Motor starting and protecting apparatus

Details Motor starting and protecting apparatus Motor starting and protecting apparatus

1978-08-15

1983-08-30

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 24, 361 31, 361106, 318783, 318785, 318788, 318791, 338220, 337100, 337102, 310 68C, H02H 7085

Patent

active

RE0313670

ABSTRACT:
A combination starting and protecting device particularly useful with split phase motors such as those used with refrigeration compressors is disclosed in which an element of material having a positive temperature coefficient (PTC) of resistivity characteristic and a thermally responsive switch are disposed in the same housing. A thermal coupling of a preselected value between the PTC element and the thermally responsive switch is provided so that a desired reset or "off" time is obtained for the thermally responsive switch without affecting the "on" time.

REFERENCES:
patent: 3521138 (1970-07-01), Enemark et al.
patent: 3695054 (1972-10-01), Barry
patent: 3858140 (1974-12-01), Hancock
patent: 3921117 (1975-11-01), Blaha
patent: 3965392 (1976-06-01), Moorhead et al.
patent: 4037316 (1977-07-01), Stoll
patent: 4042860 (1977-08-01), Woods et al.
patent: 4084202 (1978-04-01), Stoll
patent: 4086558 (1978-04-01), Pejouhy et al.

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