| Patent Number |
Title Of Patent |
Date Issued |
| D268116 |
Typewriter |
March 1, 1983 |
|
| 4334790 |
Type disc typewriter with electronic positioning control |
June 15, 1982 |
| Keyboard generated signals are digitally encoded and converted to varying voltages for application to a coil for generating magnetic forces. The magnetic forces act on a spring mass system including a type disc to rotate the type disc to a selected angular position. The rest position of |
| 4330354 |
Apparatus for monitoring dispensation of glue in an automatic glueing machine |
May 18, 1982 |
| The invention relates to a monitoring device for automatic gluing machines, particularly for gluing metal parts. When no glue has been fed the automatic changing of a turntable, for example, supporting workpieces to be glued, is interrupted. This is accomplished by means of a probe d |
| 4313681 |
Type disc positioning mechanism |
February 2, 1982 |
| Mechanism responsive to discrete character signals is provided for selectively rotatably positioning a type disc clockwise or counterclockwise from a home position to present the selected character on the type disc for printing. The mechanism comprises a driven lever pivoted intermed |
| 4297040 |
Method and apparatus for positioning a type disc in a balanced force system |
October 27, 1981 |
| A method and apparatus for positioning a type disc in a balanced force system wherein applied selective forces to effect angular positioning movement from an old to a new position are brought into equilibrium with opposing spring forces. Electronic positioning controls are provided to |
| 4286889 |
Error correcting typewriter with electronically controlled backspacing to facilitate perfect ove |
September 1, 1981 |
| An error correcting typewriter wherein a backspace correction key is operative to read an incorrect character from memory, to in turn reversely move a stepper motor controlled carriage twice the width of a character in error and then forwardly the width of the character in error and then |
| 4278358 |
Type carrier with impression control formation |
July 14, 1981 |
| A daisy wheel print element provided with hammer energy absorbing formations to obtain substantially uniform print density for different print area types. |
| 4268181 |
Ink and error correction ribbon assembly |
May 19, 1981 |
| An inked and error correction ribbon assembly comprising an inked ribbon cassette adapted to be pivotally mounted in a machine and an error correction ribbon holder having support arms which embrace the inked ribbon cassette and pivotally support the error correction ribbon holder ab |
| 4239406 |
Hinged single piece aligning scale for typewriters |
December 16, 1980 |
| A single piece paper guide device incorporating an aligning scale which is movably hinged to allow movement from a working position to a service position. |
| 4239402 |
Detachable wire matrix print head mounting structure |
December 16, 1980 |
| A wire matrix print head is configured for detachable mounting in a complementary shaped support and held thereto by a spring device which urges the complementary surfaces of the head and its support in secure contact with one another. |
| 4215944 |
Single keylever multiple action control for typewriters |
August 5, 1980 |
| A typewriter having a carriage return line indexing key to initiate in parallel a powered carriage return and a powered line indexing operation is provided with linkage associated with the carriage return action which assures initiation of the line indexing operation should the keylever |
| 4209260 |
Wire matrix print head having reversible wire drive armatures to allow wire wear compensation |
June 24, 1980 |
| A wire matrix print head having print wires subject to wear at their printing ends are biased by return springs against one side of one end of armatures, the other sides of which bear against a gap adjusting ring. The other end of each of the armatures is spaced by a predetermined gap fr |
| 4203304 |
Flexible shaft coupling |
May 20, 1980 |
| A flexible shaft coupling for connecting a drive and a driven shaft comprises an axially stacked plurality of flexible metal discs which are connected to one another at oppositely spaced peripheral points with the directly connection between one disc and its neighboring disc on one side |
| 4198170 |
Single element typing for left to right or right to left letter feeding |
April 15, 1980 |
| A carriage supporting a single type element is couplable either to the upper run or the lower run of a looped cable drive system for left or right or right to left letter feeding movement under control of an escapement pawl carrier associated with a unidirectional control rack and dr |
| 4176976 |
Mosaic printing head |
December 4, 1979 |
| Printing members comprising a mosaic printing head are driven by flexural bending elements which are electrically actuated to produce a desired printed pattern. The bending elements may take the form of piezoelectric strips or diaphragm pieces which are supported by bearings located at |
| 4174182 |
Needle printing head |
November 13, 1979 |
| A plurality of printing needles forming an array are mounted in a printing head and are periodically driven to impact a printing ribbon onto a recording medium. The printing head contains a brake for each needle so that selected needles can be prevented from striking the printing ribbon |
| 4168127 |
Constant rate ribbon winding mechanism |
September 18, 1979 |
| A mechanism for winding a ribbon on a take-up spool effects a constant winding rate as the diameter of the wound ribbon on the spool increases. A wrap spring intermittently drives a gear which rotates the spool in a stepwise fashion, the free end of the wrap spring being reciprocated by |
| 4164698 |
Battery charging circuit |
August 14, 1979 |
| A circuit for use in charging a battery from a current source, such as a solar cell, includes a Zener diode, a current limiting resistor in series with the Zener diode, and a switch which shunts the resistor. In periods of high current output from the solar cell, the resistor is shunted |
| 4136977 |
Mount for a consumable electrode matrix printer |
January 30, 1979 |
| A mount for a consumable electrode printer comprises a member which slidably receives an array of consumable electrodes which are biased to a printing position, a clamp for gripping the electrodes to prevent the sliding thereof, and a release for the clamp to allow the biased electro |
| 4131372 |
Endless fabric ribbon cassette for typewriters or like machines |
December 26, 1978 |
| A fabric ribbon cassette wherein an endless folded fabric ribbon is drawn across the printing point of a typewriter or like machine by feed gears which are couplable to and driven by machine mounted feed gears which are also designed to feed cassette supported single pass or multistrike |
| 4117739 |
Gear drives with direction of rotation reversal |
October 3, 1978 |
| A uni-directionally rotated clutched driving gear having arcuate segments of gear teeth acts sequentially on two idler gears to effect a two-speed bi-directional rotation of a driven gear. The driven gear may be attached to the drive shaft of the character wheels in a recording calculato |
| 4108557 |
Error correcting typewriter |
August 22, 1978 |
| An error correction system for a typewriter in which a silent type action with a blank type face is operatively connected and synchronized to initiate a backspace action and elevate and feed an error correction ribbon in advance of the striking of the blank type face against the space |
| 4064982 |
Printing ribbon |
December 27, 1977 |
| An improved printing ribbon for use between a writing electrode and a permeable counterelectrode across which a pulse of predetermined magnitude and duration is applied. The material of the ribbon is such that it experiences multiple electric breakdowns causing it to be propelled thr |
| 4031995 |
Keyboard actuated paper insertion and ejection mechanism |
June 28, 1977 |
| A typewriter mechanism responsive to an operator-controlled key automatically inserts a sheet of paper between the platen and paper bail in preparation for printing by raising the bail as the platen-entrained paper advances with the platen and then restoring the bail when the paper h |
| 4008794 |
Type carrier print deflection blocking means for a single-element printer |
February 22, 1977 |
| A single-element type carrier printing mechanism is provided with an element movable to block tangential deflection of the type carrier at printing impact with the platen, is normally disengaged from frictional contact with the type carrier during rotational positioning of the type c |
| 3995729 |
Impactless printing apparatus |
December 7, 1976 |
| Disclosed herein is a thermoelectric printing method and apparatus pertaining to the technology which avoids the mechanical impact of printing elements upon an ink ribbon, as used in office machines or the like. In accordance with the method, an electrically insulating support of sub |
| 3980169 |
Impact control for single element printer |
September 14, 1976 |
| A single element type carrier having type characters with different printing areas is impacted against a recording medium with different impact intensities substantially corresponding to the different printing areas to effect uniform printing. The type carrier is driven in a printing |
| 3978736 |
Pilgrim step indexing mechanism |
September 7, 1976 |
| A pilgrim step indexing mechanism provided with oppositely facing toothed ratchet wheels of the same pitch is associated with a single indexing pawl and an associated detent spring which not only detentably holds the ratchet wheels but also biases the indexing pawl to engage the ratchet |
| 3977511 |
Ribbon loading device |
August 31, 1976 |
| A device for installing an inking ribbon in the ribbon fork of a typing machine comprising a housing having spool locating means for receiving and locating a ribbon pay-off and take-up spool, a guide in the housing for cooperating with locating means on the typing machine for locating th |
| 3967715 |
Intermittent drive system for typewriters |
July 6, 1976 |
| An intermittent drive for a single-element printing typewriter, calculator or similar machine. The drive comprises a drive shaft couplable via a cycle clutch to a driven shaft and a governor disposed on the driven shaft to couple it with and maintain it at the same speed as the drive sha |
| 3955204 |
Thermoelectric matrix printing head |
May 4, 1976 |
| A matrix printing head for use in a thermoelectric printing process has a plurality of electrical conductors which are fixed in predetermined relationship to one another. The conductors are disposed in a plurality of plates, and the plates are fixed in predetermined relationship to each |
