By Control Of One Or More Load Circuits Patents (Class 307/34)
  • Patent number: 4334310
    Abstract: The generation of internal circuit noise due to the switching of differing numbers of bilevel data lines is suppressed by maintaining the energizing current substantially constant with widely varying amounts of current drawn by varying the current drawn by redundant driver circuits, which also generate parity or check signals, to compensate for the difference in current drawn by the designated data driver circuits. The number of redundant driver circuits is reduced by loading the second and further redundant driver circuits for drawing currewnts related to the current drawn by the first redundant driver circuit by succeeding powers of two. Further suppression in internal circuit noise obtains with gating of all driver circuits at the time switching occurs. Control circuitry comprising conventional full adder circuits arranged for expressing the number of data signal lines in a given level is advantageous for controlling the redundant driver circuits and for generating check bits at the same time.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: June 8, 1982
    Assignee: International Business Machines Corporation
    Inventor: Gerald A. Maley
  • Patent number: 4323839
    Abstract: A regulating transistor is connected between a constant current load and a constant voltage load. A control circuit responds to voltage variations of the constant voltage load to adjust the transistor whereby a constant current and a constant voltage and supplied to both loads. In a vidicon camera circuit a focusing coil presents a constant current load and a heater element presents a constant voltage load.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: April 6, 1982
    Inventors: Kazuyoshi Imazeki, Shozo Iguchi
  • Patent number: 4323962
    Abstract: A half-wave and a full-wave rectifier using transistors as rectifying elements have independently controlled multiple output voltages obtained from a single power supply. The transistor used as a rectifying element has its turn-on controlled thus allowing voltage control by phase control action.
    Type: Grant
    Filed: February 2, 1981
    Date of Patent: April 6, 1982
    Assignee: General Electric Company
    Inventor: Robert L. Steigerwald
  • Patent number: 4272692
    Abstract: A plurality of modules, each adapted to generate repetitive RF pulses are connected to a common coarse DC power supply. Each of the modules, which include a pulsed load, has a switching transistor connected in series with the load, and a precise voltage connected to its base to regulate the voltage during each of the individual pulses. A capacitor may be connected in each of the modules for improving the rise time of the individual pulses.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: June 9, 1981
    Assignee: Westinghouse Electric Corp.
    Inventor: Alfred W. Morse
  • Patent number: 4189670
    Abstract: In a power circuit arrangement, there are a plurality of voltage stabilizers each including a reference voltage source, a circuit for comparing the output of the respective voltage stabilizer with a reference voltage, and a voltage control element responsive to the output of the comparing circuit. The reference voltage for at least one of the voltage stabilizers is provided by an independent element, and the reference voltage for the remaining voltage stabilizers is formed on the basis of the output voltage of the other voltage stabilizers. When the output voltage of any one of the voltage stabilizers becomes zero, all of the other voltage stabilizers similarly have their output voltages reduced to zero.
    Type: Grant
    Filed: June 13, 1978
    Date of Patent: February 19, 1980
    Assignee: Sony Corporation
    Inventor: Makoto Tanahashi
  • Patent number: 4167679
    Abstract: In an electrical load control system, an analog signal representing the actual rate of power being consumed by a plurality of loads has a nominal level when the actual rate is at a desired rate, or set point. As the level of the analog signal deviates from its nominal level, the electrical load control system functions to add or shed one or more of the loads to maintain the actual rate at the set point. During times of low power consumption, the electrical load control system may not act to optimize energy usage if the set point is not lowered. A set point control circuit is provided which senses the on/off status of one of the loads, or control load, and which provides a set point modification signal whose level represents a desired reduction in the set point and which varies in a predetermined range between minimum and maximum levels representing, respectively, no reduction in the set point and a maximum reduction in the set point.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: September 11, 1979
    Assignee: Pacific Technology, Inc.
    Inventors: Warren L. Leyde, Don R. Hall
  • Patent number: 4163906
    Abstract: A time division switching regulator wherein a single power source is connected to a plurality of inverters the outputs from which are rectified and smoothed and appear at respective output terminals, and the output voltages at said terminals are sequentially monitored and are compared with a reference voltage to generate an error signal in response to which the output from the corresponding inverter may be controlled or regulated.
    Type: Grant
    Filed: August 24, 1977
    Date of Patent: August 7, 1979
    Assignee: Nippon Electronics Memory Industry Co., Ltd.
    Inventor: Hironori Shimamura
  • Patent number: 4125782
    Abstract: A demand controller includes a microprocessor which is programmed to input data from switches on a control panel and output data to a set of eight circuits which control the operation of loads. Peak power demand is maintained below a preset DEMAND OBJECTIVE by selectively shedding these loads. The shed level for each load is not fixed, but instead, varies as a function of the rate at which total power demand is increasing. This rate is calculated by the microprocessor and the resulting shed level index (i) is employed to select the proper shed level for each load from a stored shed level matrix.
    Type: Grant
    Filed: February 15, 1977
    Date of Patent: November 14, 1978
    Assignee: Allen-Bradley Company
    Inventor: Harold J. Pollnow, Jr.
  • Patent number: 4100428
    Abstract: The control system permits limiting the electrical demand of a distribution network to a desired maximum value by regulating the temperature of one or more thermal loads with heating or cooling elements; this system includes: means for measuring the instantaneous demand of the network; means for measuring the instantaneous temperature of each of the thermal loads; means for comparing the demand of the network to the desired maximum value; means for comparing the measured temperature to the desired temperature for each of the thermal loads; and means for disconnecting or for connecting in response to the information obtained by the comparison, a fraction of the elements which is proportional to the difference between the measured temperature and the desired temperature.
    Type: Grant
    Filed: June 15, 1976
    Date of Patent: July 11, 1978
    Assignee: H.O.P. Consulab Inc.
    Inventors: Jules Delisle, Adrien Leroux, Serge Mathieu
  • Patent number: 4034212
    Abstract: A computerized welding control system which is capable of controlling a large number of welding heads from a single processor, the processor being the timing instrumentality for the various portions of the welding cycle. The system also includes standard welding circuitry to control the percent heat and the control of the first electrical cycle of the welding cycle. The system includes a data entry terminal for a set of welders within the group controlled by a single processor, the terminal being capable of addressing the computer to determine the time stored therein for various functions within the welding cycle for a particular machine within the group controlled by the terminal unit. The terminal unit also includes capability of changing the times associated with each portion of the welding cycle.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: July 5, 1977
    Assignee: Weltronic Company
    Inventor: Charles F. Paxton
  • Patent number: 3947746
    Abstract: A single-ended dc-to-dc converter which comprises a transformer having a primary winding which is connected to a d-c voltage source via a switch, a secondary winding which is connected to a load via a series valve and a choke, and a remagnetizing winding. In order to obtain an output voltage from the converter which is higher or lower, as desired, than the d-c supply voltage, provision is made for a first controlled by-pass valve to be shunted across the series connection of the secondary winding and the series valve and for a second controlled by-pass valve, poled in the direction of the load current, to be connected in parallel with the series connection of the choke and the load.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: March 30, 1976
    Assignee: Siemens Aktiengesellschaft
    Inventor: Harald Heinicke