Abstract An arrester device, in particular for small self-starting single phase synchronous motors, of the type in which a cam can pivot on a fixed axis parallel to the motor axis, integral with a stop finger which can co-operate with stop teeth provided for the rotor and which can be in friction contact, through an edge of an elongated part therein with a part of the rotor hub so that it can occupy, as the rotor rotates in the desired direction, a stable position corresponding to the withdrawal of the finger with respect to the teeth and so that it can occupy, as the rotor has a tendency to rotate in the other direction, a position for which the stop finger arrives onto the path of the stop teeth and blocks the rotor, in which device said cam is rigid and is movable with respect to the fixed axis, and elastic means being provided to draw it back into friction engagement of said edge of its elongated part on said part of the rotor hub.
An arrester device, particularly for small, self-starting single phase synchronous motors of the type provided with a stator and a rotor having an axis integral therewith, the device including a rigid cam, a fixed axis integral with the stator, said fixed axis being parallel to the axis of the rotor, stop teeth on the rotor, said cam being pivoted to the fixed axis and having a stop finger which, according to the position of the cam, is positioned in the path of the stop teeth for blocking rotation of the rotor or in a position out of the path of movement of the stop teeth, said cam being provided with a closed elongated aperture, and elastic means urging the cam in frictional contact with the rotor axis along the edge of the closed aperture.
Claim 2
Dependent Claim
134 words
An arrester device, particularly for small, self-starting single phase synchronous motors of the type provided with a stator and a rotor having an axis integral therewith, the device including a rigid cam, a fixed axis integral with the stator, said fixed axis being parallel to the axis of the rotor, stop teeth on the rotor, said cam being pivoted to the fixed axis and having a stop finger which, according to the position of the cam, is positioned in the path of the stop teeth for blocking rotation of the rotor or in a position out of the path of movement of the stop teeth, said cam being provided with a closed elongated aperture, and elastic means urging the cam in frictional contact with the rotor axis along the edge of the closed aperture.
Claim 3
Dependent Claim
30 words
THe arrester device as claimed in claim 1, in which the cam is further provided with a groove substantially perpendicular to the closed elongated aperture for receiving the fixed axis.
Claim 4
Dependent Claim
33 words
The arrester device as claimed in claim 1, in which the cam is provided with a pin and the elastic means includes an elastic metallic ring engaging the fixed axis and the pin.