Invention Grant
- Patent Title: Tilt switch employing graphite
- Patent Title (中): 倾斜开关采用石墨
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Application No.: US12392212Application Date: 2009-02-25
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Publication No.: US07934321B2Publication Date: 2011-05-03
- Inventor: Michael David Johnson , Robert Louis Clark, Jr.
- Applicant: Michael David Johnson , Robert Louis Clark, Jr.
- Applicant Address: US TX Friendswood
- Assignee: Egresson, LLC
- Current Assignee: Egresson, LLC
- Current Assignee Address: US TX Friendswood
- Agency: Hulsey, P.C.
- Agent William N. Hulsey, III; Loren T. Smith
- Main IPC: G01C9/06
- IPC: G01C9/06 ; H01H35/02

Abstract:
The invention relates to a form of a tilt switch that solves the problem of poor electrical contact, excessive/unpredictable hysteresis, high contact resistance, short life and/or electrical bounce. The tilt switch uses conventional ball-in-tube construction and adds a graphite powder film to all electrically conductive surfaces in the switch. This non-mercury tilt switch provides additional features such as enhanced electrical contact, reduced or eliminated hysteresis, lowered contact resistance, increased contact life and eliminates electrical bounce.
Public/Granted literature
- US20090223787A1 TILT SWITCH EMPLOYING GRAPHITE Public/Granted day:2009-09-10
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