GB1603741A - Temperature and thickness monitor - Google Patents
Temperature and thickness monitor Download PDFInfo
- Publication number
- GB1603741A GB1603741A GB80578A GB80578A GB1603741A GB 1603741 A GB1603741 A GB 1603741A GB 80578 A GB80578 A GB 80578A GB 80578 A GB80578 A GB 80578A GB 1603741 A GB1603741 A GB 1603741A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lining
- brake
- thickness
- temperature
- semiconductor
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
- F16D66/022—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness
- F16D66/023—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness directly sensing the position of braking members
- F16D66/024—Sensors mounted on braking members adapted to contact the brake disc or drum, e.g. wire loops severed on contact
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D2066/001—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Description
(54) TEMPERATURE AND THICKNESS MONITOR
(71) We, TROLEX PRODUCTS
LIMITED, a British Company of Newby
Road, Hazel Grove, Stockport, Cheshire, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to a device for monitoring the thickness of a brake lining.
In hazardous areas, such as in coal mines, it is important that a warning of some kind is given when the thickness of the brake lining is reduced to a predetermined level.
The purpose of such a warning is to enable the lining to be replaced before the brake stops working efficiently. In addition to monitoring the thickness of the brake lining it is also desirable to monitor the temperature thereof because if the temperature rises that may cause ignition of gases or dust and an explosion may then occur.
According to the present invention there is provided a device for monitoring the thickness of a brake lining comprising a semiconductor device provided in the lining at a predetermined distance initially from the braking surface thereof, said semiconductor device being connected to a fail-safe circuit, so that said fail-safe circuit is actuated when the lining has worn away and the semiconductor device is damaged whereby the device no longer operates.
In a preferred embodime-nt of the invention the semi-conductor device is a diode whose operation varies with the temperature thereof. The semiconductor is connected to a power supply and to the coil of a relay so that in operation the relay contacts are held open. When the lining is reduced in thickness so that the diode is damaged by the brake drum the circuit is broken and the relay contacts close to complete an alarm circuit.
Current sensing means may also be provided, variations of current giving an indication of changes of temperature. The sensing means may also be linked to an alarm circuit so that when a predetermined temperature is attained an alarm will sound.
A special embodiment of the invention will now be described by way of example with reference to the accompanying drawing which is a section through a part of a brake.
Referring to the drawing an aperture 10 extends through brake shoe 12 into a brake lining 14 of a brake. A plug 16 of electrically non-conductive material, such as plastics, for example an epoxy resin, is received in aperture 10. A diode 18 is embedded in the plug, terminals 20 for the diode being provided on the exposed part of the plug by which the diode is connected in a detector circuit.
WHAT WE CLAIM IS: 1. A device for monitoring the thickness of a brake lining comprising a semiconductor device provided in the lining at a predetermined distance initially from the braking surface thereof, said semiconductor device being connected to a fail-safe circuit, so that said fail-safe circuit is actuated when the lining has worn away and the semi-conductor device is damaged whereby the device no longer operates.
2. A device as claimed in Claim 1, wherein the semiconductor is temperature responsive.
3. A device as claimed in Claim 1 or claim 2, wherein the semiconductor is connected to a power supply and to the coil of a relay so that, in operation, the relay contacts are held open.
4. A device as claimed in any preceding claim, wherein the semiconductor is embedded in a plug of non-conductive material received in an aperture in the brake lining.
5. A device for monitoring the thickness of a brake lining substantially as described herein with reference to the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (5)
1. A device for monitoring the thickness of a brake lining comprising a semiconductor device provided in the lining at a predetermined distance initially from the braking surface thereof, said semiconductor device being connected to a fail-safe circuit, so that said fail-safe circuit is actuated when the lining has worn away and the semi-conductor device is damaged whereby the device no longer operates.
2. A device as claimed in Claim 1, wherein the semiconductor is temperature responsive.
3. A device as claimed in Claim 1 or claim 2, wherein the semiconductor is connected to a power supply and to the coil of a relay so that, in operation, the relay contacts are held open.
4. A device as claimed in any preceding claim, wherein the semiconductor is embedded in a plug of non-conductive material received in an aperture in the brake lining.
5. A device for monitoring the thickness of a brake lining substantially as described herein with reference to the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB80578A GB1603741A (en) | 1978-05-23 | 1978-05-23 | Temperature and thickness monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB80578A GB1603741A (en) | 1978-05-23 | 1978-05-23 | Temperature and thickness monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1603741A true GB1603741A (en) | 1981-11-25 |
Family
ID=9710812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB80578A Expired GB1603741A (en) | 1978-05-23 | 1978-05-23 | Temperature and thickness monitor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1603741A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4658936A (en) * | 1985-07-25 | 1987-04-21 | Goodyear Aerospace Corporation | Brake temperature and wear indicator |
| US4790606A (en) * | 1985-01-23 | 1988-12-13 | Wabco Westinghouse Fahrzeugbremsen Gmbh | Apparatus for the measurement and/or regulation of a braking force and/or of a braking torque |
| US4824260A (en) * | 1988-04-13 | 1989-04-25 | Abex Corporation | Brake block temperature and wear measuring device |
| EP0999377A3 (en) * | 1998-11-03 | 2002-07-31 | Meritor Heavy Vehicle Systems, LLC | Brake shoe assembly having a brake lining wear and temperature sensor |
| US6686752B1 (en) | 2002-06-19 | 2004-02-03 | Fisher-Klosterman, Inc. | Wear indicator for refractory linings |
| CN116771831A (en) * | 2023-06-21 | 2023-09-19 | 东风商用车有限公司 | Temperature device for monitoring rotating part of clutch assembly |
-
1978
- 1978-05-23 GB GB80578A patent/GB1603741A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4790606A (en) * | 1985-01-23 | 1988-12-13 | Wabco Westinghouse Fahrzeugbremsen Gmbh | Apparatus for the measurement and/or regulation of a braking force and/or of a braking torque |
| US4658936A (en) * | 1985-07-25 | 1987-04-21 | Goodyear Aerospace Corporation | Brake temperature and wear indicator |
| US4824260A (en) * | 1988-04-13 | 1989-04-25 | Abex Corporation | Brake block temperature and wear measuring device |
| EP0337919A1 (en) * | 1988-04-13 | 1989-10-18 | Abex Corporation | Brake block temperature and wear measuring device |
| EP0999377A3 (en) * | 1998-11-03 | 2002-07-31 | Meritor Heavy Vehicle Systems, LLC | Brake shoe assembly having a brake lining wear and temperature sensor |
| US6686752B1 (en) | 2002-06-19 | 2004-02-03 | Fisher-Klosterman, Inc. | Wear indicator for refractory linings |
| CN116771831A (en) * | 2023-06-21 | 2023-09-19 | 东风商用车有限公司 | Temperature device for monitoring rotating part of clutch assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |