US4388678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reading and viewing lamp
Assignee: Individual
•
Filing: 1980-10-14
•
Granted: 1983-06-14
•
Expires: 2000-10-14
Abstract
Abstract This invention provides an improved reading or viewing lamp that achieves extraordinary visual acuity when properly used. The lamp employs a quartz-halogen bulb together with a parabolic lens to provide a collimated beam. A light filter removes heat radiation and ultra violet radiation from the beam. A convex mirror reflects the filtered light beam to the reading or viewing area where because of the point source characteristic of the bulb and the remaining optics, the rays are substantially non-crossing and transversely coherent in the reading or viewing area. In one embodiment, the collimated beam is directed vertically and tubular light shield surrounding the collimated light beam and a cylindrical shield around the convex mirror reduces transverse radiation of light to other parts of the room. The shield around the collimated beam also provides a chimney effect which disperses the heat throughout the room to points remote from the reader.
Inventors
- 👤 Wheeler M. Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:18
CPC Classifications
F; F21; F21V; F21V9/00; F21V9/04; F21S; F21S6/00; F21S6/005; F21S6/006; F21V11/00; F21V11/16; F21V13/00; F21V13/02; F21V13/08; F21V13/10; F21V7/00; F21V7/0008; F21V7/22; F21V7/24; F21V9/06; F21V9/08; F21V9/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
104 words
In apparatus for directly illuminating an area with a diverging light beam wherein written material or other objects are adapted to be directly viewed in the directly illuminated area, the combination of: a convex mirror mounted to receive a collimated beam of light and to reflect the collimated beam of light into a diverging beam of light which is directed towards that area; and means including a source of light for directing a collimated beam of light toward said convex mirror for reflection toward that area, whereby the area is illuminated primarily by light of substantially non-crossing, diverging and unidirectional quality throughout said area.
Claim 2
Dependent Claim
104 words
In apparatus for directly illuminating an area with a diverging light beam wherein written material or other objects are adapted to be directly viewed in the directly illuminated area, the combination of: a convex mirror mounted to receive a collimated beam of light and to reflect the collimated beam of light into a diverging beam of light which is directed towards that area; and means including a source of light for directing a collimated beam of light toward said convex mirror for reflection toward that area, whereby the area is illuminated primarily by light of substantially non-crossing, diverging and unidirectional quality throughout said area.
Claim 3
Dependent Claim
34 words
In apparatus as in claim 1, the combination therewith of: filtering means in the path of said beam between said light source and said convex mirror for filtering out heat rays from the beam.
Claim 4
Dependent Claim
35 words
In apparatus as defined in claim 1, the combination therewith of: filtering means in the path of said beam between the light source and said convex mirror for filtering out ultra-violet rays from said beam.
Claim 5
Dependent Claim
37 words
Apparatus as defined in claim 1, the combination therewith of: filtering means in the path of said beam between said light source and said convex mirror for filtering out heat rays and ultra-violet rays from said beam.
Claim 6
Dependent Claim
34 words
The apparatus as in claim 2, the combination therewith of: a parabolic mirror for reflecting light from a substantially point source and for reflecting said light as a collimated beam toward said convex mirror.
Claim 7
Dependent Claim
53 words
In apparatus as in claim 5, the combination therewith of: a liquid cell mounted transversely of said collimated beam, said water cell comprising a pair of parallel flat plates that absorb ultra-violet radiation, said liquid cell being filled with heat-ray absorbing liquid, whereby the light beam remains collimated after passage through said cell.
Claim 8
Dependent Claim
34 words
In apparatus as defined in claim 1, the combination therewith of: a light shield surrounding said mirror for acting as a barrier to the transmission of light from said mirror in a horizontal direction.
Claim 9
Dependent Claim
37 words
In apparatus as defined in claim 5, the combination therewith of: an open ended opaque tube surrounding said collimated beam for preventing viewing of the light source and said parabolic mirror from the side of said beam.
Claim 10
Dependent Claim
45 words
In apparatus as defined in claim 6, the combination therewith of: an open ended opaque tube surrounding said collimated beam and said liquid filter for preventing viewing of the light source and said parabolic mirror and said liquid filter from the side of said beam.
Claim 11
Dependent Claim
50 words
In apparatus as defined in claim 1, the combination therewith of: means adjustably supporting said convex mirror for altering the direction of reflection of said beam relative to the direction of incidence of the beam on said convex mirror whereby the area illuminated by said reflected beam may be altered.
Claim 12
Dependent Claim
106 words
In apparatus for directly illuminating an area with a diverging light beam wherein reading material or other objects may be directly examined, the combination of: a support structure having a base member at the lower end thereof and a support member at the upper end thereof; means including a substantially point source of light and a parabolic mirror firmly mounted on a said base member for projecting a collimated beam of light upwardly toward said upper member; and a convex mirror mounted on said support member for intercepting said collimated beam and for reflecting the beam as a diverging beam transversely and downwardly toward said area.
Claim 13
Dependent Claim
106 words
In apparatus for directly illuminating an area with a diverging light beam wherein reading material or other objects may be directly examined, the combination of: a support structure having a base member at the lower end thereof and a support member at the upper end thereof; means including a substantially point source of light and a parabolic mirror firmly mounted on a said base member for projecting a collimated beam of light upwardly toward said upper member; and a convex mirror mounted on said support member for intercepting said collimated beam and for reflecting the beam as a diverging beam transversely and downwardly toward said area.
Claim 14
Dependent Claim
39 words
An apparatus as defined in claim 11, the combination therewith of: filtering means supported in the path of said beam between said point source and said convex mirror for filtering out heat rays and ultra-violet rays from the beam.
Claim 15
Dependent Claim
87 words
An apparatus as defined in claim 11 in which: said upper support member comprises two articulated arms, one of said arms being secured to said support structure and having an end remote from the support structure terminating near the center of said collimated beam and the other of said arms being pivotally connected to said remote end and means at the free end of said other arm adjustably supporting said convex mirror at the other end thereof whereby the direction of reflection toward said area is adjustable.
Claim 16
Dependent Claim
53 words
In apparatus as in claim 11, the combination therewith of: a liquid cell mounted transversely of said collimated beam, said liquid cell comprising a pair of parallel flat plates that absorb ultra-violet radiation, said liquid cell being filled with heat-ray absorbing liquid, whereby the light beam remains collimated after passage through said cell.
Claim 17
Dependent Claim
70 words
In apparatus as defined in claim 14, the combination therewith of: a light shield attached to and surrounding said convex mirror for acting as a barrier to the transmission of light from said mirror in a horizontal direction; and an open ended opaque tube supported from said base member surrounding said collimated beam for preventing viewing of the light source and said parabolic mirror from the side of said beam.
Claim 18
Dependent Claim
158 words
In apparatus as in claim 11, the combination therewith of: a liquid cell mounted transversely of said collimated beam, said liquid cell comprising a pair of parallel flat plates that absorb ultra-violet radiation, said liquid cell being filled with heat-ray absorbing liquid, whereby the light beam remains collimated after passage through said cell, an open ended opaque tube supported from said base member surrounding said collimated beam and said liquid cell for preventing viewing of the light source and said parabolic mirror and said liquid cell from the side of said beam, said upper support mirror comprising two articulated arms, one of said arms being secured to said support structure and having an end remote therefrom aligned with the central axis of said beam, and the other of said arms being pivotally connected to said remote end and adjustably supporting said convex mirror at the other end thereof whereby the direction of reflection toward said area is adjustable.
Claim 19
Dependent Claim
20 words
An apparatus as defined in claim 11 or in claim 16 wherein said convex mirror is a rear surface mirror.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |