US3732415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Headlight construction
Assignee: Robert Bosch GmbH
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Filing: 1970-09-25
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Granted: 1973-05-08
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Expires: 1990-09-25
Abstract
Abstract A cupped reflector is provided in its crown with an opening and has an open side opposite the crown. Its inner reflecting surface is to be protected against deleterious matter in the ambient temperature. A lens seal-tightly closes the open side and an incandescent bulb is received in the reflector and includes a socket lodged in the opening of the crown and having a radially projecting circumferential flange encircling and seal-tight with the socket. Mounting means removably mounts the bulb in the opening in seal-tight cooperation of the socket and flange with the reflector so that the interior of the reflector is pressuretightly and seal-tightly closed with respect to the ambient atmosphere.
Inventors
- 👤 G Lindae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:34
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/10; F21S41/19; F21S41/194
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
205 words
In a headlight of the removable-bulb type for automotive vehicles and the like, in combination a reflector assembly comprising a cup-shaped reflector having a larger-diameter front opening and a smaller-diameter rear opening, a first cylindrical sleeve extending through said rear opening into the interior of said reflector and having at the front end of said sleeve a radially inwardly projecting annular support ledge, said reflector having an inner reflecting surface to be protected from deleterious atmospheric matter; lens means seal-tightly closing said front opening; a bulb assembly comprising a cylindrical socket containing a bulb, an annular member encircling said socket and including a radially outwardly extending stop flange and defining with said socket an annular groove diverging in direction away from said bulb, and a sealing mass in said groove seal-tightly encircling said socket, said bulb assembly being located in said reflector assembly with said flange abutting against said ledge rearwardly of the latter to properly position said bulb assembly; an annular sealing ring in said sleeve rearwardly of said flange; and removable securing means for holding said flange against said ledge and said sealing ring against said flange and comprising a further cylindrical sleeve fitting into said first sleeve rearwardly of said sealing ring.
Claim 2
Dependent Claim
205 words
In a headlight of the removable-bulb type for automotive vehicles and the like, in combination a reflector assembly comprising a cup-shaped reflector having a larger-diameter front opening and a smaller-diameter rear opening, a first cylindrical sleeve extending through said rear opening into the interior of said reflector and having at the front end of said sleeve a radially inwardly projecting annular support ledge, said reflector having an inner reflecting surface to be protected from deleterious atmospheric matter; lens means seal-tightly closing said front opening; a bulb assembly comprising a cylindrical socket containing a bulb, an annular member encircling said socket and including a radially outwardly extending stop flange and defining with said socket an annular groove diverging in direction away from said bulb, and a sealing mass in said groove seal-tightly encircling said socket, said bulb assembly being located in said reflector assembly with said flange abutting against said ledge rearwardly of the latter to properly position said bulb assembly; an annular sealing ring in said sleeve rearwardly of said flange; and removable securing means for holding said flange against said ledge and said sealing ring against said flange and comprising a further cylindrical sleeve fitting into said first sleeve rearwardly of said sealing ring.
Claim 3
Dependent Claim
18 words
In a headlight as defined in claim 1, wherein said socket and said flange are of metallic material.
Claim 4
Dependent Claim
74 words
In a headlight as defined in claim 1, said flange being a discrete annular member having a center opening bounded by a frustoconically convergent marginal circumferential zone, and said socket extending through said center opening and having an outer peripheral surface defining with said marginal circumferential zone said annular groove, and said sealing mass completely filling said annular groove, sealing the juncture between said socket and member and connecting the latter to the former.
Claim 5
Dependent Claim
16 words
In a headlight as defined in claim 3, wherein said groove is of substantially wedge-shaped cross-section.
Claim 6
Dependent Claim
22 words
In a headlight as defined in claim 3, said socket and member being of metallic material, and said sealing mass being solder.
Claim 7
Dependent Claim
15 words
In a headlight as defined in claim 3, wherein said mass is an adhesive substance.
Claim 8
Dependent Claim
47 words
In a headlight as defined in claim 1, said socket having an open rear end portion; an electrically insulating member closing said open end portion; and bonding means pressure-tightly bonding said insulating member to said open end portion for preventing entry of atmospheric matter into the latter.
Claim 9
Dependent Claim
17 words
In a headlight as defined in claim 7, wherein said insulating member is of synthetic plastic material.
Claim 10
Dependent Claim
37 words
In a headlight as defined in claim 7; further comprising terminals provided on said insulating member exteriorly of said socket, and A filament located in said bulb and having connecting portions pressure-tightly soldered to the respective terminals.
Claim 11
Dependent Claim
42 words
In a headlight as defined in claim 7, said insulating member having an evacuating aperture for evacuating the interior of said bulb and socket; and sealing means pressure-tightly sealing said aperture subsequent to evacuation for preventing the entry of said deleterious matter.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |