Patent US4871204A successfully refreshed from Google Patents.
US4871204A
Expired / Lapsed
US
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Touch bar release locking system
Assignee: Securitron Magnalock Corp
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Filing: 1988-09-08
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Granted: 1989-10-03
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Expires: 2008-09-08
Abstract
Abstract The touch bar release locking system includes a hollow metal channel which affixes to a door at two points via insulating spacer blocks. Within the channel is housed a capacitive sensor which functions by detecting the additional capacitance coupled to the hollow channel by the act of a person touching it (even through gloves or clothing). When the additional capacitance is detected, a relay energizes and actuation of the relay contacts releases an electric lock which had been securing the door, thereby providing free egress. In the event of catastrophic sensor failure, egress can still be accomplished by pressing an electromechanical push button, mounted on the rear of the hollow channel, which duplicates the effect of energization of the sensor relay.
Inventors
- 👤 Robert C. Cook
- 👤 Mark R. Barton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:33
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/0001; E05B47/0002; E05B47/02; E05B65/00; E05B65/10; E05B65/108; E05C; E05C19/00; E05C19/16; E05C19/166; G; G07; G07C; G07C9/00; G07C9/00174; G07C9/00658; G07C9/00714; E05B47/0006; E05B49/00; Y; Y10; Y10T; Y10T292/00; Y10T292/11; Y10T292/57; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7057
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
97 words
A quick release locking system comprising: electromagnetic locking means for maintaining a door closed; switch means for releasing said electromagnetic locking means to permit opening of the door; circuit means having an input sensitive to increased capacitance for operating said switch means; and a touch bar, including an extended conductive member coupled to the input to said circuit means, and means for mounting said bar on a door; whereby when said bar is touched or pushed by a person seeking to pass through the door, the locking means is released and the door is free to open.
Claim 2
Dependent Claim
97 words
A quick release locking system comprising: electromagnetic locking means for maintaining a door closed; switch means for releasing said electromagnetic locking means to permit opening of the door; circuit means having an input sensitive to increased capacitance for operating said switch means; and a touch bar, including an extended conductive member coupled to the input to said circuit means, and means for mounting said bar on a door; whereby when said bar is touched or pushed by a person seeking to pass through the door, the locking means is released and the door is free to open.
Claim 3
Dependent Claim
16 words
A system as defined in claim 1 where said circuit means is mounted in said bar.
Claim 4
Dependent Claim
23 words
A system as defined in claim 1 further comprising push button switch means for releasing said electromagnetic locking means, mounted on said bar.
Claim 5
Dependent Claim
113 words
A system as defined in claim 1 wherein said circuit means includes (a) flip flop circuit means for operating said switch means, said flip flop circuit means including a clock input and a variable input for changing the state of said flip flop only when the variable input follows the clock input; (b) a square wave oscillator; (c) means for applying the output from said square wave oscillator to said clock input to provide a reference timing signal, and to said variable input with a delay dependent on the capacitance seen at said bar, whereby persons touching said bar delay the variable input and change the state of said flip flop circuit means.
Claim 6
Dependent Claim
35 words
A system as defined in claim 1 wherein said electromagnetic locking means is a large electromagnet and a strike plate or armature, mounted with one on the door frame and the other on the door.
Claim 7
Dependent Claim
34 words
A system as defined in claim 1 wherein said circuit means is mounted on a printed circuit board, and wherein said bar includes a pair of grooves for removably receiving said printed circuit board.
Claim 8
Dependent Claim
25 words
A system as defined in claim 1 wherein said bar is rectangular and insulated block means are provided for mountnng said bar to said door.
Claim 9
Dependent Claim
180 words
A touch operated control system comprising: means having two states controlling a physical action; switch means for changing the state of said controlling means; circuit means having an input sensitive to increased capacitance for operating said switch means; a touch means, including an extended conductive member connected to the input to said circuit means; means for mounting said touch means where it may be manually touched by a person desiring to actuate the controlling means; said circuit means including (a) flip flop circuit means for operating said switch means, said flip flop circuit means including a clock input and a variable input for changing the state of said flip flop only when the variable input follows the clock input; (b) a square wave oscillator; (c) means for applying the output from said square wave oscillator to said clock input to provide a reference timing signal, and to said variable input with a delay dependent on the capacitance seen at said bar, whereby persons touching said bar delay the variable input and change the state of said flip flop circuit means.
Claim 10
Dependent Claim
180 words
A touch operated control system comprising: means having two states controlling a physical action; switch means for changing the state of said controlling means; circuit means having an input sensitive to increased capacitance for operating said switch means; a touch means, including an extended conductive member connected to the input to said circuit means; means for mounting said touch means where it may be manually touched by a person desiring to actuate the controlling means; said circuit means including (a) flip flop circuit means for operating said switch means, said flip flop circuit means including a clock input and a variable input for changing the state of said flip flop only when the variable input follows the clock input; (b) a square wave oscillator; (c) means for applying the output from said square wave oscillator to said clock input to provide a reference timing signal, and to said variable input with a delay dependent on the capacitance seen at said bar, whereby persons touching said bar delay the variable input and change the state of said flip flop circuit means.
Claim 11
Dependent Claim
22 words
A touch operated control system as defined in claim 8 wherein said means for controlling a physical action is an electromagnetic lock.
Claim 12
Dependent Claim
28 words
A touch operated control system as defined in claim 8 wherein said touch means is a bar, and means are provided for mounting said bar on a door.
Claim 13
Dependent Claim
16 words
A system as defined in claim 10 where said circuit means is mounted in said bar.
Claim 14
Dependent Claim
25 words
A system as defined in claim 10 further comprising push button switch means for changing the state of said controlling means mounted on said bar.
Claim 15
Dependent Claim
112 words
A touch operated control system comprising: electric means having two states for controlling a physical action; switch means for changing the state of said controlling means; circuit means having an input sensitive to increased capacitance for operating said switch means; a touch bar, including an extended conductive member connected to the input to said circuit means, and means for mounting said bar on a door; and push button switch means for releasing said electromagnetic locking means, mounted on said bar; whereby when said bar is touched or said push button is pushed by a person seeking to pass through the door, the electric means is switched from one state to the other.
Claim 16
Dependent Claim
112 words
A touch operated control system comprising: electric means having two states for controlling a physical action; switch means for changing the state of said controlling means; circuit means having an input sensitive to increased capacitance for operating said switch means; a touch bar, including an extended conductive member connected to the input to said circuit means, and means for mounting said bar on a door; and push button switch means for releasing said electromagnetic locking means, mounted on said bar; whereby when said bar is touched or said push button is pushed by a person seeking to pass through the door, the electric means is switched from one state to the other.
Claim 17
Dependent Claim
16 words
A system as defined in claim 13 where said circuit means is mounted in said bar.
Claim 18
Dependent Claim
113 words
A system as defined in claim 13 wherein said circuit means includes (a) flip flop circuit means for operating said switch means, said flip flop circuit means including a clock input and a variable input for changing the state of said flip flop only when the variable input follows the clock input; (b) a square wave oscillator; (c) means for applying the output from said square wave oscillator to said clock input to provide a reference timing signal, and to said variable input with a delay dependent on the capacitance seen at said bar, whereby persons touching said bar delay the variable input and change the state of said flip flop circuit means.
Claim 19
Dependent Claim
23 words
A touch operated control system as defined in claim 13 wherein said electric means for controlling a physical action is an electromagnetic lock.
Claim 20
Dependent Claim
34 words
A system as defined in claim 13 wherein said circuit means is mounted on a printed circuit board, and wherein said bar includes a pair of grooves for removably receiving said printed circuit board.
Claim 21
Dependent Claim
25 words
A system as defined in claim 13 wherein said bar is rectangular and insulated block means are provided for mounting said bar to said door.
References Cited (Backward Citations)
US3496381A
Cited
US3495353A
Cited
US4168495A
Cited
US4287513A
Cited
US4652862A
Cited
US4682801A
Cited
US4763937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |