US3600643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security system
Assignee: Individual
•
Filing: 1968-12-04
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Granted: 1971-08-17
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Expires: 1988-12-04
Abstract
Abstract A security system in which maximum security is provided by obviating the use of keys and also by making operation by a trial and error technique or by detection devices impossible. In the disclosed embodiment a circuitry is in combination with a mechanism having a shaft which can be rotated by the user to different angular positions which are indicated by suitable indicia and has two rotors mounted thereon, each of which has a spring which drives a ratchet wheel only when its corresponding rotor is turned in a particular direction, the ratchet wheels each being engaged by a pawl spring which allows it to rotate only in the particular direction in which it may be driven by its corresponding rotor. The directions in which the ratched wheels may be rotated by the respective rotors are opposite and one of the wheels has all but one of its teeth electrically conductive so that a current passing from the rotor, its spring, and through its corresponding wheel and pawl spring will energize a time delay mechanism which will operate to prevent the actuation of a latch release mechanism unless that rotor is turned to bring the nonconductive tooth against the pawl spring, the other wheel having all but one of its teeth nonconductive so that rotation of the rotor to bring the conductive tooth against a corresponding pawl spring allows current to pass from that rotor and wheel and through the associated pawl spring to a solenoid to energize a mechanism which will thereby permit actuation of the latch release mechanism.
Inventors
- 👤 Arthur Marquis Losey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:54
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/00174; G07C9/00658; G07C9/00666
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
534 words
A security system for preventing unauthorized operation of a control mechanism comprising: a latch release switch having a normally open switch connected to said control mechanism and a normally closed switch; a source of electric energy; a manually operable, normally open, release switch; a manually operable, normally closed, spoiler switch; a manually operable main switch for simultaneously connecting said release switch and said spoiler switch with said source of electric energy; a first relay, said first relay being a delay relay having switch actuating means and a pair of switches which operate in unison when actuated by said actuating means, said one switch of said first relay being normally closed, said other switch of said first relay being normally open so that when said actuating means opens said one switch, said other switch is closed, said actuating means being connected to said spoiler switch so that energy will pass from said electrical energy source and through said actuating means of said first relay when said main switch and said spoiler switch are closed; a second relay, said second relay having substantially no delay period and comprising switch actuating means and a switch, said actuating means of said second relay being connected with said actuating means of said first relay, said switch of said second relay and one of the switches of said first relay being connected together in series and with said release switch and said normally open switch of said latch release switch; a third relay, said third relay being a time delay relay with a switch and switch actuating means, said actuating means of said third relay being connected between said release switch and said normally closed switch of said latch release switch the switch of said third relay being connected between said source of electric energy and the other switch of said first relay, said other switch of said other relay being connected between said switch of said third relay and said actuating means of said first relay; the delay period of said first relay being selected so that current flowing through the actuating means thereof from said spoiler switch will cause said relay to be actuated before the time an unauthorized person could be expected to close said spoiler switch, the time delay of said third relay being comparatively long; whereby when said main switch is closed said spoiler switch can be opened before the switch of said first relay is actuated so that said release switch can then be closed to permit energy to pass to said normally open switch of said latch release switch; through said one switch of said first relay and said switch of said second relay, but where, if said spoiler switch is not opened before said first relay actuates, said release switch can be closed to energizE the actuating means of said third relay, so that, eventually said switch of said third relay will open to discontinue current flow through the other switch of said first relay to the actuating means of said first relay so that said one switch of said first relay closes to permit energy to pass from said release switch to said normally open switch of said latch release switch.
Claim 2
Dependent Claim
534 words
A security system for preventing unauthorized operation of a control mechanism comprising: a latch release switch having a normally open switch connected to said control mechanism and a normally closed switch; a source of electric energy; a manually operable, normally open, release switch; a manually operable, normally closed, spoiler switch; a manually operable main switch for simultaneously connecting said release switch and said spoiler switch with said source of electric energy; a first relay, said first relay being a delay relay having switch actuating means and a pair of switches which operate in unison when actuated by said actuating means, said one switch of said first relay being normally closed, said other switch of said first relay being normally open so that when said actuating means opens said one switch, said other switch is closed, said actuating means being connected to said spoiler switch so that energy will pass from said electrical energy source and through said actuating means of said first relay when said main switch and said spoiler switch are closed; a second relay, said second relay having substantially no delay period and comprising switch actuating means and a switch, said actuating means of said second relay being connected with said actuating means of said first relay, said switch of said second relay and one of the switches of said first relay being connected together in series and with said release switch and said normally open switch of said latch release switch; a third relay, said third relay being a time delay relay with a switch and switch actuating means, said actuating means of said third relay being connected between said release switch and said normally closed switch of said latch release switch the switch of said third relay being connected between said source of electric energy and the other switch of said first relay, said other switch of said other relay being connected between said switch of said third relay and said actuating means of said first relay; the delay period of said first relay being selected so that current flowing through the actuating means thereof from said spoiler switch will cause said relay to be actuated before the time an unauthorized person could be expected to close said spoiler switch, the time delay of said third relay being comparatively long; whereby when said main switch is closed said spoiler switch can be opened before the switch of said first relay is actuated so that said release switch can then be closed to permit energy to pass to said normally open switch of said latch release switch; through said one switch of said first relay and said switch of said second relay, but where, if said spoiler switch is not opened before said first relay actuates, said release switch can be closed to energizE the actuating means of said third relay, so that, eventually said switch of said third relay will open to discontinue current flow through the other switch of said first relay to the actuating means of said first relay so that said one switch of said first relay closes to permit energy to pass from said release switch to said normally open switch of said latch release switch.
Claim 3
Dependent Claim
24 words
The security system defined in claim 1 wherein said switch actuating means of each of said first, second and third relays is a coil.
Claim 4
Dependent Claim
30 words
The security system defined in claim 1 further comprising a security switch connected between the switch of said second relay and said normally open switch of said latch release switch.
Claim 5
Dependent Claim
42 words
The security system defined in claim 3 further comprising a signal generating device connected on one side to said other switch of said first relay and on the other side to the actuating means of said first and second relays in parallel.
Claim 6
Dependent Claim
16 words
The security system defined in claim 4 wherein said signal generating device functions by emitting sound.
Claim 7
Dependent Claim
16 words
The security system defined in claim 5 wherein said source of electric energy is a battery.
Claim 8
Dependent Claim
31 words
The security system defined in claim 6 wherein said release switch and said spoiler switch are rotary switches which can be operated only by rotating a knob to a correct position.
References Cited (Backward Citations)
US2436809A
Cited
US3475932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |