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| Number | Title | Issue Date |
| 5061100 | Printer mechanism with vertically displaceable printing means for use with horizontal sheet feed mechanism Front and rear printers for use with a document transport mechanism. The printers are identical in construction with each having a compact housing in which the associated print head is mounted. The housing has first and second side walls, a front wall whi... | 10/29/1991 |
| 4762435 | Lettering apparatus having a printer-keyboard interface A lettering apparatus having an improved interface feature including a printer portion, a data input portion and an interface assembly for connecting the printer with the keyboard comprising an electrical interface, a font motor interface and an initial a... | 08/09/1988 |
| 4723855 | Compact printer A compact printer has a type drum having at least one row of types, the types, including at least one space, being arranged on the periphery of the drum at regular intervals. The type drum is rotated by a stepper motor and a hammer member is provided for ... | 02/09/1988 |
| 4714361 | Stepper motor homing method and system A method or system for bringing a movable element of a stepper motor to its home position by mechanically blocking the movable element from further moving from the home position, wherein the movable element is moved in one direction by repeating an energi... | 12/22/1987 |
| 4544289 | Print disk positioning system A print disk positioning system is disclosed herein which provides rotational and lateral movement of a print disk (20) having raised or depressed characters thereon with the objective of locating the appropriate character within the jaws of a printing st... | 10/01/1985 |
| 4464071 | Detent apparatus for print wheel A serial printer comprising a print wheel having numerous type bearing spokes, each of which extends radially and which is provided with a type element on the tip of the spoke, a stepping motor for rotating the print wheel, a print hammer for striking the... | 08/07/1984 |
| 4462708 | Automated tape lettering machine An improved dry lettering printing machine of the type having a printing station, a rotatable disc or type font having embossed characters on the disc and a means for causing the machine to execute a print cycle which includes providing a color carrying r... | 07/31/1984 |
| 4459054 | Shared character selection, escapement and line advance system for serial printer A serial impact printer 11 includes a frame 15 mounted drive motor 47 coupled to a print wheel 31 to effect rotation thereof. The print wheel 31 is mounted on a movable print carrier 29 which serially moves from print position to print position along the ... | 07/10/1984 |
| 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 |
| 4258622 | Method of positioning a moving part and a printer operating in accordance with said method The invention comes within the field of equipment control. A method of shifting a moving unit from a first position to a second position by means of a stepping motor driven by a finite sequence of pulses, said moving unit being liable to oscillate about i... | 03/31/1981 |
| 4215302 | Control system for stepping motors, a method of operating stepping motors, and a method for selecting current patterns for stepping motors An open loop control device and method are provided for stepping motors. By energizing a motor so that the rotor motion is the result of a revolving field which is of piecewise constant speed and uniform field strength, the rotor can be brought to a stop ... | 07/29/1980 |
| 4142140 | Stepping motor control circuit A stepping motor control circuit incorporates two sources of pulses for driving a stepping motor, one of which has a frequency greater than the maximum frequency which the motor can follow. A pair of shift registers are used for effecting acceleration and... | 02/27/1979 |
| 4133422 | Typing machine A simplified and compact typing machine to be incorporated in an electronic calculator has a type wheel for presenting different numerals upon rotation. The type wheel is moved along a line of digits, i.e., laterally and in the generally horizontal direct... | 01/09/1979 |
| 4131840 | Circuit arrangement for setting a rotatable type carrier over the shortest path of rotation A circuit arrangement is provided for setting a type carrier, having character types arranged on the periphery thereof, from a present setting position to a new setting position over the shortest path of rotation, via a stepping motor, by means of pulse t... | 12/26/1978 |
| 4099106 | Composite pulse motor for a timepiece A compound pulse motor for driving a printer or the like comprising an armature having linear magnetic poles and rotational magnetic poles and a stator having stationary linear magnetic poles and stationary rotational magnetic poles. In operation, the lin... | 07/04/1978 |
| 4051942 | Printing apparatus A printing apparatus for an electronic calculator or the like comprises a first type wheel formed with mathematical operator symbols which is fixed to a spline shaft and a second type wheel formed with digits which is slidably mounted on the spline shaft ... | 10/04/1977 |
| 4039067 | Character printing device A printing device employs a printing drum on the peripheral wall of which a plurality of character type are arranged in the axial direction and in the circumferential direction. The axial movement and rotation of the drum are independently controlled by c... | 08/02/1977 |
| 4027764 | Apparatus for confirming the correct impression of printing characters An apparatus for confirming the correct impression of printing characters wherein any of the characters arranged in at least one line circumferentially extending on the peripheral surface of a cylindrical printing drum is designated by controlling the ope... | 06/07/1977 |
| 4025837 | Adaptive control circuit for a stepping motor Adaptive control circuit for a stepping motor in which each motor displacement from a present position to a target position is monitored and the proportion of acceleration signals to deceleration signals is modified as necessary to obtain minimal elapsed ... | 05/24/1977 |
| 3985218 | Low inertia impact printing means In a print head, a print wheel comprising the combination of a disk, a plurality of permanently magnetized printing members bearing characters thereon, and electromagnet imparting translation to the printing members by magnetic interaction, and also provi... | 10/12/1976 |
| 3986094 | Logic system for print ball tilt control A logic system for controlled energization of predetermined stepper motor phases for various optimal times employing a read only memory having a plurality of memory element arrays corresponding to predetermined stepper motor sequencing commands correspond... | 10/12/1976 |
| 3983985 | Typing device of flexible laminae with guide means and visibility A typing device comprises a character-bearing disc having a central part for being fixed on a selector shaft and a peripheral rim with a plurality of selectable flexible laminae. Each lamina carries a particular character and striking means flexes the sel... | 10/05/1976 |
| 3957151 | Character printing device A printing device employs a printing drum on the peripheral wall of which a plurality of character types are arranged in the axial direction and in the circumferential direction. The axial movement and rotation of the drum are independently controlled by ... | 05/18/1976 |
