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:
May. 03, 1983
Filed:
Nov. 17, 1980
Francis M Miller, Snyder, NY (US);
Conax Corporation, Buffalo, NY (US);
Abstract
Apparatus for sensing the electrical conductivity of field including a pair of electrodes and a capacitive type conductivity sensing circuit which in response to the electrodes being exposed to fluid of predetermined minimum conductivity under conditions involving a predetermined minimum rate of change of conductivity applies a gating voltage to the control terminal of a semiconductor device switching it into conduction to define a current flow path through a load. The load can be an ignition capacitor for an electro explosive device which, in turn, can be employed in a release mechanism for uncoupling a parachute canopy from its load upon landing in water. A semiconductor switch defines a discharge path for the ignition capacitor through the electro explosive device. A timing network connected to the ignition capacitor and semiconductor device and including a current regulating device and capacitor causes the semiconductor device to switch into conduction to define the discharge path to detonate the electro explosive device a predetermined time after initiation of charging of the ignition capacitor independent of the rate of charging of the ignition capacitor.