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    • 53. 发明专利
    • Improvements in or relating to liquid pressure remote control systems
    • GB560308A
    • 1944-03-29
    • GB1602642
    • 1942-11-12
    • AUTOMOTIVE PROD CO LTDJOHN KEITH SIMPSON
    • F15B7/10
    • 560,308. Hydraulic transmission of power. AUTOMOTIVE PRODUCTS CO., Ltd., and SIMPSON, J. K. Nov. 12, 1942, No. 16026. [Class 69 (ii)] In a liquid pressure remote control system comprising transmitting and receiving cylinders 12, 16 movement of the transmitting piston to the end of its stroke opens a valve 29 to connect the line to a pressure source 38, e.g. an accumulator or pump, whereby any leakage is made up and the motor piston is forced to the end of its travel. In the two-pipe system shown the opposite end of the transmitter is simultaneously connected to a reservoir 40. The valve is normally centralised by a spring 28 all connec - tions to the cylinder being closed until a projection 51 on the rod 13 engages abutments 49, 50 on the valve rod near the ends of the stroke. In a single pipe system the valve connects the system to a pressure source at. the end of the pressure stroke and to a reservoir at the end of the return stroke. Fig. 3 shows a system in which the transmitter and motor. pistons 93, 98 are hollow and form cylinders for secondary transmitter and motor pistons 94, 99 operable independently. The rods 95, 96 of the two transmitters actuate valves 103, 102 to connect their respective cylinder ends to a pressure source and to a reservoir when both transmitter pistons reach the same end of their strokes. The transmitter rods may be connected respectively to parts of a searchlight moving in planes at right angles, the motor rods being similarly connected to a second searchlight whereby the two lights move in unison. Alternatively the device might connect a machine gun &c. to a remote sighting device.
    • 55. 发明专利
    • Improvements in or relating to controlling systems operated by fluid pressure
    • GB541977A
    • 1941-12-19
    • GB1150040
    • 1940-07-10
    • AUTOMOTIVE PROD CO LTDJOHN KEITH SIMPSON
    • F15B9/12
    • 541,977. Fluid-pressure servomotors. AUTOMOTIVE PRODUCTS CO., Ltd., and SIMPSON, J. K. July 10, 1940, No. 11500. [Class 135 ] A fluid-pressure servomotor particularly adapted for operating engine throttles and other devices on aircraft has a follow-up control and has the power device permanently urged in one direction by the pressure of the motive fluid. In the form shown in Fig. 1 the power piston 12 is formed with a hollow piston rod 13 having a crosssectional area one half that of the piston and arranged to slide through a packing 15 in a detachable plug 14. A plug 38 secured to the piston rod by a pair of pins 18 has a bifurcated part 19, connected at 22 to the element to be operated and pivoted at 20 to a floating control lever 21. This lever is coupled by a link 29 with a valve spindle 24 fitted with stop collars 27, 28 and slidable through a packing 26 in a detachable plug 25. The spindle 24 carries a valve head 33 having a knife-edge seating on a frusto-conical seat 34 on a tubular exhaust valve slidable through a packed partition 53 and having a knife-edge seating on a frusto-conical seat 37. Supply pressure is permanently admitted to the smaller face of the piston. When the control 23 is moved towards the left the valve 33 is lifted from its seat against the action of a spring 42 to permit full supply pressure to act on the large face of the piston so moving it to the left. This movement acting through the floating lever recloses the valve with a pressure acting on the larger face of the piston equal to one half the supply pressure. Moving the control to the right opens the exhaust valve and so permits the pressure on the smaller side of the piston to move the piston to the right until such time as the exhaust valve is closed and a pressure built up on the larger side of the piston equal to one half the supply pressure. Both valves are pressure balanced and the power chamber pressure imparts a " feel " to the control. In a modification two pistons are employed rigidly connected by a tubular piston rod which passes through the ends of both cylinders. Pressure fluid constantly acts on one face of one piston while the opposite face of this piston and one face of the second piston are subject to inlet or exhaust pressure under the control of inter-connected inlet and exhaust valves seating one on the other and operated by a hand lever acting through a linkage mechanism including a floating lever. One hand lever may be used to control two such devices.
    • 57. 发明专利
    • Improvements in or relating to mechanism for producing angular movement for use in retractable under-carriages for aircraft
    • GB530373A
    • 1940-12-11
    • GB1361239
    • 1939-05-06
    • AUTOMOTIVE PROD CO LTDJOHN KEITH SIMPSON
    • B64C25/20
    • 530,373. Retractable undercarriages for aircraft. AUTOMOTIVE PRODUCTS CO., Ltd., and SIMPSON, J. K. May 6, 1939, Nos. 13612 and 14636. [Class 4] [Also in Groups XXIX and XXXI] A retractable mounting for a wheel on an aircraft comprises a tubular strut adapted to move angularly about a substantially horizontal pivot shaft in the aircraft wherein is coupled to a crank on the pivot shaft, the piston being moved axially within the tubular strut to move the latter bodily about its pivot. In one form a retractable leg for an aircraft undercarriage comprises a tubular member 34 secured in a sleeve 12 pivoted about a fixed transverse trunnion 18. The trunnion, which is a fluidtight fit in the sleeve 12, is divided and the two parts are connected together by pins 23, 24 on a diameter which is at an angle to the axis of the tube in its normal position. The lower part of the tube forms the shock absorber which is separated from the upper part by a partition 17. A piston 33 in the upper part is connected by a rod 31 to the pin 23, and an extension 35 of the piston works within a second piston 36 having an extension 37. A spring 41 between the pistons normally urges the extension 37 into engagement with a fixed notch 57. Upon admitting fluid through a port 49 in the trunnion to the space above the piston 36, the extension 37 is first withdrawn from the notch and then the two pistons move together and turn the leg into the position shown in chain lines in Fig. 2, to retract the undercarriage. By admitting fluid through a port 56 in the opposite end of the trunnion into the space between the piston 33 and the partition 17 the leg is again extended. By admitting fluid also to the annular space around the shock absorber plunger the leg may be shortened. In a modification a single piston having an extension for actuating locking pawls has a lost motion connection to the connecting rod. Upon admitting pressure fluid the first movement of the piston effects unlocking of the leg in either of its two positions. In another modification the upper part of the tube is closed and a piston connected to one of the crank pins by a link works in the upper end of the shock absorbing cylinder. Movement of the piston to raise the leg consequently compresses the resilient shock absorber and energy is stored for re-entering the leg. The last two modifications may be combined so that the fluid acts on both pistons during retraction of the leg. The leg may form part of a permanent jacking device on a motor car so that the jack when not in use occupies a horizontal position and automatically moves into a vertical position when pressure fluid is admitted. Sealing rings as described in Specification 474,055, [Group XXVI], may be used to render the working parts fluid tight.