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. 21, 1998
Filed:
Nov. 08, 1995
Harry Powell, Shipman, VA (US);
Ken DeWitt, Phoenix, MD (US);
Designtech International Inc., Springfield, VA (US);
Abstract
In a vehicle alarm system, as one feature circuitry is provided which can be attached to detect an input from a door pin input switch, and which can detect the opening and closing of the door if the door pin input switch is either a positively triggered pin switch or a negatively triggered pin switch. Furthermore, a specific structure of a piezoelectric disk sensor and detecting circuitry associated therewith is provided. The piezoelectric disk sensor has a weight mounted off a central axis at a distance of approximately a radius of the piezoelectric disk from a rigid mounting area. The associated circuitry evaluates all information from a shock sensing signal detected by the piezoelectric disk sensor.