Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 6695498 | Printer compact coil winding system An impact printer having one or multiple lines of hammers on a hammerbank for impacting a print ribbon against a print media after release by one or more electrically energized coils in a magnetic circuit with one or more pole pieces retaining the hammers... | 02/24/2004 |
| 5857787 | Printer and motor having a balanced buck drive A dot matrix printer and motor having hammers forming in part a hammerbank and a counterbalance mechanically linked to the hammerbank with a link to the position of the motor. The motor includes coils positively driven and then negatively driven after cur... | 01/12/1999 |
| 4806034 | Write head controller with grid synchronization A system for precisely positioning a printing element relative to a rotating drum, as in a drum printer, employs two position signals for alignment purposes. A pair of linear grids is disposed along a path of travel of the printing element for generating,... | 02/21/1989 |
| 4740095 | Printer A printer has a mechanism for moving a print head from a print position to a non-print position, a drive source for driving the mechanism, and connection gears for transmitting a drive force resulting from the source to the mechanism. The printer is provi... | 04/26/1988 |
| 4558964 | Print element and printing apparatus using same A printing apparatus having a simple construction is constituted by a print element with a plurality of resilient spokes which have type elements disposed vertically thereon and in two rows around the element and extend upwardly from a disc base in a cyli... | 12/17/1985 |
| 4512675 | Serial printer A serial printer suitable for use in desk-top calculators or the like. The serial printer has a rotary shaft rotatable together with two type wheels. The power supply to the rotary shaft is made by a motor which operates continuously only in one rotationa... | 04/23/1985 |
| 4478143 | Printer The printer includes a common feed and eject portion constructed as friction belt drive; it further includes a friction drum and a print head and cutter between the drum and the ejection portion which participates in the advance during printing but runs a... | 10/23/1984 |
| 4455937 | Printing device A printing device of serial type capable of printing characters and symbols in a plurality of different colors on a recording sheet, which is provided with a plurality of character wheels for different colors supported on one and same rotational shaft, ea... | 06/26/1984 |
| 4443125 | Printer A printer having a printing head which prints characters across lines on a recording medium. The printer includes a frame having a driving shaft rotatably supported thereon and a motor for rotating the driving shaft in first and second directions. The pri... | 04/17/1984 |
| 4414893 | Serial printer A serial printer suitable for use in desk-top calculators or the like. The serial printer has a rotary shaft rotatable together with two type wheels. The power supply to the rotary shaft is made by a motor which operates continuously only in one rotationa... | 11/15/1983 |
| 4398460 | Printer A printer having plural type font wheels for function symbols of different colors and plural type font wheels for numerals of different colors fitted on a rotary shaft, wherein the plural type font wheels for numerals are displaced along the shaft for eac... | 08/16/1983 |
| 4386564 | Serial printer A serial printer wherein a print head is reversibly displaced transverse to a print medium by an open looped grooved rotating cylindrical cam is provided. A unidirectional drive shaft is operatively coupled to the cam by a drive gear engaged with planet g... | 06/07/1983 |
| 4294554 | Driving device for a printing carriage provided with a print head A driving device for a printing carriage (20) with print head (22) including printing elements (24) which print characters on a data carrier includes a motion converting means (14) with a closed gear path (16) converting the rotational movement of a motor... | 10/13/1981 |
| 4250808 | Printer A small-sized and light weight printer which can suitably be incorporated in a desk-top calculator or the like. The printer has a simplified mechanisms for driving of a printing head, a paper feed and a printing control, and can operate stably with a redu... | 02/17/1981 |
| 4208139 | Carriage position control in a printer of the carriage traveling mode A detection means is provided for generating an analog signal in response to a rotation angle of a servomotor which drives a carriage in a printer. A servomotor drive circuit is responsive to a print command from an input means and the analog signal from ... | 06/17/1980 |
| 4123182 | Cam drive for matrix print heads and the like In a print head assembly for calculators and the like, the print head is reversibly driven in a print and return direction transversely of the direction of advancement of the recording medium by a drum segment having a cam drive in the form of an endless ... | 10/31/1978 |
| 4114750 | Printer system having local control for dynamically alterable printing A printer system having local control for dynamically positioning a print head relative to a print medium utilizing positioning and print data signal inputs, including a control unit for receiving and storing data inputs, the control unit including circui... | 09/19/1978 |
| 4112840 | Driving device for a print head A driving device for a print head including printing mechanism actuated at predetermined times for marking characters on a data carrier carried by a print roll, comprising motion converting mechanism comprising a housing including an interior continuous g... | 09/12/1978 |
| 4072101 | Linear actuator printer carriage A linear actuator for positioning a print assembly parallel to a line on which characters are being printed is disclosed. The linear actuator includes a three-sided open structure magnetic circuit fabricated from rectangular pieces of slab magnets positio... | 02/07/1978 |
| 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 |
| 4027761 | Matrix print head impact energy control A matrix printer impact energy control is disclosed wherein the impact energy supplied to the drive solenoids of matrix print heads is maintained substantially constant notwithstanding variations in the printer power supply output. The hammer power supply... | 06/07/1977 |
| 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 |
| 3988984 | Printing device comprising a distance roller A printing device having a printing head opposite a cylindrical anvil. The printing head is displaceable along a guide rod which is connected by pivotable arms to a pressure roller which is spring-biased against the anvil. The arms pivot about an axis par... | 11/02/1976 |
| 3941230 | Backlash compensated linear drive method for lead screw-driven printer carriage A method of effecting time-linear travel of a lead screw-driven, carriage-mounted print head during the print cycle encompassed within a predetermined period of each motor-initiated advancement thereof. This is accomplished by incorporating a predetermine... | 03/02/1976 |
| 3941228 | Electromagnetically operated printer A printer, suitable for operation by an electric computer, includes a traveling carriage. The carriage carries a type-head that is vertically and rotatably shiftable to properly orient a type element for printing. Movement of the carriage, as well as vert... | 03/02/1976 |
