# US 4,400,673 A · Thermal switch housing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,400,673 A - Document ID: US4400673A - Status: Granted - Kind: A - Application number: 06/333,225 - Filed: 1981-12-21 - Granted: 1983-08-23 - Earliest claimed: 1981-12-21 - Assignees: Kiddo Consumer Durables Corporation - Inventors: Lester J. Gilman - Web page: https://patentgrep.com/patent/US4400673A ## CPC - H01H 37/5436: {mounted on controlled apparatus} - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) ## Abstract A thermal switch housing is provided in a recessed lighting fixture for interchangeably accommodating a thermal cut-off switch to protect against overtemperature conditions. The housing allows thermal switches having differing cut-off temperatures to be interchangeably removed and inserted to adjust for variations in fixture design, such as the size, shape and materials of construction. ## Claims ### Claim 1 An apparatus for interchangeably accommodating a thermal switch comprising: (a) a housing; (b) a channel disposed within said housing adapted to accommodate a thermal switch having an open or closed status, wherein said channel extends through a side of said housing to define a first access opening; (c) a pair of electrical contacts disposed within said housing and arranged along said channel to provide an electrical connection between said electrical contacts and terminals of said thermal switch; and (d) means for conductively connecting a pair of external electrical conductors to said electrical contacts wherein said thermal switch is interchangeably insertable through said first access opening into said channel such that an electrical path is established through said external electrical conductors when said thermal switch has been inserted and is in said closed status. ### Claim 2 (depends on 1) The apparatus according to claim 1 wherein said channel extends through a side of said housing which is opposite to said first access opening to define a second access opening. ### Claim 3 (depends on 2) The apparatus according to claim 2 wherein said means for conductively connecting a pair of external conductors to said electrical contacts comprises a pair of wires which enter said housing through said second access opening and are fixedly and conductively secured to said electrical contacts. ### Claim 4 (depends on 3) The apparatus according to claim 3 wherein said housing is comprised of a first half and a second half wherein said halves cooperatively engage to form said housing and means for maintaining said halves in cooperative engagement. ### Claim 5 (depends on 4) The apparatus according to claim 4 wherein said means for maintaining said halves in cooperative engagement comprises a plurality of cooperatively aligned openings defining holes, said holes being interiorly threaded to receive screws to maintain said halves in engagement. ### Claim 6 (depends on 5) The appartus according to claim 5 wherein each of said halves contains one of said electrical contacts. ### Claim 7 (depends on 6) The apparatus according to claim 6 wherein said housing is cylindrical. ### Claim 8 (depends on 7) The apparatus according to claim 7 wherein said channel is disposed along a line defining the diameter of said cylinder and wherein said first and second access openings are disposed in opposite facing walls of said cylinder. ### Claim 9 (depends on 8) The apparatus according to claim 8 wherein said pair of electrical contacts are diametrically disposed about said channel. ### Claim 10 (depends on 9) The apparatus according to claim 9 wherein one of said electrical contacts has contains a greater contacting surface area than the other of said pair of contacts. ### Claim 11 An apparatus for interchangeably accommodating a thermal switch comprising: (a) a cylindrical housing; (b) a channel disposed within said housing along a line defining the diameter of said cylindrical housing adapted to accommodate a thermal switch having an open or closed status, wherein said channel extends through opposite facing walls of said cylindrical housing to define first and second access openings; (c) a pair of electrical contacts disposed within said housing and diametrically disposed about said channel; and (d) means for connecting a pair of external electrical conductors to said electrical contacts wherein said thermal switch is interchangeably insertable through said first access opening into said channel and said external conductors enter through said second access opening and are fixedly and conductively secured to said electrical contacts such that an electric path is established through said external electrical conductors when said thermal switch has been inserted and is in said closed status. ### Claim 12 (depends on 2, 11) The apparatus according to claims 2 or 11 wherein said first access opening is larger than said second access opening. ### Claim 13 (depends on 11) The apparatus according to claim 11 wherein one of said electrical contacts has a greater contacting surface area that the other of said pair of contacts. ### Claim 14 (depends on 13) The apparatus according to claim 13 wherein said housing is comprised of a first half and a second half wherein said halves cooperatively engage to form said housing and means for maintaining said halves in cooperative engagement. ### Claim 15 (depends on 14) The apparatus according to claim 14 wherein said means for maintaining said halves in cooperative engagement comprises a plurality of cooperatively aligned openings defining holes, said holes being interiorly threaded to receive screws to maintain said halves in engagement. ### Claim 16 (depends on 15) The apparatus according to claim 15 wherein each of said halves contains one of said electrical contacts.