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    • 31. 发明专利
    • Improvements in strip or film-gates for picture projectors, cameras, and other apparatus using a film or strip material
    • GB579341A
    • 1946-07-31
    • GB165544
    • 1945-01-29
    • ALBERT FREDERICK WOODBRITISH SOLENOIDS LTD
    • G03B1/22
    • 579,341. Optical - projection apparatus; film cameras. WOOD, A. F., and BRITISH SOLENOIDS, Ltd. Jan. 29, 1945, No. 1655/44. [Classes 97 (i) and 98(i)] A film gate, particularly for use in projecting still pictures from a strip film, comprises an apertured frame 1 and a carriage adapted to be reciprocated to draw the film over the aperture, the carriage comprising spaced plate members 5, 7 accommodating between them a claw member 6 having one or more resilientlydisposed claws 14 adapted to engage in the film perforations in one direction of movement and to trail over them in the other. As shown, an apertured plate 2 secured to the front of the frame 1 carries at each vertical edge strips forming guides 13 for the edges of the rear plate 5 of the carriage. The claw member 6 is of inverted U form and is provided at the top with a lug 10 which engages in a slot in the front plate 1 to form a hinge connection. Triangular claws 14 on each limb of the claw member extend through corresponding slots 18 in the frame members 1, 2 at the sides of the gate aperture, and are pressed into engagement with the film by leaf springs 11 in the carriage. At the top of the stroke the claws ride up ramps 19 which move them out of contact with the film so that it can be moved by rotation of the sprocket 22". The carriage is moved down- - wardly by the thumb-press 16 and returned by springs 27 .
    • 32. 发明专利
    • Improvements in or relating to releasable fasteners
    • GB553953A
    • 1943-06-11
    • GB1379341
    • 1941-10-27
    • R K DUNDAS LTDNORMAN FREDERICK WOODRONALD DOUGLAS KING
    • B64D29/08F16B5/10
    • 553,953. Stud fastenings for cowlings &c. DUNDAS, Ltd., R. K., WOOD, N. F., and KING, R. D. Oct. 27, 1941, No. 13793. [Class 44] In fastenings for aircraft cowlings &c. of the kind having a stud element mounted on one part and engaging with a socket element on the other part, the socket element is mounted with limited lateral play to allow for slight non- registration of the stud with the socket aperture. The stud may also be mounted to allow lateral play in known manner. Figs. 1, 2 show a stud 4 rotatably mounted in an aperture in the cowling 3 and retained by resilient washer 6, the stud having a tapered end leading to screw threads of relatively steep pitch merging into threads 5 of less pitch. The threads engage by snap action with spring tongues 2 forming part of the socket element mounted on an apertured support 1. The tongues are integral with a ring of channel section embracing the edge of the aperture in the support with sufficient clearance, as shown, to allow the requisite lateral play. Flat parts 2a, 7 of the tongues and ring respectively bear against opposite faces of the support. The ring is divided at 8 to allow it to be sprung into place or wormed into place by passing one end through a radial slot 9 extending from the aperture and rotating so that the rest of the ring follows. When home, an upturned part 7b of the trailing end remains engaged in the slot to prevent rotation of the ring in use. Modifications are described in which the spring tongues are riveted or otherwise secured to a separately formed channel ring. The above fastening may be tightened or released by screw action. The application to a fastening in which the stud is tubular with helical slots engaging by rotation with a spring wire diametrically disposed across the support aperture, and to another in which the stud end is inserted between parallel wire springs which snap into slots in the stud, are also described. In these the spring wires are bent to provide portions embracing the edges of the socket aperture and an end of the wire is bent up to engage in a slot similar to slot 9 to anchor the wires against rotation. The marginal portions of the socket aperture may be countersunk or bent to provide a spherical seating for the edge-embracing portions of the socket element. The invention may be used in conjunction with the devices described in Specification 553,956. Reference has been directed by the Comptroller to Specification 548,658.
    • 33. 发明专利
    • Improvements in or relating to devices for marking out and machining workpieces
    • GB552501A
    • 1943-04-12
    • GB1145441
    • 1941-09-08
    • R K DUNDAS LTDRONALD DOUGLAS KINGNORMAN FREDERICK WOOD
    • B25H7/02
    • 552,501. Optical gauging-apparatus. DUNDAS, Ltd., R. K., KING, R. D., and WOOD, N. F. Sept. 8, 1941, No. 11454. (Class 106 (ii)] [Also in Groups XXII and XXIII] Jigs for use in drilling, marking out, and gauging work and for like operations may be employed in the construction of plate jigs for repetitive work or drilling for work required singly or in small numbers only. A base 2, Fig. 1, has a groove 20 in which is slidably positioned an angle bar 19 having a cross groove in which is mounted a member 21 carrying a bar 5 secured at 22. The bar 5 is graduated and carries a cursor 6 provided with a vernier and detachably connected by a screw 9 and nut 12 to an auxiliary cursor to provide for fine adjustment when the auxiliary cursor is clamped by a handled cam 14. Similar cams clamp the main cursor after adjustment. The cursor 6 carries an arm 1 at right angles to the bar 5 and this arm also has main and auxiliary cursors the main cursor having a series of holes 4 in which may be placed a bush 36, Fig. 8, having a spring- retracted centre punch 38, or a bush carrying a scriber or a bush 48, Fig. 10, carrying a fixed focus inspection microscope with a branch 49 for a lamp for use in checking up finished work. The bar 5 may be fixed to the base 2 by means permitting angular adjustment about. an axis parallel to the bar a graduated disc indicating the angular adjustment made. This enables the jig to operate over a surface at right angles to or inclined to the surface 2.