Abstract: A security device or apparatus for use with an ATM includes a pair of base assemblies selectively connected by a beam assembly. The beam assembly is designed to prevent access to one or more service doors of the ATM. In one version of the device the beam assembly includes a horizontally extending beam with vertically oriented posts extending from the beam. The device allows for the beam of the beam assembly to be moved from a locked position or state to an unlocked position or state. In the locked position access to the one or more service doors of the ATM is restricted or prevented, while in the unlocked position access to the one or more service doors of the ATM is permitted.

Abstract: According to one embodiment, a solid state relay with ultra low emissions is disclosed. The solid state relay includes one or more inputs for receiving a control signal, an input circuit for processing the received control signal. An output circuit responsive to the control signal to close the solid state relay so that power may be delivered from a power source to an electrical load. The input circuit can include zero-crossing functionality configured such that the solid state relay does not turn on until an AC source signal crosses from a negative value to a positive value or from a positive value to a negative value. The zero crossing functionality may comprise opto-couplers with zero crossing functionality. The input circuit may further comprise a low emission driver portion that is to reduce emissions during the portion after the initial start up.

Abstract: A device and a method are provided for controlling a magnetic valve which has a coil and an armature which is displaceable by magnetic force, by means of which armature a closure element is displaceable for the purposes of injecting fuel into a combustion chamber, the method includes the steps of: energizing the coil with a voltage in accordance with a first voltage profile in order to generate a first electrical current through the coil; determining a first profile as a function of a first magnetic flux and the first current; identifying, in the first profile, a first characteristic of at least one first start of displacement at which the armature begins to displace the closure element, generating a second voltage profile and energizing the coil in accordance with the second voltage profile, such that, in a second profile, as a function of a second magnetic flux and a second current, a second characteristic of a second start of displacement is more similar to a reference characteristic than the first charact

Abstract: An electromagnetic relay for starting a motor of a starter includes a resistor to reduce an activation current that flows through the motor from a battery for activation of the motor, a relay contact that causes the starting current to flow while bypassing the resistor, a relay coil that forms an electromagnet when excited by energization, and a control circuit that controls an excited state of the relay coil for activation of the motor to open or close the relay contact, thus controlling energization of the motor from the battery via the resistor. The electromagnetic relay incorporates therein the control circuit.

Abstract: A circuit for driving an actuator including a closing coil and an opening coil, the circuit including a first electrical switch, a second electrical switch, a third electrical switch, a first diode, a second diode, a third diode, and a capacitor electrically connected to a second terminal of the third electrical switch. The circuit is structured such that controlling the state of the first, second, and third transistors causes current flowing through the circuit to flow through one of the closing coil and the opening coil and to not flow through the other of the closing coil and the opening coil.

Abstract: A normal relay emulator is described. The normal relay emulator may include a trigger circuit configured to detect a condition on a first power rail, the first power rail having a first voltage supply level. A boost converter electrically coupled to the first power rail and configured to boost the first voltage supply level to a second, higher, voltage supply level is provided. A bi-stable relay having a first terminal and a second terminal and an actuator electrically coupled to the boost converter and communicatively coupled to the trigger circuit is also provided. The actuator may be configured to energize the bi-stable relay using the second voltage supply level such that electrical contact between the first terminal and the second terminal changes between a first state and a second state based on the trigger circuit detecting the condition.

Abstract: The devices and methods described below provide for a high voltage control circuits using commercial lower voltage, and lower cost, relays. A low voltage control system using commercial switching relays is used to control and switch an isolated low voltage power supply through an isolation layer. The isolated low voltage power supply is used to drive commercial switching relays that control the high voltage power applied to the high voltage load. Adding the isolated low voltage power supply controlled through an isolation layer enables the use of commercial low voltage components to switch high voltage power such as 347VAC without violating Underwriters Laboratories spacing or testing requirements.

Abstract: The disclosure relates to a process of configuring a standalone self-supplied numeric controlled relay for providing phase and earth over current protection to electrical systems by accurate current measurement. The arrangement for current measurement with control algorithms is provided for power control by providing amplified and conditioned current for optimization between the current to power an electronic circuit and the fidelity of a measured current waveform so that they both are at the acceptable levels at the same time. This disclosure describes the current sensing and associated algorithm for power control in a truly self-powered relay.

Abstract: A relay driving module is adapted for driving a latching relay, and includes a current limiting circuit, an energy storage component, and a switch circuit. The current limiting circuit is adapted for receiving a power signal, and draws an amount of current that does not exceed a current threshold from the power signal. The energy storage component is coupled electrically to the current limiting circuit for receiving the current from the current limiting circuit so as to store energy therein. The switch circuit is coupled electrically to the energy storage component, and is controlled by a control signal to selectively enable the energy storage component to discharge the energy stored therein so as to drive the latching relay.

Abstract: A plurality of valves are triggered so that a first valve is triggered by a first trigger signal and a second valve is triggered by a second trigger signal, the first trigger signal and the second trigger signal are each generated by generating a pulse width modulated frequency signal of the first frequency f1 and a dither signal of the second frequency f2, where f1>f2, the trigger signal is generated by modulating the clock pulse duty factor of the frequency signal with the dither signal, and the dither signals of the first trigger signal and of the second trigger signal are synchronized with one another at chronological intervals.

Abstract: A protective circuit (30) for intrinsically safe electromagnetic actuators operating at the voltage of a power supply approved for underground mining, for switching electrohydraulic valves in underground mining, comprising a coil (11) connected to a first potential (2) and a second potential (3) of the power supply and associated with at least two spaced apart short-circuit means (12) connected in parallel with the electromagnetic actuator coil (11) for short-circuiting ting the coil in the event of a reversal of the potential of the coil voltage. In accordance with the present invention the protective circuit comprises a semiconductor switch (T3) which is inserted between the coil (11) and the second potential (3) and, in the event of a voltage reduction or potential reversal, isolates the coil (11) from the second potential, so that the discharge from the coil (11) has no adverse effect on the energy supply system or the intrinsic safety.

Abstract: The invention relates to a technique for discerning a status of an armature of a high-speed solenoid at any time during its operational cycle. In high speed solenoids, motion of an armature does not occur until after a finite and indeterminate lapse of time after application of a driving voltage. In the present invention, a pulsed driving voltage is used to drive the solenoid. A resultant current in a coil of the solenoid exhibits discontinuities in its rate of change when the armature moves. Occurrences of the discontinuities are used to produce control signals and coordinate operation of the solenoids and other controllable events. Occurrence of these discontinuities exactly correlates with armature motion. Consequently, time lapse between application of voltage and motion of the armature becomes inconsequential in design of a control system. In other words, control and coordination of operation of high-speed solenoids can be performed without consideration of uncertainties of the time lapse.

Abstract: Providing a circuit for preventing simultaneous ON operations at a relay drive apparatus, which can prevent the simultaneous ON operations securely, the circuit includes a first diode, a second diode, a first transistor connected through the first diode with a first drive unit for controlling ON/OFF operation, a second transistor connected through the second diode with the second drive unit for controlling ON/OFF operation, a first junction point of the first resistor and the first drive unit, a second junction point of the second resistor and the second drive unit, a third junction point of the first diode and the first transistor, a fourth junction point of the second diode and the second transistor, a third diode connected with the second junction point and the third junction point, and a fourth diode connected with the first junction point and the fourth junction point.

Abstract: A method for driving a plurality of actuators having an output stage having multiple channels, by way of whose channels boost currents are conveyed to the actuators. In this method, a check is made as to whether rising edges of multiple boost currents are present simultaneously (rising edge collision). Upon the identification of simultaneously present rising edges, at least one of the boost currents is conveyed in time-offset fashion to the associated actuator.

Abstract: In an operation circuit of an electromagnetic switching device, when electric energy is discharged by discharge switches connected in series, respectively, to opening coils and closing coils, an induction current flowing in a direction opposite to a current of the coil of the excitation side is generated. The current flows through the coil on the non-excitation side due to magnetic coupling, and a magnetic flux necessary for driving is cancelled, thereby inhibiting generation of a driving force. The operation circuit includes first and second opening and closing coils, so that a moving element may be driven between those coils. This circuit includes a circuit for suppressing an over-voltage at the moment of interrupting an excitation current of a first coil and for interrupting an induction current generated through the first coil at the time of exciting the second coil.

Abstract: An electrical circuit arrangement for controlling a unit, such as an adjustment system for windows or a sliding sunroof, that is driven by a motor and is situated in a motor vehicle. The arrangement guarantees that, in the case of a short-circuit of circuit components, especially a control device operation of a motor is still possible, especially in a preferred direction of motor rotation, whereby the direction of rotation results in an opening of the unit and the short-circuit is caused by salt water for instance. Two circuit-breaker elements that operate the motor in either direction can be directly activated by an allocated circuit device which bypasses a failed control device. The remaining circuit-breaker element is blocked at least when the first circuit-breaker element is activated.

Abstract: A relay multiplexing system which provides improved safety from hazardous voltage conditions. The relay multiplexing system comprises a relay multiplexer module and a terminal block which connects to the relay multiplexer module. The relay multiplexer module and corresponding terminal block incorporate a design according to the present invention whereby power can only be provided to the respective relays when the corresponding terminal block is connected to the respective relay multiplexer module. The terminal block is required to form an electrical path between the power supply in the relay multiplexer module and the relays. Thus, when the terminal block is removed from the corresponding relay multiplexer module, power is unable to be provided to the relays, thereby ensuring safety from hazardous voltages which could otherwise appear on exposed pins of the connector.

Abstract: In a power window device, a DOWN switch has first and second switches in a power window circuit located in a door for a window of a passenger's seat. A normally-closed contact of the first switch and a remote UP terminal of the power window circuit to which an UP signal is applied from a power window circuit provided near the driver's seat are connected. A normally-closed contact of the second switch and a remote DOWN terminal of the power window circuit to which a DOWN signal is applied from the power window circuit are connected. When the DOWN switch is manually operated, a signal supply line to which the UP signal and the DOWN signal are applied and a power supply line to which a power source is connected are electrically disconnected. As a result, the power window device is operable even when the signal supply line is grounded due to submerging in water.

Abstract: A disclosed battery supply control unit comprises a large current relay in which an excitation current continuously flows when it is in its connecting state and a small current relay in which a limited excitation current flows only at the time of changeover between its connecting state and non-connecting state. If loads require a large current, the large current relay and small current relay are maintained in the connecting state, and if the loads do not require the large current, the large current relay is maintained in the non-connecting state while the small current relay is maintained in the connecting state at least in a predetermined time.

Abstract: A dual solenoid-based linear motion actuator has a single input for supplying both electrical power and positioning signals for a pair of solenoid coils. A binary control signal alternates between first and second voltage levels, one of which is used for powering the dual solenoid actuator and its control electronics, and also for controllably displacing a movable element to a first of a pair of spaced apart positions terminated by electrically conductive stops. The moveable element is electrically coupled to the second voltage level so that contact with either of the stops will apply the second electrical voltage level to control logic circuitry. The actuator's input terminal is coupled to an electrical energy storage circuit, such as a battery and/or capacitor in parallel with the battery, that serves as the power supply for the actuator, extracting and storing power necessary for operating the control circuitry and energizing the solenoid coils.

Abstract: A method of controlling velocity of an armature of an electromagnetic actuator as the armature moves from a first position towards a second position is provided. The electromagnetic actuator includes a coil and a core at the second position. The coil generates a magnetic force to cause the armature to move towards and land at the second position. A control method is provided to ensure a near zero velocity landing of the armature in the second position while compensating for non-ideal external influences on the system.

