Brake block temperature and wear measuring device
First Claim
Patent Images
1. A thermocouple for use with a brake block having a friction element with a friction face adapted to be moved into contact with a braking face of a brake drum and for outputting a signal indicative alternatively of the steady state temperature of the brake block friction element and of the transient temperature of the friction element-brake drum interface which comprises:
- an erodible metallic plate forming one element of a junction of the thermocouple affixed to said brake block;
said plate having the same approximate depth as said friction element and having a working face parallel with said friction element friction face;
wherein said working face is adapted to engage said brake drum braking face when said brake block friction element is moved into contact with said brake drum such that said metallic plate erodes with said friction element in a direction perpendicular to said interface;
said plate having a width substantially greater than its thickness and sufficient to ensure that a substantial portion of said working face engages said brake drum braking face when said friction element is moved into contact with said brake drum; and
at least one alloy lead affixed to said plate to form the second element of said thermocouple junction.
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Abstract
A thermocouple for use with a brake block outputs a signal indicative alternatively of the steady state temperature of the brake block friction element and of the transient temperature of the friction element brake drum interface.
36 Citations
35 Claims
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1. A thermocouple for use with a brake block having a friction element with a friction face adapted to be moved into contact with a braking face of a brake drum and for outputting a signal indicative alternatively of the steady state temperature of the brake block friction element and of the transient temperature of the friction element-brake drum interface which comprises:
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an erodible metallic plate forming one element of a junction of the thermocouple affixed to said brake block; said plate having the same approximate depth as said friction element and having a working face parallel with said friction element friction face; wherein said working face is adapted to engage said brake drum braking face when said brake block friction element is moved into contact with said brake drum such that said metallic plate erodes with said friction element in a direction perpendicular to said interface; said plate having a width substantially greater than its thickness and sufficient to ensure that a substantial portion of said working face engages said brake drum braking face when said friction element is moved into contact with said brake drum; and at least one alloy lead affixed to said plate to form the second element of said thermocouple junction. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A brake block having a friction element with a friction face adapted to be moved into contact with a braking face of a brake drum and an integral thermocouple for outputting a signal indicative alternatively of the steady state temperature of the brake block friction element and of the transient temperature of the friction element-brake drum interface which comprises;
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an erodible metallic plate forming one element of a junction of the thermocouple affixed to said brake block; said plate having the same approximate depth as said friction element and having a working face parallel with said friction element friction face; wherein said working face is adapted to engage said brake drum braking face when said brake block friction element is moved into contact with said brake drum such that said metallic plate erodes with said friction element in a direction perpendicular to said interface; said plate having a width substantially greater than its thickness and sufficient to ensure that a substantial portion of said working face engages said brake drum braking face when said friction element is moved into contact with said brake drum; and at least one alloy lead affixed to said plate to form the second element of said thermocouple junction. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A brake pad having a friction element with a friction face adapted to be moved into contact with a braking face of a rotor and an integral thermocouple for outputting a signal indicative alternatively of the steady state temperature of the brake pad friction element and of the transient temperature of the friction element-rotor interface which comprises;
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an erodible metallic plate forming one element of a junction of the thermocouple affixed to said brake pad; said plate having the same approximate depth as said friction element and having a working face parallel with said friction element friction face; wherein said working face is adapted to engage said rotor braking face when said brake pad friction element is moved into contact with said rotor such that said metallic plate erodes with said friction element in a direction perpendicular to said interface; said plate having a width substantially greater than its thickness and sufficient to ensure that a substantial portion of said working face engages said rotor braking face when said friction element is moved into contact with said rotor; and at least one alloy lead affixed to said plate to form the second element of said thermocouple junction. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification