Two-wheeled skate board for oscillating forward movement has two tread bores which are screwed to supports by wood screws

摘要

The two-wheeled skate board for oscillating forward movemetn has two tread boards (1), which are screwed to supports (6) by wood screws 14). To stabilize the frame, the supports are connected by screws (2) with each other. With the foremost and rearmost screws, doubled axial bearings (11) are welded. The central point of the ball bearing guide (5), which guides the wheel (7) by ball bearings (8), is located behind the center of the axial bearing. The rotary angle of the ball bearing guide is limited by stops on the screw. The lateral force stemming from the oscillating movement acts on the wheels and gives rise to a force in a forward direction. Oscillation occurs alternately with the front wheel to the left and to the right, whereby the wheel at the end of the movement is slightly raised and on the opposite side is further oscillated. The rear wheel thus oscillates with it automatically. The brake (12) is located directly in the wood of the support by a rotary spring (13) and on operation presses on the wheel.