed in at least one of said core member channels for movement between a locking position and an unlocking position; means normally biasing said magnetic locking pin into its locking position; means defining a key member receiving opening in close proximity to said core member for receiving a key member having at least two magnetized portions therein, at least one of which is adapted to urge said magnetic locking element into its unlocking position; and electromagnetic means mounted in said unit and positioned to be in substantial alignment with each of the two magnetized portions in a properly magnetically coded key member when the key member is inserted in the key member receiving opening to operate the unit.
Claim 6
Dependent Claim
195 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion therein, said improved unit comprising: a core member having a longitudinal centerline; means defining a pair of channels extending through one surface of said core member; said core member channels being located on opposite sides of said longitudinal centerline of said core member, equally spaced therefrom, and in substantial alignment with one another; a magnetic locking element slideably disposed in at least one of said core member channels for movement between a locking position and an unlocking position; means normally biasing said magnetic locking pin into its locking position; means defining a key member receiving opening in close proximity to said core member for receiving a key member having at least two magnetized portions therein, at least one of which is adapted to urge said magnetic locking element into its unlocking position; and electromagnetic means mounted in said unit and positioned to be in substantial alignment with each of the two magnetized portions in a properly magnetically coded key member when the key member is inserted in the key member receiving opening to operate the unit.
Claim 7
Dependent Claim
75 words
An improved access control unit according to claim 3, wherein said core member includes means defining at least one additional channel extending through one surface thereof, and an additional magnetic locking element is slideably disposed in said additional channel; and further comprising means defining a program member receiving opening in said unit for receiving a program member having at least one magnetized portion, thereon adapted to urge said additional locking element to its unlocking position.
Claim 8
Dependent Claim
246 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion therein; said improved unit comprisiNg: a core member having a channel extending through one surface thereof; a magnetic locking element slideably disposed in said core channel; a locking member disposed in juxtaposition to said core member; means defining a locking recess in said locking member; said locking recess facing said core channel and being in substantial alignment therewith for normally receiving one end of said locking element to prevent substantial relative movement between said core member and said locking member; means defining a key member receiving opening in close proximity to said core member and said locking member for receiving a key member having at least one magnetized portion therein adapted to urge said locking pin out of said locking recess and cause substantial relative movement between said core member and said locking member; electromagnetic means having opposite poles spaced from one another and positioned on opposite sides of said key member receiving opening in substantial alignment with one another; said electromagnetic means being operative, when energized, to alter the polarities of the magnetized portion of the key member when the key member is inserted into said key member receiving opening to create substantial relative movement between said core member and said locking member; and control switch means operative in response to substantial relative movement between said core and said locking member for energizing said electromagnetic means.
Claim 9
Dependent Claim
246 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion therein; said improved unit comprisiNg: a core member having a channel extending through one surface thereof; a magnetic locking element slideably disposed in said core channel; a locking member disposed in juxtaposition to said core member; means defining a locking recess in said locking member; said locking recess facing said core channel and being in substantial alignment therewith for normally receiving one end of said locking element to prevent substantial relative movement between said core member and said locking member; means defining a key member receiving opening in close proximity to said core member and said locking member for receiving a key member having at least one magnetized portion therein adapted to urge said locking pin out of said locking recess and cause substantial relative movement between said core member and said locking member; electromagnetic means having opposite poles spaced from one another and positioned on opposite sides of said key member receiving opening in substantial alignment with one another; said electromagnetic means being operative, when energized, to alter the polarities of the magnetized portion of the key member when the key member is inserted into said key member receiving opening to create substantial relative movement between said core member and said locking member; and control switch means operative in response to substantial relative movement between said core and said locking member for energizing said electromagnetic means.
