Switches and circuits for solenoid control
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 2, 1999
Grant Date -
N/A
app pub date -
May 26, 1998
filing date -
May 26, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Switching systems are provided for fail-secure and fail-safe solenoid operated locks, and are designed to maintain the solenoid cool during activation during normal operation when the solenoid is continuously supplied with current. The switching system comprises a dual action switch with electrical contacts providing for momentary high electric power during initial activation of the solenoid operated lock, and also providing a low power continuous current to maintain the solenoid cool during continuous activation. The switching system comprises a push-on, push-off switch, and a normally-open switch connected in series with a transformer and the solenoid operated lock, to provide a high electrical power to the solenoid when both switches are closed. A resistor is connected in parallel with the normally-open switch, such that when the normally-open switch is opened, a low power maintenance current is supplied through the resistor to maintain the solenoid activated with low power to maintain the solenoid cool during continuous activation.
First Claim
Other Claims data not available