GB219716A - Improvements in or relating to manometers - Google Patents

Improvements in or relating to manometers

Info

Publication number
GB219716A
GB219716A GB353523A GB353523A GB219716A GB 219716 A GB219716 A GB 219716A GB 353523 A GB353523 A GB 353523A GB 353523 A GB353523 A GB 353523A GB 219716 A GB219716 A GB 219716A
Authority
GB
United Kingdom
Prior art keywords
former
mercury
resistance
indicator
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB353523A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB353523A priority Critical patent/GB219716A/en
Publication of GB219716A publication Critical patent/GB219716A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

219,716. Martin, H. Feb. 6, 1923. Tell-tale apparatus.-Relates to manometers of the electrical resistance type suitable for use as petrol level indicators for the tanks of motor vehicles. One leg of the U-tube containing mercury or other conducting liquid is formed by a chamber a<1> and the other leg by the cylindrical part a of the cover plate g. The naked resistance wire b, the resistance of which depends on the extent of immersion in the mercury, is wound in a helical groove on an insulating former l. Deep flutes are cut in the former, and if of ebonite it is polished to prevent filming by the mercury. The former may be made of glass or porcelain. The coil b above the mercury may be covered with oil to prevent filming and corrosion, and an enlarged space a<2> is provided to receive the.oil when the mercury rises. The cover h carrying the former l is insulated, and supporting lugs h<1> are provided for the device. A pipe d connects the chamber a<1> with the tank. The resistance b is connected to a coil indicator e and a battery f which may be the battery of the motor vehicle. A fixed external resistance k is provided in circuit. It may be. wound on a former surrounding the casing a<1> as shown in Fig. 1, or may be arranged on the insulated cover h. A pushbutton switch may be arranged in the circuit so that the indicator is normally, inoperative. The resistances of the coils of the indicator may be adjusted so as to limit the movement which may then be magnified by gearing. A small carbon rod may be substituted for the resistance wire b. Specification 164,828 is referred to.
GB353523A 1923-02-06 1923-02-06 Improvements in or relating to manometers Expired GB219716A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB353523A GB219716A (en) 1923-02-06 1923-02-06 Improvements in or relating to manometers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB353523A GB219716A (en) 1923-02-06 1923-02-06 Improvements in or relating to manometers

Publications (1)

Publication Number Publication Date
GB219716A true GB219716A (en) 1924-08-06

Family

ID=9760149

Family Applications (1)

Application Number Title Priority Date Filing Date
GB353523A Expired GB219716A (en) 1923-02-06 1923-02-06 Improvements in or relating to manometers

Country Status (1)

Country Link
GB (1) GB219716A (en)

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