Claim 10
Dependent Claim
273 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion therein, said improved unit comprising: a core having a plurality of channels extending through one surface thereof; magnetic locking elements slideably disposed in said core channels; a locking member disposed in juxtaposition to said core; means defining a plurality of locking recesses in said locking member; each of said locking recesses facing one of said core channels and being in substantial alignment therewith for normally receiving one end of the locking element therein to prevent substantial relative movement between said core and said locking member; means defining a key member receiving opening in close proximity to said core and said locking member for receiving a key member having at least one magnetized portion therein adapted to urge one of said locking pins out of its respective locking recess and cause substantial relative movement between said core and said locking member; means defining a program member receiving opening in close proximity to said core and said locking member for receiving a program member having at least one magnetized portion therein adapted to urge one of said locking pins out of its respective locking recess; electromagnetic means mounted in close proximity to said key member receiving opening; said electromagnetic means being operative, when energized, to alter the polarity of the magnetized portion in the key member when the key member is inserted into the key member receiving opening to create substantial relative movement between said core and said locking member; and control switch means operative in response to substantial relative movement between said core and means.
Claim 11
Dependent Claim
273 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion therein, said improved unit comprising: a core having a plurality of channels extending through one surface thereof; magnetic locking elements slideably disposed in said core channels; a locking member disposed in juxtaposition to said core; means defining a plurality of locking recesses in said locking member; each of said locking recesses facing one of said core channels and being in substantial alignment therewith for normally receiving one end of the locking element therein to prevent substantial relative movement between said core and said locking member; means defining a key member receiving opening in close proximity to said core and said locking member for receiving a key member having at least one magnetized portion therein adapted to urge one of said locking pins out of its respective locking recess and cause substantial relative movement between said core and said locking member; means defining a program member receiving opening in close proximity to said core and said locking member for receiving a program member having at least one magnetized portion therein adapted to urge one of said locking pins out of its respective locking recess; electromagnetic means mounted in close proximity to said key member receiving opening; said electromagnetic means being operative, when energized, to alter the polarity of the magnetized portion in the key member when the key member is inserted into the key member receiving opening to create substantial relative movement between said core and said locking member; and control switch means operative in response to substantial relative movement between said core and means.
Claim 12
Dependent Claim
84 words
An improved access control unit according to claim 6, wherein said electromagnetic means comprises an electromagnet having opposite poles spaced from one another and positioned on opposite sides of said key member receiving opening in substantial alignment with one another, said poles of said electromagnet being positioned to be in substantial alignment with the magnetized portion in the key member when the key member is inserted into the key member receiving opening to create substantial relative movement between said core and said locking member.
Claim 13
Dependent Claim
18 words
An improved access control unit according to claim 6, wherein each of said magnetic locking elements is polarized.
Claim 14
Dependent Claim
32 words
An improved access control unit according to claim 8, wherein at least one of said magnetic locking elements is polarized to be opposite in polarity to another of said magnetic locking pins.
Claim 15
Dependent Claim
218 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion thereon; said improved unit comprising: a core having a channel extending through one surface thereof; a magnetic locking element slideably disposed in said core channel; a locking member disposed in juxtaposition to said core; means defining a locking recess in said locking member; said locking recess facing said core channel and being in substantial alignment therewith for normally receiving one end of said locking element to prevent substantial relative movement between said core and said locking member; said locking recess being wider than said locking element to permit limited relative movement between said core and said locking member when said locking pin is extending into said locking recess; means defining a key member receiving opening in close proximity to said core and said locking member for receiving a key member having at least one magnetized portion therein for urging said locking element out of said locking recess and causing substantial relative movement between said core and said locking member; control switch means operative in response to substantial relative movement between said core and said locking member; and warning switch means operative in response to limited relative movement between said core and said locking member for actuating a warning signal.
Claim 16
Dependent Claim
218 words
An improved access control unit adapted to be operated by a key member having at least one magnetized portion thereon; said improved unit comprising: a core having a channel extending through one surface thereof; a magnetic locking element slideably disposed in said core channel; a locking member disposed in juxtaposition to said core; means defining a locking recess in said locking member; said locking recess facing said core channel and being in substantial alignment therewith for normally receiving one end of said locking element to prevent substantial relative movement between said core and said locking member; said locking recess being wider than said locking element to permit limited relative movement between said core and said locking member when said locking pin is extending into said locking recess; means defining a key member receiving opening in close proximity to said core and said locking member for receiving a key member having at least one magnetized portion therein for urging said locking element out of said locking recess and causing substantial relative movement between said core and said locking member; control switch means operative in response to substantial relative movement between said core and said locking member; and warning switch means operative in response to limited relative movement between said core and said locking member for actuating a warning signal.
Claim 17
Dependent Claim
250 words
An improved access control unit adapted to be operated by a pass card having at least one magnetized portion therein; said improved unit comprising: a generally planer core member having a channel extending through one surface thereof; a magnetic locking element slideably disposed in said channel; a generally planer locking plate disposed adjacent to said core member; means defining a locking recess in said locking plate; said locking recess facing said core channel and being in substantial alignment therewith for normally receiving one end of said magnetic locking element to prevent substantial relative movement between said core member and said locking plate; means defining a pass card receiving slot in close proximity to said core member for receiving a pass card having at least one magnetized portion therein adapted to urge said locking pin out of said locking plate recess and permit substantial relative movement between said core and said locking member; electromagnetic means having opposite poles spaced from one another and positioned on opposite sides of said pass card receiving slot; said opposite poles being in substantial alignment with one another; said electromagnetic means being operative, when energized, to alter the polarities of the magnetized portion in the pass card when the pass card is inserted into said pass card receiving slot to create substantial relative movement between said core member and said locking plate; and control switch means operative in response to substantial relative movement between said core member and said locking plate for energizing said electromagnetic means.
Claim 18
Dependent Claim
250 words
An improved access control unit adapted to be operated by a pass card having at least one magnetized portion therein; said improved unit comprising: a generally planer core member having a channel extending through one surface thereof; a magnetic locking element slideably disposed in said channel; a generally planer locking plate disposed adjacent to said core member; means defining a locking recess in said locking plate; said locking recess facing said core channel and being in substantial alignment therewith for normally receiving one end of said magnetic locking element to prevent substantial relative movement between said core member and said locking plate; means defining a pass card receiving slot in close proximity to said core member for receiving a pass card having at least one magnetized portion therein adapted to urge said locking pin out of said locking plate recess and permit substantial relative movement between said core and said locking member; electromagnetic means having opposite poles spaced from one another and positioned on opposite sides of said pass card receiving slot; said opposite poles being in substantial alignment with one another; said electromagnetic means being operative, when energized, to alter the polarities of the magnetized portion in the pass card when the pass card is inserted into said pass card receiving slot to create substantial relative movement between said core member and said locking plate; and control switch means operative in response to substantial relative movement between said core member and said locking plate for energizing said electromagnetic means.
Claim 19
Dependent Claim
290 words
An improved, programmable access control unit adapted to be operated by a pass card having at least one magnetized portion therein; said improved unit comprising: a generally planer core member having a plurality of channels extending through one surface thereof; magnetic locking pins slideably disposed in said core channels; a generally planer locking plate disposed adjacent to said core; means defining locking recesses in said locking plate; each of said locking recesses facing one of said core member channels and being in substantial alignment therewith for normally receiving one end of the locking pin therein to prevent substantial relative movement between said core member and said locking platE; means defining a pass card receiving slot in close proximity to one surface of said core member for receiving a pass card having at least one magnetized portion therein adapted to urge at least one of said locking pins out of its respective locking recess and permit substantial relative movement between said core member and said locking plate; means defining a program card receiving slot in close proximity to the other surface of said core for receiving a program card having at least one magnetized portion therein adapted to urge at least one of said locking pins out of its respective locking recess; electromagnetic means mounted in close proximity to said pass card receiving slot; said electromagnetic means being operative, when energized, to alter the polarity of the magnetized portion in the pass card when the pass card is inserted into the pass card receiving slot to create substantial relative movement between said core member and said locking plate; and control switch means operative in response to substantial movement between said core member and said locking plate for energizing said electromagnetic means.
Claim 20
Dependent Claim
290 words
An improved, programmable access control unit adapted to be operated by a pass card having at least one magnetized portion therein; said improved unit comprising: a generally planer core member having a plurality of channels extending through one surface thereof; magnetic locking pins slideably disposed in said core channels; a generally planer locking plate disposed adjacent to said core; means defining locking recesses in said locking plate; each of said locking recesses facing one of said core member channels and being in substantial alignment therewith for normally receiving one end of the locking pin therein to prevent substantial relative movement between said core member and said locking platE; means defining a pass card receiving slot in close proximity to one surface of said core member for receiving a pass card having at least one magnetized portion therein adapted to urge at least one of said locking pins out of its respective locking recess and permit substantial relative movement between said core member and said locking plate; means defining a program card receiving slot in close proximity to the other surface of said core for receiving a program card having at least one magnetized portion therein adapted to urge at least one of said locking pins out of its respective locking recess; electromagnetic means mounted in close proximity to said pass card receiving slot; said electromagnetic means being operative, when energized, to alter the polarity of the magnetized portion in the pass card when the pass card is inserted into the pass card receiving slot to create substantial relative movement between said core member and said locking plate; and control switch means operative in response to substantial movement between said core member and said locking plate for energizing said electromagnetic means.
Claim 21
Dependent Claim
88 words
An improved access control unit according to claim 12, wherein said electromagnetic means comprises an electromagnet having opposite poles spaced from one another and positioned on opposite sides of the pass card receiving slot; said opposite poles of said electromagnet being in substantial alignment with one another, and being adapted to be in substantial alignment with a magnetized portion on the pass card when the pass card is inserted into the pass card receiving slot to create substantial relative movement between said core member and said locking plate.
Claim 22
Dependent Claim
277 words
An improved access control unit adapted to be operated by a pass card having magnetized portions therein; said improved unit comprising: a generally planer core member having a longitudinal centerline; means defining a pair of channels extending through at least one surface of said core member; said channels being located on either side of said centerline of said core member in substantial alignment with one another and equally spaced from said longitudinal centerline; a magnetic locking element slideably disposed in at least one of said core member channels; a generally planer locking plate disposed adjacent to said core member; means defining at least one locking recess in said locking plate; said locking recess being in substantial alignment with said core member channel having said one magnetic locking element slideably disposed therein; means defining a pass card receiving slot in close proximity to said core member and said locking plate for receiving a pass card having magnetized portions therein, at least one of which is adapted to urge said one magnetic locking element out of its respective locking plate recess when the pass card is inserted into the pass card receiving slot; electromagnetic means mounted in said unit and positioned to be in substantial alignment with magnetized portions in a pass card when the pass card is inserted into said pass card receiving slot to create substantial relative movement between said core member and said locking plate; control switch means operative in response to substantial relative movement between said core member and said locking plate for energizing said electromagnetic means to alter the polarities of the magnetic portions on the pass card which are in substantial alignment therewith.
Claim 23
Dependent Claim
277 words
An improved access control unit adapted to be operated by a pass card having magnetized portions therein; said improved unit comprising: a generally planer core member having a longitudinal centerline; means defining a pair of channels extending through at least one surface of said core member; said channels being located on either side of said centerline of said core member in substantial alignment with one another and equally spaced from said longitudinal centerline; a magnetic locking element slideably disposed in at least one of said core member channels; a generally planer locking plate disposed adjacent to said core member; means defining at least one locking recess in said locking plate; said locking recess being in substantial alignment with said core member channel having said one magnetic locking element slideably disposed therein; means defining a pass card receiving slot in close proximity to said core member and said locking plate for receiving a pass card having magnetized portions therein, at least one of which is adapted to urge said one magnetic locking element out of its respective locking plate recess when the pass card is inserted into the pass card receiving slot; electromagnetic means mounted in said unit and positioned to be in substantial alignment with magnetized portions in a pass card when the pass card is inserted into said pass card receiving slot to create substantial relative movement between said core member and said locking plate; control switch means operative in response to substantial relative movement between said core member and said locking plate for energizing said electromagnetic means to alter the polarities of the magnetic portions on the pass card which are in substantial alignment therewith.
Claim 24
Dependent Claim
100 words
An improved access control unit according to claim 14, wherein said core member further includes at least one additional channel extending through one surface thereof, and further including a magnetic locking element disposed in said additional channel, and wherein said locking plate includes a locking recess in substantial alignment with said additional channel; and further comprising means defining a program card receiving slot in close proximity to said core member and Said locking plate for receiving a program card having at least one magnetized portion therein for urging said additional magnetic locking element out of its respective locking plate recess.
Claim 25
Dependent Claim
381 words
An improved access control unit adapted to be operated by a properly magnetically coded pass card; said improved unit comprising: a generally planer core member having a longitudinal centerline; said core member including a forward portion having a plurality of channels extending vertically through the thickness thereof, and a rear portion having at least two channels extending vertically through the thickness thereof; generally elongated, polarized, magnetic locking pins disposed in said channels in said forward portion of said core member and in at least one of said channels in said rear portion of said core member; a generally planer locking plate disposed adjacent to and beneath said core member; means defining a plurality of locking recesses in said locking plate; each of said locking recesses facing one of said channels in said core member and being in substantial alignment therewith for normally receiving one end of the magnetic locking pin disposed in that channel to prevent substantial relative movement between said core member and said locking plate; flange means carried by said core member and adapted to be contacted by a pass card to move said core member forwardly relative to said locking plate; means defining a pass card receiving slot beneath said locking plate for receiving a pass card having a plurality of magnetized portions therein arranged in a predetermined pattern for urging at least some of the polarized, magnetic locking pins out of their respective recesses in said locking plate, and for contacting said flange member on said core member to move said core member forwardly relative to said locking plate; at least two electromagnets mounted in said unit, each electromagnet including a lower pole disposed beneath said pass card receiving slot and an upper pole disposed above said pass card receiving slot; said lower and upper poles of each electromagnet being in substantial alignment with one another and being positioned to be in substantial alignment with one of said channels in the rear portion of said core member when said core member has been moved forwardly by a properly coded pass card inserted into said pass card receiving slot; and control switch means operatively associated with said core member for energizing said electromagnets when said core member is moved a substantial distance forwardly relative to said locking plate.
Claim 26
Dependent Claim
381 words
An improved access control unit adapted to be operated by a properly magnetically coded pass card; said improved unit comprising: a generally planer core member having a longitudinal centerline; said core member including a forward portion having a plurality of channels extending vertically through the thickness thereof, and a rear portion having at least two channels extending vertically through the thickness thereof; generally elongated, polarized, magnetic locking pins disposed in said channels in said forward portion of said core member and in at least one of said channels in said rear portion of said core member; a generally planer locking plate disposed adjacent to and beneath said core member; means defining a plurality of locking recesses in said locking plate; each of said locking recesses facing one of said channels in said core member and being in substantial alignment therewith for normally receiving one end of the magnetic locking pin disposed in that channel to prevent substantial relative movement between said core member and said locking plate; flange means carried by said core member and adapted to be contacted by a pass card to move said core member forwardly relative to said locking plate; means defining a pass card receiving slot beneath said locking plate for receiving a pass card having a plurality of magnetized portions therein arranged in a predetermined pattern for urging at least some of the polarized, magnetic locking pins out of their respective recesses in said locking plate, and for contacting said flange member on said core member to move said core member forwardly relative to said locking plate; at least two electromagnets mounted in said unit, each electromagnet including a lower pole disposed beneath said pass card receiving slot and an upper pole disposed above said pass card receiving slot; said lower and upper poles of each electromagnet being in substantial alignment with one another and being positioned to be in substantial alignment with one of said channels in the rear portion of said core member when said core member has been moved forwardly by a properly coded pass card inserted into said pass card receiving slot; and control switch means operatively associated with said core member for energizing said electromagnets when said core member is moved a substantial distance forwardly relative to said locking plate.
Claim 27
Dependent Claim
67 words
An improved access control unit according to claim 16 and further comprising means defining a program card receiving slot above said core member for receiving a program card having a plurality of magnetized portions therein for urging at least some of the polarized magnetic locking pins in the channels in the forward portion of said core member out of their respective locking recesses in said locking plate.
Claim 28
Dependent Claim
70 words
An improved access control unit according to claim 17, and further comprising means for limiting the extent to which a program card can be inserted into said program card receiving slot, to thereby prevent a program card from being inserted in said program card receiving slot to such an extent that the program card would overlie and affect the magnetized locking pins in the rear channels in the core member.
Claim 29
Dependent Claim
76 words
An improved access control unit according to claim 16, wherein said recesses in said locking plate are wider than said locking pins to permit limited relative movement between said core and said locking member when said locking pins are extending into their respective locking recesses in said locking plate; and further comprising warning switch means operative in response to limited forward movement of said core member relative to said locking plate for actuating a warning signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |