Closure fasteners – Bolts – Multiple
Patent
1992-02-06
1992-10-13
Nicholson, Eric K.
Closure fasteners
Bolts
Multiple
292DIG60, 292 92, E05C 112
Patent
active
051544547
ABSTRACT:
A concealed exit device for mounting vertically within a door to cooperate with a threshold latch plate and an overhead latch plate in a door opening for latching and unlatching the door within the door opening. The concealed exit device includes a manually actuated member for mounting in a central portion of the door for manual movement from one side of the door between a normally biased position and an actuated position, upper and lower latching mechanisms for mounting in upper and lower ends of the door for movement between extended latched positions in cooperating latched relation with the overhead and threshold latch plates respectively and retracted unlatched positions out of cooperating relation with the latch plates. The device further includes a motion-transmitting mechanism between the centrally located manual actuating member and the end located upper and lower latching mechanisms for effecting movement of the latching mechanisms from the extended latched positions thereof into the retracted unlatched positions thereof in response to the manual movement of the manual actuating member. The motion-transmitting mechanism includes an upper elongated motion-transmitting member a lower elongated motion-transmitting member, and an adjusting mechanism for adjusting the operative vertical extent of the upper and lower motion-transmitting members to accommodate the vertical extent of the door. The adjusting mechanism can be accessed through cover member while the device is in operating condition.
REFERENCES:
patent: 1033151 (1912-07-01), Butler
patent: 1721489 (1929-07-01), Prinzler
patent: 2887336 (1959-05-01), Meyer
patent: 3583740 (1971-06-01), Armstrong
patent: 3660940 (1972-05-01), Tavano
patent: 4368905 (1983-01-01), Hirschbein
patent: 4601499 (1986-07-01), Kim
patent: 4881765 (1989-11-01), Heid
patent: 5042851 (1991-08-01), Hunt
Monarch Hardwire & Mfg. Co., Inc.
Nicholson Eric K.
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