US3872696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination lock and fail-safe latch for exit doors
Assignee: Individual
•
Filing: 1973-10-15
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Granted: 1975-03-25
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Expires: 1993-10-15
Abstract
Abstract Combination lock and fail-safe latch for exit doors in which a locking bolt of a lock mechanism on a door frame is spring urged to an unlocked position with respect to a closed door, and is operable to a locked position by electrically energized actuator means, the locking bolt being movable from a locked position to an unlocked position by means of a bolt ejector of a locking mechanism on the door, the bolt ejector comprising a component of a door lock assembly or an attachment thereto, and being supported for movements to a retracted position and an advanced position, means normally urging the bolt ejector to the retracted position and manual actuator means being operable from the inside of the door to move the bolt ejector to an advanced position for ejecting and moving the locking bolt from locked position to unlocked position. A fail-safe feature is accomplished by providing the locking bolt and bolt ejector respectively with magnet members arranged with their adjacent pole ends in a repulsion mode to produce a magnetic force for moving the locking bolt to unlocked position upon deenergization of the electric actuator means in the event of failure of the spring urging means.
Inventors
- 👤 Arthur V Geringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:05
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/02; E05B47/026; E05B47/0001; E05B47/0002; E05B47/0038; E05B47/004; E05B15/00; E05B15/10; E05B15/101; E05B2047/0084; E05B2047/0086; E05B47/0003; E05B47/0004; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0834; Y10T292/0836; Y10T292/0837; Y10T292/084; Y10T292/175; Y10T292/18; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5372; Y10T70/5385; Y10T70/5389; Y10T70/70; Y10T70/7051; Y10T70/7062; Y10T70/7119; Y10T70/80; Y10T70/8027
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
169 words
Fail-safe locking means for a door element supported for movements to opened and closed positions with respect to an associated door frame element comprising: a. first and second bolt means each mounted on one of said elements, each of said bolt means being operable between an extended and retracted position in relation to the other of said elements; b. manual actuating means on one of said elements for said first and second bolt means including: an accessible outside member operable to move one of said bolt means to its retracted position, and an accessible inside member operable to move both of said bolt means to retractable positions; and c. electrically controlled means operably associated with one of said bolt means, and upon energization retaining said elements against relative movement from a closed to opened position by said outside member, but upon deenergization permitting relative opening movement of said elements in response to the actuation of the other of said bolt means to its retracted position by said outside member.
Claim 2
Dependent Claim
169 words
Fail-safe locking means for a door element supported for movements to opened and closed positions with respect to an associated door frame element comprising: a. first and second bolt means each mounted on one of said elements, each of said bolt means being operable between an extended and retracted position in relation to the other of said elements; b. manual actuating means on one of said elements for said first and second bolt means including: an accessible outside member operable to move one of said bolt means to its retracted position, and an accessible inside member operable to move both of said bolt means to retractable positions; and c. electrically controlled means operably associated with one of said bolt means, and upon energization retaining said elements against relative movement from a closed to opened position by said outside member, but upon deenergization permitting relative opening movement of said elements in response to the actuation of the other of said bolt means to its retracted position by said outside member.
Claim 3
Dependent Claim
98 words
Locking means according to claim 1, wherein said one of said bolt means comprises a locking bolt mounted on the door frame element; the other of said bolt means comprises a latch bolt mounted on the door element, and said actuating means is mounted on the door element and includes: a bolt ejector mounted for selective movements to advanced and retracted positions, said bolt ejector in the closed position of said door element being axially aligned with said locking bolt, and upon movement to said advanced position being operative to move said locking bolt to its retracted position.
Claim 4
Dependent Claim
121 words
Locking means according to claim 2, wherein said one of said bolt means includes a striker plate having an opening through which the locking bolt is extendable and retractable; the other of said bolt means comprises a mortise lock assembly with a face plate having an opening foR receiving the outer end of the locking bolt when the door element is in closed position, and for receiving the outer end of the bolt ejector when moved to its advanced position; said face plate having a second opening through which said latch bolt is extendable and retractable, and said striker plate having a second opening for receiving the outer end of the latch bolt in the closed position of the door element.
