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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 |
| 5302035 | Method of driving wire-dot print head To suppress a secondary bound of a print wire of a dot matrix printer which may occur after a single dot or continuous dots are printed and also to prevent both density variation of printed characters and printing ghost from occurring, a braking pulse is ... | 04/12/1994 |
| 5263994 | Printer having a plurality of printing modes The dot impact printer of the invention sets an optimum printing speed based on various factors, such as kanji or alphanumeric characters, and to set an optimum brake pulse and an optimum energizing energy corresponding to the set optimum printing speed. ... | 11/23/1993 |
| 5180235 | Impact printer with variable impact and rebound control An impact printer has a platen, a carriage movable in parallelism to the platen, a hammer carried on the carriage, driving means for protruding the hammer toward the platen, detecting means for detecting the speed of the hammer striking against the platen... | 01/19/1993 |
| 5147142 | Impact type recording apparatus having reduced impact sound during return of the hammer An impact type recording apparatus includes a platen for supporting a recording medium, a hammer guided for reciprocal movement between an impacting position in which it strikes against the platen and a retracted position spaced apart from the platen, ene... | 09/15/1992 |
| 5042376 | Aerodynamic damper for an impact printing actuator Aerodynamic damper for impact printing actuator in which a movable armature of a magnetic circuit has to resume, after actuation, with minimum rebounding and oscillations, a stable rest position defined by the contact of a flat surface of the armature wit... | 08/27/1991 |
| 4974976 | Printing hammer device A case member and a resilient supporting member are removably coupled to each other. The case member has a mounting portion mounted on a traveling member, which includes a carriage of a printing apparatus. The supporting member includes first and second p... | 12/04/1990 |
| 4944617 | Encoder employing a shock absorbing tension spring An encoder having a special construction which includes a special tension spring which increases the life of the encoder. The tension spring has first and second "U"-shaped portions formed on one end thereof with the remaining end of the spring being secu... | 07/31/1990 |
| 4900169 | Print hammer damping mechanism for typewriters and like printing machines The print apparatus comprises a character-carrying element of the `daisywheel` type with flexible spokes which can be selectively positioned in front of a platen roller, a print hammer for moving a selected character towards the platen roller, an actuatin... | 02/13/1990 |
| 4842429 | Type face striking system in an office writing machine A type face striking system for striking a type face to produces an imprint on a record carrier in a writing machine, the system including; an electromagnetically actuatable printing hammer movable under the influence of an electrically generated magnetic... | 06/27/1989 |
| 4810113 | Print head driving system A print head driving system for driving a print head having a plurality of print wire controlling magnetic circuits and a plurality of print wires respectively operatively associated with the print wire controlling magnetic circuits regulates the flight s... | 03/07/1989 |
| 4787760 | Dot matrix print head A moving piezoelectric type crystal element drives a print wire in the direction of a platen and against the resilience of return spring and a rebound spring. A voltage pulse is applied through a conductor and across the piezoelectric element to cause dis... | 11/29/1988 |
| 4781477 | Dot matrix print head A piezoelectric crystal element is resiliently urged to a home position and drives a plunger member and a print wire in printing operation. Upon rebound movement, the crystal element contacts a step portion of the print head housing to inhibit oscillation... | 11/01/1988 |
| 4749976 | Solenoid A solenoid-type magnet drive, including a coil surrounding in parts an axially movable armature, and a housing for mounting the coil, further includes an attenuating device which comprises an attenuating disk positioned abutting centrally one end of the a... | 06/07/1988 |
| 4744684 | Impact-type recording apparatus An impact-type recording apparatus is disclosed. The apparatus of this invention comprises: a platen for supporting a recording medium; hammer means guided for reciprocal movement between a strike position where the hammer means strikes a character elemen... | 05/17/1988 |
| 4722622 | Damping apparatus for a print hammer mechanism Damping apparatus for minimizing print hammer settle time permits an increase in the hammer repetition rate, and in which the damping element is a reactive mass which is freely movable behind the actuated element to effect one or more energy transfer coll... | 02/02/1988 |
| 4643600 | Stabilizing device for hammer bounding at printers A stabilizing device containing two bonded elastomeric materials with restitution coefficients that vary inversely with temperature changes. The resultant restitution coefficient of the printer hammer back-stopper remains relatively constant regardless of... | 02/17/1987 |
| 4634303 | Actuator for dot matrix printhead An improved dot matrix actuator is provided which includes a magnetic circuit formed of a yoke assembly and a pivotal armature. The armature is pivotally supported with respect to the yoke by means of a flexure assembly which eliminates the need for a tru... | 01/06/1987 |
| 4613243 | Wire matrix printer with damping means Electromagnetic printing group for a dot matrix printer where the armature movement towards the rest position isdamped by a counterarmature interposed between the armature and a resilient element defining the rest position so that the air cushion interpos... | 09/23/1986 |
| 4603985 | Backstop and damping apparatus for actuator Damping apparatus within an actuator device in which a backstop is supported on one portion of a dual cantilever to match the movement of the impacting actuator to reduce wear and provide positive restoration of initial position, wherein the backstop-supp... | 08/05/1986 |
| 4569607 | Printing hammer rebound control A printing hammer rebound control system for use in impact-type printing machines is provided. The present system includes separate memory devices for storing the information of primary and its associated secondary energization. The primary energization i... | 02/11/1986 |
