# US 10,479,646 B2 · Solution for compensating an effect of temperature change in a proximity sensor in a machinery brake of an elevator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,479,646 B2 - Document ID: US10479646B2 - Status: Granted - Kind: B2 - Application number: 15/491,472 - Filed: 2017-04-19 - Published: 2017-11-02 - Granted: 2019-11-19 - Earliest claimed: 2016-04-28 - Assignees: Kone Corporation - Applicants: KONE Corporation - Inventors: Henri Vakkamäki; Janne Rossi; Timo Korhonen; Zhizhong Yan - Web page: https://patentgrep.com/patent/US10479646B2 ## CPC - B66B 1/36: Means for stopping the cars, cages, or skips at predetermined levels - B66B 1/32: effective on braking devices {, e.g. acting on electrically controlled brakes (brake control H02P, lift brakes per se B66B5/02)} - H03K 17/9502: {Measures for increasing reliability} - H03K 2217/94026: Automatic threshold calibration; e.g. threshold automatically adapts to ambient conditions or follows variation of input - H03K 2217/96038: Inductive touch switches - B66B: ELEVATORS; ESCALATORS OR MOVING WALKWAYS ({apparatus for raising or lowering persons on theatrical stages or the like A63J5/12} ; funicular railbound systems with rigid ground-supported tracks and cable traction, e.g. cliff railways, B61B9/00; arrangements of ammunition handlers in vessels B63G3/00; hoists, lifts, or conveyors for loading or unloading in general B65G; braking or detent devices controlling normal movements of winding drums or barrels B66D; ship-lifting devices E02C; garages for many vehicles with mechanical means for lifting vehicles E04H6/12; hoists for feeding ammunition or projectiles to launching apparatus or to loading mechanisms F41A9/00) - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) ## Abstract A machinery brake of an elevator includes a frame part including an electromagnet, an armature part, an inductive proximity sensor indirectly mounted to one of the following: the frame part, the armature part, and a target mounted to another of the following: the frame part, armature part. The machinery brake further includes, for establishing the indirect mounting: a temperature change compensation device mounted between the inductive proximity sensor and one of the following: the frame part, the armature part. Some aspects relate to a method for compensating a change in switching point of an inductive proximity sensor. ## Claims ### Claim 1 A machinery brake of an elevator, the machinery brake comprises: a frame part comprising an electromagnet; an armature part; an inductive proximity sensor indirectly mounted to one of the following: the frame part, the armature part; and a target mounted to another of the following: the frame part, and the armature part; wherein the machinery brake further comprises, for establishing the indirect mounting: a temperature change compensation device mounted between the inductive proximity sensor and the one of the following: the frame part, and the armature part. ### Claim 2 (depends on 1) The machinery brake of claim 1, wherein a first mounting device-used in mounting the temperature change compensation device to one of the frame part and the armature part, deviates from a second mounting device used in mounting the inductive proximity sensor to the temperature change compensation device. ### Claim 3 (depends on 2) The machinery brake of the claim 2, wherein the first and second mounting devices are screws. ### Claim 4 (depends on 3) The machinery brake of claim 3, wherein the temperature change compensation device is configured to be mounted with the first and second mounting devices at a top section of the temperature change compensation device. ### Claim 5 (depends on 3) The machinery brake of claim 3, wherein a material of the temperature change compensation device is such that it expands to an opposite direction with respect to a change in a position of a switching point of the inductive proximity sensor in response to a temperature change. ### Claim 6 (depends on 2) The machinery brake of claim 2, wherein the temperature change compensation device is configured to be mounted with the first and second mounting devices at a top section of the temperature change compensation device. ### Claim 7 (depends on 6) The machinery brake of claim 6, wherein a material of the temperature change compensation device is such that it expands to an opposite direction with respect to a change in a position of a switching point of the inductive proximity sensor in response to a temperature change. ### Claim 8 (depends on 2) The machinery brake of claim 2, wherein a material of the temperature change compensation device is such that it expands to an opposite direction with respect to a change in a position of a switching point of the inductive proximity sensor in response to a temperature change. ### Claim 9 (depends on 1) The machinery brake of claim 1, wherein a material of the temperature change compensation device is such that it expands to an opposite direction with respect to a change in a position of a switching point of the inductive proximity sensor in response to a temperature change. ### Claim 10 (depends on 9) The machinery brake of the claim 9, wherein the material of the temperature compensation device is polyphenylene sulfide doped with graphene when a housing of the inductive proximity sensor is polypropylene doped with graphene. ### Claim 11 A method for compensating a change in switching point of a proximity sensor due to change in temperature in a machinery brake, the method comprises: arranging a temperature change compensation device between the proximity sensor and one of the following: a frame part of the machinery brake, an armature part of the machinery brake, wherein the material of the temperature change compensation device is such that it expands to an opposite direction with respect to a change in a switching point of the inductive proximity sensor in response to a temperature change.