Abstract: An actuating device for a motor used in a power window of an automobile which can drive the motor reliably to open the window even when the automobile is submerged in water. This device has a simple configuration is relatively small and inexpensive. This activating device comprises a drive circuit for a motor which has first and second relays to allow electric current to flow so as to drive the motor in either the forward or reverse direction. The contact of the second relay, which drives the motor in one direction, is used in such a way that the contact forms a part of an electronic circuit for the magnetic coil of the first relay. When the second relay operates, the electric circuit for the magnetic coil of the first relay is closed off. This activating device can ensure that a power window will be opened even if the automobile is submerged, and the first and second relay are switched ON at the same time.

Abstract: A method is provided to control velocity of an armature of a fuel injector as the armature moves from a first position towards a second position. The fuel injector includes a stator core at the second position and a coil is associated with the stator core. The coil, the stator core and the armature define a magnetic circuit. The coil generates a magnetic force to cause the armature to move towards and impact the stator core. The method includes energizing the coil to permit the armature to move towards the stator core. A rate of change of magnetic flux of the magnetic circuit is determined. Closed loop feedback control of the determined rate of change of magnetic flux is used to regulate a rate of magnetic flux by controlling current to the coil so as to control a velocity of the armature upon impact with the stator core.

Abstract: An irrigation system valve controller which provides for alternating operation of two conductive output paths from a single energizing input source. The valve controller allows adding new valves to an existing automatic sprinkler system without having to route additional wire between the new valves and the existing system controller, and provides independent control of each valve using a single pair of input power leads from the existing controller.

Abstract: A hybrid relay with an electromagnetic relay system having at least one coil one core yoke unit, at least one armature which switches contacts and one power semiconductor whose switching path, in combination with the contacts switches the load circuit of the relay wherein the contacts are switched on no-load by offsetting the control of the power semiconductor in time resulting in good heat dissipation and a compact design with few individual parts.

Abstract: A system and method for controlling relays. The method may comprise receiving one or more input commands for a plurality of relays, with the plurality of relays including a first relay, and a last relay, initiating actuation of the first relay after receiving the input relay commands, and initiating actuation of the last relay after initiating actuation of the first relay. Initiating actuation of the last relay does not wait for a debounce of the first relay. The method waits a debounce period after initiating actuation of the last relay. The debounce period operates to debounce the last relay and the first relay. One or more second relays may also be included in the debounce sequence. The relays may be latching or non-latching relays. The method may determine if another relay is required to be actuated after initiating actuation of each relay. One of the input commands may include a debounce mode input. A delayed debounce mode debounces the plurality of relays only after the last relay has been actuated.

Abstract: An electromagnetic valve has a first and a second electromagnetic coil and an armature. The first electromagnetic coil generates a magnetic filed to cause the armature to move a valve for closing. The second electromagnetic coil generates a magnetic filed to cause the armature to move the valve for opening. The first electromagnetic coil is energized to generate the magnetic field. Measurement of time at a first moment is started before the valve is moved to a first position at which the first electromagnetic coil is temporarily de-energized and to output a first signal after a predetermined period of time has passed from the first moment. The temporarily de-energized first electromagnetic coil is energized in response to the first signal. The first electromagnetic coil is de-energized when the valve is fully closed. The second electromagnetic coil is energized to generate the magnetic field after the first electromagnetic coil is de-energized.

Abstract: A method of controlling velocity of an armature of an electromagnetic actuator as the armature moves from a first position towards a second position is provided. The electromagnetic actuator includes a coil and a core at the second position. The coil generates a magnetic force to cause the armature to move towards and land at the core. Spring structure acts on the armature to bias the armature away from the second position to a resetting position. The method includes selectively energizing the coil to permit the armature to move at a certain velocity towards the core. A certain voltage corresponding to a voltage across the coil is determined when the armature is approaching the core. The certain voltage corresponds to a rate of change of magnetic flux and is used as a feedback variable to control energy to the coil so as to control a velocity of the armature as the armature moves towards the core. In one embodiment, the certain voltage is a measured terminal voltage of the coil.

Abstract: A voltage adaptor outputs 208-220 volts at an outlet and receives two 110 volt inputs. The adaptor has first and second male input connectors that can mate with respective power connectors and a control circuit interconnecting the male connectors to the outlet of the adaptor. The control circuit prevents energizing the outlet unless both male connectors are mated with respective energized power connectors and the phases of the voltages carried by the power connectors are different from each other. Furthermore, the control circuit prevents the energization of one of the male connectors, when it is not mated with a power connector, from the other male connector when the other connector happens to be mated with an energized power connector, thereby preventing a shock hazard that could otherwise arise when one of the male connectors is plugged in but the other male connector remains exposed to the touch.

Abstract: An alternator circuit for alternately operating one of first and second electrical load devices which uses a magnetic latch relay to perform the alternation. The circuit includes a first circuit means for supplying electrical energy from a source to one of said first and second electrical load devices, and magnetic latch relay alternating means having first and second states. The alternating means in a first state interconnects the first electrical load device to the first circuit means, and in the second state interconnects the second electrical load device to the first circuit means. One application of the inventive circuit is for use in controlling the level of liquid in a container within a predetermined range using 2 pumps.

Abstract: An arrangement for driving actuator coils for two or more driven devices employs a microprocessor or similar controller and an actuator driver circuit. The actuator driver circuit controls two or more relay actuator coils from a single microprocessor output terminal. This output terminal can provide a high, low, or pulse output signal. An amplifier switching device, such as a transistor, whose base is coupled to the output terminal of the microprocessor, drives the first relay actuator coil as its load. A rectifying diode is connected to one end of a capacitor and thence through a negative resistance device to a second relay actuator coil or other driven device. The coil impedances are selected so that the second coil has a significantly higher impedance than the first coil. When output pulses appear at the microprocessor output terminal, the transistor switch pulses on and off, and thus energizes the first coil.

Abstract: A machine includes first and second electrically actuated components and a shutdown circuit electrically interconnected therewith. The shutdown circuit has a current sense relay element which is electrically connected to the first electrically actuated machine component. The current sense relay element includes a coil capable of generating a magnetic field in response to direct current flowing therethrough and a reed switch adjacent the coil which is movable between open and closed positions in response to the presence of the magnetic field. The reed switch is normally closed when the direct current flowing to the first electrically actuated machine component is at or above a predetermined level. The reed switch opens when the direct current flowing to the first electrically actuated machine component falls below the predetermined level.

Abstract: This invention provides a method and apparatus for agitating magnetic particles, suspended in a solvent using an alternating magnetic field gradient. The apparatus has a housing chamber capable of holding one or more vials containing suspended paramagnetic particles, one or more magnetic field generating devices surrounding the housing chamber and a controller device for controlling the length of time and position of the magnetic field generated.

Abstract: A low voltage power inverter utilizes reed switches to control a number of display tubes. The reed switches are controlled by magnetic coils or permanent magnets. The magnetic coils receive a control signal from a control circuit. The control circuit is powered by a capacitor coupled around a power lead and a capacitor coupled around a return lead. The permanent magnet is coupled to a mechanical actuator.

Abstract: This invention relates to driving solenoid and motor loads while providing the means for fast turn on and fast turn off. Many applications including automotive fuel injector drivers, Anti-Skid Braking (ABS) solenoid and motor drivers, and other electro-mechanical motion control require the ability to quickly turn on or off a number of devices. The invention utilizes a bridge architecture to drive the loads and to turn on and off individual devices. The invention employs a diode and a switch for each device controlled plus a single master diode and a single master switch. The invention thereby reduces the number of components needed to control N devices to 2*N+2 from prior art half bridge circuit 4*N. Novel techniques and algorithms are used to multiplex the single master switch and control multiple inductive devices. The system provides redundant control and error checking means to preclude single point failure mechanisms.

