Abstract: Certain therapies involving delivering materials, such as light absorbing particles, to the surface of a subject's skin. Thereafter, the movement of the material into skin structures, such as follicles, is facilitated by a mechanical device such as a massager. The present application describes certain devices useful in such therapies.

Abstract: A direct current brushless electric motor has a rotor, and a stator with inwardly extending teeth, between each pair of which a winding slot is defined. The radially inward face of each tooth has a dummy slot shaped so the reluctance forces between rotor and stator due to the presence of the dummy slots are the same as those due to the winding slots. Motor control arrangement incorporates a current feedback loop based on the incoming phase of each phase combination in the phase energization sequence in a driving mode and phase changeover may be initiated by Hall devices, two for each transition point, underlying the axial ends of the rotor magnets. The control arrangement may incorporate a pulse width modulation power supply permitting the establishment of bias currents under motor standstill conditions.

Abstract: A direct current brushless electric motor has a rotor, and a stator with inwardly extending teeth, between each pair of which a winding slot is defined. The radially inward face of each tooth has a dummy slot shaped so the reluctance forces between rotor and stator due to the presence of the dummy slots are the same as those due to the winding slots. Motor control means incorporate a current feedback loop based on the incoming phase of each phase combination in the phase energization sequence in a driving mode and phase changeover may be initiated by Hall devices, two for each transition point, underlying the axial ends of the rotor magnets. The control means may incorporate a pulse width modulation power supply permitting the establishment of bias currents under motor standstill conditions.

Abstract: An automatic golf ball teeing apparatus comprised of a chamber placed beneath the ground. A hollow piston is mounted in the chamber for vertical movement between first and second positions. Mounted within the piston is a pair of vertically spaced apart members; each of the members are movable relative to the piston; mounted between the members is a first coil spring and mounted between the lower member and the lower end of the piston is a second coil spring. A sleeve is mounted around the piston and is movable relative thereto and extends above the piston when the piston is in a lowered position. The sleeve is connected to the lower member such that the sleeve and lower member move together relative to the piston. A stop element is located at the top of the chamber for engaging the sleeve as the piston moves towards the second position for stopping movement of the sleeve relative to the piston, the second coil spring urging the sleeve back to its initial position as the piston is moved to its first position.

Abstract: An automatic golf ball teeing apparatus having a hollow golf ball conveying arm which is pivotal at one of its ends about an axis between a first golf ball receiving position and a second golf ball depositing position. When the arm is in the first position a ball is received at one end of the arm and when the arm is pivoted to the second position the ball will roll to the other end of the arm to be deposited on a tee. A mechanism is provided for pivoting the arm between the first and second positions. The mechanism includes a crank and an extensible rod connecting the crank to the arm and a member for rotating the crank. When the arm is pivoted to the second position it is engaged by a stop, however, the extensible rod will permit the crank to continue to turn for a predetermined distance and after the distance has been traveled by the crank the arm begins to return to the first position.