Patent US3603958A successfully refreshed from Google Patents.
US3603958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm device for window or door lock
Assignee: Individual
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Filing: 1968-06-17
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Granted: 1971-09-07
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Expires: 1988-06-17
Abstract
Abstract A unitary alarm device for use with window or door locks which signals unauthorized unlocking, opening or removal. The device is incorporated in the nonoperating portion of the lock assembly which may be used in present installations or new installations without alteration to structures. The device incorporates a structure for deactivating the alarm when unlocking, opening or removal of access structure is authorized.
Inventors
- 👤 Eric C Wahlberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:07
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
A compact self-contained alarm device and energy source for coacting with a locking device provided with locking means comprising an enclosure having said alarm device, energy source, and a connecting means located between said alarm device and said energy source mounted within said enclosure, said enclosure having an opening to accommodate said locking means of said locking device, said connecting means including at least one switch means for completing a circuit from said energy source to said alarm device in response to said locking device being in the unlocked position, and said switch means being open in said connecting means in response to said locking device beinG in the locked position.
Claim 2
Dependent Claim
111 words
A compact self-contained alarm device and energy source for coacting with a locking device provided with locking means comprising an enclosure having said alarm device, energy source, and a connecting means located between said alarm device and said energy source mounted within said enclosure, said enclosure having an opening to accommodate said locking means of said locking device, said connecting means including at least one switch means for completing a circuit from said energy source to said alarm device in response to said locking device being in the unlocked position, and said switch means being open in said connecting means in response to said locking device beinG in the locked position.
Claim 3
Dependent Claim
49 words
A compact self-contained alarm device as claimed in claim 1 wherein there are two spaced terminals, said switch means including a switch having its movable member positioned between said terminals having a common connection in said connecting means in response to said locking means being in the locked position.
Claim 4
Dependent Claim
51 words
A compact self-contained alarm device as claimed in claim 1 further comprising a selectively manually operated mechanical means other than the locking means coacting with the movable member of said switch means to cause said movable member to be in open position regardless of the operative condition of said locking means.
Claim 5
Dependent Claim
30 words
A compact self-contained alarm device as claimed in claim 1 wherein said locking device is a catch and a coacting latching cam for mounting on adjacent sashes of a window.
Claim 6
Dependent Claim
43 words
A compact self-contained alarm device as claimed in claim 1 wherein said locking device is a door lock having a bolt, the latter engaging said switch means in the locked position thereof for holding the same in open position in said connecting means.
Claim 7
Dependent Claim
66 words
A compact self-contained alarm device as claimed in claim 2 further comprising an antiforcing spring having one end engaging the housing, said antiforcing spring being electrically connected to one of said terminals, and the other end of said antiforcing spring being biased in a downward direction thereby causing said antiforcing spring to engage said switch means when said self-contained alarm device is removed from its environs.
Claim 8
Dependent Claim
37 words
A compact self-contained alarm device as claimed in claim 1 wherein said alarm device constitutes a rotatable cam and diaphragm whereby when said circuit is actuated said cam rotates on said diaphragm to create an audible alarm.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |