Joints and connections – Structurally installed in diverse art device
Patent
1996-10-30
1997-11-18
Knight, Anthony
Joints and connections
Structurally installed in diverse art device
403 22, 403 11, 403300, 362286, F21V 1900, F16B 718
Patent
active
056880642
ABSTRACT:
An inexpensive and reliable method and apparatus for selectively coupling the bulb stem of an electrodeless lamp to a rotatable drive shaft does not require side access to a set screw or an RF sealing arrangement. The coupler accommodates angular and eccentric misalignment of threadedly engageable members at relatively low manufacturing costs. A cylindrical coupler connected to the bulb stem is provided with a cylindrical cross-hole extending diametrically through and exposing the proximal end of the bulb stem in the longitudinal bore. A seating lock nut of generally rectangular configuration, and having a pair of opposite compressible turned out comers or "wings", is insertable through the cross-hole and is loosely retained at the intersection of the bore and cross-hole. The seating lock nut is sized, relative to the cross-hole and longitudinal bore, such that, upon being released within the cross-hole, the lock nut is loosely retained. The distal tip of the drive shaft is pointed to facilitate its entry into threaded aperture formed by bendable tongue members of the loosely retained seating lock nut. Rearwardly of its pointed end, the drive shaft is threaded to engage the nut threaded aperture. The resilient metal seating lock nut tends to deform at its bent tongues when the shaft threaded segment "bottoms out" during insertion. This deformation provides a locking function, causing the motor shaft to pull on the tongues of the lock nut, resulting in the elimination of any clearance between the two threaded members and thus creating a compressive pre-stress on the overall joint.
REFERENCES:
patent: 4752151 (1988-06-01), Ashida et al.
patent: 4921429 (1990-05-01), Brown
patent: 5269621 (1993-12-01), De Bortoli et al.
patent: 5404076 (1995-04-01), Dolan et al.
patent: 5447030 (1995-09-01), Wang et al.
patent: 5570549 (1996-11-01), Lung et al.
Fusion Lighting Inc.
Knight Anthony
LandOfFree
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