Patent US4326243A successfully refreshed from Google Patents.
US4326243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric light fixture
Assignee: PISTOR and BOSS GmbH
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Filing: 1980-05-22
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Granted: 1982-04-20
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Expires: 2000-05-22
Abstract
Abstract Electric light fixture for the illumination of ovens of electric ranges characterized by a pot-shaped metallic mount insertable in a cut-out in an oven wall and holding a lamp socket, lamp and cover glass which can be screwed on to the front side of the fixture into said mounting and the mounting having a stop rim and holding members corresponding to the edge of the cut-out on its rearward side for the lamp socket which is held in position by resilient tabs and the light fixture being particularly characterized in that it can be mounted in position by a single person.
Inventors
- 👤 Max Pistor
- 👤 Ferdinand Pistor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:29
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/008; F21; F21W; F21W2131/00; F21W2131/30; F21W2131/307
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
248 words
An electric fixture for the illumination of ovens of electric ranges, comprising a pot-shaped metallic mounting part insertable into a cut-out in a wall of the oven and which holds the lamp socket and its lamp assembled, and a cover glass which is screwed on the front side into the mounting part, the mounting part having on its front side a stop rim and holding members corresponding to the edge of the cut-out and at its rear a central cut-out for the lamp socket which is held by spring tabs which are formed from the mounting part, the mounting part being provided on its wall with an internal thread and having over its entire length a smaller diameter than the stop rim, the mounting part having a plurality of radially outwardly extending spring tabs uniformly distributed on the periphery and cut free laterally and towards the stop rim, which spring tabs are curved at least slightly more than corresponds to the curvature of the mounting part, and the spring tabs having noses which extend laterally outwards at their free end towards the stop rim, the stop rim being bent over towards the bottom of the mounting part and screw threads impressed radially between the spring tabs with a resiliently tensionable sealing ring of metal clamped between the stop rim and the cover glass, an axially extending radially outwardly protruding rib being formed on the mounting part and insertable in a groove in the cut-out as an anti-twisting device.
Claim 2
Dependent Claim
248 words
An electric fixture for the illumination of ovens of electric ranges, comprising a pot-shaped metallic mounting part insertable into a cut-out in a wall of the oven and which holds the lamp socket and its lamp assembled, and a cover glass which is screwed on the front side into the mounting part, the mounting part having on its front side a stop rim and holding members corresponding to the edge of the cut-out and at its rear a central cut-out for the lamp socket which is held by spring tabs which are formed from the mounting part, the mounting part being provided on its wall with an internal thread and having over its entire length a smaller diameter than the stop rim, the mounting part having a plurality of radially outwardly extending spring tabs uniformly distributed on the periphery and cut free laterally and towards the stop rim, which spring tabs are curved at least slightly more than corresponds to the curvature of the mounting part, and the spring tabs having noses which extend laterally outwards at their free end towards the stop rim, the stop rim being bent over towards the bottom of the mounting part and screw threads impressed radially between the spring tabs with a resiliently tensionable sealing ring of metal clamped between the stop rim and the cover glass, an axially extending radially outwardly protruding rib being formed on the mounting part and insertable in a groove in the cut-out as an anti-twisting device.
Claim 3
Dependent Claim
48 words
An electric fixture according to claim 1, wherein the sealing ring has a radially extending surface which corresponds to a shoulder of the cover glass and passes into a slightly conical surface whose free end, which rests against the clamping surface, is bent over into a curved shape.
Claim 4
Dependent Claim
14 words
An electric fixture according to claim 1, wherein the sealing ring consists of aluminum.
Claim 5
Dependent Claim
35 words
An electric fixture according to claim 1, wherein the open cut between the stop rim and the noses of the spring tabs is covered at least approximately by the bent-over collar of the stop rim.
Claim 6
Dependent Claim
33 words
An electric fixture according to claim 1, wherein three spring tabs are provided in the mounting part and between them there are screw threads corresponding approximately to the tab cut-out in their length.
Claim 7
Dependent Claim
55 words
An electric fixture according to claim 1, wherein the three spring tabs and a ground connector are cut from the bottom of the mounting part and bent over outwards approximately at right angles to form a passage for the socket, the ground connector being formed as a flat connector bent over twice at its end.
Claim 8
Dependent Claim
19 words
An electric fixture according to claim 1, wherein the stop rim is formed to act as the sealing ring.
Claim 9
Dependent Claim
109 words
An electric fixture according to claim 1, wherein the mounting part, prior to being formed into pot shape, is a substantially flat strip-like member of rectangular elongated nature provided with a plurality of spaced spring tabs cut out of the strip-like member and having noses thereon, there being a space between the spring tabs and the adjacent parts of the member, pairs of generally parallel screw threads impressed in said member between said spring tabs and similarly impressed partial screw thread portions at the ends of the member and aligned therewith, upon the shaping of the member to final form, to constitute an additional pair of parallel screw threads.
Claim 10
Dependent Claim
37 words
An electric fixture according to claim 8, wherein the successive pairs of impressed screw threads and screw thread portions are in inclined alignment form from one end of the member to the other end of the member.
References Cited (Backward Citations)
US3313930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-19 | 1985-10-19 | 1986-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-19 | 1989-10-19 | 1990-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-19 | 1993-10-19 | 1994-04-20 | $7700.00 | Window Closed / Lapsed |