Patent ID: 7362231

Claim:
A hand pressure sensor warning device for use with hand held objects including sports devices, steering devices, writing devices, and computer interface devices, and for generating an alarm signal when the hand or finger pressure being applied to said warning device exceeds a threshold value, said device comprising: a normally open electrical membrane switch having a first and a second membrane layer, each membrane layer having electrical contact areas including electrically conductive material; an electrical indicator electrically connected to said electrical membrane switch and having a power supply; an alarm signal device electrically connected to said electrical indicator for generating an alarm signal; and a housing to enclose said electrical membrane switch, said electrical indicator, and said alarm signal device, a portion of said housing lying in close contact with the membrane switch, whereby the alarm signal device generates an alarm signal when the membrane switch is closed by means of hand or finger pressure applied to the portion of said housing which lies in close contact with said membrane switch, the first membrane layer of said normally open electrical membrane switch including first electrical contact areas and second electrical contact areas which are electrically interconnected to said electrical indicator and separated from one another so as to establish an open electrical switch circuit, and the second membrane layer of said normally open electrical membrane switch including third electrical contact areas which are aligned to engage said first and second electrical contact areas to close the open electrical switch circuit therebetween when the hand or finger pressure applied to the normally open electrical membrane switch which exceeds said threshold value, wherein said first electrical contact areas of the first membrane layer of said normally open membrane switch comprise a first electrical conductor extending from said electrical indicator and a first set of spaced, parallel aligned conductor strips, and said second electrical contact areas of the first membrane layer comprise a second electrical conductor extending from said electrical indicator and a second set of spaced, parallel aligned conductor strips, the first set of conductor strips of said first electrical contact areas being interspersed between the second set of conductor strips of said second electrical contact areas.