Abstract: A toothbrush provides a head with bristles, a neck and a handle. An eccentrically rotational weight is engaged for rotation with a motor, the weight disposed within the head. The motor is disposed within the handle. The head and neck are integrally formed with a natural resonance frequency of vibration approximately equal to the rotational speed of the motor and synchronized therewith.

Abstract: A gyroscopic exercise device has a pair of handles attached to a housing. A user holds and rotates the handles along a cone-like path causing precession of a rotor, which is rotating about its spin axis, to provide resistance to the user. The device has a ring guide that holds ends of a shaft, which is coupled to the rotor. The periphery of the ring guide and the ends of the shaft are within a circular race defined by the housing. A motor attached to the ring guide drives a wheel that rotates the rotor about a spin axis by using energy provided by batteries in one of the handles. The energy passes through a conducting conduit that rotates about the precession axis. The ring guide, motor, and rotor can rotate together during precession of the rotor.

Abstract: A toothbrush provides a head with bristles, a neck and a handle. An eccentrically rotational weight is engaged for rotation with a motor, the weight disposed within the head. The motor is disposed within the handle. The head and neck are integrally formed with a natural resonance frequency of vibration approximately equal to the rotational speed of the motor and synchronized therewith.

Abstract: A safety device for use with a toy guns, less-lethal guns (such as non-powdered guns) and lethal guns detects motion of the gun, and causes light emitting diodes or other light sources incorporated into the gun to prominently flash. The flashing light sources alert bystanders in a way that distinguishes lethal firearms from toy guns and less-lethal guns. The flashing diodes can also be activated when the gun is armed, cocked or otherwise ready to be fired. Motion is detected through the use of an electric circuit that includes a spring, an oscillating mass, and a ring adapted to surround the oscillating mass.

Abstract: A safety device for use with a toy guns, less-lethal guns (such as non-powdered guns) and lethal guns detects motion of the gun, and causes light emitting diodes or other light sources incorporated into the gun to prominently flash. The flashing light sources alert bystanders in a way that distinguishes lethal firearms from toy guns and less-lethal guns. The flashing diodes can also be activated when the gun is armed, cocked or otherwise ready to be fired. Motion is detected through the use of an electric circuit that includes a spring, an oscillating mass, and a ring adapted to surround the oscillating mass.

Abstract: Toothbrushes that utilize a rotating eccentric weight positioned in or near the head of the toothbrush to cause movement of the head, and methods relating to same.

Abstract: A side mount garage door operator capable of being positioned on either the ceiling or end wall of a garage at either side of the garage door on a frame unit, the operator providing a clutch for disengaging the drive motor from the garage door in the absence of electric power and having a manual graspable handle operated by a solenoid when power is present and operable manually in the absence of power. Novel limit means having limits which is on the end of an axially movable bar which is moved by a follower riding in a spiral groove in the base of a disk such as a gear connected to the drive shaft.