US4680684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bed reading lamp, particularly for hospital beds
Assignee: Zumtobel AG
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Filing: 1985-10-24
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Granted: 1987-07-14
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Expires: 2005-10-24
Abstract
Abstract A bed reading lamp, particularly for hospital rooms, includes a lamp housing attachable to a wall of a room, the lamp housing including at least one cover which closes a light outlet opening provided in the lower area of the housing and which is translucent and serves to guide the light. The cover includes a lower first portion having an inclined part and a horizontal part and a second portion connected to the first portion. The inclined part and the second portion have prismatic profiles on their sides facing the lamp. The height of the prismatic profiles of the inclined part of the first portion decreases toward the horizontal part of the first portion. The cover provides a light distribution which ensures that neither the person lying in the bed provided with the lamp nor a person in a bed on an opposite wall will be blinded by the light of the lamp.
Inventors
- 👤 Wolfgang Wolber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:32
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/02; F21S; F21S8/00; F21S8/03; F21S8/033; F21V23/00; F21V23/001; F21V23/002; F21W; F21W2131/00; F21W2131/20; F21W2131/208; F21Y; F21Y2103/00; F21Y2113/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
205 words
Bed reading lamp, particularly for hospital rooms, comprising a lamp housing, which is preferably attachable to a wall of a room comprising at least one tubular, elongate lamp and a reflector and at least one cover which closes a light outlet opening provided in the lower area of said housing and which is translucent and serves to guide the light and comprises a lower first portion and a front upright second portion connected to the latter, characterized in that said first portion (20) of said cover (16) located under said lamp (2) has a horizontal part (22) and a part (21) which is inclined downwardly toward said horizontal part (22)at an angle α of approximately 6° to 10° relative to said horizontal part (22) said inclined part (21) having a prismatic profile (24) parallel to the axis of said lamp (2) on its side facing said lamp (2) and said second portion (25) comprises a prismatic profile (26) at its inside and encloses an angle β of approximately 40°-50° relative to said horizontal part (22), wherein the height (H) of said prismatic profiles (24) of said inclined part (21) decreases and said aperture angle increases toward the horizontal part (22) of said first portion (20).
Claim 2
Dependent Claim
205 words
Bed reading lamp, particularly for hospital rooms, comprising a lamp housing, which is preferably attachable to a wall of a room comprising at least one tubular, elongate lamp and a reflector and at least one cover which closes a light outlet opening provided in the lower area of said housing and which is translucent and serves to guide the light and comprises a lower first portion and a front upright second portion connected to the latter, characterized in that said first portion (20) of said cover (16) located under said lamp (2) has a horizontal part (22) and a part (21) which is inclined downwardly toward said horizontal part (22)at an angle α of approximately 6° to 10° relative to said horizontal part (22) said inclined part (21) having a prismatic profile (24) parallel to the axis of said lamp (2) on its side facing said lamp (2) and said second portion (25) comprises a prismatic profile (26) at its inside and encloses an angle β of approximately 40°-50° relative to said horizontal part (22), wherein the height (H) of said prismatic profiles (24) of said inclined part (21) decreases and said aperture angle increases toward the horizontal part (22) of said first portion (20).
Claim 3
Dependent Claim
84 words
Bed reading lamp according to claim 1, characterized in that the aperture angle of said prismatic profiles (24) at said first portion (20) is approximately 45°-55° and the center plane (M) extending through the apexes (S) of said prismatic profiles (24) is at a slant relative to an imaginary vertical plane (V) and the inclination angle between said two planes (M-V) is greater than the inclination angle α of said inclined part (21) of said first portion (20) relative to said horizontal part 22.
Claim 4
Dependent Claim
35 words
Bed reading lamp according to claim 1, characterized in that the quantity of said prismatic profiles (24) having a same height (H) relative to the quantity of said profiles having reduced height is approximately 2:1.
Claim 5
Dependent Claim
57 words
Bed reading lamp according to claim 1, characterized in that the aperture angle of said prismatic profiles (26) at said second portion (25) is approximately 90° and the width (B) of the respective upper flank (30) is approximately three times as great as the width (b) of the respective lower flank (31) of said prismatic profile (26).
Claim 6
Dependent Claim
38 words
Bed reading lamp according to claim 1, characterized in that said inclined portion (21) and said second portion (25) of said cover (16) which have said profiles (24,26) are located beneath said lamp (2) forming the light source.
Claim 7
Dependent Claim
28 words
Bed reading lamp according to claim 5, characterized in that said lamp (2) vertically lies above said profile (24) of said inclined part (21) of said first portion.
Claim 8
Dependent Claim
16 words
Bed reading lamp according to claim 1, characterized in that said horizontal part (22) is non-profiled.
References Cited (Backward Citations)
DE330291C
Cited
US3022416A
Cited
GB955404A
Cited
US3340393A
Cited
US3647148A
Cited
US4071750A
Cited
DE2630556A1
Cited
US4450509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |