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Pneumatic Shoe Lacing Apparatus
This invention provides a pneumatic shoe lacing apparatus for the pneumatic lacing of shoe.
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| Number | Title | Issue Date |
| 4495557 | Switching controller directly operable from AC A high response motor controller is disclosed which operates directly from a multi-phase AC power line without a DC link. The controller directly converts power from a fixed frequency multi-phase input to a D.C. or variable frequency output current. The o... | 01/22/1985 |
| 4485348 | Full wave envelope detector using current mirrors The fullwave bridge envelope detector comprises first, second, third, and fourth rectifier circuits each of which are coupled to receive first or second alternating input signals which are 180 degrees out of phase. The first and third rectifier circuits e... | 11/27/1984 |
| 4473784 | Power control circuit A circuit for controlling the power delivered to a load from an alternating current source includes a bridge rectifier coupled to the alternating current source for developing full and half-wave rectified signals in response thereto. The full and half-wav... | 09/25/1984 |
| 4473757 | Circuit means for converting a bipolar input to a unipolar output A circuit which accepts an input signal of either positive or negative polarity and produces an output signal having an open circuit voltage similar in amplitude to the input signal amplitude but having a defined polarity. A plurality of switching element... | 09/25/1984 |
| 4447868 | Regenerative rectifier circuit A three-phase regenerative rectifier provides power flow from ac to dc using a three-phase rectifier bridge. The reversal of the input ac voltage at the input frequency commutates current in the rectifier devices. A power transistor or field-effect transi... | 05/08/1984 |
| 4445054 | Full-wave rectifying circuit A full-wave rectifying circuit includes a first current conducting path for conducting a current corresponding to a positive input voltage applied to an input terminal, a second current conducting path for conducting a current corresponding to a negative ... | 04/24/1984 |
| 4433371 | Converter for converting an a.c. voltage into a direct current and an oscillator circuit using said converter A converter (300) for converting an a.c. voltage (SP) into a direct current (i3), characterized in that it comprises a first elementary converter (21) which, in response to the a.c. voltage (SP), provides a pulsed direct current (i1)... | 02/21/1984 |
| 4423456 | Battery reversal protection A semiconductor circuit for protecting battery powered electronic devices from damage due to polarity reversal. A metal oxide semiconductor is employed in series with the power source to switch the power input as appropriate. A first embodiment simply dis... | 12/27/1983 |
| 4412277 | AC-DC Converter having an improved power factor An AC to DC converter utilizes a first power converter for converting an AC signal to a DC signal under the control of a control signal. The control signal is generated by a control circuit that includes a first analog generator that provides a first sign... | 10/25/1983 |
| 4399499 | Bi-lateral four quadrant power converter A power converter which supplies AC or positive or negative DC output voltage with positive or negative current while isolating the output voltage from the input power source. This converter includes a pulse width modulator converts power amplitude signal... | 08/16/1983 |
| 4366433 | Output voltage-drop detecting apparatus technical field An output voltage-drop detecting apparatus added to a stabilized DC power source device which includes a power control circuit for controlling a DC input voltage to produce a DC output voltage of a specified value, a reference voltage source whose voltage... | 12/28/1982 |
| 4360866 | Linear full wave rectifier and method for providing full wave rectified signals A circuit and method for producing a signal that is nearly a perfect full wave rectified version of an applied alternating signal. The circuit comprises first and second identical non-linear symmetrical rectifiers each having a respective output coupled t... | 11/23/1982 |
| 4356541 | Rectifier A rectifier in which a semiconductor active element, which is a rectifying element, and a diode are connected in parallel in the same direction so that the degradation in rectifying efficiency due to the delay in rise time of voltage when the active eleme... | 10/26/1982 |
| 4347561 | Alternating current to direct current power supply An electronic device that converts alternating current to direct current with high efficiency. This is accomplished by constructing the device in such a manner that the device turns itself on slowly so that a surge resistor is not needed. In common power ... | 08/31/1982 |
| 4336586 | Linear full wave rectifier circuit A circuit and method for producing a signal that is nearly a perfect full wave rectified version of an applied alternating signal. The circuit comprises first and second identical non-linear symmetrical rectifiers each having a respective output coupled t... | 06/22/1982 |
| 4333141 | Full wave rectifier A full wave rectifier includes an operational amplifier having an inverting terminal connected to the emitter of a transistor. A first resistor is connected between a first power source and the collector of the transistor. A second resistor is connected b... | 06/01/1982 |
| 4331994 | Shootthrough fault protection system for a voltage source transistor inverter Faulted transistors in a voltage source transistor inverter are protected against shootthrough fault current, from the filter capacitor of the d-c voltage source which drives the inverter over a d-c bus, by interposing a small choke in series with the fil... | 05/25/1982 |
| 4323962 | High efficiency rectifier with multiple outputs 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... | 04/06/1982 |
| 4319144 | Single polarity circuit A circuit with low impedance for maintaining a single polarity at an output is disclosed. Switching is provided by light controlled switching devices which in one embodiment are field effect transistors (14, 15, 16, 17) which are optically triggered by on... | 03/09/1982 |
| 4314326 | Rectifying circuit with zero correction The invention provides a substantial improvement of a known rectifying circuit for a.c. signals by adding a circuit which measures the d.c. unbalance at the output and subsequently cancels said unbalance by feeding back compensation currents to the rectif... | 02/02/1982 |
| 4307305 | Precision rectifier circuits A precision rectifier circuit includes two differential amplifiers each having a negative feedback path including a diode. Two pnp transistors have their base-emitter paths connected in parallel with the respective diodes and their collectors connected to... | 12/22/1981 |
| 4280175 | Alternating to direct voltage converter The converter comprises a first MOS transistor fed by a current source or by a current-limiting element and it receives through an input capacitor the alternating input voltage. The first transistor is biased by a second MOS transistor the distance drain-... | 07/21/1981 |
| 4276592 | A-C Rectifier circuit for powering monolithic integrated circuits A self-biased MOSFET with suitably biased substrate is used as one of the rectifiers in a rectifier circuit for converting a-c power to d-c power for application to a monolithic integrated circuit of which the rectifier circuit is a part. This avoids the ... | 06/30/1981 |
| 4274018 | Saturation limited bias circuit for complementary transistors A clamp circuit is disclosed which includes a transistor connected between the multiple collectors of a bias current device for complementary output transistors and the output terminal of a driver circuit. The clamp transistor is rendered conductive by si... | 06/16/1981 |
| 4259641 | Linearized detector/rectifier circuit Circuit for use in the rectification and detection of alternating electrical signals. The circuit employs a feedback amplifier in combination with a non-linear rectifier element to provide an output signal which has a linear relationship to the input sign... | 03/31/1981 |
| 4250457 | Full wave rectifier envelope detector A detector is described for fully rectifying a low level A.C. input signal without developing switching transients or substantial levels of undesirable signal components. The output of the detector is substantially equal to the square root of the sum of t... | 02/10/1981 |
| 4202032 | Power control circuit A power control circuit providing a complete range of signals that vary from a full "off" to a full "on" condition comprising an arrangement of electrical components incorporated into a control device that supplies half wave signals at the minimum control... | 05/06/1980 |
| 4187537 | Full-wave rectifier A full-wave rectifier is disclosed for rectifying low level A.C. input signals. In the disclosed embodiment, the rectifier includes first and second differential amplifiers, each constructed of a pair of transistors. One transistor in each pair of transis... | 02/05/1980 |
| 4158882 | Full-wave rectifier circuit A full-wave rectifier circuit useful in a low level envelope type video detector or the like comprises a symmetrical network having a pair of input terminals and an output terminal, the output terminal developing a unidirectional flow of current in respon... | 06/19/1979 |
| 4139880 | CMOS polarity reversal circuit Two P-channel MOS devices and two N-channel MOS devices are interconnected in a manner to provide a polarity reversal circuit. The circuit contains two input terminals and two output terminals. One of the output terminals is designated as a positive termi... | 02/13/1979 |
| 4132907 | Full wave rectifier circuit A single-ended input full wave rectifier circuit is disclosed comprising a complementary common emitter amplifier configuration. An input signal comprising complementary pulses, such as a sine wave, causes conduction alternately in the collector circuits ... | 01/02/1979 |
| 4086624 | Current to voltage converter Disclosed is a circuit for converting a current input of either polarity to a low voltage output of a single polarity. The circuit includes two pairs of pnp-npn transistors which are coupled to that current flow in one direction will turn on one pair whil... | 04/25/1978 |
| 4069460 | Current comparator circuit Two currents that are to be compared are coupled to the two input terminals of a current mirror. The output is taken from a transistor stage which has its input coupled across the current mirror. In a balanced version the current mirror is made symmetrica... | 01/17/1978 |
| 4053796 | Rectifying circuit A rectifying circuit for balanced input currents, of which the two components are applied to a first and a second point of a selective current mirror circuit respectively, either the first point constituting the input and the second point the output, or t... | 10/11/1977 |
| 4030016 | Precision active rectifier circuit An improved feedback/compensation scheme for a precision active rectifier circuit improves the slew rate and loop gain during diode switching and thereby reduces fractional scale linearity problems.... | 06/14/1977 |
| 4027240 | Protected voltage meter An electronic meter circuitry for use in detecting an electrical signal vage in an ordnance firing circuit for providing an unidirectional signal to an indicator which shows the presence of the signal voltage. The circuitry utilizes a first limiter to re... | 05/31/1977 |
| 3958170 | Full wave rectifiers A full wave rectifier comprises positive and negative supply lines, and a differential input amplifier which is powered by the positive and negative supply lines and which has its inverting input terminal connected through an impedance to an input termina... | 05/18/1976 |
| 3940681 | Wide amplitude range detecting circuit A detecting circuit with improved linearity of operation for small signal voltages. A rectifying transistor has switching means connected between its collector and base to be conductive when a signal voltage of one polarity is applied to the input circuit... | 02/24/1976 |
| 3940682 | Rectifier circuits using transistors as rectifying elements Full-wave and half-wave rectifier circuits are disclosed; the former circuit using two transistors and the latter circuit using one transistor. In both circuits transistors are connected in an inverted mode so that, for example, with an NPN transistor cur... | 02/24/1976 |
