Patent GB-466423-A (GB)
Title: Improvement in windshield cleaner
IPC: B60S1/18
Filed: 1935-11-27
Abstract: 466,423. Windscreen-cleaners. TRICO PRODUCTS CORPORATION. Nov. 27, 1935, No. 32859. Convention date, Jan. 21. [Class 138 (i)] [Also in Group XXIV] In a windscreen-cleaner operated by a moving part of a vehicle through clutch means adapted to be automatically disconnected, to arrest the wiper non-positively at a predetermined position, under the control of a manually-operated pre-settable member, a speedgoverning device is provided between the driving element of the clutch parts and the source of power in order to render the wiper-arresting action substantially uniform. In the construction shown, two wiper arms 21 are connected by links 24 to a crank arm 22 carried by a shaft 20 which is adapted to be driven through a flexible shaft 15 from a moving part of the vehicle, such as a shaft 3. The shaft 3 through worm gearing drives a shaft 6 provided with a driving clutch member 7, a driven clutch member 8 and connecting clutch shoes 9. The shoes have peripheral grooves 11 in which an encircling resilient member 10 is held, this member pressing the shoes against the periphery of the member 7. The member 8 has fingers 12 extending between adjacent clutch shoes 9. The clutch shoes when rotating above a predetermined speed move outwardly due to centrifugal force, allowing slip between the shoes and the driving member 7. The member 8 is adapted to be connected to the flexible shaft 15 through connectors 16, 17, the connector 17 being slidably mounted in a housing 18 and urged towards the connector 16 by a spring 19. The opposite end of the shaft 15 terminates in a shaft 32, which has a splined connection with a shaft 31 mounted in a housing 28 and connected through worm gearing with a gear wheel 25 on the wiper-operating shaft 20. A spring 35 stronger than the spring 19 surrounds the shaft 32 and is compressed between a fixed abutment in the housing 28 and ring 41. The ring 41 is slidable between shoulders on the shaft 32 and is engaged by a yoke 34 which forms part of a slide 33. When the cleaner is in operation the slide 33 is held in a position to compress the spring 35, thereby allowing the spring 19 to urge the connector 17 into engagement with the connector 16. The slide is provided with a shoulder 39, which during the movement of the slide to compress the spring 35, passes beneath a pivoted spring-pressed latch 37, following which the latch drops behind the shoulder. To release the slide from the latch, there is provided a trip pin 42 on the gear wheel 25, the pin being adapted to act on the outer end of a release member 43 whereby a lug 44 engages a pin 45 on the latch to lift it. The member 43 is pivotally mounted on a slidable support 47 formed with a rack 49 for engagement with a pinion 48 which can be turned by means of a handle on the shaft 50. Upon movement of the handle in one direction, a lug 52 on the slide 47 engages the stop 39 to move the slide 33 and compress the spring 35 whereby the wiper is put into operation. Upon reverse movement of the handle the member 43 moves away from the slide 33 into position for the nose 43<1> of the release member to be engaged by the trip-pin 42. The spring 35 then acts to disengage the clutch member 17 from its drive and bring the wiper to rest at a predetermined position to one side of the field of vision. To enable the wiper to be parked beyond the limit of its normal path of movement the housing 28 is adjustably mounted on a bracket 53 by pins and slots. The shaft 50 is provided with an eccentric 57 engaging lugs on the bracket 53, so that as the shaft is turned the eccentric moves the housing, thereby shifting the shaft 20 and extending the path of movement of the wipers, as indicated in Fig. 1. Specifications 421,688 and 466,424 are referred to.