Patent GB-375090-A (GB)
Title: Improvements in mechanisms for operating wind-screen wipers
IPC: B60S1/34
Filed: 1931-07-09
Abstract: 375,090. Moving signs. CUSSET, J. E., 33, Avenue de Suffren, Paris. July 9, 1931, No. 19819. Convention date, July 16, 1930. [Class 3 (i).] A shaft 6, Fig. 4, adapted to be oscillated by an electric, pneumatic, or other source of energy, is rigidly connected to a primary arm 4 to which is pivotally connected a secondary arm 14 carrying a windscreen wiper 17, means being provided whereby, as the arm 4 oscillates, the arm 14 is given an oscillatory movement of quicker angular speed and reverse angular direction, while at the same time the wiper 17 is caused to travel substantially parallel to an extreme position. A shaft 1 rotatably mounted within the arm 4 is provided at one end with a spur pinion 2 and at the other end with a toothed wheel 3. The pinion 2 meshes with a fixed wheel 7 as the arm 4 oscillates so that the wheel 3 is oscillated. This wheel meshes with a pinion 10 secured to a shaft 9 which is rotatably mounted in a yoke 8 carried by the arm 4, passes through a wheel 11 fixed to the yoke, and is connected to a channel-shaped member 12 articulated to the hollow arm 14. Within the member 12 and arm 14 is a flexible chain-like shaft 21 one end of which is fitted with a pinion 22, Fig. 5, meshing with the wheel 11. The other end meshes with a toothed wheel 19 secured to a pin 16 which carries the windscreen wiper 17 and is pivotally connected to the arm 14. The arrangement is such that the wiper when in operation travels over a substantially rectangular portion of the windscreen. In the modification shown in Fig. 6, the rocking shaft engages a socket 23 rotatably mounted in a member 29 secured to the windscreen. The socket is secured to a bar 24 terminating in a yoke 25 one limb to which forms a bearing for a shaft 26 carrying a member 27. This member is connected by links 28 to the member 29. A pinion 30 fixed to the shaft 26 meshes with a pinion 31 on a shaft provided also with a pinion 33 meshing with a pinion 34 which is secured to a shaft 35. This shaft carries the secondary arm of the mechanism corresponding to the arm 14, Fig. 4, the secondary arm being provided with a pinion engaging a pinion 36 fixed on the yoke 25. In the arrangement indicated in Figs. 7 and 8, the windscreen wipers are duplicated, the primary arms 38, 38<1> being connected by a rod 42. The outer ends of the arms are yokeshaped to support gearing for causing angular movement of the secondary arms 50, 501 consequent upon angular movement of the arms 38, 38<1>. The yokes form bearings for shafts 40, 40<1> which are rigidly connected by a rod 41, so that the relative rotation of these shafts with respect to the yokes is determined by the angular movement of the arms 38, 38<1>, and hence through the medium of the gearing supported by the yoke, the angular movement of the arms 50, 501 is controlled. These arms carry pins 52, 521 rigidly connected to a rigid rod 53 and to the wipers 55, 55<1> which are constrained to clean a rectangular area of the windscreen. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the application of the invention to advertising devices comprising movable lamps. This subject-matter does not appear in the Specification as accepted.