公开(公告)号：US4375613A

公开(公告)日：1983-03-01

申请号：US61127

申请日：1979-07-26

Applicant: Paul Fuller ,  Roderick W. Froud

Inventor： Paul Fuller ,  Roderick W. Froud

IPC: H02P1/42 ,  H02P1/44

CPC classification number: H02P1/42 ,  H02P1/445

Abstract: The present invention concerns electrical control circuits which are particularly applicable to use and controlling the starting of electric motors. The invention thus provides a sensing and switching circuit capable of automatically to bring into and out of operation the start winding of an electric motor at appropriate motor speeds. Appropriate means sense a voltage or current level and a trigger response to the sensed value to supply firing pulses to the gate of a triac. The trigger element is preferably an M.O.S. integrated circuit multivibrator.

Abstract translation: 本发明涉及特别适用于使用和控制电动机启动的电气控制电路。 因此，本发明提供了一种感测和切换电路，其能够以适当的电动机速度自动地使电动机的起动绕组进入和退出运行。 适当的手段感测电压或电流电平以及对感测值的触发响应，以向三端双向可控硅开关元件的栅极提供触发脉冲。 触发元件优选为M.O.S. 集成电路多谐振荡器。

公开(公告)号：US4612104A

公开(公告)日：1986-09-16

申请号：US652079

申请日：1984-09-20

Applicant: John P. Holmes ,  Roderick W. Froud

Inventor： John P. Holmes ,  Roderick W. Froud

IPC: C02F1/00 ,  C02F1/461 ,  C02F1/467 ,  C25B9/06 ,  C25B9/00 ,  C25B15/08

CPC classification number: C02F1/4674 ,  C02F1/46104 ,  C25B9/06 ,  C02F2001/46119 ,  C02F2001/46138 ,  C02F2001/46152 ,  C02F2201/4611 ,  C02F2301/022

Abstract: An electrochemical cell has an annular flow passage for electrolyte solution. The cell is designed such that, in an intermediate zone, the passage is of constant cross-section (to achieve high electrolytic activity) and, in end zones, the passage progressively increases in cross-section to a maximum value (to lower the current density in regions in which unwanted deposition of salts may preferentially occur). The cross-sectional shape of the passage along its length also assists in reducing turbulence in the flow thereby reducing the rate of deposition of salts. Owing to the low rate of deposition, it is possible to maintain the electrodes relatively clean by current reversal at relatively infrequent intervals. That enables the cell to be used for longer periods between cleaning operations.

Abstract translation: 电化学电池具有用于电解质溶液的环形流动通道。 电池被设计成使得在中间区域中，通道具有恒定的横截面（以获得高的电解活性），并且在端部区域中，通道的横截面逐渐增加到最大值（以降低电流 密度可能优先发生盐的不希望的沉积的区域）。 沿其长度的通道的横截面形状还有助于减少流中的湍流，从而降低盐的沉积速率。 由于沉积速率低，可以以相对不频繁的间隔通过电流反转来保持电极相对清洁。 这使得电池在清洁操作之间能够使用更长的时间。