GB1269334A - Devices for the measurement of coefficients of friction - Google Patents
Devices for the measurement of coefficients of frictionInfo
- Publication number
- GB1269334A GB1269334A GB5227168A GB5227168A GB1269334A GB 1269334 A GB1269334 A GB 1269334A GB 5227168 A GB5227168 A GB 5227168A GB 5227168 A GB5227168 A GB 5227168A GB 1269334 A GB1269334 A GB 1269334A
- Authority
- GB
- United Kingdom
- Prior art keywords
- torque
- friction
- wheel
- efficient
- wheels
- 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
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
1,269,334. Determining co-efficients of friction. M. S. RHODES and G. W. THORN. April 2, 1970 [Jan. 5, 1969], No. 52271/68. Heading G1S. A device for measuring co-efficients of friction comprises a mobile structure with two running wheels 7, 8 respectively fixed and rotatable upon a common axle 6, the wheels being of different diameters, means providing a torque to resist relative angular movement of the wheels, and means responsive to the magnitude of the torque which when slippage of the rotatable wheel occurs, gives a measure of the co-efficient of frction between the perphery of the wheel and the surface over which it is moving. As described the torque is provided by two spring-loaded plungers 21 carrying brake pads 20 acting on a brake disc 19 on wheel 8. Axial movement of the rotatable wheel which is in screwthreaded engagement with the axle compresses springs 25 applying increasing braking torque to disc 19. The movement of the plungers is monitored by a potentiometer 31 in series with an ammeter calibrated in units of co-efficient of friction. Alternatively the brake pads are mounted on hydraulic rams; the increasing hydraulic pressure is monitored to indicate co-efficient of friction. Alternatively a torsion spring is anchored to the frame 12 of the device and provided with a means for measuring the torque, in this case the bearing between the rotatable wheel and the axle is plain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5227168A GB1269334A (en) | 1969-01-05 | 1969-01-05 | Devices for the measurement of coefficients of friction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5227168A GB1269334A (en) | 1969-01-05 | 1969-01-05 | Devices for the measurement of coefficients of friction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1269334A true GB1269334A (en) | 1972-04-06 |
Family
ID=10463281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5227168A Expired GB1269334A (en) | 1969-01-05 | 1969-01-05 | Devices for the measurement of coefficients of friction |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1269334A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4144748A (en) * | 1977-10-26 | 1979-03-20 | Gosudarstvenny Proektno-Izyskatelsky i Nauchno-Issledovatelsky Institut "Aeroproekt" | Device for determining coefficient of adhesion of pneumatic wheel tires of transport vehicles to road pavement |
| EP0227003A2 (en) * | 1985-12-16 | 1987-07-01 | K.J. Law Engineers, Inc. | Measuring friction characteristics of vehicle travel surfaces |
| FR2656099A1 (en) * | 1989-12-19 | 1991-06-21 | France Etat | Device for measuring the degree of skidding (coefficient of friction) of a ground surface |
| US7908900B2 (en) | 2005-10-06 | 2011-03-22 | Thor Wiggo Olsen | Friction measuring device |
| CN109029838A (en) * | 2018-04-30 | 2018-12-18 | 交通运输部公路科学研究所 | Permanent tension traction device for side-friction calibration |
| CN109668682A (en) * | 2018-04-30 | 2019-04-23 | 交通运输部公路科学研究所 | A kind of side-friction calibrating installation and calibration method |
-
1969
- 1969-01-05 GB GB5227168A patent/GB1269334A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4144748A (en) * | 1977-10-26 | 1979-03-20 | Gosudarstvenny Proektno-Izyskatelsky i Nauchno-Issledovatelsky Institut "Aeroproekt" | Device for determining coefficient of adhesion of pneumatic wheel tires of transport vehicles to road pavement |
| EP0227003A2 (en) * | 1985-12-16 | 1987-07-01 | K.J. Law Engineers, Inc. | Measuring friction characteristics of vehicle travel surfaces |
| EP0227003A3 (en) * | 1985-12-16 | 1988-09-21 | K.J. Law Engineers, Inc. | Measuring friction characteristics of vehicle travel surfaces |
| FR2656099A1 (en) * | 1989-12-19 | 1991-06-21 | France Etat | Device for measuring the degree of skidding (coefficient of friction) of a ground surface |
| US7908900B2 (en) | 2005-10-06 | 2011-03-22 | Thor Wiggo Olsen | Friction measuring device |
| CN109029838A (en) * | 2018-04-30 | 2018-12-18 | 交通运输部公路科学研究所 | Permanent tension traction device for side-friction calibration |
| CN109668682A (en) * | 2018-04-30 | 2019-04-23 | 交通运输部公路科学研究所 | A kind of side-friction calibrating installation and calibration method |
| CN109029838B (en) * | 2018-04-30 | 2024-04-12 | 交通运输部公路科学研究所 | Constant-tension traction device for transverse friction force calibration |
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