GB625869A - Improvements in or relating to indicating instruments - Google Patents

Improvements in or relating to indicating instruments

Info

Publication number
GB625869A
GB625869A GB218047A GB218047A GB625869A GB 625869 A GB625869 A GB 625869A GB 218047 A GB218047 A GB 218047A GB 218047 A GB218047 A GB 218047A GB 625869 A GB625869 A GB 625869A
Authority
GB
United Kingdom
Prior art keywords
shaft
arm
torque
spring
rotation
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
GB218047A
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.)
R B PULLIN AND CO Ltd
Original Assignee
R B PULLIN AND CO Ltd
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 R B PULLIN AND CO Ltd filed Critical R B PULLIN AND CO Ltd
Priority to GB218047A priority Critical patent/GB625869A/en
Publication of GB625869A publication Critical patent/GB625869A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/02—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means
    • G01D5/04—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means using levers; using cams; using gearing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manipulator (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

625,869. Indicating-apparatus. PULLIN & CO., Ltd., R. B., and BRAITHWAITE, R. C. Jan. 23, 1947, No. 2180. [Class 106 (iv)] [Also in Group XX] A torque balancing device for controlling the rotation of an indicating instrument movement comprises means for balancing the torque at small angles of rotation and a lost motion device between the movement and means for providing supplementary balancing of the torque at larger angles of rotation. A stub-shaft 1 mounted in a ball-bearing 4 is secured by a flange 2 and screws 3 to one end of a gyroscope assembly. A member 12 is clamped to the stub-shaft 1 and has two arms 14, 14<SP>1</SP>. One end of a tension spring 16 is anchored to a pin 15 on the arm 14, while the other end is anchored to a threaded tension adjusting rod, so that the spring 16 balances the torque of the shaft 1 due to the gyroscope. Another member is clamped to the stub-shaft 1 and has an arm 21 parallel to the arm 14<SP>1</SP>. A sector-plate 22 with arcuate slot 23 pivots on the shaft 1 between the arms 14<SP>1</SP> and 21, which are joined by a pin 24 passing through the slot 23. A second spring 30 is anchored to the sector 22 and to a threaded tension adjusting rod, so that for greater angles of rotation when the pin 24 engages the end of the slot 23, the spring 30 assists the spring 16 in balancing the torque of the gyroscope. The end of the arm 21 is linked to a piston 27 of a dash-pot 28 for damping purposes. Further springs may be introduced at greater angles of deflection. Other lost-motion devices may be employed, e.g. the sector 22 may be provided with spaced pins for co-operation with the arm 21 or a plate rigid on the shaft 1 may have pins to co-operate with a loosely pivoted arm.
GB218047A 1947-01-23 1947-01-23 Improvements in or relating to indicating instruments Expired GB625869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB218047A GB625869A (en) 1947-01-23 1947-01-23 Improvements in or relating to indicating instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB218047A GB625869A (en) 1947-01-23 1947-01-23 Improvements in or relating to indicating instruments

Publications (1)

Publication Number Publication Date
GB625869A true GB625869A (en) 1949-07-05

Family

ID=9734984

Family Applications (1)

Application Number Title Priority Date Filing Date
GB218047A Expired GB625869A (en) 1947-01-23 1947-01-23 Improvements in or relating to indicating instruments

Country Status (1)

Country Link
GB (1) GB625869A (en)

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