Patent US4580820A successfully refreshed from Google Patents.
US4580820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security devices
Assignee: Assa Abloy Financial Services AB
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Filing: 1985-01-28
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Granted: 1986-04-08
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Expires: 2005-01-28
Abstract
Abstract A lock in the form of a night latch comprising a spring, an elongated member connected to the spring, a head on the elongated member to mount the spring on a receiving device, a securing device mounted on a second receiving device with which the head can be engaged in use in a manner such that some distortion of the spring can occur with the head remaining in engagement with the securing device, but so that the head can be completely disengaged from said securing device if desired.
Inventors
- 👤 Murray J. Baber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:06
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/36; E05C17/365; Y; Y10; Y10T; Y10T292/00; Y10T292/28; Y10T292/283; Y10T292/68; Y10T292/696; Y10T292/702
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
256 words
A lock comprising: a spring; an elongated member connected with said spring; a head on said elongated member; fixing means for mounting said spring on a first receiving device so that said elongated member is extendable and retractable with respect thereto; a housing mountable on a second receiving device having front and side walls and a channel one side of which is formed by said side wall, said front wall being adjacent said fixing means when said receiving devices are juxtaposed; a slot in said side wall of said housing; an aperture in said front wall of said housing forming an entrance opening to said channel and slot through which said head and elongated member can pass, respectively, when said elongated member is fully retracted with said elongated member extending through said slot; a closure member movable to at least party close said entrance opening so that with said closure member in a closed position some distortion of said spring can occur upon relative opening movement between said first and second receiving devices with said head remaining in engagement with said housing and said elongated member extending through said opening and with said closure member moved from said closed position said head and elongated member can be completely disengaged from said housing, said slot and channel being positioned so that with said housing correctly located on said second receiving device, relative closing and opening movement between said first receiving device and said second receiving device will cause said head to enter and exit said channel respectively.
Claim 2
Dependent Claim
256 words
A lock comprising: a spring; an elongated member connected with said spring; a head on said elongated member; fixing means for mounting said spring on a first receiving device so that said elongated member is extendable and retractable with respect thereto; a housing mountable on a second receiving device having front and side walls and a channel one side of which is formed by said side wall, said front wall being adjacent said fixing means when said receiving devices are juxtaposed; a slot in said side wall of said housing; an aperture in said front wall of said housing forming an entrance opening to said channel and slot through which said head and elongated member can pass, respectively, when said elongated member is fully retracted with said elongated member extending through said slot; a closure member movable to at least party close said entrance opening so that with said closure member in a closed position some distortion of said spring can occur upon relative opening movement between said first and second receiving devices with said head remaining in engagement with said housing and said elongated member extending through said opening and with said closure member moved from said closed position said head and elongated member can be completely disengaged from said housing, said slot and channel being positioned so that with said housing correctly located on said second receiving device, relative closing and opening movement between said first receiving device and said second receiving device will cause said head to enter and exit said channel respectively.
Claim 3
Dependent Claim
44 words
A lock as claimed in claim 1 wherein said closure member comprises a bifurcated member rotatable across said opening so that said bifurcated arms are positioned adjacent said slot, the distance between said bifurcated arms being smaller than the outer dimensions of said head.
Claim 4
Dependent Claim
61 words
A lock as claimed in claim 2 wherein: said spring comprises a compression spring; said fixing means comprises an apertured fixing plate; said head comprises an enlarged head; and said elongated member comprises a chain passing axially through said spring and though the aperture in said plate having links shaped to allow flexing of the chain substantially in one direction only.
Claim 5
Dependent Claim
24 words
A lock as claimed in claim 1 wherein said closure member is rotatable about an axis substantially perpendicular to the axis of said slot.
Claim 6
Dependent Claim
23 words
A lock as claimed in claim 1 wherein said spring comprises a compression spring and said elongated member extends axially through said spring.
Claim 7
Dependent Claim
26 words
A lock as claimed in claim 1 wherein said fixing means comprises an apertured fixing plate, said elongated member passing through the aperture in said plate.
Claim 8
Dependent Claim
14 words
A lock as claimed in claim 1 wherein said head comprises an enlarged head.
Claim 9
Dependent Claim
14 words
A lock as claimed in claim 1 wherein said elongated member comprises a chain.
Claim 10
Dependent Claim
26 words
A lock as claimed in claim 8 wherein the links of said chain are shaped to allow flexing of said chain substantially only in one direction.
Claim 11
Dependent Claim
188 words
A lock comprising: a spring; an elongated member connected with said spring; a head on said elongated member; fixing means to mount said spring on a first receiving device; a housing mountable on a second receiving device; a slot in said housing; said slot having an entrance opening through which said head can pass so that said elongated member extends through said slot; and a closure member comprising a bifurcated member having arms rotatably movable across said entrance opening to a position adjacent said slot to at least partly close said entrance opening, the distance between said arms being smaller than the diameter of said head, so that with said closure member in a closed position some distortion of said spring can occur with said head remaining in engagement with said housing, but with said closure member moved from said closed position said head can be completely disengaged from said housing, said slot being positioned so that with said housing correctly located on said second receiving device, relative closing movement between said first receiving device and said second receiving device will cause said head to enter said slot.
