Patents Examined by Derek Jennings
  • Patent number: 4419589
    Abstract: Multi-stage electrical load control apparatus includes current transformers for sensing the on and off status of electrical load elements and a predetermined priority system selectively allows different electrical load elements to be turned on and off in response to the sensed load status.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: December 6, 1983
    Inventor: James W. Ross
  • Patent number: 4417151
    Abstract: A universal input-output apparatus has: a controllable source of electrical energy including at least one drive source having an output terminal and a return terminal; an electrical energy measuring device including at least one energy sensor having an input terminal connected to the output terminal of the controllable source of electrical energy; a twin leaded line having the first ends thereof connected to the output and return terminals of the drive source, respectively; and an integrity tester in the form of a zener diode connected across the second ends of the first and second leads, respectively, a first terminal connected to one of the second ends, a second terminal connected via a unidirectional conductor to the one second end and a third terminal connected via a resistive device to the one second end.
    Type: Grant
    Filed: March 11, 1982
    Date of Patent: November 22, 1983
    Assignee: Distributed Control Systems, Inc.
    Inventors: George Klein, Solomon Manber, Marvin Sudhalter, Alvin Taylor
  • Patent number: 4412227
    Abstract: A thermal head reading/writing device includes a thin-film transistor element which may be switchably operated for printing in response to the variation of a signal voltage applied to a gate electrode.
    Type: Grant
    Filed: June 9, 1982
    Date of Patent: October 25, 1983
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Toshihisa Hamano
  • Patent number: 4407003
    Abstract: A thermal printer is provided in which a source voltage is detected and the driving time of a thermal head as well as the driving time of a motor for driving the thermal head, are suitably controlled according to the result of the detection.
    Type: Grant
    Filed: January 18, 1982
    Date of Patent: September 27, 1983
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroshi Fukui
  • Patent number: 4405869
    Abstract: A computing system is disclosed including a new optical parametric logic gate. The parametric logic gate includes an optical resonant cavity having nonlinear optical characteristics, such that the cavity will generate a subharmonic output signal having a frequency f when supplied with a pump frequency of 2f. The subharmonic output signal may have one of two possible phases which differ by .pi. radians to one another, and correspond to binary 1 and 0 respectively. A bias signal having a frequency f is supplied to the resonant cavity. Optical input signals are summed with the bias signal to produce a resultant seed input signal having one of the two phases. The phase of the seed input signal is imparted to the phase of the output subharmonic. The type of logical operation which the parametron performs can be controlled by adjusting the power of the bias signal. The subject disclosure also includes a description of computing systems having various pump arrangements.
    Type: Grant
    Filed: August 27, 1982
    Date of Patent: September 20, 1983
    Inventor: George A. May
  • Patent number: 4400625
    Abstract: A transfer compensation circuit for use in a standby A-C power system which compensates for the transient in system output voltage which occurs when the system transfers from the conventional A-C input voltage to the standby power system. The compensation is dependent on the total load on the system at the instant of transfer. The total load includes both the external load connected to the system load and the battery in the standby supply if the system normally functions to provide charging current to that battery.
    Type: Grant
    Filed: November 30, 1981
    Date of Patent: August 23, 1983
    Assignee: Reliance Electric Company
    Inventor: Sam W. Hussey
  • Patent number: 4400629
    Abstract: A three-phase circuit, either load impedances or transformer windings for feeding such load impedances, are connected in a delta circuit configuration by a first group of controllable semiconductor elements and in a star circuit configuration by a second group of such elements. All elements are fired, but at different phase angles for operatively establishing a star, a delta, or a mixed type of connection.
    Type: Grant
    Filed: July 2, 1982
    Date of Patent: August 23, 1983
    Assignee: Schaltbau Gesellschaft mbH
    Inventor: Ernst Kratzmair
  • Patent number: 4400626
    Abstract: A power generating and distribution system employs primary and emergency back-up standby generators with the primary generator normally powering a conversion supply from which critical supplies are directly connected to a user system and non-critical supplies are selectively connected to the user system through electronic switching devices. The switching means are activated by a monitor control which compares a sample of the primary generator voltage level with a reference level of the generator output powering the conversion supply and generates a control signal to close the electronic switching devices only when the monitor sample exceeds the monitor reference.
