Patents Assigned to Kabushiki Kaisha Suwa Seikosha
  • Printing head for thermal printer
    Patent number: 4417257
    Abstract: A printing head for use in a thermal printer is provided. The printing head includes a substrate and an elongated smooth glaze layer is formed on a portion of the substrate. A plurality of heating elements are disposed on the glaze layer in a vertical column. Electrodes on the substrate selectively activate the heating elements to form characters on a thermosensitive recording paper.
    Type: Grant
    Filed: December 18, 1981
    Date of Patent: November 22, 1983
    Assignees: Epson Corporation, Kabushiki Kaisha Suwa Seikosha
    Inventor: Yoshihiro Mitsui
  • Serial printer
    Patent number: 4416557
    Abstract: A serial printer for use in portable electronic calculators and the like. The printer includes a single printing head having a plurality of characters divided into two groups circumferentially disposed therearound in a predetermined pattern. A selecting mechanism includes two ratchet wheels. The teeth on one ratchet wheel correspond to the positioning of the characters in the first group of characters and the teeth on the other ratchet wheel correspond to the positioning of the characters in the second group of characters. The ratchet wheels are moveable between a first position in which the first set of teeth are operative and a second position where the second set of teeth are operative.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: November 22, 1983
    Assignees: Epson Corporation, Kabushiki Kaisha Suwa Seikosha
    Inventor: Kenichiro Arai
  • Anti-chatter circuit for small portable apparatus
    Patent number: 4417155
    Abstract: A signal produced by connecting the electrical contacts of a mechanical switch is read into a circuit without chatter only when the switch is closed longer than a selected time period. A first memory stores and outputs a switch actuation signal on the occurrence of a read signal, and erases the stored signal when the switch actuation signal is removed. A second memory outputs a square wave pulse on the coincidence of a later read signal and the first memory output. Electrical noise lasting less than the selected time period does not produce an output. The selected time period can be varied by using independent, phase-shifted read signals for each memory.
    Type: Grant
    Filed: June 25, 1981
    Date of Patent: November 22, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Hitomi Aizawa
  • Low voltage regulation circuit
    Patent number: 4414503
    Abstract: A low voltage regulation circuit especially suitable for supplying current to high frequency loads is provided. The circuit comprises two P channel MOSFETs having the same threshold voltage and two N channel MOSFETs having repsectively different threshold voltages. The difference between the threshold voltages of the two N channel MOSFETs is provided as a constant output from the circuit, and load current is supplied from the output terminal. Circuit construction is simplified such that a low voltage regulation circuit with a small pattern area on the integrated circuit is obtained.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: November 8, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Masami Hashimoto
  • Mode coupled notched tuning fork type quartz crystal resonator
    Patent number: 4410827
    Abstract: A mode coupled tuning fork type quartz crystal resonator is mounted to a plug using support members of selected contour and dimensions to prevent acoustic energy loss from the plug and to avoid reduction in Q factor. A bend of 180 degrees in the support member and controlled length are factors in isolating fundamental and first overtone vibrations in flexure and fundamental torsional vibrations so as to reduce energy loss, maintain stable oscillation and improve the Q factor. A laterally extended base portion and/or tapered ends of the tuning fork arms enhance the beneficial results.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: October 18, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Shigeru Kogure
  • Correcting mechanism for hybrid display timepiece
    Patent number: 4408896
    Abstract: A timepiece having both analog and digital display includes a single stem operated correcting mechanism which adjusts each display independently. A correcting pinion, slidably mounted on a winding stem, provides for engagement at both ends thereof. In a first axial position of the winding stem, one end of the pinion engages a wheel train for correcting the analog display when the stem is rotated. In a second axial position of the winding stem, the correcting pinion engages a spring biased cam whereby electrical switches are intermittently opened and closed when the stem is rotated for correcting the digital display. Advancement or retardation of the displays depends on the direction of stem rotation.
