US3792888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lock
Assignee: Fidelity Bank NA
•
Filing: 1973-01-26
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Granted: 1974-02-19
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Expires: 1993-01-26
Abstract
Abstract An electric lock having two-part bolt with interposed bolt spring and pin and slot connections, a bell crank pivotally connected to bolt, solenoid means for swinging bell crank, a spring for swinging bell crank in one direction when power to solenoid means is shut off, a dead lock lever movable from active to inactive position by the bell crank as latter moves bolt to retracted position, and spring means automatically operable to move dead lock lever to active position into the path of retracting movement of the bolt, when bolt is in extended position, to prevent movement of bolt to retracted position by means other than bell crank, the bolt spring protecting the bell crank and solenoid means against damage by exterior forces applied to the bolt.
Inventors
- 👤 R Kambic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:28
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/06; E05B47/0607; E05B47/0001; E05B47/0002; E05B2047/0007; E05B47/0003; E05B47/0004; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0994; Y10T292/1014; Y10T292/1021; Y10T292/1022; Y10T292/1031
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
137 words
An electric lock, comprising casing means, a bolt having an inner part and an outer part, means for guiding movement of said bolt between retracted position and extended position with said outer part protruding from said casing means, a bell crank pivotally mounted in said casing pivotal connections between said bell crank and said bolt, solenoid means pivotally connected to said bell crank for swinging the same to move said bolt, a dead lock lever movable from active to inactive position by said bell crank as said bolt is being retracted, and spring means automatically operable to move said dead lock lever to active position into the path of retracting movement of said bolt, when the latter is in extended position, to prevent movement of said bolt to retracted position by means other than said bell crank.
Claim 2
Dependent Claim
137 words
An electric lock, comprising casing means, a bolt having an inner part and an outer part, means for guiding movement of said bolt between retracted position and extended position with said outer part protruding from said casing means, a bell crank pivotally mounted in said casing pivotal connections between said bell crank and said bolt, solenoid means pivotally connected to said bell crank for swinging the same to move said bolt, a dead lock lever movable from active to inactive position by said bell crank as said bolt is being retracted, and spring means automatically operable to move said dead lock lever to active position into the path of retracting movement of said bolt, when the latter is in extended position, to prevent movement of said bolt to retracted position by means other than said bell crank.
Claim 3
Dependent Claim
45 words
An electric lock according to claim 1, wherein said solenoid means comprises a first solenoid operable to swing said bell crank to move said bolt to extended position and a second solenoid operable to swing said bell crank to move said bolt to retracted position.
Claim 4
Dependent Claim
28 words
In an electric lock according to claim 1, bell crank spring means operable to swing said bell crank to move said bolt upon deenergization of said solenoid means.
Claim 5
Dependent Claim
46 words
In an electric lock according to claim 1, means interposed between said inner and outer parts of said bolt to initially absorb any retracting force applied exteriorly to said bolt when the same is in extended position to cushion bolt-stopping reaction of said dead lock lever.
Claim 6
Dependent Claim
62 words
An electric lock according to claim 4, wherein said last means comprises a pin and slot connection and a compression spring between said inner and outer parts of said bolt, whereby damage to said bell crank from forces applied to said outer part when said bolt is retracted and possible rendering of said bell crank inoperative by said solenoid means are prevented.
Claim 7
Dependent Claim
28 words
In an electric lock according to claim 1, signal switch means operable by said bell crank in accordance with the positioning of said bolt by said bell crank.
Claim 8
Dependent Claim
29 words
An electric lock according to claim 6, wherein said signal switch means comprises two microswitches and a switch tripper for alternately actuating the same mounted on said bell crank.
Claim 9
Dependent Claim
71 words
In an electric lock according to claim 1 for cooperation with a door movable between closed and open positions relative thereto, door position signal switch means, comprising a switch mounted interiorly of said casing means, a cam mounted in said casing means having an oUter portion protruding through an aperture therein for movement by said door, and means mounted on said cam interiorly of said casing means for actuating said switch.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |