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US 4,903,294 AGranted
Low voltage operated coin relay
AssigneePalco Telecom Inc.
InventorsGary Grantland, Attle D. Johnson
Life of this patent
Estimating the term…
Abstract
A coin relay adapted for use with an associated coin hopper mechanism particularly adapted for use in a microcomputer based deregulated paystation. The relay requires only minimum voltages to operate with the associated coin relay operate and release timing controlled by an assoicated microcomputer.
Claims9
A relay for use in a coin operated telephone paystation operable to control an associated coin hopper mechanism to collect, or in the alternative, to refund coins deposited in said telephone paystation, said relay including a coil, a core and an armature, the improvement comprising:
- a control circuit including circuit connections to said coil, operated to conduct operating current over said connections to said coil, to operate said armature to move in a direction toward said core;
- and a shield of non-magnetic metallic material located between said core and said armature effective to reduce the force required to restore said relay to a non-operated mode by reducing said current required to operate said relay, said shield further operated to reduce the release time of said relay.
Dependencies are inferred from the claim text.