USRE30119E - Compact follow spot - Google Patents
Compact follow spot Download PDFInfo
- Publication number
- USRE30119E USRE30119E US05/741,070 US74107076A USRE30119E US RE30119 E USRE30119 E US RE30119E US 74107076 A US74107076 A US 74107076A US RE30119 E USRE30119 E US RE30119E
- Authority
- US
- United States
- Prior art keywords
- mirror
- light
- housing
- reflector
- focus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/14—Adjustable mountings
- F21V21/30—Pivoted housings or frames
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/40—Lighting for industrial, commercial, recreational or military use
- F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios
Definitions
- Another shortcoming of known follow spots relates to heat entrapment.
- a conventional follow spot is tilted downwardly toward the stage, some heat from the lamp is trapped between the lamp and its reflector. The resultant temperature increase may shorten the lamp lifetime.
- Another object of the present invention is to provide a follow spot in which such heat entrapment does not occur, and in which natural draft venting takes place with downward tilting of the housing.
- the reflecting surface of the mirror 14 comprises a .[.section.]. .Iadd.segment .Iaddend.14' of .[.an ellipsoid of revolution.]. .Iadd.a revolved conic section .Iaddend.36 (FIGS. 4 and 5) .Iadd.having a near focus and a far focus on the same side and .Iaddend.which is generated by revolving .Iadd.the conic section in this instance .Iaddend.an ellipse 36' (FIG. 3) about an axis of revolution 37 corresponding to the ellipse major axis 37'.
- the mirror .[.section.].
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Projection Apparatus (AREA)
Abstract
Description
______________________________________ θ = 19° mirror diameter = 12 inches U = 19 inches magnification = 48 a = 38.3 feet e = 36.7 feet b = 10.8 feet ε = 0.96 ______________________________________
Claims (16)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/741,070 USRE30119E (en) | 1974-04-25 | 1976-11-11 | Compact follow spot |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US464133A US3900726A (en) | 1974-04-25 | 1974-04-25 | Compact follow spot |
US05/741,070 USRE30119E (en) | 1974-04-25 | 1976-11-11 | Compact follow spot |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US464133A Reissue US3900726A (en) | 1974-04-25 | 1974-04-25 | Compact follow spot |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE30119E true USRE30119E (en) | 1979-10-16 |
Family
ID=23842705
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US464133A Expired - Lifetime US3900726A (en) | 1974-04-25 | 1974-04-25 | Compact follow spot |
US05/741,070 Expired - Lifetime USRE30119E (en) | 1974-04-25 | 1976-11-11 | Compact follow spot |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US464133A Expired - Lifetime US3900726A (en) | 1974-04-25 | 1974-04-25 | Compact follow spot |
Country Status (4)
Country | Link |
---|---|
US (2) | US3900726A (en) |
JP (1) | JPS5442551B2 (en) |
DE (1) | DE2518539C3 (en) |
GB (1) | GB1488608A (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1476297A (en) * | 1973-09-29 | 1977-06-10 | Lucas Electrical Ltd | Motor vehicle lamp assemblies |
US4600976A (en) * | 1985-02-25 | 1986-07-15 | Michael Callahan | Color changer mechanism |
FR2582779A1 (en) * | 1985-05-29 | 1986-12-05 | Perrin Louis | Light effect generator |
US4799210A (en) * | 1986-11-05 | 1989-01-17 | Unisys Corporation | Fiber optic read/write head for an optical disk memory system |
US4897771A (en) * | 1987-11-24 | 1990-01-30 | Lumitex, Inc. | Reflector and light system |
GB2239938B (en) * | 1990-01-15 | 1993-06-16 | Pearce Harvey Peter Roger | Variable colour spotlight |
DE4204673A1 (en) * | 1992-02-17 | 1993-08-19 | Abb Patent Gmbh | Flameproof battery operated hand-lamp with auxiliary light source - has auxiliary lamp behind small aperture in main reflector and ellipsoidal reflector for projecting conical auxiliary beam |
DE19840475A1 (en) * | 1998-09-04 | 2000-03-30 | Armin Hopp | Lighting equipment |
US6814469B2 (en) * | 2000-06-19 | 2004-11-09 | Cooper Industries, Inc. | Rotating reflector |
US7796487B2 (en) * | 2005-05-10 | 2010-09-14 | Seagate Technology Llc | Optical system for data storage devices |
US20180292069A1 (en) | 2017-04-05 | 2018-10-11 | Michael Callahan | Lighting Equipment |
GB2590806B (en) * | 2020-12-17 | 2022-03-30 | Watt Graeme | Optical assembly for a downlight |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1694485A (en) * | 1926-01-28 | 1928-12-11 | Newland Kelly | Vehicle head lamp |
US2950382A (en) * | 1956-12-17 | 1960-08-23 | Strong Electric Corp | Projection lamp |
US3038372A (en) * | 1958-03-21 | 1962-06-12 | Bell & Howell Co | Lantern slide illuminating system |
US3578965A (en) * | 1969-09-26 | 1971-05-18 | Berkey Colortran Mfg Inc | Foldable luminaire |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB399121A (en) * | 1932-05-13 | 1933-09-28 | Louis Rivier | Lighting device |
US2755374A (en) * | 1952-03-13 | 1956-07-17 | Ott Walter | Reflecting system |
JPS4414555Y1 (en) * | 1965-12-24 | 1969-06-20 | ||
JPS476072U (en) * | 1971-02-13 | 1972-09-20 |
-
1974
- 1974-04-25 US US464133A patent/US3900726A/en not_active Expired - Lifetime
-
1975
- 1975-02-28 GB GB8452/75A patent/GB1488608A/en not_active Expired
- 1975-03-20 JP JP3422675A patent/JPS5442551B2/ja not_active Expired
- 1975-04-25 DE DE2518539A patent/DE2518539C3/en not_active Expired
-
1976
- 1976-11-11 US US05/741,070 patent/USRE30119E/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1694485A (en) * | 1926-01-28 | 1928-12-11 | Newland Kelly | Vehicle head lamp |
US2950382A (en) * | 1956-12-17 | 1960-08-23 | Strong Electric Corp | Projection lamp |
US3038372A (en) * | 1958-03-21 | 1962-06-12 | Bell & Howell Co | Lantern slide illuminating system |
US3578965A (en) * | 1969-09-26 | 1971-05-18 | Berkey Colortran Mfg Inc | Foldable luminaire |
Also Published As
Publication number | Publication date |
---|---|
DE2518539B2 (en) | 1980-10-02 |
JPS50139586A (en) | 1975-11-07 |
DE2518539A1 (en) | 1975-11-13 |
JPS5442551B2 (en) | 1979-12-14 |
GB1488608A (en) | 1977-10-12 |
DE2518539C3 (en) | 1981-08-27 |
US3900726A (en) | 1975-08-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: COLORTRAN, INC. Free format text: ASSIGN NUNC PRO TUNC AS OF SEPT. 30, 1981 THE ENTIRE INTEREST SAID ASSIGNEE;ASSIGNOR:BEKEY COLOTRAN, INC.,;REEL/FRAME:004003/0568 Effective date: 19820622 |
|
AS | Assignment |
Owner name: CITICORP INDUSTRIAL CREDIT, INC. Free format text: SECURITY INTEREST;ASSIGNOR:LEE COLORTRAN, INC.;REEL/FRAME:004776/0507 Effective date: 19871013 |
|
AS | Assignment |
Owner name: LEE COLORTRAN, INC. Free format text: CHANGE OF NAME;ASSIGNOR:COLORTRAN, INC.;REEL/FRAME:004813/0006 Effective date: 19871028 |
|
AS | Assignment |
Owner name: COLORTRAN, INC., A CORP. OF CA. Free format text: SECURITY INTEREST;ASSIGNOR:LEE COLORTRAN, INC.,;REEL/FRAME:004869/0519 Effective date: 19880217 |
|
AS | Assignment |
Owner name: COLORTRAN, INC. Free format text: CHANGE OF NAME;ASSIGNOR:LEE COLORTRAN, INC., A CORP. OF DELAWARE;REEL/FRAME:005566/0405 Effective date: 19900930 |
|
AS | Assignment |
Owner name: NSI CORPORATION, AN OREGON CORPORATION, OREGON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COLORTRAN, INC. (FKA BERKEY COLORTRAN, INC.) A CORP. OF DE;REEL/FRAME:007986/0129 Effective date: 19960529 |