Claim 5
Dependent Claim
94 words
Locking means according to claim 2, wherein said one of said bolt means includes a striker plate having an opening through which the locking bolt is extendable and retractable; the other of said bolt means comprises an attachment for a door element lock assembly, said attachment including a housing mountable on the rear surface of the door element, said bolt ejector being mounted in the housing for advanced and retractable movement through a housing opening adapted to receive the locking bolt in its extended position and when the door element is in closed position.
Claim 6
Dependent Claim
14 words
Locking means according to claim 4, wherein the lock assembly is a cylindrical lock.
Claim 7
Dependent Claim
64 words
Locking means according to claim 2, including means providing a force normally urging said locking bolt towards said retracted position; and said electrically controlled means upon energization acting to move said locking bolt from said retracted position to said extended position against said urging force, whereby upon deenergization of said electrically controlled means, said urging force returns said locking bolt to its retracted position.
Claim 8
Dependent Claim
98 words
Locking means according to claim 6, wherein the means normally urging said locking bolt towards said retracted position comprises a spring; the electrically controlled means comprises a solenoid connected with said locking bolt operable upon energization to move said locking bolt from said retracted position to said extended position against the force of said spring; and including a magnet carried by said locking bolt coacting with a magnet carried by said bolt ejector to provide a magnetic force supplementary to said spring for moving said locking bolt to its retracted position upon failure of the spring to function.
Claim 9
Dependent Claim
34 words
Locking means according to claim 6, wherein the electrically controlled means comprises a solenoid having a reciprocable plunger axially aligned with and connected to said locking bolt, and said urging means comprises a spring.
Claim 10
Dependent Claim
71 words
Locking means according to claim 6, including an energizing circuit connecting said electrically controlled means with an electrical source; switch means mounted on said door frame including a reed switch having normally open contacts in said circuit; and a magnet carried by the door element arranged to be juxtaposed to said switch and operate said contacts to circuit closing position in response to movement of said door element to closed position.
Claim 11
Dependent Claim
27 words
Locking means according to claim 9, in which a key-controlled switch mounted on said door frame has normally closed contacts connected in series with said reed switch.
Claim 12
Dependent Claim
41 words
Locking means according to claim 6, including means coactive between said locking bolt and said bolt ejector providing a magnetic force supplementary to said urging force for moving said locking bolt to its retracted position upon failure of said urging means.
Claim 13
Dependent Claim
28 words
Locking means according to claim 4, wherein the means providing said magnetic force comprises permanent magnets having one set of their like poles positioned in a repulsion mode.
Claim 14
Dependent Claim
26 words
Locking means according to claim 12, wherein one permanent magnet is carried by said locking bolt, and another permanent magnet is carried by said bolt ejector.
Claim 15
Dependent Claim
30 words
Locking means according to claim 13, wherein the like poles are in juxtaposed relation when the door element is in closed position and the locking bolt is in extended position.
Claim 16
Dependent Claim
37 words
Locking means according to claim 13, in which said actuating means includes a cam member engaged with said bolt ejector, and the magnet carried by said bolt ejector normally urges thE bolt ejector against said cam member.
Claim 17
Dependent Claim
45 words
Locking means according to claim 13, including a monitor circuit; and switch means having normally open contacts in said circuit which are operable to circuit closing position by the magnet on said locking bolt in response to movement of said locking bolt to retracted position.
Claim 18
Dependent Claim
38 words
Locking means according to claim 16, wherein said switch means includes a reed switch, and a magnet carried by the locking bolt is arranged to be juxtaposed to said switch in the retracted position of said locking bolt.
References Cited (Backward Citations)
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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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |