Safety latch for in swinging doors

Details Safety latch for in swinging doors Safety latch for in swinging doors

1981-02-23

1983-10-11

Moore, Richard E.

Closure fasteners

Extension link

Slotted bar

292 68, E05C 1716

Patent

active

044087896

ABSTRACT:
A safety latch is disclosed capable of selectively locking an in swinging door in a closed position, permitting the door to open a predetermined angular displacement, or permitting the door to open freely. The latch includes a bracket with a projecting portion offset from the door, and a pivotable bar capable of limited vertical displacement, and having a slot with a long first portion of predetermined width abruptly expanding to a short second portion of greater width. The projecting portion is capable of selectively engaging the pivotable bar in either the first or second portion of the slot.

REFERENCES:
patent: 189822 (1877-04-01), Whipple
patent: 236910 (1881-01-01), Phillips
patent: 473785 (1892-04-01), Samuel
patent: 1071461 (1913-08-01), Poston
patent: 1336430 (1920-04-01), Gustafson
patent: 1548744 (1925-08-01), Pratt
patent: 1722736 (1929-07-01), Derbyshire
patent: 2442733 (1948-06-01), Schultz

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