Patent US4251033A successfully refreshed from Google Patents.
Patent US3851325A successfully refreshed from Google Patents.
US3851325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock and alarm
Assignee: Individual
•
Filing: 1973-03-21
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Granted: 1974-11-26
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Expires: 1993-03-21
Abstract
Abstract A lock and alarm including a bolt and a compression spring located in a bolt casing. A latch is attached to the bolt and moves in a slot to a holding position to retract and hold the bolt. The latch is released to move the bolt to a position where it engages a portion of the receiver. When the bolt is moved off the engaging portion the spring moves it into the receiver and at the same time the latch controls a switch to actuate an alarm.
Inventors
- 👤 M Maged
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:09
CPC Classifications
E; E05; E05B; E05B45/00; E05B45/06; E05B45/08; E05B45/12; Y; Y10; Y10S; Y10S292/00; Y10S292/65; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0997; Y10T292/68
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
412 words
A lock and alarm device comprising in combination a receiver means including an opening; a housing including a first upstanding wall defining an opening, an elongated guide bolt casing formed on the interior of the housing and having a central bore which terminates at one end in an opening at said first housing wall and at the other end at a wall of said casing, said casing also formed with an elongated through slot into said bore having a first portion generally parallel to the longitudinal axis of the bore along at least a part of the length thereof and a second portion which is at an angle to said first portion, an elongated bolt in said casing bore and a spring between one end of said bolt and said casing wall at said other end of said bore, a cover plate attached to said housing and having a slot formed therein with an elongated generally straight first portion corresponding to said first portion of the casing slot, and a curved second portion including at least a part corresponding to said second portion of said casing slot and defining a projection on the plate, a latch pin attached to and generally transverse of said bolt and movable in said casing slot and having a portion extending through said cover plate slot and movable therein; audible alarm means located in said housing, switch means in said housing connected in electrical circuit with said alarm means and having an actuating means in the path of travel of said latch pin, said pin when moved around said projection in said cover plate and resting in a first position against the wall forming said second portion of said slot to hold said bolt in a retracted position with said spring compressed in said bore, said pin being movable in said first portion of said coVer slot from said first position around said projection of said cover plate into an intermediate position when one end of said bolt remote from the end engaged by the spring engages a fixed part adjacent said opening of said receiver means, said one end of said bolt being carried into said receiver opening to a second position by said compressed spring being released as said one end is moved off said fixed part, said pin carried by said bolt as it is moved to said second position engaging the switch actuating means to complete the electric circuit with the alarm means.
Claim 2
Dependent Claim
412 words
A lock and alarm device comprising in combination a receiver means including an opening; a housing including a first upstanding wall defining an opening, an elongated guide bolt casing formed on the interior of the housing and having a central bore which terminates at one end in an opening at said first housing wall and at the other end at a wall of said casing, said casing also formed with an elongated through slot into said bore having a first portion generally parallel to the longitudinal axis of the bore along at least a part of the length thereof and a second portion which is at an angle to said first portion, an elongated bolt in said casing bore and a spring between one end of said bolt and said casing wall at said other end of said bore, a cover plate attached to said housing and having a slot formed therein with an elongated generally straight first portion corresponding to said first portion of the casing slot, and a curved second portion including at least a part corresponding to said second portion of said casing slot and defining a projection on the plate, a latch pin attached to and generally transverse of said bolt and movable in said casing slot and having a portion extending through said cover plate slot and movable therein; audible alarm means located in said housing, switch means in said housing connected in electrical circuit with said alarm means and having an actuating means in the path of travel of said latch pin, said pin when moved around said projection in said cover plate and resting in a first position against the wall forming said second portion of said slot to hold said bolt in a retracted position with said spring compressed in said bore, said pin being movable in said first portion of said coVer slot from said first position around said projection of said cover plate into an intermediate position when one end of said bolt remote from the end engaged by the spring engages a fixed part adjacent said opening of said receiver means, said one end of said bolt being carried into said receiver opening to a second position by said compressed spring being released as said one end is moved off said fixed part, said pin carried by said bolt as it is moved to said second position engaging the switch actuating means to complete the electric circuit with the alarm means.
Claim 3
Dependent Claim
36 words
A device as in claim 1 wherein said latch pin is formed of two pieces, one of which is inserted through the slot on the plate to connect with the other piece attached to the bolt.
Claim 4
Dependent Claim
36 words
A device as in claim 1 wherein said switching means includes at least one switch contact mounted on a leaf spring, said leaf spring comprising said switch actuator means which is engaged by said latch pin.
Claim 5
Dependent Claim
36 words
Apparatus as in claim 1 wherein said fixed part adjacent said receiver means engaged by said one end of said bolt comprises a step on said receiver means recessed from the exterior of said receiver means.
Claim 6
Dependent Claim
307 words
A lock and alarm device comprising a housing including an upstanding wall defining an opening, a guide bolt casing formed on the interior of the housing and having a central bore which terminates at one end in an opening at said housing wall and at the other end at a wall of said casing, said casing also formed with a through slot into said bore having a first portion generally parallel to the longitudinal axis of the bore along part of the length thereof and a second portion which is at an angle to said first portion, a bolt in said casing bore and a spring between one end of said bolt and said casing wall at said other end of said bore, a latch pin attached to said bolt and movable in said slot, audible alarm means located in said housing, switch means in said housing connected in electrical circuit with said alarm means and having an actuating means in the path of travel of said latch pin, said pin when resting in a first position on the wall of said second portion of said slot holding said bolt in its retracted position and said spring in a compressed condition in said bore, said pin when fully released from said first position carried by said bolt as it is moved by the released spring to a second position engaging the switch actuating means to complete the electric circuit with the alarm means, a cover plate for said housing, said cover plate having a slot therein which generally corresponds to the shape of the slot in the bolt casing and is adjacent thereto, said latch pin formed of two pieces, one of which is attached to said bolt and the other of which is inserted through said slot of the plate to connect with said one piece.
Claim 7
Dependent Claim
307 words
A lock and alarm device comprising a housing including an upstanding wall defining an opening, a guide bolt casing formed on the interior of the housing and having a central bore which terminates at one end in an opening at said housing wall and at the other end at a wall of said casing, said casing also formed with a through slot into said bore having a first portion generally parallel to the longitudinal axis of the bore along part of the length thereof and a second portion which is at an angle to said first portion, a bolt in said casing bore and a spring between one end of said bolt and said casing wall at said other end of said bore, a latch pin attached to said bolt and movable in said slot, audible alarm means located in said housing, switch means in said housing connected in electrical circuit with said alarm means and having an actuating means in the path of travel of said latch pin, said pin when resting in a first position on the wall of said second portion of said slot holding said bolt in its retracted position and said spring in a compressed condition in said bore, said pin when fully released from said first position carried by said bolt as it is moved by the released spring to a second position engaging the switch actuating means to complete the electric circuit with the alarm means, a cover plate for said housing, said cover plate having a slot therein which generally corresponds to the shape of the slot in the bolt casing and is adjacent thereto, said latch pin formed of two pieces, one of which is attached to said bolt and the other of which is inserted through said slot of the plate to connect with said one piece.
Claim 8
Dependent Claim
61 words
A device as in claim 5 wherein said slot in said plate has an elongated generally straight first portion corresponding to said first portion of the casing slot, and a curved second portion defining a projection in the plate, said pin being movable in said curved second portion around the plate projection to place said latch pin in said first position.
References Cited (Backward Citations)
US1604540A
Cited
US2756300A
Cited
US2842631A
Cited
US3196293A
Cited
US3402405A
Cited
US3587080A
Cited
US3751088A
Cited
US3768087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |