US3833803A - Parabolic spotlight fixture having rotatable lamp holder - Google Patents

Parabolic spotlight fixture having rotatable lamp holder Download PDF

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Publication number
US3833803A
US3833803A US00360350A US36035073A US3833803A US 3833803 A US3833803 A US 3833803A US 00360350 A US00360350 A US 00360350A US 36035073 A US36035073 A US 36035073A US 3833803 A US3833803 A US 3833803A
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lamp
reflector
holder
main
lamp holder
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Expired - Lifetime
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US00360350A
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R Heritage
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Rotaflex Ltd
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Rotaflex Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages

Definitions

  • Int. Cl. F2lv 19/02 has a laterally extending lamp-holder, an auxiliary re- [58] Field of Search 240/41.37, 41.15, 41.1, flector in front of the lamp position, to conceal the 240/41.6, 44.2, 44 R, 44.1, 46.01, 52 R, 73 R lamp filament and to reflect forwardly projected light rays, and the lamp holder is rotatable to permit focus- [56] References Cited ing of the lamp filament relative to the reflectors.
  • the present invention relates to an improved spotlight construction, in which standard service lamps can be employed.
  • the invention provides a spotlight fitting comprising a main parabolic reflector, a lampholder whose axis extends transversely of the reflector to position a lamp in front of the reflector, an auxiliary reflector mounted on the front of the fitting to conceal the lamp filament and having a concave rear reflector surface for reflecting forwardly projecting light rays back on to the parabolic reflector, and means for rotating the lamp-holder about its own axis.
  • the rotary mounting of the lamp-holder makes it possible to adjust the orientation of the lamp filament, relative to the reflectors, and thereby obtain an optimum lighting effect from a standard service lamp.
  • FIG. 1 is a front elevation of the spotlight
  • FIG. 2 is a cross-sectional elevation.
  • the spotlight comprises a parabolic reflector l (preferably die-cast), one radially extending peripheral portion 2 of which is recessed or offset to receive a lampholder 3.
  • a cover member 4 is secured to the body of the reflector by fixing screws 6, to form with the reflector portion 2 a generally cylindrical housing for the lampholder, which is retained in the housing by means of a mounting bracket 7 secured to the base of the lamp holder and which bracket is secured to the cover member 4 by a thumb-screw 8.
  • This screw is engaged in a threaded hole in the bracket and extends outwardly through a circumferentially extended slot 9 in the cover member 4, thus permitting rotation of the bracket and lampholder about the axis 10 of the lampholder, relative to reflector 1.
  • This adjustability permits focussing of a lamp filament by varying its orientation relative to the reflector 1.
  • a cable entry gland assembly 11 extends through transverse end walls 1 and 4 of the reflector and cover member and also provides a pivotal attachment for a mounting bracket B.
  • auxiliary reflector 12 (conveniently formed as a diecasting), the main reflecting surface 13 of which is concave, generally part-spherical form so as to conform closely to the globe of a standard service lamp shown in phantom line at L.
  • the auxiliary reflector thus serves in use to reflect any forwardly directed light rays rearwardly onto the parabolic reflector.
  • This function is, of course, normally carried out by the part silvering on special purpose lamps normally required for parabolic reflector spotlights.
  • the spotlight of the present invention is adapted for use with standard service lamps, which are much cheaper than part silvered spotlight lamps.
  • auxiliary reflector The releasable attachment of the auxiliary reflector is conveniently, effected in this embodiment with the aid of a thumbscrew l4, threadedly engaged in a radially extending tongue 15 of the auxiliary reflector which is engaged in a corresponding slot 16 in the cover member 4.
  • the auxiliary reflector is simply secured by tightening the screw 14 to engage against the cover member adjacent the end of slot 16.
  • the auxiliary reflector is thus readily released to facilitate insertion and removal of lamps L and resecured in its proper position relative to the parabolic reflector 1.
  • a spotlight fitting for use with a standard unsilvered service lamp comprising a main parabolic reflector, lamp holder means having its axis extending in a direction transversely of the reflector for positioning a lamp supported in said holder means in front of said main reflector, auxiliary reflector means having a concave rear reflector surface, said auxiliary reflector means being mounted on said fitting and disposed forwardly of said holder for concealing the filament of a lamp positioned in said holder and reflecting forwardly projected light rays back into the main reflector, and adjustment means interposed between said main reflector and said lamp holder supporting said lamp holder for rotation about its own axis relative to said main reflector to enable variation of the orientation of the filament of a lamp in said holder relative to said main reflector.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

A spotlight fitting for use with standard service lamps has a laterally extending lamp-holder, an auxiliary reflector in front of the lamp position, to conceal the lamp filament and to reflect forwardly projected light rays, and the lamp holder is rotatable to permit focusing of the lamp filament relative to the reflectors.

Description

United States Patent Heritage Sept. 3, 1974 [54] PARABOLIC SPOTLIGHT FIXTURE 1,895,906 l/1933 Arbuckle 240/416 HAVING ROTATABLE LAMP HOLDER 1,927,285 9/1933 Hurrell et al. 240/46.55 2,014,076 9/1935 Wellman 240/44.2 [75] Inventor: R ert H r ag M a ng 2,977,461 3/1961 Jones 240 442 3,012,798 12/1961 Berger 240/52 R [73] Assgnee' Rmaflex (Great 3,157,088 11/1964 Zillmer 240/44.2
London, England [22] Filed: May 14, 1973 Primary Exa'minerRichard L. Moses [21] Appl' 360350 Attorney, Agent, or FirmArthur B. Colvin [30] Foreign Application Priority Data May 22, 1972 Great Britain 23943/72 [57] ABSTRACT [52] US. Cl 240/44.2, 240/41.1, 240/44 R,
240/46.01 A spotlight fitting for use with standard service lamps [51] Int. Cl. F2lv 19/02 has a laterally extending lamp-holder, an auxiliary re- [58] Field of Search 240/41.37, 41.15, 41.1, flector in front of the lamp position, to conceal the 240/41.6, 44.2, 44 R, 44.1, 46.01, 52 R, 73 R lamp filament and to reflect forwardly projected light rays, and the lamp holder is rotatable to permit focus- [56] References Cited ing of the lamp filament relative to the reflectors.
UNITED STATES PATENTS 1,575,327 3/1926 Garford et a1. 240/46.55 X 1 Claim, 2 Drawing Figures PARABOLIC SPOTLIGHT FIXTURE HAVING ROTATABLE LAMP HOLDER Spotlights employing parabolic reflectors and in which a lamp is positioned in front of the reflector, require part silvered lamps, which are expensive items.
The present invention relates to an improved spotlight construction, in which standard service lamps can be employed.
More specifically, the invention provides a spotlight fitting comprising a main parabolic reflector, a lampholder whose axis extends transversely of the reflector to position a lamp in front of the reflector, an auxiliary reflector mounted on the front of the fitting to conceal the lamp filament and having a concave rear reflector surface for reflecting forwardly projecting light rays back on to the parabolic reflector, and means for rotating the lamp-holder about its own axis. The rotary mounting of the lamp-holder makes it possible to adjust the orientation of the lamp filament, relative to the reflectors, and thereby obtain an optimum lighting effect from a standard service lamp.
One form of spotlight in accordance with the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a front elevation of the spotlight;
FIG. 2 is a cross-sectional elevation.
The spotlight comprises a parabolic reflector l (preferably die-cast), one radially extending peripheral portion 2 of which is recessed or offset to receive a lampholder 3. A cover member 4 is secured to the body of the reflector by fixing screws 6, to form with the reflector portion 2 a generally cylindrical housing for the lampholder, which is retained in the housing by means of a mounting bracket 7 secured to the base of the lamp holder and which bracket is secured to the cover member 4 by a thumb-screw 8. This screw is engaged in a threaded hole in the bracket and extends outwardly through a circumferentially extended slot 9 in the cover member 4, thus permitting rotation of the bracket and lampholder about the axis 10 of the lampholder, relative to reflector 1. This adjustability permits focussing of a lamp filament by varying its orientation relative to the reflector 1.
A cable entry gland assembly 11 extends through transverse end walls 1 and 4 of the reflector and cover member and also provides a pivotal attachment for a mounting bracket B.
Removably secured to the cover member 4 is an auxiliary reflector 12 (conveniently formed as a diecasting), the main reflecting surface 13 of which is concave, generally part-spherical form so as to conform closely to the globe of a standard service lamp shown in phantom line at L. The auxiliary reflector thus serves in use to reflect any forwardly directed light rays rearwardly onto the parabolic reflector. This function is, of course, normally carried out by the part silvering on special purpose lamps normally required for parabolic reflector spotlights. Thus the spotlight of the present invention is adapted for use with standard service lamps, which are much cheaper than part silvered spotlight lamps.
The releasable attachment of the auxiliary reflector is conveniently, effected in this embodiment with the aid of a thumbscrew l4, threadedly engaged in a radially extending tongue 15 of the auxiliary reflector which is engaged in a corresponding slot 16 in the cover member 4. The auxiliary reflector is simply secured by tightening the screw 14 to engage against the cover member adjacent the end of slot 16.
The auxiliary reflector is thus readily released to facilitate insertion and removal of lamps L and resecured in its proper position relative to the parabolic reflector 1.
I claim:
1. A spotlight fitting for use with a standard unsilvered service lamp comprising a main parabolic reflector, lamp holder means having its axis extending in a direction transversely of the reflector for positioning a lamp supported in said holder means in front of said main reflector, auxiliary reflector means having a concave rear reflector surface, said auxiliary reflector means being mounted on said fitting and disposed forwardly of said holder for concealing the filament of a lamp positioned in said holder and reflecting forwardly projected light rays back into the main reflector, and adjustment means interposed between said main reflector and said lamp holder supporting said lamp holder for rotation about its own axis relative to said main reflector to enable variation of the orientation of the filament of a lamp in said holder relative to said main reflector.

