Anti-theft devices for motorcycles, bicycles and the like

Claim 2

An anti-theft device for motorcycles, bicycles and the like having a main frame comprising in combination with said main frame a signal means on said frame, a power source on said frame spaced from said signal means for actuating the same, a connection between said power source and signal means, a solenoid switch means in said connection in normally open position, a lock operated interrupter means in said connection having one position in which the said connection is interrupted and a second position in which the connection is closed and a tilt actuated switch in parallel with said lock operated interrupter and said solenoid switch means having a normal position in which the connection through said tilt switch is broken and a tilt position in which the connection through said tilt switch is closed and completed whereby when the lock operated interrupter means is in its second position and the frame is tilted, the signal means is actuated and the solenoid switch is closed, said tilt switch being carried from a normally operative to a normally inoperative position by said lock operated interrupter switch as it moves from its said second position to its said one position.

Claim 3

An anti-theft device as claimed in claim 1 wherein the signal means, power source, lock operated interrupter means and tilt switch are contained within a frame member.

Claim 4

A combination lock operated interrupter and tilt switch comprising an outer lock housing, an inner rotatable cylinder in said housing rotatable from a lock position in which a circuit connected thereto from a power source to a signal means is interrupted to an unlock position in which said circuit is closed by an insertable key means, a generally hour glass shaped tilt switch of dielectric material fixed on said rotatable cylinder and in parallel with said interrupter in said circuit from the power source to said signal means and having a generally cylindrical portion at one end and a generally hemispherical portion at the other, the two ends connected by an intermediate hollow neck portion, an electrode means in said hemispherical portion extending radially inwardly from the center of the hemispherical wall, a pool of mercury in said tilt switch adapted to surround said electrode in the locked position of the rotatable cylinder, an annular electrode within said hemispherical portion spaced slightly above the mercury whereby when the tilt switch is tilted in any direction, the mercury contacts said annular electrode, external electrical connections to each of said electrodes forming a part of a second circuit parallel to the interrupter switch, said mercury being adapted to pass through the hollow neck portion to the cylindrical portion when the rotatable cylinder is rotated to the unlock position whereby the mercury is removed from contact with the electrode.

Claim 5

A combination lock operated interrupter and tilt switch comprising an outer lock housing, an inner rotatable cylinder in said housing rotatable from a lock position in which a circuit connected thereto from a power source to a signal means is interrupted to an unlock position in which said circuit is closed by an insertable key means, a generally hour glass shaped tilt switch of dielectric material fixed on said rotatable cylinder and in parallel with said interrupter in said circuit from the power source to said signal means and having a generally cylindrical portion at one end and a generally hemispherical portion at the other, the two ends connected by an intermediate hollow neck portion, an electrode means in said hemispherical portion extending radially inwardly from the center of the hemispherical wall, a pool of mercury in said tilt switch adapted to surround said electrode in the locked position of the rotatable cylinder, an annular electrode within said hemispherical portion spaced slightly above the mercury whereby when the tilt switch is tilted in any direction, the mercury contacts said annular electrode, external electrical connections to each of said electrodes forming a part of a second circuit parallel to the interrupter switch, said mercury being adapted to pass through the hollow neck portion to the cylindrical portion when the rotatable cylinder is rotated to the unlock position whereby the mercury is removed from contact with the electrode.