IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0021738
(2008-01-29)
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등록번호 |
US-7832910
(2011-01-16)
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발명자
/ 주소 |
|
출원인 / 주소 |
- Thomas & Betts International, Inc.
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대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
4 |
초록
▼
A lighting fixture stanchion arm generally includes a housing, a guard lever supported in the housing, a switch mechanism supported in the housing and a locking pin. The housing has an entry for receiving a radial finger of a fixture head and an aperture for receiving the locking pin. The guard leve
A lighting fixture stanchion arm generally includes a housing, a guard lever supported in the housing, a switch mechanism supported in the housing and a locking pin. The housing has an entry for receiving a radial finger of a fixture head and an aperture for receiving the locking pin. The guard lever is movable from a home position to an away position by the radial finger of the fixture head upon rotation of the fixture head with respect to the housing, wherein the guard lever blocks the locking pin aperture of the housing when in the home position. The locking pin is insertable in the locking pin aperture of the housing for actuating the switch mechanism when the lever guard is moved to the away position by the radial finger of the fixture head.
대표청구항
▼
What is claimed is: 1. A lighting fixture comprising: a conduit; a stanchion arm attached to an upper end of said conduit; and a fixture head releasably coupled to said stanchion arm, said fixture head containing a source of illumination and having a radial finger disposed on a top thereof, wherein
What is claimed is: 1. A lighting fixture comprising: a conduit; a stanchion arm attached to an upper end of said conduit; and a fixture head releasably coupled to said stanchion arm, said fixture head containing a source of illumination and having a radial finger disposed on a top thereof, wherein said stanchion arm includes: a housing having an entry for receiving said radial finger of said fixture head and an aperture for receiving a locking pin; a guard lever supported in said housing, said guard lever being movable from a home position to an away position by said radial finger of said fixture head upon rotation of said fixture head with respect to said housing, said guard lever blocking said locking pin aperture of said housing when in said home position; a switch mechanism supported in said housing; and a locking pin insertable in said locking pin aperture of said housing for actuating said switch mechanism when said lever guard is moved to said away position by said radial finger of said fixture head. 2. A lighting fixture as defined in claim 1, wherein said fixture head further comprises: a base; a boss extending upwardly from said base, said boss having an opening for passage of wires from said fixture head to said stanchion arm housing, said radial finger extending radially outward from said boss at a distance from said base thereby forming a gap therebetween; and a counter-finger extending radially outward from said boss, said counter finger being coplanar with said finger. 3. A lighting fixture as defined in claim 2, wherein said entry of said housing is key-hole shaped for insertion therethrough of said radial finger, said boss and said counter-finger of said fixture head, wherein a portion of said housing surrounding said entry is captured in said gap of said fixture head upon rotation of said fixture head boss in said housing. 4. A lighting fixture as defined in claim 1, wherein said radial finger of said fixture head includes a locking pin aperture for receiving said locking pin of said stanchion arm, said radial finger aperture aligning with said housing locking pin aperture when said lever guard is moved to said away position by said radial finger. 5. A lighting fixture as defined in claim 1, wherein said guard lever is pivotably connected to said housing about a pivot point. 6. A lighting fixture as defined in claim 5, wherein said guard lever comprises a blocking face and a tab angularly spaced from said blocking face about said pivot point, said blocking face blocking said locking pin aperture of said housing when said guard lever in said home position, and said tab being engageable with said radial finger of said fixture head upon rotation of said fixture head to move said guard lever to said home position. 7. A lighting fixture as defined in claim 1, wherein said switch mechanism comprises: a limit switch; and an actuating arm pivotably connected at one end to said limit switch and having an engagement portion engageable with said locking pin upon insertion of said locking pin through said locking pin aperture of said housing. 8. A lighting fixture as defined in claim 7, wherein at least a portion of said guard lever is disposed between said locking pin aperture of said housing and said engagement portion of said actuating arm when said guard lever is in said home position, said portion of said guard lever thereby blocking engagement of said engagement portion of said actuating arm by said locking pin. 9. A lighting fixture as defined in claim 7, wherein said actuating arm has a home position, wherein said limit switch is in an open state. 10. A lighting fixture as defined in claim 7, wherein said actuating arm comprises a contact member pivotably connected at one end to said stanchion arm housing and having an engagement face disposed thereon, said engagement face forming said engagement portion of said actuating arm. 11. A lighting fixture stanchion arm for receiving a fixture head containing a source of illumination, the stanchion arm comprising: a housing having an entry for receiving a radial finger of the fixture head and an aperture for receiving a locking pin; a guard lever supported in said housing, said guard lever being movable from a home position to an away position by the radial finger of the fixture head upon rotation of the fixture head with respect to the housing, said guard lever blocking said locking pin aperture of said housing when in said home position; a switch mechanism supported in said housing; and a locking pin insertable in said locking pin aperture of said housing for actuating said switch mechanism when said lever guard is moved to said away position by said radial finger of said fixture head. 12. A stanchion arm as defined in claim 11, wherein said guard lever is pivotably connected to said housing about a pivot point. 13. A stanchion arm as defined in claim 12, wherein said guard lever comprises a blocking face and a tab angularly spaced from said blocking face about said pivot point, said blocking face blocking said locking pin aperture of said housing when said guard lever in said home position, and said tab being engageable with said radial finger of said fixture head upon rotation of said fixture head to move said guard lever to said home position. 14. A stanchion arm as defined in claim 11, wherein said switch mechanism comprises: a limit switch; and an actuating arm pivotably connected at one end to said limit switch and having an engagement portion engageable with said locking pin upon insertion of said locking pin through said locking pin aperture of said housing. 15. A stanchion arm as defined in claim 14, wherein at least a portion of said guard lever is disposed between said locking pin aperture of said housing and said engagement portion of said actuating arm when said guard lever is in said home position, said portion of said guard lever thereby blocking engagement of said engagement portion of said actuating arm by said locking pin. 16. A stanchion arm as defined in claim 14, wherein said actuating arm has a home position, wherein said limit switch is in an open state. 17. A stanchion arm as defined in claim 14, wherein said actuating arm comprises a contact member pivotably connected at one end to said stanchion arm housing and having an engagement face disposed thereon, said engagement face forming said engagement portion of said actuating arm. 18. A method for attaching a fixture head containing an illumination source to a stanchion arm of a lighting fixture, the method comprising the steps of: inserting a radial finger of said fixture head through an entry provided in a housing of said stanchion arm; rotating said fixture head with respect to said stanchion arm housing whereby said radial finger swings about an arc within said housing and engages a lever guard contained in said housing, said lever guard blocking a locking pin aperture of said housing when in a home position; rotating said fixture head further wherein said radial finger moves said lever guard away from said home position; and inserting a locking pin through said locking pin aperture of said housing whereby said pin engages a portion of an actuating arm of a switch mechanism in the housing thereby providing electrical power to said illumination source of said fixture head. 19. A method as defined in claim 18, wherein said pin insertion step comprises the step of locking said fixture head to said stanchion arm housing with said locking pin. 20. A method as defined in claim 19, wherein said pin insertion step comprises the step of inserting said pin through a locking pin aperture provided on said radial finger, after said radial finger has moved said lever guard out of said home position, to lock said fixture head to said stanchion arm.
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