The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 1982
Filed:
Sep. 08, 1981
Zbigniew W Turlej, Mississauga, CA;
S.A. Armstrong Limited, Toronto, CA;
Abstract
A time responsive switching circuit for use with a single phase alternating current motor comprises a Triac in series with a start winding of the motor and controlled so as to disconnect the start winding after a predetermined time delay. The Triac is controlled by a timing circuit comprising a full wave rectifier bridge energized from the alternating current source, an RC charging network connected across the d.c. terminals of the bridge, a CMOS switching device responsive to the condition of the charging circuit, and an SCR controlled by the CMOS switching device. The SCR is switched off by the CMOS switching device after the chosen delay so as to remove the control potential from the Triac and so switch off the latter.