| 摘要 |
An electromagnetic pumping device for liquids particularly for feeding liquid fuel in combustion devices, comprises a housing having a pumping chamber with an inlet to the pumping chamber and a discharge from the pumping chamber and with a pumping diaphragm in the chamber having a magnetic armature with a piston rod portion which is actuated by a power circuit having a photoelectric switch therein which is turned on and off by the movement of an aperture in the rod portion of the switch past the photoelectric cell so that the armature and the pumping diaphragm are moved in accordance therewith to pump the liquid.
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