US3716710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp comprising an elongated light source,particularly a rod-shaped fluorescent lamp,and shade of transparent material
Assignee: Trilux GmbH and Co KG
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Filing: 1970-04-16
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Granted: 1973-02-13
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Expires: 1990-04-16
Abstract
Abstract A lamp comprising an elongated light source, such as a rodshaped fluorescent lamp, and a lamp shade of transparent material. The lamp shade has its surface provided with a first set of grooves defining ridged elevations between them and extending parallel to the axis of the elongated light source, and two sets of diagonal grooves symmetrically crossing said first set of grooves in such a manner that the vertex lines defining the bottoms of the troughs formed by the diagonal grooves intersect on the lines of the ridges between neighboring longitudinal grooves and thereby divide the surface into panels of which each contains a prismatic center configuration having a face on each side of a longitudinal ridge, two quarter faces divided by a hip at each end of the ridge and a triangular base pyramid adjoining the foot of the face on each side of the ridge.
Inventors
- 👤 F Clostermann
- 👤 H Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:13
CPC Classifications
F; F21; F21V; F21V5/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
200 words
A lamp comprising an elongated light source, such as at least one rod-shaped fluorescent lamp, and a lamp shade of transparent material, one surface of said shade having a plurality of spaced parallel longitudinal V-shaped grooves extending in a direction substantially parallel to the said elongated light source and forming paralLel ridges between adjacent pairs of said longitudinal grooves, and two sets of equally spaced parallel Vshaped grooves extending diagonally to said longitudinal grooves, one of said sets being transverse to said other set and the vertex lines of said diagonal grooves having points of intersection which are in a vertical plane with said ridges between the longitudinal grooves, the edges of both sets of adjacent parallel diagonal grooves being spaced from each other by a flattened ridge area, whereby configurations on hexagonal bases surrounded by pyramids on triangular bases are formed within each zone of the surface of the shade defined by adjacent pairs of diagonal grooves of both sets, said configurations on the hexagonal bases are elongated prisms with a ridge line extending parallel to the elongated light source, have inclined side faces defined by said longitudinal grooves and have inclined quarter faces defined by said diagonal grooves.
Claim 2
Dependent Claim
200 words
A lamp comprising an elongated light source, such as at least one rod-shaped fluorescent lamp, and a lamp shade of transparent material, one surface of said shade having a plurality of spaced parallel longitudinal V-shaped grooves extending in a direction substantially parallel to the said elongated light source and forming paralLel ridges between adjacent pairs of said longitudinal grooves, and two sets of equally spaced parallel Vshaped grooves extending diagonally to said longitudinal grooves, one of said sets being transverse to said other set and the vertex lines of said diagonal grooves having points of intersection which are in a vertical plane with said ridges between the longitudinal grooves, the edges of both sets of adjacent parallel diagonal grooves being spaced from each other by a flattened ridge area, whereby configurations on hexagonal bases surrounded by pyramids on triangular bases are formed within each zone of the surface of the shade defined by adjacent pairs of diagonal grooves of both sets, said configurations on the hexagonal bases are elongated prisms with a ridge line extending parallel to the elongated light source, have inclined side faces defined by said longitudinal grooves and have inclined quarter faces defined by said diagonal grooves.
Claim 3
Dependent Claim
200 words
A lamp comprising an elongated light source, such as at least one rod-shaped fluorescent lamp, and a lamp shade of transparent material, one surface of said shade having a plurality of spaced parallel longitudinal V-shaped grooves extending in a direction substantially parallel to the said elongated light source and forming paralLel ridges between adjacent pairs of said longitudinal grooves, and two sets of equally spaced parallel V-shaped grooves extending diagonally to said longitudinal grooves, one of said sets being transverse to said other set and the vertex lines of said diagonal grooves having points of intersection which are in a vertical plane with said ridges between the longitudinal grooves, the edges of both sets of adjacent parallel diagonal grooves being spaced from each other by a flattened ridge area, whereby configurations on hexagonal bases surrounded by pyramids on triangular bases are formed within each zone of the surface of the shade defined by adjacent pairs of diagonal grooves of both sets, said configurations on the hexagonal bases are elongated prisms with a ridge line extending parallel to the elongated light source, have inclined side faces defined by said longitudinal grooves and have inclined quarter faces defined by said diagonal grooves.
Claim 4
Dependent Claim
200 words
A lamp comprising an elongated light source, such as at least one rod-shaped fluorescent lamp, and a lamp shade of transparent material, one surface of said shade having a plurality of spaced parallel longitudinal V-shaped grooves extending in a direction substantially parallel to the said elongated light source and forming paralLel ridges between adjacent pairs of said longitudinal grooves, and two sets of equally spaced parallel V-shaped grooves extending diagonally to said longitudinal grooves, one of said sets being transverse to said other set and the vertex lines of said diagonal grooves having points of intersection which are in a vertical plane with said ridges between the longitudinal grooves, the edges of both sets of adjacent parallel diagonal grooves being spaced from each other by a flattened ridge area, whereby configurations on hexagonal bases surrounded by pyramids on triangular bases are formed within each zone of the surface of the shade defined by adjacent pairs of diagonal grooves of both sets, said configurations on the hexagonal bases are elongated prisms with a ridge line extending parallel to the elongated light source, have inclined side faces defined by said longitudinal grooves and have inclined quarter faces defined by said diagonal grooves.
Claim 5
Dependent Claim
87 words
A lamp according to claim 1 wherein the vertex lines of said diagonal grooves form squares, each square containing one of said configurations on the hexagonal base and two of said pyramids on triangular bases, said longitudinal grooves extending diagonally across each of said squares parallel to said elongated light source and the vertex lines of adjacent longitudinal grooves passing through opposite corners of each of said squares define isosceles, right angled triangles, the legs of which are half the length of a side of the square.
Claim 6
Dependent Claim
22 words
A lamp according to claim 1 wherein the diagonal grooves intersect the longitudinal grooves at an angle of less than 45* .
Claim 7
Dependent Claim
28 words
A lamp according to claim 1 wherein the diagonal grooves and longitudinal grooves include discontinuity lines at the same level with respect to the surface of the shade.
Claim 8
Dependent Claim
20 words
A lamp according to claim 1 wherein the angle at the ridge of the prismatic configuration is approximately 90* .
Claim 9
Dependent Claim
21 words
A lamp according to claim 1 wherein the vertex angle of both said longitudinal and diagonal grooves is about 90* .
Claim 10
Dependent Claim
20 words
A lamp according to claim 1 wherein the angle of the ridge of the prismatic configurations is approximately 130* .
Claim 11
Dependent Claim
20 words
A lamp according to claim 1 wherein the vertex angle of said longitudinal and diagonal grooves is approximately 130* .
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |