US4170035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display lamp having a translucent envelope
Assignee: Crestworth Ltd
•
Filing: 1977-10-11
•
Granted: 1979-10-02
•
Expires: 1997-10-11
Abstract
Abstract A display lamp which includes a container and a source of light and heat mounted adjacent to the container, and, within the container, a liquid in which are suspended a number of insoluble reflecting flakes, the container being substantially surrounded by an envelope at least part of which is translucent.
Inventors
- 👤 Edward C. Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:47
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/24; F; F21; F21S; F21S10/00; F21S10/002; F21V; F21V3/00; F21V3/02; F21W; F21W2121/00; Y; Y10; Y10S; Y10S362/00; Y10S362/806
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
A display lamp comprising: (a) a base, (b) a container of light transmitting material carried by and upstanding from said base, said container having a lower wall, (c) a light transmitting liquid within said container, (d) a plurality of insoluble light reflecting particles suspended within said liquid, said particles and liquid having substantially the same specific gravity, (e) a heat producing light source mounted within said base adjacent said lower wall of said container for transmitting light through said liquid for reflection by said particles outwardly through said container as multiple light beams and for heating said liquid to create convection currents which agitate said particles for imparting movement to the light beams reflected thereby and varying the size and shape thereof, and (f) an envelope positioned in outwardly-spaced substantially surrounding relationship to said container and having a substantial translucent area acting as a screen on which said light beams reflected by said particles are projected to produce thereon a continuously varying random light pattern visible externally of said envelope.
Claim 2
Dependent Claim
170 words
A display lamp comprising: (a) a base, (b) a container of light transmitting material carried by and upstanding from said base, said container having a lower wall, (c) a light transmitting liquid within said container, (d) a plurality of insoluble light reflecting particles suspended within said liquid, said particles and liquid having substantially the same specific gravity, (e) a heat producing light source mounted within said base adjacent said lower wall of said container for transmitting light through said liquid for reflection by said particles outwardly through said container as multiple light beams and for heating said liquid to create convection currents which agitate said particles for imparting movement to the light beams reflected thereby and varying the size and shape thereof, and (f) an envelope positioned in outwardly-spaced substantially surrounding relationship to said container and having a substantial translucent area acting as a screen on which said light beams reflected by said particles are projected to produce thereon a continuously varying random light pattern visible externally of said envelope.
Claim 3
Dependent Claim
13 words
A lamp according to claim 1 in which the envelope is generally spherical.
Claim 4
Dependent Claim
21 words
A lamp according to claim 1 in which the envelope is made of a synthetic plastics material of the acrylic type.
Claim 5
Dependent Claim
21 words
A lamp according to claim 1 in which the envelope is made in two complementary halves, secured together by securing means.
Claim 6
Dependent Claim
31 words
A lamp according to claim 1 in which the envelope is made in two complementary halves and the two halves are constructed as a tight push fit one into the other.
Claim 7
Dependent Claim
37 words
A lamp according to claim 1 in which the base has inner and outer walls which define a space therein, the envelope being carried by the outer base wall and being connected thereto by liquid-tight sealing means.
Claim 8
Dependent Claim
31 words
A lamp according to claim 1 in which the base has an inner base structure having an upwardly-opening recess adapted to securely receive and support a lower end of the container.
Claim 9
Dependent Claim
27 words
A display lamp according to claim 7 in which the said base is an outer base which supports but is not connected to the inner base structure.
Claim 10
Dependent Claim
51 words
The lamp as defined in claim 1 wherein said heat producing light source includes means for transmitting light of a plurality of different colors through said liquid for reflection as different colored beams of light by said particles so that the varying random pattern on said envelope also has varying colors.
Claim 11
Dependent Claim
16 words
The lamp as defined in claim 9 wherein said lower wall of said container is transparent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |