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. 25, 1976
Filed:
Jan. 23, 1974
Applicant:
Inventor:
James D Heckelman, Norwalk, OH (US);
Assignee:
Research Energy of Ohio, Inc., Cadiz, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307268 ; 307296 ; 3072 / ; 328 63 ;
Abstract
A blasting machine comprising a pulse generator which delivers its pulses to a control signal transmitting circuit that in turn delivers the pulses to driven blast initiating circuitry. The control signal transmitting circuit includes an electronic switch which is not only turned on and off by the pulse generator but is also turned off by a deactivating circuit when the voltage of a power supply for the machine is below a predetermined level. When the voltage of the power supply is above this predetermined level, the deactivating circuit is made inoperative so that it can no longer turn off the electronic switch.