Closure fasteners – Bolts – Sliding
Patent
1987-09-21
1989-09-19
Gall, Lloyd A.
Closure fasteners
Bolts
Sliding
292167, 292193, 2923363, 292347, E05C 112
Patent
active
048674923
ABSTRACT:
The present invention is directed to an improved door latch assembly having a rotatable member which is transparent or translucent and to which a door knob structure is coupled. The member is rotatably mounted between a pair of support plates, and the member has a roller on the outer periphery thereof. A number of pivotally mounted links on one of the support plates operates to move a latch bolt into its retracted position when the roller moves in either direction under the influence of the rotation of the member by turning a door knob element of the door structure. The various links cooperate with each other to cause immediate movement of the latch bolt upon rotation of the member, yet the links are not visible from a position exteriorly of the door in which the latch assembly is mounted. Thus, one viewing the door and the panel member cannot discern how the door latch operates because the links are effectively concealed in the door and the only viewable parts of the assembly are the member, the plates and the door knob structure coupled to the member. An apparatus for cutting a mortise in a door is also disclosed.
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Edmondson Peter C.
Kairis John T.
Brueske Curtis B.
Edmondson Peter C.
Gall Lloyd A.
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