Locks – Operating mechanism – Key
Patent
1977-12-21
1979-04-10
Wolfe, Robert L.
Locks
Operating mechanism
Key
70419, E05B 2700
Patent
active
041482018
ABSTRACT:
A locking device is disclosed which comprises a multi-leaved key which is adapted to be inserted within a correspondingly configured keyhole provided within an inner cylinder member. The inner cylinder member is slidably disposed within an outer cylinder member so as to permit or prevent rotation of the inner cylinder member with respect to the outer cylinder member through the interaction between a projection member and a slot or groove respectively provided upon the inner and outer cylinder members, as well as to permit or prevent the inner cylinder member from being engaged with a cam member which is operatively associated wih a lock bolt. In this manner, the multi-leaved key must not only be inserted within the locking device, but after insertion thereof, the key must be pushed forwardly still further in order to move the inner cylinder member relative to the outer cylinder member so as to disengage the projection member from the slot, and to engage the inner cylinder member with the cam member, whereby rotation of the inner cylinder member and operation of the locking device to an unlocked condition may be accomplished. The key may or may not be withdrawn under such unlocked conditions, as desired and determined by the lock structure.
REFERENCES:
patent: 474783 (1892-05-01), Taylor
patent: 1641767 (1927-09-01), Ledin
patent: 1929658 (1933-10-01), Solliday
patent: 3251546 (1966-05-01), Rigo
patent: 3512382 (1970-05-01), Check
Miyamae Masuo
Miyamae Yasuo
Sanpo Lock Co., Ltd.
Wolfe Robert L.
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