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:
Feb. 17, 1976
Filed:
May. 09, 1974
Applicant:
Inventors:
Dwain Aidala, Marlboro, MA (US);
Albert W Welz, Jr, Westford, MA (US);
Assignee:
Arthur D. Little, Inc., Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ; H01H / ;
U.S. Cl.
CPC ...
307141 ; 328 48 ; 328129 ;
Abstract
An electronic timer switch adapted for installation in a standard switch receptacle and operative in response to applied AC power to provide a manually selectable operative duration. The timer switch is manually actuable to select an intended time interval and employs electronic circuitry for counting pulses derived from the input power frequency and to cause activation of a power switch during the selected interval. The switch can include indicators denoting selected and remaining time intervals and can include circuitry providing a warning indication of the approaching end of a selected interval.