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:
Jul. 18, 1989
Filed:
Apr. 04, 1988
Applicant:
Inventors:
Louis P Farace, Mesa, AZ (US);
Monty W Bai, Scottsdale, AZ (US);
Jerry R Whittaker, Scottsdale, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F42C / ;
U.S. Cl.
CPC ...
102221 ;
Abstract
A turns-to-arm sensor which uses a piezoelectric crystal to produce a current flow dependent upon the spin rate of a projectile. An output voltage is produced across a diode, from said current, which is proportional to the square root of the voltage at the crystal. The output voltage is approximately equal to the angular velocity of the projectile and is converted to frequency. The frequency determines the rate at which a preset counter operates. At time-out of the counter an arming signal is sent.