Communications: electrical – Continuously variable indicating – With meter reading
Patent
1986-03-21
1988-12-06
Caldwell, Sr., John W.
Communications: electrical
Continuously variable indicating
With meter reading
3408253, 70278, 361172, 235382, H04Q 100, G06K 1906, E05B 4706
Patent
active
047898593
ABSTRACT:
An electronic locking system including a lock cylinder having an electronically actuable release assembly which is selectively enabled to disengage a pin from a cylinder plug, to permit the rotation of the plug by an inserted key. The lock cylinder and key each contain non-volatile, electronically alterable memory devices, such as EEPROM integrated circuits, which house keying system codes. The key EEPROM is preferably housed within the key blade, in a key design which closely resembles a traditional mechanical key. The release mechanism incorporates a locking pin which is moveable between plug-engaging and non-engaging positions, along a radius of the lock cylinder. The release mechanism may include a primary actuator which directly moves the locking pin, or may act indirectly upon the locking pin via a latching member.
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Clarkson Bruce A.
Frere Ronald J.
Loughlin Thomas G.
Mongeau Peter
Taylor, Jr. William W.
Caldwell Sr. John W.
Deutsch Barry E.
Emhart Industries Inc.
Holloway III Edwin C.
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