Abstract: A protected reversing contactor is disclosed comprising two electromagnets intended to be alternately energized and whose armatures actuate two sets of respective phase switches and two acknowledgement switches mounted respectively in series in the supply circuit of the two coils of the two electromagnets. These two acknowledgement switches are actuated by a transmission system comprising two coaxial rotary shafts disposed end to end and each having an arm adapted to be driven in rotation, in one direction, by one of the electromagnets and a finger cooperating with the acknowledgement switch of the other electromagnet.

Abstract: An electric tool for driving in fixing elements (10) into an object (4) by means of a magnetic field generated by supplying magnetizing current to an electromagnetic device, comprises a circuit means (17) which is adapted, when activated, to supply magnetizing current to said electromagnetic device. The tool comprises two actuators (18, 19) alternatively connectible to the circuit means (17) and adapted, when actuated, to activate the circuit means, one (18) of the actuators being an actuator which is activatable in a potential-free mode and which is, in an initial position, unconnected to the circuit means, and the other (19) of the actuators being connected to the circuit means in the initial position.

Abstract: A driver circuit for first and second coils includes first and second selector switches coupled in series between first terminals of the coils and a first common junction, first and second diodes coupled in series between second terminals of the first and second coils, respectively, and a second common junction and a source of first potential coupled to the first common junction. A modulation switch is coupled between the second common junction and a source of second potential. The selector switches and modulation switches are operated to cause currents of controlled magnitude to flow through the coils. The circuit has improved fault immunity whereby at least one coil can be energized even when another coil has been subjected to a chassis ground fault.

Abstract: Fail-safe brake valve driver (10) is provided for controlling a dual coil (A,B) brake valve. A pair of identical circuits (12, 14) are each uniquely associated with one of the brake valve coils. By means of control of an operational amplifier (16) and dual-stage current driver (18), the circuits (12, 14) each provide one-half of the current necessary for achieving brake valve control under normal operations. In the event that one of the coils (A, B) or circuits (12,14) fails, relays (56, 156) are provided for removing the failed circuit or coil from operation and allowing the remaining coil and circuit to carry the full operational load.

Abstract: A relay combination includes a first relay having a first double throw contact set including a first normally closed contact, a first normally open contact and a first armature for contacting the first normally open and closed contacts. A first armature coil manipulates the first armature. A second relay includes a second double throw contact set including a second normally closed contact, a second normally open contact and a second armature for contacting the second normally open and closed contacts. A conductor conducts an alternating current signal to the first and second normally closed contacts. The first and second armatures are electrically coupled to one another through a conductor electrically isolated from the first and second normally closed contacts. A latching circuit is included comprising first and second input circuits for latching the first relay upon receiving a signal on the first input circuit and latching the second relay upon receiving a signal on the input circuit.

Abstract: The system is particularly suitable for controlling a solenoid valve SV1 having two stable operating positions in accordance with programmed `on` and `off` periods set at a 24 hour timer 10. The valve typically in one position connects a gas supply to a regulator ensuring the latter then supplies gas at a higher pressure; and in the other position connects the regulator to atmosphere through a vent stack so that the regulator then supplies gas at a lower pressure. The system is powered by 3 volt batteries B1, B2 and has extremely lower current consumption giving a battery life of 5-6 years. The solenoid 18 is energised briefly by voltage pulses fed from a capacitor C5 via a reversing switch 16. Automatic battery voltage checking is incorporated.

Abstract: An electric control device adaptable to a two state switching device is provided comprising two electromagnets disposed head to tail and each having a coil inside which a coil is slidably mounted, and two rocking levers which each comprise a first arm having a toothed sector and a second arm coupled to a respective core. The two toothed sectors mesh with a toothed pinion mounted for rotation in the case. This toothed pinion may be coupled to the operating shaft of a switching device.

Abstract: A method and apparatus for driving an electromagnetic device includes two coils which selectively attract and repel a moving body. In order to allow a quick switching of the moving body between being attracted by one coil and the other, the current through the coil which is not holding the moving body in its magnetic field can be made to be a level higher than the current to the coil which is holding the body in its magnetic field. By reducing the current to the coil that is holding the body, the body can be rapidly switched to be within the magnetic field of the other coil. In addition, the currents to the respective coils can be increased before this switching occurs. Structure can also be provided across the coils to quicken the time it takes for the magnetic field to dissipate.

