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Patent Searching and Data


Matches 951 - 1,000 out of 1,496

Document Document Title
JPH0318640U  
JPH033139U  
JPH037018A
PURPOSE: To discover erroneous connection of power supply wiring quickly by connecting light emitting elements in the colours corresponding to the voltage to be connected by nature to each power supply input terminal. CONSTITUTION: Betwe...  
JPH03855Y2  
JPH02311126A
PURPOSE: To prevent the application of primary power supply to an erroneously inserted circuit panel, and to display the erroneous insertion of said circuit panel by connecting the two pins of a connector on insertion, lowering applied v...  
JPH02311125A
PURPOSE: To inform an operator of the inappropriateness of supply voltage without damaging an electric circuit by outputting voltage driving a switching element when input voltage exceeds a fixed value, interrupting DC power fed to the l...  
JPH02303320A
PURPOSE: To secure safety to leakages by arranging the constitution such that the power supply to an electric apparatus is broken when an earth cable is not connected. CONSTITUTION: When an electric apparatus is connected to commercial p...  
JPH02504365A
PCT No. PCT/DE89/00063 Sec. 371 Date Dec. 8, 1989 Sec. 102(e) Date Dec. 8, 1989 PCT Filed Feb. 2, 1989 PCT Pub. No. WO89/11338 PCT Pub. Date Nov. 30, 1989.A safety circuit arrangement for the high-voltage generator of an electrostatic fi...  
JPH02136439U  
JPH02133154U  
JPH02261015A
PURPOSE: To detect the opposite phase of a three-phase AC power source assuredly in a simple circuit construction by combining a synchronous circuit, a counter circuit, a pulse signal circuit and a resetting circuit. CONSTITUTION: When p...  
JPH0245067B2  
JPH02246731A
PURPOSE: To protect various electric loads by determining the operating voltage of an electric switching means connected between the 1st and 2nd input conductors and a low-rated transformer higher than the maximum allowable voltage of th...  
JPH02118437U  
JPH02214420A
PURPOSE: To prevent erroneous operation of a drive circuit by providing a voltage monitoring circuit for monitoring supply voltage of a source circuit and turning a switching means OFF, when the supply voltage is lower than a predetermin...  
JPH02103739U  
JPH02206328A
PURPOSE: To detect overvoltage with considerable precision by providing a plurality of circuits set at specified values of rated voltage and overvoltage on the primary side of a circuit breaker. CONSTITUTION: On the primary side of a cir...  
JPH0229788Y2  
JPH02197292A
PURPOSE: To realize an erroneous operation preventer without increasing the weight or complicating the structure by providing a switch constituted such that a motor is not started even when a power supply input is connected due to abnorm...  
JPH0232858B2
The additional protection circuit (24) connects between the generator positive output terminal and the negative field winding terminal. The unit (24) comprises a polarity check diode (27), a Zener diode (26) and a fuse (25) in series acr...  
JPH02179223A
PURPOSE: To minimize a loss voltage drop by using a switching passage of an arbitrary channel-type MOS field effect transistor for polarity protecting and coasting conducting means, and connecting it in a forward direction by a conductin...  
JPH0279138U  
JPH0272637U  
JPH02142318A
PURPOSE: To prevent malfunction of a machine due to source voltage drop by providing a means for receiving a voltage detection signal and an operating signal and driving the machine, then setting a threshold voltage higher than the lowes...  
JPH02136032A
PURPOSE: To prevent the unintentional stop of an apparatus in operation by locking output excepting the period of time immediately after the start of operation of said apparatus requiring the function of detecting a negative phase. CONST...  
JPH0218652Y2  
JPH02131326A
PURPOSE: To prevent electric shock when an electric appliance has fallen into the water by splitting a solenoid for driving an automatic power source breaker arranged between a power source and a load into two sections and connecting a w...  
JPH02123918A
PURPOSE: To obtain such a reverse connection preventive circuit that a reverse voltage is not applied to a load by providing an electromagnetic connector between DC power and load, connecting a coil connected to a diode in series to a DC...  
JPH0262789U  
JPH02119077A
PURPOSE: To provide a plural socket terminal which is not dangerous even when a person erroneously touches it by interposing an impedance detecting type electronic circuit having an electronic switching means between the plug socket term...  
JPH0218016B2
Electrical safety device for controlling a printing machine having a control transformer with a plurality of primary and secondary taps for varying voltage levels including respective control lines connected to the secondary taps, a volt...  
JPH02106134A
PURPOSE: To prevent erroneous functions and troubles of a machine by detecting different currents corresponding to the reactances of a capacitor and a coil and discriminating AC frequencies based on the detected currents. CONSTITUTION: I...  
JPH0214292Y2  
JPH029838Y2  
JPH0251322A
PURPOSE: To protect a power source equipment from breakdown, when it is connected erroneously with a different type power source, by tripping a non-fuse circuitbreaker if the current flowing through a smoothing capacitor is larger than a...  
JPH0217936U  
JPH0214240U  
JPH0217823A
PURPOSE: To prevent the burning of a load by inserting an impedance with a proper value between an optional voltage line and an abnormal voltage detection terminal. CONSTITUTION: In case an impedance Z3 is provided between a voltage line...  
JPH023141U  
JPH01321820A
PURPOSE: To enable operation even when a power source is connected reversely by connecting the anodes of first and second diodes to the input terminal and the cathodes thereof (+) terminal while connecting the cathodes of second and four...  
JPH01180831U  
JPH01171540U  
JPH01291634A
PURPOSE: To facilitate detection of trouble such as degradation of the performance of an AC load or disconnection of wire by comparing a signal fed from an AC load current detecting means with a specific level determined based on the mag...  
JPH01166438U  
JPH0154931B2
1. Electric device (7) comprising a switch (5) and a protective circuit which interrupts the power supply for driving the device (7) if the power supply of the switched-on device (7) fails and the switch (5) is switched on at the time th...  
JPH01274619A
PURPOSE: To find abnormality in early stage, by detecting the load current of an electric machinery and obtaining an allowable temperature corresponding to the load condition through an operating circuit, and producing an alarm if the te...  
JPH01268428A
PURPOSE: To enable connection of a power source having unknown polarity by detecting the polarity of a DC power source through a polarity detecting circuit and controlling a switch circuit through a switch control circuit such that the o...  
JPH01150439U  
JPH01150440U  
JPH01260370A
PURPOSE: To prevent erroneous connection of a cable, by a method wherein a mutual short-circuiting is caused between specified lines of a plurality of cables to which first and second circuit boards are connected to form one reciprocatio...  

Matches 951 - 1,000 out of 1,496