    Type: Grant
    Filed: February 24, 1982
    Date of Patent: August 23, 1983
    Assignee: Rockwell International Corporation
    Inventor: Larry D. Lacy
  • Patent number: 4399731
    Abstract: An apparatus for automatically composing a music piece is provided by comprising a memory preliminarily storing plural kinds of pitch data. From this memory, at-random extraction is made of those pitch data agreeing with predetermined music conditions, and they are timewisely successively delivered out to be imparted durations, respectively, to form a composition data consisting of plural sets of pitch data and duration data amounting two to four measures to make a music piece. This composition data may be used for generation of music sounds, and/or display of music score image on a screen of a CRT device, and/or printing-out of a score by a printer, to be utilized in the sound-dictation training and/or performance exercise in providing, for example, musical education.
    Type: Grant
    Filed: August 4, 1982
    Date of Patent: August 23, 1983
    Assignee: Nippon Gakki Seizo Kabushiki Kaisha
    Inventor: Eiichiro Aoki
  • Patent number: 4400707
    Abstract: A recording medium in which a substrate, an inorganic material layer adapted to absorb light and generate heat, a first organic material layer made of an organic matter containing metal, and a second organic material layer adapted to be deformed or removed by heat are successively stacked. A metal salt of an organic acid, or organic metal compound etc. are employed for the first organic material layer. Owing to the presence of this layer, the recording medium exhibits a stability against changes in the ambient temperature.
    Type: Grant
    Filed: August 6, 1981
    Date of Patent: August 23, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Munehisa Mitsuya, Motoyasu Terao, Sakae Ota, Yoshio Taniguchi, Toshimitsu Kaku, Shinkichi Horigome
  • Patent number: 4398098
    Abstract: An electronic latching circuit is described for incorporation into an electronic equipment which includes a battery, a load and a power supply. During shipment or storage of the equipment, the electronic latching circuit electrically isolates the battery from the load. The first time that the equipment is put into operation and turned on after shipment or storage, the electronic latching circuit automatically permanently connects the battery to the load. Once connected to the load the battery remains connected to the load, even when the equipment has a power failure, the power supply fails or the equipment is turned off.
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: August 9, 1983
    Assignee: NCR Corporation
    Inventor: Jerry M. Minchey
  • Patent number: 4390882
    Abstract: In a process of image recording by scanning a recording material with a light beam modulated by an image signal, the density of the recorded image is adjusted by controlling the light intensity during a predetermined interval using a clock pulse for picture elements, recording an image for a predetermined time within the predetermined interval, and changing the predetermined recording time for the entire image or only portions thereof. The recording time is changed in a very simple manner, for example, by operating a variable resistor.
    Type: Grant
    Filed: November 5, 1981
    Date of Patent: June 28, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yuji Ohara, Kazuo Horikawa
  • Patent number: 4390794
    Abstract: Circuit for the delayed switch-on of a supply voltage in an electric apparatus which has at least a first and a second supply terminal, the series arrangement of the emitter-base path of a first transistor and the collector-emitter path of a second transistor being arranged between the first and the second supply terminals, the base of the second transistor being connected to a voltage divider provided between the collector of the first transistor and the second supply terminal.
    Type: Grant
    Filed: January 25, 1982
    Date of Patent: June 28, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Wilhelmus G. Kuiper, Anne Klaassen
  • Patent number: 4385302
    Abstract: A plurality of thermal head assemblies can be arranged around a single backing roller to minimize the distance between recording stations. Synchronization marks recorded on the paper at a first station can be detected between recording stations to control the timing of image recording at the later stations.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: May 24, 1983
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Haruhiko Moriguchi, Fujio Moriguchi, Takashi Ohmori
  • Patent number: 4381458
    Abstract: A back-up electrical power supply module provides a back-up supply for a plug-in volatile electrical device such as a memory module. The memory module has a dual-in-line pins which engage socket openings of a standard dual-in-line circuit board connector. The back-up supply module is mounted on top of the memory module and has dual-in-line pins which contact corresponding ones of the pins of the memory module and corresponding socket openings. In this way the back-up supply module and the memory module can be unplugged as a unit and when unplugged, the back-up supply will maintain the contents of the volatile memory module intact.
    Type: Grant
    Filed: August 4, 1981
    Date of Patent: April 26, 1983
    Assignee: Racal Microelectronic Systems Limited
    Inventors: Michael J. Anstey, David F. Brown