Abstract: Alternator circuit arrangement (20) for controlling the electrical energization of multiple load devices such as two pump motors (41,42) on an alternating basis so as to maintain the level of a liquid (86) in a container (84) within a predetermined range. The alternator circuit arrangement (20) further including an RC circuit (54) having a capacitor (62) for discharging through a normally closed switch (50b) which is opened during energization of the pump motors (41,42) so as to energize a bi-stable relay (52) which in turn interconnects alternate ones of the pump motors (41,42) to the alternator circuit (20) such that upon detection of the liquid (86) at an intermediate level (96) alternate ones of the pumps (41,42) are energized.

Abstract: An alarm actuated emergency light signalling circuit to replace the usual wall mounted light switch. The new switch circuit fits within the electrical wall box and has the external appearance and manual operation of an ordinary light switch. When triggered by an alarm system, the new light signalling circuit overrides the circuit breaking function of the light switch and causes the lighting controlled by the switch to flash intermittently. The flashing of the lighting occurs regardless of the initial state of the light switch, whether on or off. The circuit includes a low voltage portion driven by the alarm and including sensing and timing circuitry. The low voltage circuit does not require or use any electric power when not actuated by the alarm. The alternating current power circuit for the lighting is operable in the conventional on/off fashion unless actuated by the alarm and low voltage circuit. Thus, there is no additional alarm position for the switch.

Abstract: The method and apparatus are used for operating a magnetic clutch system of the type which includes a magnetic clutch having a clutch magnetizing coil which can be actuated to couple a first rotatable element to a second rotatable element when voltage is applied across the clutch magnetizing coil and which disengages the second rotatable member when voltage is disconnected from, or connected in reverse polarity across, the clutch magnetizing coil and which can include a brake with a brake magnetizing coil.

Abstract: A line printer having a suitable number of hammers which are controlled by electromagnets and which are juxtaposed with equal pitch on a carriage to effect printing while simultaneously shifting the hammers, wherein adjacent hammers are not simultaneously driven to thereby prevent malfunctions due to the influence of adjacent electromagnets.

Abstract: A rejection system for use with an inspection system, which inspects a number of products transferred at high speed on a conveyor at a predetermined inspection position and generates a product reject signal as well as a product inspection position arrival signal is disclosed, in which there are provided a plurality of product rejection mechanisms for rejecting unnecessary products from the conveyor at different position and a driving circuit for driving the plurality of product rejection mechanism. In this case, the driving circuit receives the product reject signal and product inspection position arrival signal from the inspection system and then produces driving signals to drive the plurality of product rejection mechanisms in time sharing manner whereby the plurality of product rejection mechanisms reject the unnecessary products from the conveyor at different positions.

Abstract: A central locking system particularly suitable for use in a motor vehicle to lock or open, at one time, all the vehicle doors from any one of a number of locations, includes at least one lock bolt mechanism which provides movement in a selected one of a locking and a release direction to locking elements at the vehicle doors. At least one control switch which may be located at the door on the driver's side of the vehicle is selectively actuable to one of first and second switch positions, and is arranged together with a pulse drive circuit including a capacitor to provide a first drive pulse to the lock bolt mechanism when the control switch is in the first switch position. The first drive pulse causes the lock bolt mechanism to move the locking elements at the vehicle doors in one of the locking and release directions, and is produced by the capacitor in response to a charging current supplied to the capacitor by a charging current circuit.

Abstract: A latch-relay drive circuit includes a pair of switching devices for separately energizing the set and reset latch-relay coils. To prevent the latch-relay from remaining set once the power fails, an energy storage device, such as a capacitor charged from the power supply, is automatically switched across the reset coil by a switching circuit once the power supply voltage drops below a predetermined voltage thereby automatically resetting the relay.