GB490901A - Electrical measuring instruments - Google Patents

Electrical measuring instruments

Info

Publication number
GB490901A
GB490901A GB1781/38A GB178138A GB490901A GB 490901 A GB490901 A GB 490901A GB 1781/38 A GB1781/38 A GB 1781/38A GB 178138 A GB178138 A GB 178138A GB 490901 A GB490901 A GB 490901A
Authority
GB
United Kingdom
Prior art keywords
coil
frame
plate
resistor
terminals
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
GB1781/38A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
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 Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of GB490901A publication Critical patent/GB490901A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adjustable Resistors (AREA)

Abstract

490,901. Current and volt meters. GENERAL MOTORS CORPORATION. Jan. 19, 1938, No. 1781. Convention date, Sept. 20, 1937. [Class 37] A differential instrument comprises two field coils 42, 50 adjustably arranged in fan shape upon a frame 16, a pointer 76 pivoted at the intersection of the coil axes, and a resistor 54 mounted on an insulating strip 52 secured to the coil adjusting brackets 36, 46, the resistor being connected in series with one of the field coils. The terminals 6, 8 are insulated from the back-plate 22, terminal 6 being connected to one end of each coil through strip 29, rivet 18 and the frame 16. The other end of coil 50 is connected to resistor 54, finger 60, and is then earthed through the back-plate 22, the remaining connection from coil 40 being to terminal 8 by way of parts 62, 64. An insulating strip 26 on the back-plate is formed into a loop between the terminals 6, 8. The adjusting bracket 36 is of soft-iron and is connected to the frame 16 by a nut 38 and wide slot 40, a similar adjustment being possible with bracket 46 which is constructed of brass. The dial plate 67 is secured by posts 69 connected to lugs 66 on the frame 16, a further lug 68 providing the pivot bearing for the pointer movement.
GB1781/38A 1937-09-20 1938-01-19 Electrical measuring instruments Expired GB490901A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US490901XA 1937-09-20 1937-09-20

Publications (1)

Publication Number Publication Date
GB490901A true GB490901A (en) 1938-08-23

Family

ID=21957996

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1781/38A Expired GB490901A (en) 1937-09-20 1938-01-19 Electrical measuring instruments

Country Status (1)

Country Link
GB (1) GB490901A (en)

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