GB145748A - Improvements in suction sweepers - Google Patents

Abstract

145,748. Kirby, J. B. April 12, 1919, [Convention date]. Vacuum cleaning-apparatus.-The fanshaft is operatively connected with the supporting wheels of the cleaner during the forward stroke of the cleaner by an energy-storing device which continues to have a driving effect upon the fan-shaft after the forward movement of the cleaner has ceased. As shown, the body 30, Fig. 4, carrying the shaft 33 upon which the supporting wheels are mounted, is secured to the lower wall of the fan chamber, and the fan-shaft 35 is threaded to engage with a worm-wheel 38 mounted loosely upon the shaft. The worm-wheel is actuated by a spring-motor consisting of a sleeve 44 freely mounted upon the shaft between the fixed sleeves 42, 43 and having an enlargement 45 which engages with a driving-cam 45 secured to the sleeve 43. A spring is secured at one end to the worm-wheel and at the other to a finger 50 on the enlargement of the sleeve 44. A cam 52 secured to the hub 48 of the worm-wheel is adapted to engage with the finger 50 if the spring breaks. In a modification, the part 45a, Fig. 10, of the sleeve 44a is formed with teeth which engage with a pawl 81 carried by the body 30, and the worm-wheel 38<a> is connected by a spring with a sleeve 83 freely mounted upon the shaft and engaging with the sleeve 44a. In a further modification, the supporting wheels 34a, Fig. 12, are freely mounted upon the shaft 33<a> and connected to it by spring 85. In this case, the worm-wheel 38<a> engages with a friction-clutch 46<a> secured on the fixed sleeve 43a. As shown in Fig. 1, the lip 7 of the nozzle-mouth extends rearwardly to form a dustpan 9 which communicates through an aperture 5 with the fan chamber to which the dust-bag is secured by clips 71. The arms 66 of the handle are pivoted to the fan chamber so that the cleaner can tilt rearwardly when raised by the handle The brush is operated through adjustable friction rollers 13, 24 mounted in the lower wall of the fan chamber, and engages with teeth 11 formed 'in the lip 7.