Illumination – Light source and modifier – Including reflector
Patent
1977-07-18
1978-12-05
Nelson, Peter A.
Illumination
Light source and modifier
Including reflector
362 80, 362215, 362255, 362336, 362366, F21V 700
Patent
active
041288645
ABSTRACT:
An improved pressed glass lens member for a sealed beam lamp unit is provided to include an outer sealing rim of varying thickness to compensate for thermal contraction of the lens member when molded in a predetermined manner. Specifically, the ordinary warped condition encountered with thermal contraction of the pressed glass article when initially formed is compensated for so as to permit subsequent heat sealing with a pressed glass reflector member by thermally fusing the glass material of both members in the sealing regions and without encountering the manufacturing defects now being experienced. The preferred embodiments illustrate such controlled thickness variation of the body section in the outer sealing rim region of a pressed glass lens member for both circular-shaped and rectangular-shaped lens configurations. Additionally, the rectangular-shaped pressed glass lens member embodiment illustrated can further include a molded projection provided on the back sealing surface of the rim region to further reduce unwanted deformation which otherwise occurs when the lens member is initially formed by pressing in glass molds.
REFERENCES:
patent: 2131828 (1938-10-01), Williamson
patent: 2148314 (1939-02-01), Wright
patent: 2762908 (1956-09-01), Gaither
patent: 2782297 (1957-02-01), Geissbuhler et al.
patent: 2901654 (1959-08-01), Myers
patent: 2907249 (1959-10-01), Hjermstad
patent: 2969162 (1961-01-01), Stutske
patent: 3093324 (1963-06-01), Dobrikin
patent: 3177356 (1965-04-01), Worden
patent: 3939337 (1976-02-01), Oda et al.
Brussee Warren T.
Ferris William G.
General Electric Company
Kempton Lawrence R.
McDevitt John F.
Nelson Peter A.
Neuhauser Frank L.
LandOfFree
Sealed beam lamp unit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sealed beam lamp unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sealed beam lamp unit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-289284