| 4547087 | Microprocessor-controlled printing mechanism having an opto-electronic sensor A plunger armature printing system incorporates an opto-electronic sensor for sensing the movement of a vane fixed to the armature of the print mechanism. The output signal generated by the sensor is employed to define periods for measurement of the speed... | 10/15/1985 |
| 4538930 | Adaptive print hammer damper A circuit for controlling the hammer velocity of an impact printer is described. A velocity sensor generates a signal which is a function of hammer position. This is compared to a reference voltage, and a drive pulse is generated if a velocity correction ... | 09/03/1985 |
| 4530280 | Printing hammer assembly with a hammer dampener comprising two opposed permanent magnets A printing hammer assembly for use in impact printers includes a printing hammer which has an impact surface and an armature and which is supported to be movable in a reciprocating manner along its longitudinal axis, a driving solenoid which drives to mov... | 07/23/1985 |
| 4529326 | Print hammer for printers and typewriters A print hammer for printers and typewriters comprises a hammer rod (11) which is axially movable in a housing (17, 18). The hammer rod is biassed towards a rest position by a spring and can be moved to a print position by a drive means, for example a sole... | 07/16/1985 |
| 4523867 | Bi-directional drive print wire actuator with forward-velocity and reverse-position closed loop feedback control The present invention provides a bi-directional drive printer actuator with position feedback control and methods of operation to optimize the performance of impact type printers. By monitoring the position of the print wire, a forward input power pulse c... | 06/18/1985 |
| 4522122 | Fast impact hammer for high speed printer An impact hammer assembly, suitable for high speed MICR printing, is disclosed. The impact hammer assembly comprises an impact hammer having first and second flanged portions respectively positioned at first and second ends along a first longitudinal surf... | 06/11/1985 |
| 4496253 | Impact hammer The inventor discloses a hammer assembly suited for use in generating impact for printers, such as printers using daisy-wheels. The assembly comprises an electromagnetic assembly for selectively producing an electromagnetic field across an air gap. A hamm... | 01/29/1985 |
| 4430936 | Striker mechanism for a high speed serial printer A striker mechanism for a high speed serial printer, for example of the daisy wheel type, includes a hammer movable axially towards the platen under the action of an electro-magnet whose armature carries a striker, and against the action of a return sprin... | 02/14/1984 |
| 4407194 | Print hammer An improved print hammer incorporating crossed-spring support wires having a round cross section so as to render the hammer relatively flexible in a direction lateral to hammer travel during printing. The spring wires are connected between a lower body po... | 10/04/1983 |
| 4404901 | Striker assembly for line printers A striker assembly for operating the printing hammer in a high speed impact-type line printer. The assembly is a simple, low cost unit having a minimum of components. The striker body is of one-piece molded construction having a head and neck portion. An ... | 09/20/1983 |
| 4401026 | Free flight hammer for impact printer The hammer of a serial impact printer comprises a solenoid including a stationary magnetic structure with an opening extending therethrough and a movable magnetic structure adapted to move through the opening. The movable magnetic structure is accelerated... | 08/30/1983 |
| 4395945 | Hammer bank assembly A hammer bank assembly for use in line printers. The assembly includes an extruded metal rear frame having a uniform thickness and a plurality of machined mounting surfaces which are machined in accurate relationship with respect to one another. A pair of... | 08/02/1983 |
| 4388861 | Bank for accommodating several print hammer units Bank for accommodating adjacent ram units, each of which consists of a flat, narrow frame. An electromagnetic actuator for a ram, which is guided in two bores of the frame, is positioned in a recess of the latter. For accommodating and guiding the individ... | 06/21/1983 |
| 4360088 | Dynamic rebound-resonance suppression Means and method for harnessing inertial forces so as to suppress rebound-resonance resulting from abruptly stopping a moving body. The inertial forces are generated by a movable mass yieldably and resistently coupled to the moving body. The movable mass ... | 11/23/1982 |
| 4348119 | Bounce control system for moving coil printing element In a drive circuit for an electromagnetic printing element of an impact printer, a drive pulse drives the printing element from a backstop toward a record medium to print indicia. A voltage comparator senses the change in the induced voltage in the printi... | 09/07/1982 |
| 4333398 | Driving force control system for impact printer In a drive circuit for an electromagnetic printing element of a matrix impact printer, a drive pulse drives the printing element from the backstop toward a record medium to print indicia, and a damping pulse, applied to the printing element after its retu... | 06/08/1982 |
| 4331077 | Printing element with shock absorber feature A marking element assembly including a yoke which is driven by an arm. The arm is connected to a slider block which transfers motion to the yoke. The yoke has an interior channel for slider block free motion, with drag, after a marking element connected t... | 05/25/1982 |
| 4329921 | Damping device for an electromagnetically driven printing hammer A damping device for a printing hammer which is driven by an electromagnetically actuated pivotable armature has a circuit associated therewith for operating the electromagnetic coils which generates a high excitation current for rapid acceleration of the... | 05/18/1982 |
| 4313682 | Final positioning vibration damping device for type disc typewriters Disclosed is a device for use in type disc typewriters or similar machines having types carried by spokes radially extending from a common hub which is rotated to position a selected spoke at a print position. The device is operative to lock the type disc... | 02/02/1982 |
| 4306817 | Bar code printing mechanism A mechanism using a stepping motor as the prime mover for a bar code printing head or hammer mounted on the end of a pivotal lever. Where the output code (such as the postal code used in the U.S.) requires a full bar as one binary indication and a half ba... | 12/22/1981 |