Claim 12
Dependent Claim
188 words
A lock comprising: a spring; an elongated member connected with said spring; a head on said elongated member; fixing means to mount said spring on a first receiving device; a housing mountable on a second receiving device; a slot in said housing; said slot having an entrance opening through which said head can pass so that said elongated member extends through said slot; and a closure member comprising a bifurcated member having arms rotatably movable across said entrance opening to a position adjacent said slot to at least partly close said entrance opening, the distance between said arms being smaller than the diameter of said head, so that with said closure member in a closed position some distortion of said spring can occur with said head remaining in engagement with said housing, but with said closure member moved from said closed position said head can be completely disengaged from said housing, said slot being positioned so that with said housing correctly located on said second receiving device, relative closing movement between said first receiving device and said second receiving device will cause said head to enter said slot.
Claim 13
Dependent Claim
23 words
A lock as claimed in claim 10 wherein said spring comprises a compression spring and said elongated member extends axially through said spring.
Claim 14
Dependent Claim
61 words
A lock as claimed in claim 10 wherein: said spring comprises a compression spring; said fixing means comprises an apertured fixing plate; said head comprises an enlarged head; and said elongated member comprises a chain passing axially through said spring and through the aperture in said plate having links shaped to allow flexing of the chain substantially in one direction only.
Claim 15
Dependent Claim
168 words
A lock comprising: a spring; an elongated member connected with said spring; a head on said elongated member; fixing means to mount said spring on a first receiving device; a housing mountable on a second receiving device; a slot in said housing; said slot having an entrance through which said head can pass so that said elongated member extends through said slot; and a closure member rotatably movable about an axis substantially perpendicular to the axis of said slot to at least partly close said entrance so that with said closure member in a closed position some distortion of said spring can occur with said head remaining in engagement with said housing, but with said closure member moved from said closed position said head can be completely disengaged from said housing, said slot being positioned so that with said housing correctly located on said second receiving device, relative closing movement between said first receiving device and said second receiving device will cause said head to enter said slot.
Claim 16
Dependent Claim
168 words
A lock comprising: a spring; an elongated member connected with said spring; a head on said elongated member; fixing means to mount said spring on a first receiving device; a housing mountable on a second receiving device; a slot in said housing; said slot having an entrance through which said head can pass so that said elongated member extends through said slot; and a closure member rotatably movable about an axis substantially perpendicular to the axis of said slot to at least partly close said entrance so that with said closure member in a closed position some distortion of said spring can occur with said head remaining in engagement with said housing, but with said closure member moved from said closed position said head can be completely disengaged from said housing, said slot being positioned so that with said housing correctly located on said second receiving device, relative closing movement between said first receiving device and said second receiving device will cause said head to enter said slot.
Claim 17
Dependent Claim
23 words
A lock as claimed in claim 13 wherein said spring comprises a compression spring and said elongated member extends axially through said spring.
Claim 18
Dependent Claim
246 words
A lock comprising: a spring; an elongated member connected with said spring; a head on said elongated member; fixing means for mounting said spring on a first receiver device so that said elongated member is extendable and retractable with respect thereto; a housing mountable on a second receiving device, said housing having front and side walls with said front wall being adjacent said fixing means when said receiving devices are juxtaposed; a slot in said side wall of said housing; an aperture in said front wall of said housing forming an entrance opening through which said head and elongated member can pass, respectively; when said elongated member is fully retracted; a closure member movable to at least partly close said aperture so that in use with said closure member in an open position a relative closing movement between said receiving devices alone will cause said head to become positioned in said housing with said elongated member extending through said slot and so that with said closure member in a closed position, and said head within said housing, some flexing of said spring can occur on relative opening movement between said first receiving device and said second receiving device with said head remaining in engagement with said housing and said elongated member extending through said aperture, and with said closure member moved from said closed position said head and elongated member can be completely disengaged from said housing by relative opening movement between said receiving devices alone.
Claim 19
Dependent Claim
246 words
A lock comprising: a spring; an elongated member connected with said spring; a head on said elongated member; fixing means for mounting said spring on a first receiver device so that said elongated member is extendable and retractable with respect thereto; a housing mountable on a second receiving device, said housing having front and side walls with said front wall being adjacent said fixing means when said receiving devices are juxtaposed; a slot in said side wall of said housing; an aperture in said front wall of said housing forming an entrance opening through which said head and elongated member can pass, respectively; when said elongated member is fully retracted; a closure member movable to at least partly close said aperture so that in use with said closure member in an open position a relative closing movement between said receiving devices alone will cause said head to become positioned in said housing with said elongated member extending through said slot and so that with said closure member in a closed position, and said head within said housing, some flexing of said spring can occur on relative opening movement between said first receiving device and said second receiving device with said head remaining in engagement with said housing and said elongated member extending through said aperture, and with said closure member moved from said closed position said head and elongated member can be completely disengaged from said housing by relative opening movement between said receiving devices alone.
Claim 20
Dependent Claim
44 words
A lock as claimed in claim 15 wherein said closure member comprises a bifurcated member movable across said opening so that said bifurcated arms are positioned adjacent said slot, the distance between said bifurcated arms being smaller than the outer dimensions of said head.
Claim 21
Dependent Claim
24 words
A lock as claimed in claim 16 wherein said closure member is rotatable about an axis substantially perpendicular to the axis of said slot.
Claim 22
Dependent Claim
23 words
A lock as claimed in claim 15 wherein said spring comprises a compression spring and said elongated member extends axially through said spring.
Claim 23
Dependent Claim
27 words
A lock as claimed in claim 15 wherein said fixing means comprises an apertured fixing plate and said elongated member passes through the aperture in said plate.
Claim 24
Dependent Claim
14 words
A lock as claimed in claim 15 wherein said elongated member comprises a chain.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |