US Patent: 1,254,141
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| Gage
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Patentee:
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| Charles A. Humphreys (exact or similar names) - Carrick, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 07, 1912 |
| Granted: |
Jan. 22, 1918 |
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Joel Havens
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Description: |
| This invention relates to gages or indicators, and is particularly concerned with devices, of this character for ascertaining differences in pressures between liquids at different levels or at different points. In gages as heretofore constructed for this purpose, the gage has necessarily been located below the level of liquid, or where the liquid was confined and under pressure it has been located below the elevation to which liquid would rise under the pressure at which it is carried. The object of this invention is to provide means for indicating the pressure in liquids at any desired elevation above the surface thereof where the liquid is unconfined, or if confined, at a point higher than the pressure thereof would raise the liquid. A further object is to provide for the simple means for maintaining the gage at proper condition for operation, or testing the gage. To these ends the invention consists in a riser tube extending from the holding vessel or pipe at a point below the level of the liquid therein tip to the desired height, a gage tube connected with said riser tube and containing a gauging liquid and vacuum producing apparatus for exhausting the air within the riser tube and the gage tube, thereby raising the liquid and filling the riser tube and gage tube, so that the pressure of the liquid can be indicated at any desired point above the level of the liquid to be measured. It also comprises the employment of two vessels or receptacles and two riser tubes leading upwardly therefrom and both connected to the gage containing the gauging liquid, together with means for exhausting the air from the riser tube and gage so that the difference in pressure or elevation of the liquid in the two receptacles can be indicated. |
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