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Reward Candy Dispenser for Personal Computers
A personal computer peripheral, battery powered reward candy dispenser which immediately presents students with a single candy for each problem completed correctly.
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| Number | Title | Issue Date |
| 8179080 | Reciprocating actuator with closed loop servocontrol A reciprocating actuator includes at least one element moving reciprocally relative to a rack, a device for driving the moving element in a driving direction, an element for returning the moving element in an opposite direction, at least one sensor for detecting the... | 05/15/2012 |
| 8076893 | Displacement actuation and sensing for an electrostatic drive An electrostatic drive includes a first electrode and a second electrode responsive to a drive signal. The drive signal includes an actuation signal constituent and a sensing signal constituent. The sensing signal constituent is at a frequency higher than a natural ... | 12/13/2011 |
| 7598697 | Electric motor and a method therefor A motor and a method for serves finding the position of an armature in relation to a stator of the motor. In the method and the motor the armature is driven by an exciting field which is produced by exciting windings of the stator, and the armature is caused by the ... | 10/06/2009 |
| 7378813 | Method and device for determining the zero position of a yarn guide capable of cross-winding A system for determining a zero position of a yarn guide (25) of a textile winding device for cross-winding yarn into cheeses via a step motor (34). The yarn guide (25), acted upon by the step motor (34), is initially displaced in the dir... | 05/27/2008 |
| 7268504 | Stator position feedback controller Stator position feedback controller. A first position monitoring device responds to the position of a stator supported for relative motion by a machine base. A second position monitoring device responds to the position of a carriage with respect to the machine base.... | 09/11/2007 |
| 7211981 | Electric motor movement controlling method, an electric motor movement controlling system and a compressor The present invention provides an electric motor movement controlling method, where the electric motor is fed by a total voltage proportional to the network voltage. The method comprises steps of making a first measurement of level of the network voltage at a first ... | 05/01/2007 |
| 7089823 | Vibratory mechanism controller A controller for use in a vibratory mechanism includes an amplitude control circuit that generates an amplitude control signal that varies from a minimum value to a maximum value. The vibratory mechanism is adapted to vibrate at an amplitude based on an amplitude co... | 08/15/2006 |
| 6518721 | Oscillation isolator An oscillation isolator for supporting an oscillation isolation platform on a pedestal includes an active oscillation isolator having a displacement generating type actuator to reduce oscillation of the platform and a displacement adjuster provided betwee... | 02/11/2003 |
| 6509709 | Stepping motor controller The stepping motor controller comprising an excitation signal generator, a switching circuit, a PWM constant current control circuit and a current sensor further comprises a motor detector circuit that transmits a control signal for generating a constant ... | 01/21/2003 |
| 6498445 | Oscillation apparatus for oscillating roller An oscillation apparatus includes an oscillation mechanism for reciprocating an oscillating roller which can be rotated in the circumferential direction and can be reciprocated along the axial direction; an oscillation-width adjustment mechanism for adjus... | 12/24/2002 |
| 6320347 | Method of driving directly a rotary drum in a reproducing machine by a prime mover A rotor composite type three-phase stepping motor having a stator consisting of two stator elements each having 6 n pieces of stator magnetic pole with Ns pieces of pole tooth formed on the tip end of each stator magnetic pole piece, and a permanent magne... | 11/20/2001 |
| 6225773 | Stepping motor and having external rotor and electromagnetic-combined-permanent magnet stator A rotor composite type three-phase stepping motor having a stator consisting of two stator elements each having 6 n pieces of stator magnetic pole with Ns pieces of pole tooth formed on the tip end of each stator magnetic pole piece, and a permanent magne... | 05/01/2001 |
| 6181090 | Drive control method for linear oscillating motors and a linear oscillating motor A method for driving a linear oscillating motor and a linear oscillating motor are provided. The motor includes a fixed magnetic member, a movable member having a magnet and being supported to oscillate relative to the fixed magnetic member, a detector th... | 01/30/2001 |
| 6150789 | Stepper motor control In a preferred embodiment, a stepper motor control, including: a driver to drive the stepper rotor; a detector to detect a commanded step rate signal provided to the driver and to provide an output signal proportional thereto; a power control, responsive ... | 11/21/2000 |
| 5872440 | Oscillating mechanical device, in particular a card web comb for a textile machine, in which oscillations are sustained by means of a single-phase induction motor The oscillating mechanical device comprises a shaft on which an oscillating member is mounted, and which is resiliently urged towards a middle angular equilibrium position, together with a single-phase induction motor whose rotor is coupled to the shaft s... | 02/16/1999 |
| 5274315 | Card web comb driving system in machines for the textile industry A card web comb driving system in machines for the textile industry comprng a comb structure (27) mounted in such a way as to oscillate around a resting position under the control of elastic means (23 and 24) which accumulate mechanical energy and are as... | 12/28/1993 |
| 5252903 | Motor control circuit for autofocus unit A motor control circuit for an autofocus unit which microsteps a stepping motor to turn a rotor and drive a focus lens, which circuit has a memory which stores data on current values of a plurality of phases at rotation-stopping positions of the rotor, a ... | 10/12/1993 |
| 5119071 | Method and apparatus for controlling induction motor for compressor DC power is supplied to an induction motor for a compressor by switching ON/OFF in response to a modulated voltage waveform obtained from modulating waves which are used for generating AC power for energizing an induction motor and a carrier wave accordin... | 06/02/1992 |
| 5032778 | Apparatus for controlling operating stroke of reciprocating member, using encoder signal An apparatus for controlling an operating stroke of a reciprocating member to be reciprocated by a drive motor. The apparatus includes an encoder adapted to generate pulses each of which corresponds to a predetermined incremental distance of movement of t... | 07/16/1991 |
| 4516062 | Actuator This invention is directed to an actuator which is particularly adapted among many other possible uses, or use in adjusting the configuration of deformable mirrors. The actuator comprises a housing mounted for movement on a fixed base, the housing being f... | 05/07/1985 |
| 4300083 | Constant amplitude controller and method There is disclosed a constant amplitude controller with feedback control for a vibratory feeder apparatus wherein a controlled rectifier is used to rectify the A.C. line voltage applied to the feeder solenoid and to control the voltage to the feeder solen... | 11/10/1981 |
| 3959673 | Oscillation motors According to one feature a bearing-free oscillation motor, e.g. for driving an optical scanner or chopper comprises a torsion shaft fixed at one end for rotational oscillation about its axis, a rotor support member substantially more rigid in bending than... | 05/25/1976 |
