GB409768A - Improvements in and connected with speed indicators and revolution-speed indicators - Google Patents
Improvements in and connected with speed indicators and revolution-speed indicatorsInfo
- Publication number
- GB409768A GB409768A GB3176932A GB3176932A GB409768A GB 409768 A GB409768 A GB 409768A GB 3176932 A GB3176932 A GB 3176932A GB 3176932 A GB3176932 A GB 3176932A GB 409768 A GB409768 A GB 409768A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltmeter
- permanent magnet
- speedometers
- magnets
- stamping
- 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
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/46—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage
- G01P3/465—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage by using dynamo-electro tachometers or electric generator
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
409,768. Electric speedometers. NORTH & SONS, Ltd., Whippendell Road, and ALLEN, A. MASSEY-, 142, Queen's Avenue, both in Watford, Hertfordshire. Nov. 10, 1932, No. 31769. [Class 106 (iii).] In speedometers of the permanent magnet generator type in which the speed is indicated by a voltmeter, the rotatable permanent magnet is associated with an adjustable magnetic short circuit to facilitate adjustment of the effective strength of the magnet. The driving spindle 4 carries on its inner end two spaced bar magnets 6 to which are riveted sector shaped polepieces 11 rotating within fixed poles 23 connected to the stator core 20 with windings 21 connected to a voltmeter. Between the bar magnets 6 is mounted frictionally a two armed iron stamping 15 which may be adjusted into or out of alignment with the magnets to decrease or increase the magnetic strength and thus enable the speeds and the indications on the voltmeter to be brought into agreement. The stamping 15 may be adjusted positively. A distance integrating or revolution connecting device 27 such as that described in Specification 410,764, may be driven through gearing 28.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3176932A GB409768A (en) | 1932-11-10 | 1932-11-10 | Improvements in and connected with speed indicators and revolution-speed indicators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3176932A GB409768A (en) | 1932-11-10 | 1932-11-10 | Improvements in and connected with speed indicators and revolution-speed indicators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB409768A true GB409768A (en) | 1934-05-10 |
Family
ID=10328123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3176932A Expired GB409768A (en) | 1932-11-10 | 1932-11-10 | Improvements in and connected with speed indicators and revolution-speed indicators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB409768A (en) |
-
1932
- 1932-11-10 GB GB3176932A patent/GB409768A/en not_active Expired
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