Locks – Operating mechanism – Key
Patent
1989-11-13
1990-11-06
Smith, Gary L.
Locks
Operating mechanism
Key
70387, E05B 2700
Patent
active
049675788
ABSTRACT:
A sleeve-type latch bolt mechanism includes: a cylindrical body with an annular member and a check block formed at one end, a round keyhole in the middle, a plurality of vertical grooves and slots positioned along the cylindrical body in communication with the round keyhole; a latch device composed of a plurality of front and rear latch members, each with a reference slot and a plurality of dummy slots in one side and a check piece in another side, respectively, disposed in the vertical grooves of the cylindrical body with the check pieces extending into the round keyhole; a plurality of different circular positioning members each with a plurality of check lugs separately disposed around the cylindrical body; a front and a rear sleeve member installed around the outside of the cylindrical body and engaged with the circular positioning members; and a cylindrical-stem key having a stem provided with a plurality of different slots or step-type strips therearound in conjunction with the locations of the check pieces of the latch members, for being inserted into the keyhole of the cylindrical body for performing unlocking and locking operations therewith.
REFERENCES:
patent: 2036738 (1936-04-01), Zygmunt
patent: 2391834 (1945-12-01), Johnstone
patent: 2424514 (1947-07-01), Sterner
patent: 3817066 (1974-06-01), Pearson
Sheu Yig-Chip
Way Sheen-An
Dino Suzanne L.
Smith Gary L.
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