Latch bolt locking mechanism for fire door locksets

Details Latch bolt locking mechanism for fire door locksets Latch bolt locking mechanism for fire door locksets

1978-08-28

1980-01-15

Moore, Richard E.

Closure fasteners

Bolts

Sliding

292150, 292DIG66, E05C 100, E05C 1302

Patent

active

041835654

ABSTRACT:
To lock the head of a latchbolt in extended, or locked position therein to prevent opening of a door in case of fire the latch bolt head is provided with a spring driven locking pin reciprocatably mounted in a transverse direction. In the extended locked position of the latch bolt head the locking pin is in alignment with but withdrawn clear of a hole in the latch bolt case. At the inside end of the locking pin is a groove and a fusible pin normally engages the groove holding the locking pin in withdrawn position. This permits normal latch bolt action. When the fusible pin melts because of heat from a fire the locking pin is released and driven by spring action into the hole in the latch bolt case to physically bar withdrawal of the latch bolt, and consequent opening of the door.

REFERENCES:
patent: 1520509 (1924-12-01), Rancour
patent: 1541093 (1925-06-01), Amico
patent: 1617813 (1927-02-01), Judge
patent: 3026703 (1962-03-01), Welch
patent: 3705739 (1972-12-01), Adler
patent: 4012066 (1977-03-01), Salvatore

Affiliated with

Also associated with

Rating

Latch bolt locking mechanism for fire door locksets does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Latch bolt locking mechanism for fire door locksets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Latch bolt locking mechanism for fire door locksets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1025686