6804. Dahl, H. March 20. Speed indicators. -Speed indicators for locomotives or other vehicles mounted on springs are driven from the axle, motor, or the like, by means of a flexible shaft a. In the apparatus shown in Figs. 1 and 3, a lamp h is arranged behind an aperture g in a casing f enclosing a coloured glass or transparent signal disc e, which indicates the speed to persons on the vehicle or at a distance. The disc is rotated by a sliding sleeve c of the govornor acting on a slotted arm d. A rectangular plate or other device may be used instead of the disc. For railway or other vehicles which are required to travel in both directions, motion is transmitted from the wheels or driving-mechanism to the indicator shaft by two flexible shafts, one operating in one direction, and the other when the vehicle is reversed.