Patent GB-560456-A (GB)
Title: Improvements relating to window, door or like systems for motor vehicles
IPC: E05F15/04
Filed: 1942-07-13
Abstract: 560,456. Valves. TRICO PRODUCTS CORPORATION. July 13, 1942, No. 9726. Convention date, Aug. 28, 1941. [Class 135] A control valve for fluid pressure motors for opening and closing the windows and doors of motor vehicles comprises a casing with spaced valve chambers each with opposed atmospheric and pressure. or suction ports, a valve in each chamber movable from one port to the other normally held in position to close one port in each chamber and common actuating means whereby either valve may be moved to open the normally closed port and close the other port. Fig. 1 shows a control system for controlling a series of double-acting oscillating pneumatic cylinders 4 acting through bellcranks to raise and lower the windows of a four-seater motor car. Each of the rear windows has a local control valve 12 on the door and is also under the control of a control valve 13 on the dash board. The front passenger window is controlled from the dashboard alone while the driver's window is controlled by a remotely actuated valve on the door. Fig. 2 shows one of the dashboard control valves. In this form passages 10<1> 11<1> connected to a local control valve or to a power cylinder on the front passenger's door lead to two valve chambers 17 formed with opposed valve seats 16, 18 leading respectively to a conduit 14 coupled to a source of operating pressure and to chambers 45 connected to atmosphere through a filter. The valve members comprise cylindrical plugs adapted to seat in flat seats about the ports 16, 18 and also in the cylindrical surrounding walls. The spacing between the cylindrical parts of the seats is slightly less than the axial length of the valve members so that in an intermediate position both ports are closed. A rod 20 secured to one valve slidably engages a socket 21 in the other valve and a spring 22 normally holds the valves in the positions to close the atmospheric ports. An actuating knob 23 slidably mounted on a plate 24 has two pins 25 engaging slots 26 in actuating members 27 bent over at their outer ends to engage the spindles of the valves. In the mid-position of the knob both ends of the power cylinder are subject to pressure or suction. Movement of the knob in one direction or the other moves one valve to close the pressure port and open the atmospheric port to cause a pressure differential in the power cylinder. In a modification the cylindrical valves are replaced by a pair of opposed cup leathers held by the spring 22 against a distance piece. Fig. 5 shows one of the door control valves. In this form conduits 10, 11 leading to valve chambers 36 are connected to the power cylinder, the ' conduits 10<1>, 11<1> to a dash-board control valve and the central chamber to atmosphere through a filter 34. The oppositely seating valves have sockets slidably engaging pins 39 fixed to closing plugs 40. A pin 43 secured to a sliding button similar to the knob 23 is arranged between the valve spindles 42 so that movement in one direction or the other moves one of the valves against the action of a loading spring 41 to close the pressure port and open the atmospheric port. ,