| 摘要 |
Oil flow is regulated by the main float operating the inlet valve to maintain a constant level in the float chamber. Flow from the float chamber is metered by a selected metering orifice in the rotatable disc actuated by the knob. A detent arrangement assures registry of the proper orifice. The small safety float is mounted on the same pivot as the main float and normally moves with the main float but if the inlet valve should leak, causing the oil level in the float chamber to continue to rise to an abnormally high level, the safety float will rise until the ferrous part of the float support bracket comes into the field of the permanent magnet carried by the cover. At this time the float will be lifted with a snap action and the tab standing up from the safety float bracket will strike the arm standing up from the main float bracket. This will deliver a blow to the inlet valve and will maintain the added force on the inlet valve. The control cannot subsequently be placed into operation without first manually depressing the reset button to push the safety float away from the permanent magnet.
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