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    • 61. 发明专利
    • INSTANTANEOUS HOT WATER BOILER
    • JPH01193552A
    • 1989-08-03
    • JP1579188
    • 1988-01-28
    • INOUE JAPAX RES
    • INOUE KIYOSHI
    • F24H1/10H05B6/10
    • PURPOSE:To provide an instantaneous hot water boiler having a stable hot water temperature by a method wherein water is directly heated by an induction heating, and a high frequency current is adiabatically controlled or a high frequency temperature is controlled for its changing-over operation by a control pulse of which width is modulated according to a hot water temperature. CONSTITUTION:A high frequency current from a high frequency AC power supply 6 is applied to a high frequency induction coil 5, a metallic pipe 31 is induction heated and the water flowing in the pipe is heated. A high frequency current supplied from the high frequency AC power supply 6 to the induction coil 5 is made into an intermittent pulse form with a relative low frequency through an output circuit 7. A mean energization time for the coil 14 is modified by changing the pulse width and an amount of heating for the hot water through an induction coil 5 is increased or decreased. In case that a temperature detected by a temperature detector 10 is lower than a predetermined temperature, a pulse width from a pulse width modulation circuit 8 is elongated, a mean energization time for the high frequency induction coil 5 is increased and if it is higher than the predetermined temperature, the pulse width is shortened and the mean energization time for the high frequency induction coil 5 is decreased and the induction heating amount through the high frequency induction coil 5 can be rapidly and correctly controlled.
    • 68. 发明专利
    • WIRE CUT ELECTRIC DISCHARGE MACHINE
    • JPH0197525A
    • 1989-04-17
    • JP25182887
    • 1987-10-06
    • INOUE JAPAX RES
    • INOUE KIYOSHI
    • B23H7/04
    • PURPOSE:To prevent the occurrence of one-point concentration discharge, by a method wherein energizers to feed a machining pulse are situated in a manner to make contact with wire electrodes on the upper and the lower side of a workpiece, and pulse sources for machining being independent from each other are situated to the respective energizers. CONSTITUTION:A machining liquid flow in a on-way is formed by a high pressure velocity of flow through a lower nozzle 52 and a low pressure jet through an upper nozzle 51. With this state, a switch 81 is made and broken by means of a gate pulse generating circuit 10 to feed a discharge pulse from a power source 71 through a resistor 91 and from an energizer 61 between an electrode 1 and a workpiece 4. With a pulse generating circuit 11 actuated, a switch 82 is made and broken, and a pulse current is fed from a power source 72 through a resistor 92 and from an energizer 62. As noted above, since a non- synchronous pulse current is fed from the upper and lower energizers, one-point concentration discharge is prevented from occurring, production of gas due to an overcurrent is prohibited, and disconnection of a wire electrode due to heating is prevented from occurring, resulting in the possibility to improve a machining speed.