会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明专利
    • Improvements in and relating to sound heads for reproducing sound from sound films
    • GB449547A
    • 1936-06-29
    • GB3717934
    • 1934-12-28
    • DAVID PERCIVAL FISHER
    • G11B5/00
    • 449,547. Sound - film feeding and guiding devices. FISHER, D. P., 22, Wigan Street, Wellington, New Zealand. Dec. 28, 1934, No. 37179. [Class 40 (ii)] In apparatus for reproducing sound from a film record, uniform movement of the film is ensured by passing it over a freely-mounted heavy cylindrical roller 10, which is driven by the film before it reaches the sound-gate 5, the roller 10, to which the film is fed by an intermittent sprocket 9, being of large diameter sufficient to provide a large arc of contact with the film, and of sufficient mass to produce a steadying effect. The film also passes over a smooth roller or a sprocket 2, preferably located close to the lead-in side of the sound-gate, and having a fly-wheel 11 or the like on its spindle. which completes the elimination of irregularities of motion of the film before it enters the soundgate. The roller 10, which is centrally recessed, is pivoted at 20 on an arm 21, adjustably mounted on a pin 22, Figs. 7 and 8. An arm 27 is secured in an adjustable manner on a boss 28 formed on the arm 21, and provides a pivot bearing at 25 for another arm 24 carrying a roller 19 which, under the action of a coiled spring 29, presses the film against the heavy roller 10. With the arrangement shown, the roller 10 can be adjusted to the best position relatively to the sprocket 9, and the roller 19 may be independently set to the best position in relation to the roller 10. After leaving the sound-gate 5, the film passes over a guideroller 7 and over a resiliently-mounted jockey pulley 12, arranged as described in Specification 449,600.
    • 5. 发明专利
    • Improved Anti-skid Attachments for the Wheels of Automobiles.
    • GB113996A
    • 1918-03-13
    • GB247117
    • 1917-03-10
    • DAVIES DAVID PERCIVAL
    • DAVIES DAVID PERCIVAL
    • B60B15/04
    • 113,996. Davies, D. P. March 10, 1917. Slipping - preventing attachments to wheels.-Relates to devices in which road-grips, normally in. operative, are projected to engage the ground either by manual operation or automatically on the occurrence of slipping or skidding. Figs. 1 and 2 show the non- automatic form in which a series of ribbed treads D have projections engaging spiral grooves in rings E F mounted on a ring A fixed to, and rotating with, the road wheel. Springs I normally maintain the parts in the position shown, i.e. with the treads D retracted, means being provided for braking the rings E F to cause the road wheel to over-run the rings, with the result that the treads Dare forced radially outwards to engage the road. For this purpose, a ring J is thrown into engagement with the coned surface of the ring E F by means of a collar L threaded on a fixed flanged ring G. The device may be locked in any operative position by means of a toothed ring H which is caused to engage a rack on the ring E F by the movement of a ring K disposed similarly to the ring M. The rings L, K are formed with racks engaged by pinions N, M which are operated by the driver through crank mechanism S, R. Figs. 3 and 4 show the automatic form of the device in which a set of spring-pressed rods J, normally in road-contact, are disposed between two sets of ribbed treads D mounted as shown in Figs. 1 and 2. The rods &c. J are carried by the outer member of a two-part ring K K, the two parts of which have a toothed engagement and are capable of slight relative axial displacement. Plates Z fitted on springs in recesses in the inner part are formed with studs working in helical grooves in a ring C which, together with the main rings A, B, is fixed to the wheel. On the occurrence of circumferential or side slip, the inner member of the ring K K is displaced axially so as to be forced into frictional engagement with one or other of the rings E, F, G, H. The consequent retardation of such ring results in the projection of the corresponding set of treads D, as described with reference to Figs. 1 and 2.
    • 7. 发明专利
    • Improved means for protecting cycle saddles and seats from the weather
    • GB415558A
    • 1934-08-30
    • GB1957433
    • 1933-07-11
    • DAVID PERCIVAL DAVIESARTHUR BALFOUR MAY
    • B62J1/18
    • 415,558. Saddle covers; luggagecarriers. DAVIES, D. P., 46, Anton Road, Andover, Southampton, and MAY, A. B., Dollarward House, Cirencester, Gloucestershire. July 11, 1933, No. 19574. [Classes 136 (i) and 136 (iii).] A device for protecting cycle saddles from the weather, and applicable also as a luggage-carrier, comprises an underframe a adapted to be secured to the rear fork of the cycle, and a cover e which is connected to the underframe a by links h, j in such a manner that, when not in use as a cover, it lies on the underframe (in which position it may be used as a carrier), and when required as a cover, it can be swung upwards, without being inverted, into the saddle-covering position. The front end of the underframe a is apertured at a for bolting to the rear fork, and the rear part is supported by pivoted stays c adapted to be clipped to the fork. The cover e is held in its lowered position on the underframe a by a slidable fastening strip l, l having turned-down members l , l to engage under transverse bracing-strips a , the fastening being released by pulling back the strip l, l against the action of tension springs. The cover may be provided with a clip to engage the saddle.