LIGHT FIXTURE SUPPORT

• US 3,561,719 A
• Filed: 09/24/1969
• Issued: 02/09/1971
• Est. Priority Date: 09/24/1969
• Status: Expired due to Term

• Current Assignee: James L. Grindle
• Original Assignee: James L. Grindle
• Inventors: Grindle, James L.
• Application Number:
  US04/860,676
• Time in Patent Office: 503 Days
• US Class Current: 248/343
• CPC Class Codes: F21V 21/005 for several lighting devices in an end-to-end arrangement, i.e. light tracks
• CPC Class Codes: F21V 21/02 Wall, ceiling, or floor bases; Fixing pendants or arms to the bases F21V21/08 takes precedence; bases for movable standing lamps F21V21/06

Abstract

Hanger device for supporting industrial luminaire from ceiling conduit. Cover of ballast housing at top of luminaire has central aperture for receiving conduit and a mounting bushing threaded internally for engaging threaded conduit and threaded externally for engaging locking nut slidably positioned on conduit above the luminaire cover. The central aperture of the cover is formed with spaced inwardly directed lugs against which complementary radial arms of the mounting bushing are clamped upon tightening of the locking nut. The luminaire is hung on the conduit by pushing it upwardly over the mounting bushing attached to the conduit, turning it until the radial lugs of the cover aperture are aligned with the radial arms of the bushing, and tightening the locking nut on the mounting bushing.

Claims

1. Mounting device for attaching a fixture to a supporting member comprising, in combination, a housing portion of said fixture formed with an aperture havIng circumferentially spaced lug members directed inwardly therein, a tubular mounting member arranged in said aperture and having spaced radially projecting arm members arranged below said lug members, the respective lug members and arm members being adapted to be positioned in alignment with one another upon turning of said housing portion relative to said mounting member, said mounting member having means for attaching the same to the supporting member, and annular locking means having a lower portion adjustably engaging said mounting member and an upper flange portion engageable with said housing portion adjacent the aperture therein, said locking means being adjustable for tightening the same on said mounting means with said lug members and said adjacent housing portion clamped therebetween.

2. A device as defined in claim 1, said stop means on said mounting member engageable with said lug members for limiting turning of said housing portion relative to said mounting member and for aligning said lug members and said arm members.

3. A device as defined in claim 2, said housing portion having holding means projecting inwardly in said aperture below said lug members for limiting the insertion of said mounting member in said aperture to a predetermined position for preventing clearance between said lug members and said stop means during turning of said housing portion relative to said mounting member.

4. A device as defined in claim 3, said attaching means of said mounting member comprising an internally threaded portion of said mounting member for engagement with the supporting member, said mounting member being externally threaded for engagement with said locking means.

5. A device as defined in claim 4, and means for fixedly securing said mounting member to the supporting member.

6. A device as defined in claim 2, each said arm member being formed with a bearing surface extending transverse the axis of said mounting member, said stop means comprising a first ridge extending upwardly from each said bearing surface, and a second ridge shorter than said first ridge and spaced therefrom extending upwardly from said bearing surface said bearing surface and said first and second ridges thereof defining a seat for receiving the respective lug member.

7. A device as defined in claim 6, said housing portion having holding means projecting inwardly in said aperture below said lug members for limiting the insertion of said mounting member in said aperture, the distance between the top plane of said holding means and the bottom plane of said lug members being less than the distance between the bottom plane of said mounting member and the top plane of said first ridge, and being greater than the distance between the bottom plane of said mounting member and the top plane of said second ridge.

8. A device as defined in claim 3, said mounting member being formed at its bottom with a polygonal portion, whereby it may be operated by a wrench.