Patent GB-466424-A (GB)
Title: Improvement in windshield cleaner
IPC: B60S1/18
Filed: 1935-11-27
Abstract: 466,424. Windscreen-cleaners. TRICO PRODUCTS CORPORATION. Nov. 27, 1935, No. 32860. Convention date, Jan. 21. [Class 138 (i)] [Also in Group XXIV] In a windscreen-cleaner in which power therefor is taken from a moving part of a vehicle and transmitted through means including separable clutch elements adapted to be automatically separated to disconnect the power from the wiper by resilient means at a predetermined position of the wiper under control of a manually-operable presettable member, the separation of the clutch parts is adapted to arrest the movement of the wiper non-positively, and the resilient means is adapted to be held under tension independently of any operating member of the wiper-actuating mechanism, prior to its release for effecting the separation of the clutch parts. In the construction shown, a shaft 1 which may be the cam shaft of the vehicle has a hollow slotted end to receive a spline 4 on a shaft having a flexible part 8 leading to a housing 10 and terminating in a shaft 11. This shaft is splined to a shaft 12 adapted through worm gearing to drive a wiper-actuating shaft 17. The shaft 17 is provided with a crank 23 connected by links 25 to a pair of wipers (not shown). The crank 23 has a shoulder 24 adapted to engage a shoulder on an arm 20 which is secured to a shaft 29 provided with a pinion 19. The pinion is in mesh with a slidable rack 18 rotatably connected to the shaft 11. The arm 20 is connected to one end of a spring 21, the other end of which is connected to a bracket 22. The shaft 29 is connected by means of a radial pin 30 and a circumferential slot 31 to a shaft 28 provided with a handle. A detent 32 on the shaft 28 is adapted under the influence of a spring 38 to engage in one or other of two seats 33, 37 provided on a boss 34 of the housing 10. Normally the detent engages in a seat 37, and to start the cleaner the shaft 28 is turned so that the detent rides up the face 36 of the boss 34, withdrawing the arm 20 from the path of the crank 23, and the detent engages in the seat 33. At the same time the pinion 19 is rotated to move the rack 18 and effect clutching of the cleaner to its drive. Rotation of the pinion brings the arm over to be held against a stop pin 27 by the spring 21. To stop the cleaner, the shaft 28 is turned in the reverse direction, until the detent 32 engages in the seat 37. The arm 20 is thereby moved into the path of the crank 23. The pinion 19 is not rotated owing to the lost motion connection 30, 31. When the trip arm 23 during its rotation engages the arm 20, the spring 21 rotates the arm, thereby through the pinion 19 and rack 18 causing de-clutching of the cleaner drive, so that the wipers are arrested in positions outside the field of vision. Means may also be provided whereby the wipers are parked outside the area of the windscreen normally traversed during operation. The casing 10, for this purpose, is slidably mounted and is adapted to be moved by a cam 40 fixed on the shaft 28, so that when the cleaner is shut off, the axis 17 is moved to give a slight movement of the wipers beyond their normal traverse. Specification 421,688 is referred to.