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: October 11, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Toshimasa Ikegami
  • Method and apparatus for driving an ink jet printer head
    Patent number: 4409596
    Abstract: Conditions in the ink supply, nozzle and passages of an ink jet printer head are maintained in a state of dynamic equilibrium by application of a continuous flow of intermediate pulses to the piezoelectric transducer in the ejection system. The intermediate pulses are combined with selectively applied ejection pulses. Only the occurrence of an ejection pulse causes a droplet to be propelled from the printer head nozzle to the recording media. The intermediate pulses differ from the ejection pulses in amplitude, period or rate of change of the signal and transducer deflection produced, and occur at a frequency which prevents a return of static pressure equilibrium in the ink system between pulses. Gradation in printing can be produced from variation in time between intermediate and ejection pulses.
    Type: Grant
    Filed: August 11, 1981
    Date of Patent: October 11, 1983
    Assignees: Epson Corporation, Kabushiki Kaisha Suwa Seikosha
    Inventor: Hiroshi Ishii
  • Microprogram control circuit
    Patent number: 4408328
    Abstract: A microprogram control circuit interrupts high speed clock signals inputted to a processor when a HALT instruction issues from the processor in order to end operation at completion of a program. The clock signal is provided only when a program is in process. Should a program continue beyond a preselected time period without a HALT instruction, a control circuit including a timer detects this condition and interrupts the clock signals to the processor. Either an external signal or an automatic internally generated signal allows the clock signal to again enter the processor, reset the registers and address counter, and restart the program. In an alternative embodiment, abnormal operation causes the program to restart without interrupting the clock signals.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: October 4, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Yoichi Wakai
  • Electronic wristwatch
    Patent number: 4407019
    Abstract: An electronic wristwatch wherein a timing rate adjustment signal, representative of the amount of timing rate adjustment being effected and/or needed to be effected, is depicted. The electronic wristwatch includes a divider circuit for receiving a high frequency time standard signal from a quartz crystal oscillator circuit and for producing a low frequency timekeeping signal in response thereto. An adjustment circuit is coupled to the divider circuit for adjusting the frequency of the timekeeping signal by a predetermined amount. A converter circuit is adapted to be selectively coupled to the divider circuit to receive the adjusted low frequency timekeeping signal and, in response thereto, to produce a timing rate adjustment signal representative of the amount of adjustment applied in the low frequency timekeeping signal, and to produce a signal representative of the unadjusted oscillator frequency.
    Type: Grant
    Filed: February 19, 1981
    Date of Patent: September 27, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Yoshinori Futami, Tokumon Ogawa
  • Liquid crystal display device
    Patent number: 4405921
    Abstract: A light crystal display device which includes a liquid crystal panel and a light pen. The liquid crystal panel includes a plurality of display dots defined by spaced electrodes having a twisted nematic liquid crystal therebetween. The display dots are selectively driven by a drive circuit between light-transmissive and non-transmissive states in a predetermined flickering timing. The light pen selectively directs light to the display dots which is caused to flicker thereby. The flickered light is detected by a sensor in the light pen and produces positioning data signals representative of the sequence of dots selected.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: September 20, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Fumiaki Mukaiyama
  • High pressure chemical vapor deposition
    Patent number: 4404236
    Abstract: A process for carrying out chemical vapor deposition under increased pressure is provided. By carrying out chemical vapor deposition under increased pressure, a boundry layer of reduced thickness is formed which permit formation of a chemical vapor reaction film in the minute necking portions on the surface of the substrate formed during formation of the electrical components, such as a transistor or an integrated circuit. The step of chemical vapor deposition under increased pressure may be followed by chemical vapor deposition at normal or reduced pressure for forming a film of uniform thickness across the wafer.
    Type: Grant
    Filed: October 23, 1981
    Date of Patent: September 13, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Shoichi Komatsu, Seiichi Iwamatsu
  • Power circuit for electronic timepiece
    Patent number: 4404624
    Abstract: A power circuit for an electronic timepiece having a liquid crystal display includes a voltage regulation circuit, a voltage reduction circuit and a voltage booster circuit. In normal operation the voltage reduction circuit operates to drive the timekeeping circuits and extend battery life. When battery voltage drops due to heavy load, such as an alarm or lamp, the voltage regulation circuit and booster circuits operate to drive the timekeeping circuits and liquid crystal display respectively. The same transistors operate in the voltage reduction and booster circuits.
    Type: Grant
    Filed: July 31, 1981
    Date of Patent: September 13, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Suguru Yamazaki
  • Small impact printer with hammer mask
    Patent number: 4402261
    Abstract: A printer mask has spaced openings to allow impact therethrough of a hammer against characters arranged in circular columns along a character drum. The distance between the characters and mask changes automatically to compensate for changes in ambient temperature by using mounting materials of selected thermal coefficients of expansion. Uniform printing quality without marring the print paper is achieved with this mask construction.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: September 6, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Chihiro Ohtsuki, Hitoshi Mikoshiba
  • X-Ray lithography mask
    Patent number: 4401738
    Abstract: An X-ray mask including a pattern of X-ray absorbing material on a thin membrane is provided. The mask includes overlapping first and second patterns of X-ray absorbing material. This permits X-ray lithography printing of lines in complex patterns required for large scale integration. The X-ray mask can provide patterns of less than 20 A in thickness by X-ray irradiation.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: August 30, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Seiichi Iwamatsu
  • Speech synthesizer
    Patent number: 4400582
    Abstract: Storage space in this speech synthesizer is minimized by features including multiplex storage of voiceless phonemes and use of a word designator which selects in parallel information from a word memory and phoneme memory.
    Type: Grant
    Filed: May 27, 1981
    Date of Patent: August 23, 1983
    Assignee: Kabushiki, Kaisha Suwa Seikosha
    Inventors: Koji Takeda, Masao Akahane, Chitoshi Takayama
  • Small printer
    Patent number: 4398461
    Abstract: A printer of small overall size includes a plurality of typing wheels on the periphery of which are provided letters characters or symbols. At a printing position, a selection mechanism selects one of the plurality of letters, characters or symbols on each typing wheel. A printing mechanism prints the letter, character or symbols selected by the selection mechanism by applying a pressure thereto. A mechanism for feeding recording paper is arranged after the printing device in the feeding direction of the recording paper, and the printing mechanism moves in a direction opposite to the feeding direction of the recording paper after which pressure is applied to the printing device to effect printing.
    Type: Grant
    Filed: August 6, 1981
    Date of Patent: August 16, 1983
    Assignees: Shinshu Seiki Kabushiki Kaisha, Kabushiki Kaisha Suwa Seikosha
    Inventor: Isomu Koike
  • Electronic watch with demonstration display mode
    Patent number: 4398834
    Abstract: A demonstration function is included in an electronic watch capable of displaying the plurality of functional modes of the watch, which modes are subject to setting and correction by selective operation of a plurality of external members. The demonstration mode, induced by a selected operation of external members, displays in automatic sequence every function of the watch. Concurrently with the automatic, sequenced display of functions, display markers are visible indicating which external members need be operated to manually and independently produce each displayed function. Accordingly, the watch demonstrates and teaches its own operation and capabilities.
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: August 16, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Youichi Wakai
  • Power circuit for electronic wristwatch
    Patent number: 4397563
    Abstract: A power circuit for an electronic wristwatch is provided wherein voltage reduction circuit means is positioned intermediate a battery source and at least a portion of the circuitry of the timepiece to be driven by the battery source. The battery source is preferably a lithium battery. The voltage reduction circuit means include a capacitor and other circuit components formed on an integrated circuit substrate.
    Type: Grant
    Filed: May 1, 1980
    Date of Patent: August 9, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Matsuo Ichinose
  • Electronic timepiece including an animated display
    Patent number: 4397565
    Abstract: An electronic timepiece with an animated display is provided. The animated display includes flickering display elements for providing the animation. The timepiece includes a timekeeping circuit for generating actual time signals in at least hours and minutes and a corresponding time display region for displaying time in response to the time signals generated by the timekeeping circuit. The flickering animated display elements are driven independently of the timekeeping display.A digital display timepiece may include the animated display elements within a picture pattern. In this case, the flickering display elements form a part of the pattern. In a liquid crystal display timepiece, the flickering display elements may comprise portions of segments of display terminals and may be driven in response to seconds signals generated by a seconds counter of the timekeeping circuit.
    Type: Grant
    Filed: November 7, 1980
    Date of Patent: August 9, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Tomio Ota
  • Digital wristwatch
    Patent number: D269952
    Type: Grant
    Filed: April 20, 1981
    Date of Patent: August 2, 1983
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Noritaka Uchihori, Kenji Tanikawa