GB562182A - Improvements in or relating to zero setting mechanism for indicating instruments - Google Patents

Improvements in or relating to zero setting mechanism for indicating instruments

Info

Publication number
GB562182A
GB562182A GB1596842A GB1596842A GB562182A GB 562182 A GB562182 A GB 562182A GB 1596842 A GB1596842 A GB 1596842A GB 1596842 A GB1596842 A GB 1596842A GB 562182 A GB562182 A GB 562182A
Authority
GB
United Kingdom
Prior art keywords
shaft
arm
lay
scale
adjusting
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
GB1596842A
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.)
Rosemount Measurement Ltd
Original Assignee
KDG Instruments 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 KDG Instruments Ltd filed Critical KDG Instruments Ltd
Priority to GB1596842A priority Critical patent/GB562182A/en
Publication of GB562182A publication Critical patent/GB562182A/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)
  • Measuring Fluid Pressure (AREA)

Abstract

562,182. Indicating; altimeters. K. D. G. INSTRUMENTS, Ltd., and MACK, F. Nov. 11, 1942, No. 15968. [Classes 106 (ii) and 106 (iv)] In an indicating instrument of the kind in which toothed gear trains whose axes of rotation are fixed, drive a pointer over a scale, zero adjusting means are provided for moving an arm moved by the responsive element, bodily around the fixed axis of a transmission member, while maintaining the driving relationship of the arm with the transmission element without imparting responsive movement to the responsive element, but imparting movement to the transmission member relative to the responsive element. As shown, a sensitive altimeter comprises a battery of capsules 20 actuating a layshaft 21 through a link 24. A sector plate 13 secured to the layshaft drives a gear train, which actuates pointers 15, 16, 17 to indicate the altitude in tens of thousands, thousands a.nd hundreds of feet respectively. Barometric pressure at ground level is indicated by a circular scale 26 through a window in the dial 18. The scale 26 is rotatable by an adjusting knob 42 through shaft 3, and pinions 32, 31, 30 and 28. The pinion 32 also drives pinions 37, 38 and 41 to rotate a secondary frame 19, carrying the capsules, about the axis of the lay-shaft to adjust the zero setting. Normally the shaft 3 is held against axial movement by a grub screw 39, but for adjusting the barometric pressure scale without adjusting the zero setting of the altimeter, the grub screw is released and the shaft is slid upwards to release the pinion 37. The lay-shaft 21 is subjected to the influence of a spiral spring 6 secured to the secondary frame 19. In the modification shown in Fig. 3, the capsule 43 is stationary and actuates an arm 45 on a lay-shaft 46 having a further arm 56 actuating a gear sector 47 driving a pointer 50. The lay-shaft is carried by a secondary frame 54 rotatable in a horizontal plane by the knob 42, so that the arm 56 is moved round the pivot in the gear sector 47 for zero adjustment.
GB1596842A 1942-11-11 1942-11-11 Improvements in or relating to zero setting mechanism for indicating instruments Expired GB562182A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1596842A GB562182A (en) 1942-11-11 1942-11-11 Improvements in or relating to zero setting mechanism for indicating instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1596842A GB562182A (en) 1942-11-11 1942-11-11 Improvements in or relating to zero setting mechanism for indicating instruments

Publications (1)

Publication Number Publication Date
GB562182A true GB562182A (en) 1944-06-21

Family

ID=10068824

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1596842A Expired GB562182A (en) 1942-11-11 1942-11-11 Improvements in or relating to zero setting mechanism for indicating instruments

Country Status (1)

Country Link
GB (1) GB562182A (en)

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