Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1976-04-26
1977-09-20
Schaefer, Robert K.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307141, 236 47, 337331, H02J 900
Patent
active
040499731
ABSTRACT:
A timer controlled space thermostat includes a timer, a rechargeable battery for providing the electrical power to operate the timer, circuit means for recharging the battery, and two single-pole, double-throw temperature responsive switches. One conductive position of each switch enables the energizing of space conditioning apparatus control means, the other conductive position of each switch enables the energizing of the recharging circuit means, and the short timer period incidental to the movement of the switch between the conductive positions provides a sufficient time to ensure de-energizing of the space conditioning apparatus control means prior to the energizing of the recharging circuit means.
REFERENCES:
patent: 3917165 (1975-11-01), Cross
patent: 3929284 (1975-12-01), Prewarski
patent: 3948441 (1976-04-01), Perkins
Becker, Sr. Paul A.
Emerson Electric Co.
Ginsburg Morris
Schaefer Robert K.
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