GB381726A - Improvements in and relating to frequency indicating apparatus - Google Patents
Improvements in and relating to frequency indicating apparatusInfo
- Publication number
- GB381726A GB381726A GB2885231A GB2885231A GB381726A GB 381726 A GB381726 A GB 381726A GB 2885231 A GB2885231 A GB 2885231A GB 2885231 A GB2885231 A GB 2885231A GB 381726 A GB381726 A GB 381726A
- Authority
- GB
- United Kingdom
- Prior art keywords
- driven
- indicator
- frequency
- norbury
- everett
- 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
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
Abstract
381,726. Frequency measurements. EVERETT, EDGCUMBE, & CO., Ltd., 117, Victoria Street, DREW, A. E., 217, Norbury Crescent, Norbury, and EVERETT, R. E., Colindale Works, Hendon, all in London. Oct. 16, 1931, No. 28852. [Class 37.] Frequency meters incorporating a master clock have the standard time indicator driven by an electric motor, a pendulum or other escapement being employed for regulation only. The two indicators may be driven by separate electric motors. Indicator 1 is driven by a synchronous motor 2 the gearing allowing one revolution in three minutes when the frequency is correct. The standard time indicator 3 is driven by the same motor through a slipping clutch 5, 6, the loose member 5 being in the form of a regular six-sided figure. A flat tapper-plate 8 operated by an impulse electromagnet from a master clock pendulum corrects the position of the indicator 3 at regular intervals. The member 5 may have twelve or other number of faces, and the gearing may be varied proportionally. The member 5 may have V-grooves engaged by a roller substituting the plate 8. Specification 125,953, [Class 139, Watches &c.], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2885231A GB381726A (en) | 1931-10-16 | 1931-10-16 | Improvements in and relating to frequency indicating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2885231A GB381726A (en) | 1931-10-16 | 1931-10-16 | Improvements in and relating to frequency indicating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB381726A true GB381726A (en) | 1932-10-13 |
Family
ID=10282192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2885231A Expired GB381726A (en) | 1931-10-16 | 1931-10-16 | Improvements in and relating to frequency indicating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB381726A (en) |
-
1931
- 1931-10-16 GB GB2885231A patent/GB381726A/en not_active Expired
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