GB191517537A - Improvements in Mowing Machines. - Google Patents

Abstract

17,537. Maschinenfabrik Fahr. Akt.-Ges. Dec. 22, 1914, [Convention date] Mowing - machines. - The cutters of a grassmowing machine are arranged to be lifted in a single stage to the vertical position solely by the movement of a pedal operated by the driver, the connexion being so arranged that the movement of the pedal is small in order to keep it within easy reach of the driver. The pedal lever b, pivoted at a, is connected by a rearward extension d to the lifting-spring e and carries in the usual manner the detent f releasable by the pedal c, which, according to the height of the cutters, engages in one or other of the notches g in the frame. An internally toothed sector h is rigidly connected to the lever band gears with an externally toothed sector i of smaller diameter pivoted on the frame and operating the lifting-lever k carrying the cutter-supporting link l. The small movement of the pedal c, which remains within easy reach of the driver's foot through all its path, is thus magnified to give the full lifting movement for the cutters. In one modification, the multiplying effect of the movement of the pedal is obtained by gear-wheels, and, as a further modification, the lengths of the levers may be arranged to give the desired effect. The lifting-spring e is so connected to the extension d of the lever b that its turning effect is approximately constant throughout the movement of the pedal lever.