GB852541A - Improvements in and relating to thickness measuring gauges - Google Patents
Improvements in and relating to thickness measuring gaugesInfo
- Publication number
- GB852541A GB852541A GB2820657A GB2820657A GB852541A GB 852541 A GB852541 A GB 852541A GB 2820657 A GB2820657 A GB 2820657A GB 2820657 A GB2820657 A GB 2820657A GB 852541 A GB852541 A GB 852541A
- Authority
- GB
- United Kingdom
- Prior art keywords
- assembly
- coating
- earpiece
- circuit
- oscillations
- 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
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
- G01B7/105—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance for measuring thickness of coating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Primary Cells (AREA)
Abstract
852,541. Electric tests. IMPERIAL CHEMICAL INDUSTRIES Ltd. June 18, 1958 [Sept. 6, 1957], No. 28206/57. Class 37 In apparatus for gauging the thickness of a material such as a zinc coating, the " Q " factor of an inductive circuit positioned at a predetermined distance from the surface of the coating is detected. Fig. 1 shows a coil wound on a core and the central limb of which is spaced from the plate 4 to be gauged. In Fig. 4 this coil is shown as 21 which, with capacitor C1, constitutes the toned circuit of transistor TR1 the negative resistance characters two of which produces oscillations. The amplitude of the oscillations is controlled by the " Q " of the inductive circuit which is said to be dependent on coating thickness. The voltage developed at the emitter load is amplified by TR2 and is of sufficient amplitude to prevent a multivibrator TR3, TR4, capable of producing an audible tone, from operating. If the oscillator out-put falls the audible tone is heard in an earpiece. Fig. 2 shows the arrangement in which all the elements except the earphones are mounted in the exploded assembly shown. A brass face-plate 8 is provided with free rolling ballswhich space the assembly from the work under test. Inside head 10 is the core assembly 14 while the electronic circuit is mounted in aluminium tube 6 on a tay board 16. Batteries 17 are mounted on a "Perspex" (Registered Trade Mark) block. A switch is provided on the end of tube 6 and a flexible lead connects the assembly to the earpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2820657A GB852541A (en) | 1957-09-06 | 1957-09-06 | Improvements in and relating to thickness measuring gauges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2820657A GB852541A (en) | 1957-09-06 | 1957-09-06 | Improvements in and relating to thickness measuring gauges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB852541A true GB852541A (en) | 1960-10-26 |
Family
ID=10271990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2820657A Expired GB852541A (en) | 1957-09-06 | 1957-09-06 | Improvements in and relating to thickness measuring gauges |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB852541A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2210761A1 (en) * | 1972-12-19 | 1974-07-12 | Lucas Electrical Co Ltd | |
| CN115655085A (en) * | 2022-11-15 | 2023-01-31 | 安徽大学 | Steel wire hot-dip coating on-line detection system and method |
| CN117432896A (en) * | 2023-12-20 | 2024-01-23 | 湖南千智机器人科技发展有限公司 | Device and method for detecting surface of object to be detected |
-
1957
- 1957-09-06 GB GB2820657A patent/GB852541A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2210761A1 (en) * | 1972-12-19 | 1974-07-12 | Lucas Electrical Co Ltd | |
| CN115655085A (en) * | 2022-11-15 | 2023-01-31 | 安徽大学 | Steel wire hot-dip coating on-line detection system and method |
| CN117432896A (en) * | 2023-12-20 | 2024-01-23 | 湖南千智机器人科技发展有限公司 | Device and method for detecting surface of object to be detected |
| CN117432896B (en) * | 2023-12-20 | 2024-02-23 | 湖南千智机器人科技发展有限公司 | Device and method for detecting surface of object to be detected |
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