US4213591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint means for light fittings, such as office lamps
Assignee: Lival Oy AB
•
Filing: 1978-02-01
•
Granted: 1980-07-22
•
Expires: 1998-02-01
Abstract
Abstract A joint means for light fittings, such as office lamps, comprising pairs of bars arranged after one another and connected with each other by pairs of joint plates. The plates are pressed against each other and the bars with clamping screws. The bars are connected with the joint plates by means of protuberances on the plates extending into holes in the bars.
Inventors
- 👤 Aarno Jaakkola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:28
CPC Classifications
F; F16; F16M; F16M11/00; F16M11/02; F16M11/04; F16M11/06; F16M11/10; F16M11/20; F16M11/2092; F16M11/24; F16M13/00; F16M13/02; F21; F21V; F21V21/00; F21V21/14; F21V21/26; F16M2200/00; F16M2200/04; F16M2200/044; F16M2200/06; F16M2200/063; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32008; Y10T403/32024; Y10T403/32081; Y10T403/32114; Y10T403/32131; Y10T403/32147; Y10T403/32606; Y10T403/32819; Y10T403/32844
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
165 words
A support device for a light fitting, comprising a pair of first and second bars disposed side-by-side and substantially parallel to each other with an end of the first bar adjacent an end of the second bar, a pair of third and fourth bars disposed side-by-side and substantially parallel to each other with an end of the third bar adjacent an end of the fourth bar, and joint means connecting said ends of the first and second bars to said ends of the third and fourth bars and comprising a pair of joint plates which are disposed substantially parallel to each other with said ends of the bars therebetween, fixing members extending from each joint plate and entering respective holes in the side surfaces of the bars, and clamping means extending through the joint plates to adjust the rigidity of the connection established by the joint means, at least one of said fixing members consisting of a protuberance on the surface of a joint plate.
Claim 2
Dependent Claim
165 words
A support device for a light fitting, comprising a pair of first and second bars disposed side-by-side and substantially parallel to each other with an end of the first bar adjacent an end of the second bar, a pair of third and fourth bars disposed side-by-side and substantially parallel to each other with an end of the third bar adjacent an end of the fourth bar, and joint means connecting said ends of the first and second bars to said ends of the third and fourth bars and comprising a pair of joint plates which are disposed substantially parallel to each other with said ends of the bars therebetween, fixing members extending from each joint plate and entering respective holes in the side surfaces of the bars, and clamping means extending through the joint plates to adjust the rigidity of the connection established by the joint means, at least one of said fixing members consisting of a protuberance on the surface of a joint plate.
Claim 3
Dependent Claim
15 words
A support device as claimed in claim 1, wherein the protuberance is cylindrical in shape.
Claim 4
Dependent Claim
23 words
A support device as claimed in claim 1, wherein the protuberance has the shape of a truncated cone ending in a cylindrical tip.
Claim 5
Dependent Claim
165 words
A support device for a light fitting, comprising at least one pair of first and second bars disposed side-by-side and substantially parallel to each other with an end of the first bar adjacent an end of the second bar, an additional support member having an end portion, and joint means connecting said ends of the first and second bars to said additional support member and comprising a pair of joint plates which are disposed substantially parallel to each other with said ends of the bars and said end portion of the additional support member therebetween, fixing members extending from each joint plate and entering respective holes in the side surfaces of the bars, and clamping means extending through the joint plates to adjust the rigidity of the connection established by the joint means, at least one of said fixing members consisting of a protuberance on the surface of a joint plate, said protuberance having the shape of a truncated cone ending in a cylindrical tip.
Claim 6
Dependent Claim
165 words
A support device for a light fitting, comprising at least one pair of first and second bars disposed side-by-side and substantially parallel to each other with an end of the first bar adjacent an end of the second bar, an additional support member having an end portion, and joint means connecting said ends of the first and second bars to said additional support member and comprising a pair of joint plates which are disposed substantially parallel to each other with said ends of the bars and said end portion of the additional support member therebetween, fixing members extending from each joint plate and entering respective holes in the side surfaces of the bars, and clamping means extending through the joint plates to adjust the rigidity of the connection established by the joint means, at least one of said fixing members consisting of a protuberance on the surface of a joint plate, said protuberance having the shape of a truncated cone ending in a cylindrical tip.
Claim 7
Dependent Claim
29 words
A support device as claimed in claim 1, wherein said additional support member comprises a pin, and wherein a lamp shade is secured to the pin and supported thereby.
Claim 8
Dependent Claim
113 words
A support device as claimed in claim 4, wherein said additional support member comprises a third bar and the support device further comprises a fourth bar, the third and fourth bars being disposed side-by-side and substantially parallel to each other with an end of the third bar adjacent an end of the fourth bar, said joint means connecting said ends of the first and second bars to said ends of the third and fourth bars, said ends of the third and fourth bars being disposed between the joint plates and there being fixing members extending from each joint plate and entering respective holes in the side surfaces of the third and fourth bars.
Claim 9
Dependent Claim
17 words
A support device as claimed in claim 1 or 4, wherein the protuberance is produced by punching.
Claim 10
Dependent Claim
41 words
A support device as claimed in claim 1 or 4, wherein each of said bars comprises a tube of substantially square cross-section, and the height of the protuberance above the joint plate corresponds essentially to the wall thickness of the tube.
Claim 11
Dependent Claim
24 words
A support device as claimed in claim 1, or 4, wherein said clamping means are situated substantially at the center of said joint plates.
References Cited (Backward Citations)
US1108512A
Cited
GB149767A
Cited
GB305873A
Cited
GB351623A
Cited
GB393349A
Cited
US2195336A
Cited
AT197918B
Cited
US3214125A
Cited
US3188460A
Cited
US3419931A
Cited
US4003536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-22 | 1984-01-21 | 1984-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-22 | 1988-01-21 | 1988-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-22 | 1992-01-21 | 1992-07-22 | $7700.00 | Window Closed / Lapsed |