GB624567A - Improvements in or relating to resistance measuring apparatus - Google Patents
Improvements in or relating to resistance measuring apparatusInfo
- Publication number
- GB624567A GB624567A GB1904246A GB1904246A GB624567A GB 624567 A GB624567 A GB 624567A GB 1904246 A GB1904246 A GB 1904246A GB 1904246 A GB1904246 A GB 1904246A GB 624567 A GB624567 A GB 624567A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- conduit
- scale
- ammeter
- switch
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
624,567. Resistance measurements. SHOTTER, G. F., and NORTHMET POWER CO. June 25, 1946, No. 19042. [Class 37] The Figure shows a device for measuring the resistance of a conduit 1, comprising a casing containing an ammeter 6 in series with a switch 14 and a variable resistance 5, one terminal of which is connected by a short lead 7 to a clip 8 engaging one end of the conduit. A long lead 9 connects the switch to the earthed end 2 of the conduit, through the secondary of a mains energized transformer 11 supplying a predetermined test current to the circuit, the value of which is marked on the scale of the ammeter. In operation the switch is closed and the variable resistance is adjusted until the ammeter indicates the predetermined current. The conduit resistance may be read from the scale of the variable resistance which is calibrated in conjunction with leads 7 and 9 and the transformer 11 to read the conduit resistance directly when the variable resistance is adjusted as above. A lower current value may be marked on the ammeter scale, when a second calibrated resistance scale is provided for use therewith. The instrument may be D.C. fed, and lead 7 may be replaced by a spring prod operating the switch 14 when pressed into contact with the conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1904246A GB624567A (en) | 1946-06-25 | 1946-06-25 | Improvements in or relating to resistance measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1904246A GB624567A (en) | 1946-06-25 | 1946-06-25 | Improvements in or relating to resistance measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB624567A true GB624567A (en) | 1949-06-13 |
Family
ID=10122783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1904246A Expired GB624567A (en) | 1946-06-25 | 1946-06-25 | Improvements in or relating to resistance measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB624567A (en) |
-
1946
- 1946-06-25 GB GB1904246A patent/GB624567A/en not_active Expired
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