Door locks and handles therefor

Claim 1

A door lock assembly of the type adapted to be used on doors where an outside handle is substantially flush with the other surface of the door, comprising casing means secured in an opening in the door, a latch bolt slidably mounted in said casing means and having a latching portion for projecting out of one end of the casing, a first resilient means biasing said latch bolt toward latched position, a pushbutton operator slidably mounted in the outer sidewall of the casing for movement in a direction at right angles to movement of the latch bolt, a second resilient means biasing said pushbutton operator outwardly toward retracted position, a slide member in said casing means mounted for movement parallel to said pushbutton operator, an eccentric internal projection on said pushbutton operator rotatable about an axis parallel to the direction of movement of said pushbutton operator, abutment means on said slide member adapted to be engaged by said projection during inward displacement of said pushbutton operator only in a predetermined rotate position of said projection, motion transmitting mechanism within the casing means inTerposed between said slide member and said latch bolt for translating inward displacement of said slide member by said pushbutton operator into amplified latch bolt retraction movement, and means extending through the inner side of said casing adapted to retract said latch bolt independently of operation of said button operator, said abutment means comprising a projection on said slide that is adjustable toward and away from the projection on said pushbutton to accommodate said assembly to doors of different thickness.