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    • 2. 发明专利
    • Improvements in or relating to alternating current power sources
    • GB824126A
    • 1959-11-25
    • GB2642756
    • 1956-08-29
    • JOHN FREDERICK WOOD
    • H01L41/113H02K35/06
    • 824,126. Electrostatic generators; reciprocating generators; rectifying. WOOD, J. F. Aug. 29, 1956 [Aug. 31, 1955], No. 26427/56. Classes 35 and 38 (2). [Also in Group XL (c)] A vibrating A.C. generator consists of a flexible arm 28 actuating a " bender " type piezoelectric crystal 16 or electromagnetic generator, the arm being set in natural oscillation by a pivoted tooth 44 on a manuallyoperated, spring - returned plunger 42. As shown, conductive coatings 22, 24 on a crystal 16 feed a signalling circuit through a rectifier 68, this circuit consisting of an oscillating transistor 14 feeding an aerial 78. If a steady signal is desired a condenser 80 may be inserted. A modification is described in which the crystal comprises two crystals stuck together and feeding separate rectifiers to give effective fullwave rectification. In a further modification, Fig. 4, the crystal is replaced by an electromagnetic generator consisting of a permanentmagnet 154 having poles 156, 158 and a coil 162 surrounding the spring 176. As shown, the generator feeds a radiation measuring circuit comprising a counting chamber 190, audible signal set 196 and voltage regulating tube 208 fed through a voltage multiplier 198, 200, 202, 204. The crystal may be twisted instead of bent.
    • 3. 发明专利
    • Improvements in the operation of photographic camera shutters
    • GB573007A
    • 1945-11-01
    • GB1361543
    • 1943-08-20
    • ALBERT FREDERICK WOODCELESTION LTD
    • G03B9/58
    • 573,007. Photographic shutters. WOOD, A. F., and CELESTION, Ltd. Aug. 20, 1943, No. 13615. [Class 98 (i)] A photographic camera shutter is positively driven through its film- or plate-exposing position by a synchronous electric motor operated from alternating current mains to provide a known or predetermined relationship between the duration of exposure of the film or plate and the frequency of the current. As shown, the shutter comprises an apertured disc D and a blade member. The disc is mounted on a spindle and is geared by gearing G to the motor and on rotation the aperture A passes across the exposure aperture of the camera. The pivoted blade member is partly under control of the disc or motor and partly under the control of the operator so that it may be swung to make an exposure. A cam C associated with or geared to the disc D and contacts Cm1 are arranged so that prior to the passage of the aperture through exposure position a point in the circuit 1 is closed, and that shortly after such passage the point is again broken. The circuit 1 includes an electromagnet M, a source S of electrical energy, e.g. the secondary winding of transformer T, and contacts Co1 under control of the operator. The electromagnet M controls an armature on the pivoted blade member. A second circuit 2 includes the source S, an electromagnet R, contacts Cm2 controlled by the cam C and contacts Co2 controlled by the operator. When operated by closure of contacts Cm2 by cam C, the electromagnet R opens the contacts r1 in circuit 1 and closes contacts r2 to provide a holding circuit independent of the cam-operated contacts and dependent on the operator-controlled contacts Co2. To prevent exposure during movement of the film or plate from a position in which one area has been exposed to a position in which another area is to be exposed, the contacts Crll are opened as soon as the film or plate-moving mechanism is operated. The lamp L3 indicates that an exposure has been made and the lamp L1 that the motor is in operation. The circuit of L3 is controlled by electromagnet M through armature m3. In a modification, the aperture A effects the exposure, and the gearing is such that the time of movement of aperture A across the exposure aperture is appropriate. The selfstarting synchronous motor-operating disc D is only operative at the will of the operator. The disc D may be of conducting material with an insulating portion I, and co-operates with contacts Cm1 so that in the normal position of the disc, circuit 3 is open. Shortly after movement of disc D from its normal position, circuit 3 is closed until the disc makes a complete revolution. The circuit 1 includes operatorcontrolled contacts Co1 which, when closed, operate relay R to close contacts r2 in circuit 2 to connect the self-starting synchronous motor SM to the source of power. Movement of the disc D closes an alternative circuit for motor SM to ensure completion of a revolution for disc D. Cam-operated contacts may be provided to prevent exposure during movement of the film or plate. A number of cameras may have shutters of the type described, the gearing being such that the time of exposure in any one camera is the same at that in any other.
    • 7. 发明专利
    • Improvements relating to ball and roller bearings
    • GB383425A
    • 1932-11-17
    • GB8229731
    • 1931-11-21
    • BRITISH TIMKEN LTDFREDERICK WOOD
    • F16C33/66
    • 383,425. Retaining lubricant in bearings. BRITISH TIMKEN, Ltd. and WOOD, F., Cheston Road, Aston, Birming- ham. Nov. 21, 1931, No. 32297. [Classes 12 (i) and 12 (ii).] A bearing housing has an oil overflow passage and also, in its upper part, an air vent communicating with the overflow passage. In the form shown, the inner part 7 of a two-part housing 6, 7 such as that described in Specification 367,164 is formed with an annular groove 18 closed by the outer member and communicating with the air in the upper part of the housing by apertures 22 and with the oil in the lower part by apertures 23, an overflow passage 24 being connected to the groove 18 at a convenient height. The groove 18 is interrupted at the top by a solid portion (not shown) having a filling-hole drilled therein. The arrangement permits the air in the bearing housing, upon heating up, to escape through the aperture 22 and passage 24 instead of allowing it to force oil out of the bearing.
    • 9. 发明专利
    • Improvements in or relating to frames and steering means for motor cycles and like vehicles
    • GB327404A
    • 1930-04-02
    • GB14029
    • 1929-01-02
    • FREDERICK JOHN OSBORNNORMAN FREDERICK WOOD
    • B62K25/24
    • 327,404. Osborn, F. J., and Wood, N. F. Jan. 2, 1929. Steering-mechanism.-A motor-cycle &c. frame having steering-mechanism comprising a pair of link structures pivoted to the frame and to the wheel-carrying member, for example, as described in Specification 284,118, is provided with a rigid wheel-carrying member, which bridges the wheel and spaces the outer ends of the link structures, and which is adapted to slide against springs coaxially with the outer pivots of the links. In the form shown in Figs. 2 and 3, two steering- columns, one on each side of the frame and turning in a head 2, are connected by upper and lower forwardly-converging links 1 to two tie-rods 3 surrounded by tubes 9, on which are mounted sleeves 5, which carry the wheel axle at 4 and slide on the tubes 9 under the control of load and rebound springs 6, 7, the sleeves being rigidly connected together above the wheel by a bridge 8. An additional spring 11 may be interposed between the bridge 8 and the top spacing-link 10 of the swinging link structures, and may be enclosed in telescopic sleeves, or may surround a sliding guide member located between the parts 8, 10. In another form, the tie-rods are tubular, and the wheel-carrying member is of inverted-U form, and slides within the tie-rods. In a further form, the wheel-carrying member is secured to collars sliding within sleeves surrounding the tierods. In other modifications, the wheel-carrying member is in the form of a girder type of fork provided with sleeves sliding on the tie-rods, or with members sliding within tubular tie-rods.