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:
Apr. 01, 1997
Filed:
Feb. 13, 1995
Stanley J Nacewicz, Plainville, MA (US);
Stephen P Geishecker, East Walpole, MA (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A starting circuit for use with single phase induction motors such as capacitor run and capacitor start, capacitor run motors is shown having a triggerable semiconductor (Q1, Q2 and Q3) serially connected to the auxiliary winding (AW) across the power supply (L1, L2). A resistor (RA) is serially connected at (J1) to the main winding (MW) to form a voltage divider to aid in providing triggering current to the triggerable semiconductor. A thermistor (PTC) is connected between the gate and the voltage divider junction (J1). The triggerabIe semiconductor is shown as a triac (Q1) in certain embodiments and as back to back SCRs (Q2 and Q3) in other embodiments. In high current motors the voltage divider resistor (RA) is shown thermally coupled to the thermistor (PTC).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile