US823622A - Composite shade for artificial lights. - Google Patents

Composite shade for artificial lights. Download PDF

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Publication number
US823622A
US823622A US30510306A US1906305103A US823622A US 823622 A US823622 A US 823622A US 30510306 A US30510306 A US 30510306A US 1906305103 A US1906305103 A US 1906305103A US 823622 A US823622 A US 823622A
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United States
Prior art keywords
shade
artificial lights
composite
light
prismatic
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Expired - Lifetime
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US30510306A
Inventor
Otis A Mygatt
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Individual
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Priority to US30510306A priority Critical patent/US823622A/en
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    • 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
    • F21V5/00—Refractors for light sources

Definitions

  • 's invention relates to composite shades for artificial lights. 1
  • the object of the invention is to lobe or shade whichs substantial y the efficiency of the I'ismatic shade as to light direction, but shall e of less weight and less subject to depreciation by dust.
  • Figure 1 is avertical central section of a shade involving the present invention.
  • Fig. 2 is a cross-section on line 2 2,.Fig. 1.
  • a part roduce a all have ordinar "of the common prismatic shade or globe is inert or useless and sometimes even obstructs and absorbs some of the light.
  • Theprisms may be omitted from this art of the shade or globe with a gain in li tness and sometimes with a gain in light" 'stribution.
  • Prism-glass has many advantages for many purposes, but in instances is objectionable on account of its weight and on accountof the; b t difiiculty ofremoving dust from the 'prisms.
  • My present invention reduces both these ob- In the glass shade or globe v the trade)
  • a the upper portion of the body has acter now well known in t s art and adaptedto" direct the light-rays which pass through rt of the shadein directions deter-' t s a mined by the lanei faces" of these prisms,
  • the interior oft e prismatic part of. the shade has vertical. ribs]; of a character which will i Specification of Letters Patent. Application filed March 9,1906. Serial No. 305.103.
  • Patented June is, 190
  • a tion (andin the exam 0 of the. shade is ma e thinand free from prisms.
  • This portion ofthe shade can be much thinner and lighter-than the ribbed body and being substantially smooth does not accumulate dust to anything like the extent that the prismat'cportion of the shade is likely to do.' Such dust as athers on the thin art can be readily wiped thin Po Is the lower portion) little divergence.
  • the thin part of the bodv y can be used as a support for decorative'designs without in any way interfering with the divide and diffuse the light-rays before they away.
  • the ody passes rays which reach it with light-distributing.qualities of the prismatic part of the shade.
  • the prismatic part of the shade will have thedesired form and prismatic construction to give the desired light distribution or direction.
  • the thin or smooth part of the shade will be adapted thereto as clrcumstances require.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)

Description

PATENTED JUNE 19, 1906.
No. 823,622. I I
v I I 0. MYGATT.
COMPOSITE SHADE FOR ARTIFICIAL LIGHTS.
APPLICATION FILED MAR. a, 1906.
prismatic jections'to a minimum.
' external circumferential risms a of a char-- 1 In tGStIIIIODYQWhBI'GOf I afiix'my signature T0 aZZ z uhom it may concern/.-
UN TED STATES OTIS'A. MYGATT, .OFINIEYW YORK, N. Y.
PATENT OFFICE.
COMPOSITE SHADE FOR ARTIFICIAL LIGHTS.
a specification, reference being had therein to the accompanying drawings.
's invention relates to composite shades for artificial lights. 1
The object of the invention is to lobe or shade whichs substantial y the efficiency of the I'ismatic shade as to light direction, but shall e of less weight and less subject to depreciation by dust. Figure 1 is avertical central section of a shade involving the present invention. Fig. 2 is a cross-section on line 2 2,.Fig. 1. For use with certain kinds of lights a part roduce a all have ordinar "of the common prismatic shade or globe is inert or useless and sometimes even obstructs and absorbs some of the light. Theprisms may be omitted from this art of the shade or globe with a gain in li tness and sometimes with a gain in light" 'stribution.
Prism-glass has many advantages for many purposes, but in instances is objectionable on account of its weight and on accountof the; b t difiiculty ofremoving dust from the 'prisms.
My present invention reduces both these ob- In the glass shade or globe v the trade) A the upper portion of the bodyhas acter now well known in t s art and adaptedto" direct the light-rays which pass through rt of the shadein directions deter-' t s a mined by the lanei faces" of these prisms, The interior oft e prismatic part of. the shade has vertical. ribs]; of a character which will i Specification of Letters Patent. Application filed March 9,1906. Serial No. 305.103.
Patented June is, 190
pass to the light-directing prisms. A tion (andin the exam 0 of the. shade is ma e thinand free from prisms. This portion ofthe shade can be much thinner and lighter-than the ribbed body and being substantially smooth does not accumulate dust to anything like the extent that the prismat'cportion of the shade is likely to do.' Such dust as athers on the thin art can be readily wiped thin Po Is the lower portion) little divergence. The thin part of the bodv y can be used as a support for decorative'designs without in any way interfering with the divide and diffuse the light-rays before they away. The ody passes rays which reach it with light-distributing.qualities of the prismatic part of the shade.
(so called 1 Itwill be understood. that the prismatic part of the shade will have thedesired form and prismatic construction to give the desired light distribution or direction. The thin or smooth part of the shade will be adapted thereto as clrcumstances require.
' The shade ispre'ssed in a mold, as usual with prismaticshades.
do not herein claim a shade made 'wifth decorate ,as such 18 claimed in 'myapplication, Serial No. 269,548, filed July 13,1905;
.one part rismatic and another part thin and transparent glass,
site the same, and a zone of thinner glass eow said prismatic portion.
1npresence.oftwo'witnessesL W. A. BARTLETT, f
BROWN.
US30510306A 1906-03-09 1906-03-09 Composite shade for artificial lights. Expired - Lifetime US823622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US30510306A US823622A (en) 1906-03-09 1906-03-09 Composite shade for artificial lights.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30510306A US823622A (en) 1906-03-09 1906-03-09 Composite shade for artificial lights.

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US823622A true US823622A (en) 1906-06-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384743A (en) * 1965-10-21 1968-05-21 Holophane Co Inc Desk lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384743A (en) * 1965-10-21 1968-05-21 Holophane Co Inc Desk lamp

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