Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
F03G1/00—Spring motors
F03G1/02—Spring motors characterised by shape or material of spring, e.g. helical, spiral, coil
F03G1/022—Spring motors characterised by shape or material of spring, e.g. helical, spiral, coil using spiral springs
Selbsttaetige Sicherheitsvorrichtung gegen uebermaessiges Anspannen oder Zerreissen der Feder von Federantriebswerken an Sprechmaschinen, Uhren o. dgl.