Abstract A pressure sensitive electronic switching device comprised of a flexible tubular member having a pair of electrical conductors spaced apart in the tube. The conductors are connected at one end to an electric circuit having a source of electrical power. A powdered semi conducting material occupies the space in the tube between the conductors. When a force is applied against the tube moving one conductor toward the other the powdered material is compressed. Before being compressed the material has a high resistance to the flow of electric current between the conductors. As the material is compressed the resistance to the flow of current decreases. When the current flow reaches a predetermined value a relay or other current sensitive device in the electric circuit connected to the conductors is actuated.
A device as defined in claim 1 in which the device is positioned at the inside of the window when said window is in closed position.
Claim 2
Dependent Claim
30 words
A device as defined in claim 2 in which aid current actuated device is a relay, and a switch actuated by said relay connected to control operation of said motor.
Claim 3
Dependent Claim
34 words
A device as defined in claim 3 in which said switch is a reversing switch operable upon actuation of said relay to reverse said motor and to move said window in an opening direction.
Claim 4
Dependent Claim
174 words
A vehicle window movable across a window opening and having a reversible electric motor operatively connected thereto to open and close said window, an elongated pressure responsive switching device operable by pressure applied to said device anywhere along its length, said device extending across the top of the window opening in position at the side of the window in closed position such that the upper edge of the window normally moves past the elongated device in closing and such that an article interposed in the window opening between the upper edge of the window and said elongated device is engaged by the upper edge of said window and is moved thereby to apply force to a portion of said elongated device, switch means operatively connected to said motor, a relay connected to said switch means, means connecting said elongated device to said relay and operable upon application of a predetermined pressure anywhere along the length of said elongated device to actuate said relay to stop said motor to terminate closing movement of said window.
Claim 5
Dependent Claim
28 words
Structure as defined in claim 5 in which said elongated device comprises a flexible laterally compressible tube, and conductors extending longitudinally within said tube at opposite sides thereof.
Claim 6
Dependent Claim
20 words
Structure as defined in claim 6 in which said elongated device is located at the inside of the window opening.
Claim 7
Dependent Claim
40 words
Structure as defined in claim 6 in which said switch means is a reversing switch operable by said relay to revErse said motor upon application of a predetermined pressure to said tube to move said window in an opening direction.