Claims (1)

1. A spotlight fitting for use with a standard unsilvered service lamp comprising a main parabolic reflector, lamp holder means having its axis extending in a direction transversely of the reflector for positioning a lamp supported in said holder means in front of said main reflector, auxiliary reflector means having a concave rear reflector surface, said auxiliary reflector means being mounted on said fitting and disposed forwardly of said holder for concealing the filament of a lamp positioned in said holder and reflecting forwardly projected light rays back into the main reflector, and adjustment means interposed between said main reflector and said lamp holder supporting said lamp holder for rotation about its own axis relative to said main reflector to enable variation of the orientation of the filament of a lamp in said holder relative to said main reflector.
US00360350A 1972-05-22 1973-05-14 Parabolic spotlight fixture having rotatable lamp holder Expired - Lifetime US3833803A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2394372A GB1424360A (en) 1972-05-22 1972-05-22 Spotlieghts

Publications (1)

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US3833803A true US3833803A (en) 1974-09-03

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US (1) US3833803A (en)
JP (1) JPS4942177A (en)
AU (1) AU5590273A (en)
BE (1) BE799777A (en)
BR (1) BR7303758D0 (en)
CA (1) CA975337A (en)
DE (1) DE2325702A1 (en)
ES (1) ES414988A1 (en)
FR (1) FR2185771B3 (en)
GB (1) GB1424360A (en)
IN (1) IN137676B (en)
IT (1) IT986341B (en)
NL (1) NL7306707A (en)
ZA (1) ZA733381B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8903699U1 (en) * 1989-03-23 1989-05-18 Siemens AG, 1000 Berlin und 8000 München Spotlights
US20030111590A1 (en) * 1999-05-07 2003-06-19 Mattison Philip E. Image differencing for analog photocell array
US20070274081A1 (en) * 2003-12-23 2007-11-29 Engel Hartmut S Recessed Lighting Fixture
US20100085760A1 (en) * 2008-10-08 2010-04-08 Han-Chung Hsu Illuminant device and light reflecting shade thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU589124B2 (en) * 1984-05-03 1989-10-05 Watco Pty. Ltd. Light system
USD377226S (en) 1996-01-11 1997-01-07 Wei-Hong Shen Clamp-on lighting fixture

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1575327A (en) * 1924-05-02 1926-03-02 Garford Francis Sydney Headlight
US1895906A (en) * 1927-05-07 1933-01-31 Monogram Lens Corp Beam adjusting means
US1927285A (en) * 1932-02-04 1933-09-19 Albert C Hurrell Glare eliminator
US2014076A (en) * 1934-11-22 1935-09-10 Eastman Kodak Co Adjustable socket for interchangeable lamps in a projector
US2977461A (en) * 1957-05-31 1961-03-28 Jones Adjustable lamp socket for lighting fixture
US3012798A (en) * 1957-03-13 1961-12-12 Berger Kornel Universal electric swivel joint
US3157088A (en) * 1961-10-27 1964-11-17 Voigtlaender Ag Slide projector with combined lamp adjusting and ejecting means

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1575327A (en) * 1924-05-02 1926-03-02 Garford Francis Sydney Headlight
US1895906A (en) * 1927-05-07 1933-01-31 Monogram Lens Corp Beam adjusting means
US1927285A (en) * 1932-02-04 1933-09-19 Albert C Hurrell Glare eliminator
US2014076A (en) * 1934-11-22 1935-09-10 Eastman Kodak Co Adjustable socket for interchangeable lamps in a projector
US3012798A (en) * 1957-03-13 1961-12-12 Berger Kornel Universal electric swivel joint
US2977461A (en) * 1957-05-31 1961-03-28 Jones Adjustable lamp socket for lighting fixture
US3157088A (en) * 1961-10-27 1964-11-17 Voigtlaender Ag Slide projector with combined lamp adjusting and ejecting means

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8903699U1 (en) * 1989-03-23 1989-05-18 Siemens AG, 1000 Berlin und 8000 München Spotlights
US20030111590A1 (en) * 1999-05-07 2003-06-19 Mattison Philip E. Image differencing for analog photocell array
US6870150B2 (en) 1999-05-07 2005-03-22 Intel Corporation Image differencing for analog photocell array
US20070274081A1 (en) * 2003-12-23 2007-11-29 Engel Hartmut S Recessed Lighting Fixture
US7753550B2 (en) * 2003-12-23 2010-07-13 Hartmut S. Engel Recessed lighting fixture
US20100085760A1 (en) * 2008-10-08 2010-04-08 Han-Chung Hsu Illuminant device and light reflecting shade thereof

Also Published As

Publication number Publication date
FR2185771B3 (en) 1976-07-23
ZA733381B (en) 1974-05-29
DE2325702A1 (en) 1973-12-06
JPS4942177A (en) 1974-04-20
CA975337A (en) 1975-09-30
NL7306707A (en) 1973-11-26
ES414988A1 (en) 1976-02-16
IT986341B (en) 1975-01-30
BR7303758D0 (en) 1974-08-29
BE799777A (en) 1973-09-17
GB1424360A (en) 1976-02-11
FR2185771A1 (en) 1974-01-04
AU5590273A (en) 1974-11-21
IN137676B (en) 1975-09-06

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