Lock mechanism
AssigneeNCR Corporation
InventorsTakao Kawamoto, Nobuyoshi Mizuno, Akira Ota
Life of this patent
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Abstract
A locking mechanism of the cylinder type for a business machine wherein four different keys can be accommodated in a single lock to perform various functions or modes of operation. The mechanism includes ring members and locking pins operably associated with the cylinder and with the lock body either to permit or to restrict rotational movement thereof with respect to the ring members. Rotation of a key in the cylinder to a predetermined limit sets up a switching arrangement to provide a signal for each mode of operation desired to be accomplished.
Claims15
A lock mechanism comprising a body portion, a cylinder received in said body portion and having a key slot defined therethrough, at least
- two rings each being rotatably arranged between said body portion and said cylinder,
- a plurality of locking pins positioned to cause said rings to engage with said body portion or with said cylinder by reason of a selected key being inserted into said key slot and rotated therein,
- means for limiting the angular rotation of each ring in relation to said body portion and/or said cylinder, and means connected to said cylinder for developing a signal responsive to rotation of said selected key.
Mechanism for permitting selected function operations comprising
- a body portion,
- a cylinder rotatable in said body portion and having a key slot therein for receiving any one of a plurality of keys,
- means rotatably positioned between said body portion and said cylinder, each of said keys being operable to engage said rotatable means with either said body portion or with said cylinder,
- means for limiting said rotatable means in relation to said body portion or with said cylinder, and
- means connected with said cylinder for developing signal means for the selected function.
Dependencies are inferred from the claim text.