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
    • GB254260A
    • 1926-10-07
    • GB600626
    • 1926-03-03
    • JOSEPH HOROWITZ
    • G09F21/04
    • 254,260. Horowitz, J. June 25, 1925, [Convention date]. Void [Published under Sect. 91 of the Acts]. Reel and non-endless web apparatus; actuating and controlling.-A notice or advertisement band 10 is wound on and off drums 1, 2 by compressed fluid admitted intermittently to a cylinder 12. The piston 13 carries a cross-head 17 to which are pivoted two pawls 18 which engage teeth uniformly arranged along an endless chain 8 passing over sprockets 9 on the drums. The pawls 18 are brought together by gravity or springs and force the chain 8 along during the upward motion of the piston 13, and are separated by fixed stops 19 so as to ride over the chain teeth when the piston descends under gravity or spring action. A release valve is fitted to allow escape of fluid from the cylinder 12. A detent 21 fixed to the cross-head 17 engages pins 22 on the drum 1 at the top of the piston-stroke to register the band 10. Reversal of the band motion is effected by duplication of the cylinder etc. on the opposite side of the chain 8. When the apparatus is fitted to a vehicle compressed air may be produced at the required occasions by a track projection 23, Fig. 7, which engages a pivoted lever 24 and forces in the piston-rod of one of two cylinders 28, 29 against the action of a spring 31. On passing the projection 23 the spring returns the piston and the compressed air is admitted to the requisite cylinder 12.