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. 19, 2016
Filed:
Nov. 10, 2014
Kidde Technologies, Inc., Wilson, NC (US);
Steven Wallace, Raleigh, NC (US);
David Frasure, Wilson, NC (US);
Mahamadou Yamoussa, Raleigh, NC (US);
KIDDE TECHNOLOGIES, INC., Wilson, NC (US);
Abstract
A pneumatic pressure detector for a fire alarm system includes a housing having an internal surface defining an interior volume. Also included is an alarm switch located within the interior volume of the housing and comprising a first deformable diaphragm responsive to an increase in pressure of a gas disposed in a sensor tube to indicate an overheat condition. Further included is an integrity switch located within the interior volume and comprising a second deformable diaphragm disposed in contact with an electrical contact during pressurization of the gas within a predetermined pressure range and in an electrically open condition when the pressure of the gas is less than the predetermined range. Yet further included is a mica sleeve located within the interior volume of the housing and disposed along at least a portion of the internal surface of the housing to insulate the alarm switch and the integrity switch.