GB191217388A - Improvements in Electrical Recording Instruments. - Google Patents
Improvements in Electrical Recording Instruments.Info
- Publication number
- GB191217388A GB191217388A GB191217388DA GB191217388A GB 191217388 A GB191217388 A GB 191217388A GB 191217388D A GB191217388D A GB 191217388DA GB 191217388 A GB191217388 A GB 191217388A
- Authority
- GB
- United Kingdom
- Prior art keywords
- record
- pointer
- strip
- discharge
- measuring
- 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
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/04—Arrangements for displaying electric variables or waveforms for producing permanent records
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
17,388. Cooper, W. R. July 26. Electric marking-action. - In electric and other measuring - instruments provided with a pointer moving over a scale, a record is obtained by causing a discharge from an induction coil to pass through the record-strip a between the end g of the pointer and a circular pointed ridge h, Fig. 5. A periodic discharge is obtained by the inclusion in the circuit of a time-operated switch q, and the heat of the spark may be adjusted by the provision of a variable resistance z in the primary of the induction coil v or by a variable spark-gap w in the secondary. The record-strip may be rendered non-inflammable by impregnation with sodium silicate. In a modification, the main part A of the pointer is constructed of non-conducting material and a second discharge point E is formed on the pointer, a corresponding ridge D being carried by a plate C mounted above the record-strip. A mercury commutator may be included in the circuit to obtain simultaneous records. Specifications 7902/90, 21,367/95, [Class 37, Electricity, Measuring &c.], and 2518/00 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB191217388T | 1912-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB191217388A true GB191217388A (en) | 1913-07-17 |
Family
ID=32642323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB191217388D Expired GB191217388A (en) | 1912-07-26 | 1912-07-26 | Improvements in Electrical Recording Instruments. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB191217388A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2719775A (en) * | 1952-12-16 | 1955-10-04 | Bell Telephone Labor Inc | Stylus assembly |
| US2836479A (en) * | 1952-07-16 | 1958-05-27 | Traub Eberhardt | Electrical recording apparatus |
-
1912
- 1912-07-26 GB GB191217388D patent/GB191217388A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2836479A (en) * | 1952-07-16 | 1958-05-27 | Traub Eberhardt | Electrical recording apparatus |
| US2719775A (en) * | 1952-12-16 | 1955-10-04 | Bell Telephone Labor Inc | Stylus assembly |
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