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:
Nov. 03, 1981
Filed:
Apr. 30, 1979
Marvin H Weintraub, West Bloomfield, MI (US);
Fred Oblinger, Livonia, MI (US);
Other;
Abstract
A resistive controller suitable for sensing a variable electrical resistance indicative of a characteristic of a substance and for connecting an external electrical device to a source of electrical power when the measured electrical resistance reaches a predetermined level. The resistive controller includes a timer circuit which is activated when the measured electrical resistance reaches the predetermined value and which, in one embodiment, provides an adjustable time period, upon the expiration of which, the external electrical device is disconnected from the source of electrical power. In another embodiment, the timer circuit provides an adjustable time period, upon the expiration of which, the external electrical device is connected to the source of electrical power.