SAFETY DEVICE FOR USE WITH AUTOMATIC AUTOMOBILE WINDOW REGULATOR

• US 3,651,389 A
• Filed: 11/03/1969
• Issued: 03/21/1972
• Est. Priority Date: 11/09/1968
• Status: Expired due to Term

• Current Assignee: Hiroshi Arai, Shigehiko Ito
• Original Assignee: Hiroshi Arai, Shigehiko Ito
• Inventors: Ito, Shigehiko, Arai, Hiroshi
• Primary Examiner(s): Rubinson, Gene Z.
• Assistant Examiner(s): Duncanson, Jr., W. E.
• Application Number:
  US04/873,320
• Time in Patent Office: 869 Days
• Field of Search: 318/266,286,466,478 317/123P 340/258 200/DIG.1
• US Class Current: 318/266
• CPC Class Codes: E05F 15/46 responsive to changes in electrical capacitance
• CPC Class Codes: E05Y 2900/55 Windows
• CPC Class Codes: H02P 7/03 for controlling the direction of rotation of DC motors

Abstract

A safe automatic window regulator so designed that if the human body and the like touches the upper end of the window glass, it is sensed so that even if the switch has been closed in the direction to close the window, the electric circuit is automatically changed over so as to reopen the window thereby preventing harm to the human body and the like due to any inadvertency.

Claims

2. A safety device as in claim 1, wherein said emitter bias resistors are connected between the emitter of said transistor and ground, said oscillation coil means comprising a first oscillation coil connected to the collector of said transistor and a second oscillation coil connected to the base of said transistor, and wherein a coupling capacitor is connected between said electrode and the base of said oscillating transistor.

3. A safety device as in claim 2, wherein said oscillation circuit further comprises a DC blocking capacitor connected in series with second oscillation coil, and a resistor connected between the base of said transistor and said power source.

4. A safety device for use with an automatic automobile window regulator having a power source, a window regulator motor, and a manual switch for changing the direction of said motor to open or close a window glass, comprising:

eleCtrode detecting means adapted to be mounted on said window glass for signalling the presence of an adjacent human object by changing its stray impedance, a transistorized oscillator circuit electrically connected to said electrode and coil structured to change its normal operation into an abnormal operating condition when and only while the stray impedance of said electrode means changes as aforesaid, and means connected to said oscillator circuit and responsive only to said abnormal condition for automatically reversing said motor to cause said glass to move in an opening direction while said manual switch is in a position normally to cause closing of the glass so as to prevent said human object from being caught by closing glass, said reversing means being also responsive immediately upon cessation of said abnormal condition and return of said oscillator circuit to its said normal operation due to sufficient removal of said human object from said electrode detecting means to effect automatic re-reversing of said motor so that said window glass resumes its movement in the closing direction while the said manual switch remains in its said normal closing position.

5. A safety device as in claim 4 wherein said oscillator abnormal operating condition is a non-oscillating condition and said electrode detecting means is a conductor foil adapted to mount on the closing edge of said window glass.