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. 06, 1986
Filed:
Apr. 18, 1984
Kosuke Miki, Sagamihara, JP;
Shiro Hiruta, Tokyo, JP;
Abstract
An electronic delay detonator actuated after the lapse of a predetermined delay time from the application of an input power source, comprises a capacitor for storing the electrical energy supplied from the input power source, a diode bridge for preventing the stored electrical energy from being released reversely toward the input power source, a CR oscillator, a counter for generating a signal upon having counted a pulse signal produced from the CR oscillator by a predetermined number, and a thyristor driven by the signal for supplying the electrical energy stored in the capacitor to an ignition device in the detonator, the delay time being accurately determined by counting the pulses generated from the CR oscillator.