US3583740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exit device vertical rod collapsible latch bolt
Assignee: NI West Inc
•
Filing: 1968-08-22
•
Granted: 1971-06-08
•
Expires: 1988-08-22
Abstract
Abstract An exit device consisting of a crossbar adapted to be pushed to raise upper and lower vertical actuating rods which in turn release respective upper and lower latch bolts so that the door can be opened. The upper latch bolt is pivoted near its outside end so that, when released, it will fall into a withdrawn position by gravity, assisted by a wiping of a front face of the latch bolt by a retaining plate on the door frame. A blocker, pivoted on the inner side of the housing, holds the latch bolt in extended locked position by engagement with a downwardly facing shoulder on the inner side of the latch bolt. The upper actuating rod is linked to the blocker in such fashion that the blocker is swung out of blocking position when the actuating rod is lifted. When the actuating rod is released, the weight of the rod serves to urge the blocker toward blocking position. The upper latch bolts is returned from retracted position to extended position by a slide which is shifted transversely toward the latch bolt when the slide strikes a strike face, the slide then serving to push upon a projection on the upper latch bolt which tilts the latch bolt into the extended position, where it is blocked by the blocker until released. A lower latch bolt is also pulled to released position by upward movement of the lower actuating rod and held in released position as long as the upper latch bolt is held in released position. Also, the lower latch bolt is held in latched position as long as the upper latch bolt is held in latched position by the blocker.
Inventors
- 👤 Richard L Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:37
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/18; E05B63/20; E05B65/00; E05B65/10; E05B65/1006; E05B65/1013; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0822; Y10T292/1043; Y10T292/1075; Y10T292/1078; Y10T292/1083; Y10T292/1092
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
347 words
An exit lock device for a door which is vertically hinged in an outwardly swinging direction on a frame having an upper retaining means adjacent the top end of the door, said device comprising an upper latch housing on the door adjacent the top thereof, an upper latch bolt having a body with outward and inward sides and a mounting on a portion of the body thereof adjacent the outward side comprising a movable attachment between said upper latch bolt and the housing, a latching projection on the body located eccentric and inwardly with respect to said mounting, said latching projection being adapted to project above the upper end of the housing and having an outwardly facing section adapted to engage said upper retaining means whereby to hold the door in closed position, a downwardly facing shoulder on the inward side of said latch bolt, and a blocker having a mounting comprising a movable attachment between said blocker and said housing and having a blocking element thereon movable to a location in blocking engagement with said shoulder, and actuating rod means having a vertically reciprocable mounting relative to said housing, and a slide having a horizontally reciprocating mounting adjacent the top of the housing, said slide having a positive continuous engagement with said latch bolt in all positions of said latch bolt said slide in closed position of the door having a retracted position in engagement with a portion of said retaining means and with said latch bolt in a direction productive of retention of said latch bolt in upwardly projected position, said rod means being attached to said blocker at a location eccentric with respect to said attachment of the blocker on the housing and at a location adapted to move said blocker inwardly out of said blocking engagement upon movement upwardly of said rod means and movement outwardly of said door whereby to release said latch bolt for movement in response to pressure against said upper retaining means out of engagement with said upper retaining means and for movement of said slide to projecting position.
Claim 2
Dependent Claim
347 words
An exit lock device for a door which is vertically hinged in an outwardly swinging direction on a frame having an upper retaining means adjacent the top end of the door, said device comprising an upper latch housing on the door adjacent the top thereof, an upper latch bolt having a body with outward and inward sides and a mounting on a portion of the body thereof adjacent the outward side comprising a movable attachment between said upper latch bolt and the housing, a latching projection on the body located eccentric and inwardly with respect to said mounting, said latching projection being adapted to project above the upper end of the housing and having an outwardly facing section adapted to engage said upper retaining means whereby to hold the door in closed position, a downwardly facing shoulder on the inward side of said latch bolt, and a blocker having a mounting comprising a movable attachment between said blocker and said housing and having a blocking element thereon movable to a location in blocking engagement with said shoulder, and actuating rod means having a vertically reciprocable mounting relative to said housing, and a slide having a horizontally reciprocating mounting adjacent the top of the housing, said slide having a positive continuous engagement with said latch bolt in all positions of said latch bolt said slide in closed position of the door having a retracted position in engagement with a portion of said retaining means and with said latch bolt in a direction productive of retention of said latch bolt in upwardly projected position, said rod means being attached to said blocker at a location eccentric with respect to said attachment of the blocker on the housing and at a location adapted to move said blocker inwardly out of said blocking engagement upon movement upwardly of said rod means and movement outwardly of said door whereby to release said latch bolt for movement in response to pressure against said upper retaining means out of engagement with said upper retaining means and for movement of said slide to projecting position.
Claim 3
Dependent Claim
54 words
An exit device as in claim 1 wherein engagement of the outwardly facing section of the upper latch bolt with the upper retaining means is at a location rearwardly and upwardly of said movable mounting whereby pressure applied to said door in an outward direction assists in urging said latch bolt to unlatched position.
Claim 4
Dependent Claim
40 words
An exit lock device as in claim 1 wherein said attachments comprise spaced parallel pivotal mountings respectively for said latch bolt and said blocker, the pivotal mounting of the blockEr being inward relative to the mounting of said latch bolt.
Claim 5
Dependent Claim
111 words
An exit lock device as in claim 1 wherein there is a horizontally extending crossbar assembly, means mounting said crossbar assembly on the inward side of the door, an operating connection between said crossbar assembly and said actuating rod means acting in a direction such that crowd pressure against said crossbar assembly effects upward movement of said actuating rod means and a shifting of said blocker out of blocking engagement with said shoulder whereby when crowd pressure increases said pressure is translated to the outward side of the latch bolt, the actuating rod means and said blocker in a direction increasing the force applicable to move said blocker to unblocking position.
References Cited (Backward Citations)
US3124378A
Cited
US1585167A
Cited
US2911249A
Cited
US2887336A
Cited
US3083560A
Cited
US3214947A
Cited
US3319986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |