Patent US3657908A successfully refreshed from Google Patents.
US3657908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain door lock
Assignee: TAYLOR LOCK CO
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Filing: 1970-06-02
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Granted: 1972-04-25
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Expires: 1990-06-02
Abstract
Abstract A door lock including a chain, means for detachably connecting one end of the chain to a door, and a housing for affixation to the door jamb having an opening for receiving a member on the other end of the chain and releasably securing the latter in the housing, the chain being releasable from the housing by key lock means accessible through the doorway.
Inventors
- 👤 Jerome Schwartz
- 👤 Ryszard Szatkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:30
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/36; E05C17/365; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0911; Y10T292/0926; Y10T292/0928; Y10T292/093; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5164; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7667; Y10T70/7706; Y10T70/7718
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
175 words
A chain door lock comprising chain connection means for attaching one end of a chain to a door, a chain having one end attached to a door by said connection means, a housing for mounting on a door jamb and having an opening facing away from the door jamb for receiving a chain member on the other end of said chain, a latch member mounted in said housing spaced laterally between opposite sides of said housing for rotation about a generally horizontal first axis to move generally vertically into and out of holding engagement with a received chain member, a key lock cylinder mounted in said housing extending between opposite housing sides for rotation about a second axis generally parallel to said first axis, and operating formations formed on said cylinder spaced intermediate the ends thereof for movement in operative engagement with said latch member to effect movement of the latter into and out of said holding engagement, said latch member including a projection extending into said operating formations to positively resist longitudinal cylinder movement.
Claim 2
Dependent Claim
175 words
A chain door lock comprising chain connection means for attaching one end of a chain to a door, a chain having one end attached to a door by said connection means, a housing for mounting on a door jamb and having an opening facing away from the door jamb for receiving a chain member on the other end of said chain, a latch member mounted in said housing spaced laterally between opposite sides of said housing for rotation about a generally horizontal first axis to move generally vertically into and out of holding engagement with a received chain member, a key lock cylinder mounted in said housing extending between opposite housing sides for rotation about a second axis generally parallel to said first axis, and operating formations formed on said cylinder spaced intermediate the ends thereof for movement in operative engagement with said latch member to effect movement of the latter into and out of said holding engagement, said latch member including a projection extending into said operating formations to positively resist longitudinal cylinder movement.
Claim 3
Dependent Claim
40 words
A chain door lock according to claim 1, said latch member being swingable up and down in said housing and comprising a catch swingable in one direction through said received chain member to releasably hold the latter in said housing.
Claim 4
Dependent Claim
26 words
A chain door lock according to claim 2, said first axis being located relative to said catch for positive holding engagement with said received chain member.
Claim 5
Dependent Claim
34 words
A chain door lock according to claim 3, in combination with spring means operatively connected to said latch member to urge said catch toward its position of holding engagement with said received chain member.
Claim 6
Dependent Claim
27 words
A chain door lock according to claim 3, said connection means comprising a slideway for mounting on a door, and a slide removably interengageable with said slideway.
Claim 7
Dependent Claim
21 words
A chain door lock according to claim 3, said other end chain member comprising a chain link engageable through said opening.
References Cited (Backward Citations)
US1316327A
Cited
US3125875A
Cited
GB191206448A
Cited
GB191225772A
Cited
DE319545C
Cited
US3071958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |