US1740957A - Cover for reflectors - Google Patents

Cover for reflectors Download PDF

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Publication number
US1740957A
US1740957A US258195A US25819528A US1740957A US 1740957 A US1740957 A US 1740957A US 258195 A US258195 A US 258195A US 25819528 A US25819528 A US 25819528A US 1740957 A US1740957 A US 1740957A
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United States
Prior art keywords
band
lever
cover
spring
shade
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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
Application number
US258195A
Inventor
Paul D Phillips
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Benjamin Electric Manufacturing Co
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BENJAMIN ELECTRIC Manufacturing CO
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Priority to US258195A priority Critical patent/US1740957A/en
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Publication of US1740957A publication Critical patent/US1740957A/en
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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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • 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
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/20—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by toggle-action levers
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/21—Strap tighteners
    • Y10T24/2143—Strap-attached folding lever
    • Y10T24/2153—Split ring fasteners
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/21—Strap tighteners
    • Y10T24/2189—Circular flange container clamp
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/0886—Sliding and swinging
    • Y10T292/0887—Operating means
    • Y10T292/089—Lever
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/20—Clamps
    • Y10T292/205—Ring
    • Y10T292/212—With expanding or contracting means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/20—Clamps
    • Y10T292/205—Ring
    • Y10T292/212—With expanding or contracting means
    • Y10T292/216—Toggle lever

Definitions

  • My invention relates to covers for refiectors.
  • a glass cover be secured across the opening in a reflector in order to keep dust and other foreign material away from the parts within the reflector.
  • One of the objects of my invention is to provide improved means whereby the glass cover may be readily attached and detached with respect to the reflector.
  • Figure l is a perspective View showing my improved means for holding the glass cover on the reflector;
  • Fig. 2 is a bottom view of the tightening device for the retaining band showing the band in contracted position;
  • Fig. 3 is a view similar to Fig. 2 showing the band in expanded position; and Fig. 4 is a section on the line H of Fig. 1.
  • Reflectors of the type contemplated in this invention are often secured adjacent the ceiling of a room so that the removal and replacement of the glass cover has to be done' while standing on a ladder, which makes it desirable that this operation be as simple as possible.
  • clamping band 1 which embraces the adjacent edges of the glass cover 2 and reflector 3 and which can be readily contracted and expanded and which will remain on the glass cover when the glass cover is removed from the reflector.
  • the construction shown therein comprises a refleet-or 3, a glass cover 2 therefor, an expansihir and contractible band 1 embracing adedges of the cover and reflector and means for holding the band either in contracted or expanded position.
  • the band is of channel form in cross-section as shown in Fig. 4 and embraces the lower beaded edge 4 of the reflector and theehannel felt cushioning ring 5 which receives the edge of the glass cover.
  • This guide strip is formed to provide an outwardly extending abutment 11 against which one end of the spring bears.
  • the link 8 connecting the lever with the spring may be formed of wire bent to provide a loop portion 12 surrounding the guide 10 and having its ends pivotally connected with the lever at 9.
  • This lever may be in the form of a sheet metal stamping curved so as to conform to the contour of the clamping band 1 when the band is in contracted position, as shown in Fig. 1, whereby smooth constructlon is obtained.
  • the lever may have a hole 13 stamped therein through which a looped securing strap 14 is inserted to provide a pivotal mounting for the lever, this loop being riveted to one end of the clamping band.
  • the end 15 of the guide strap 10 is so shaped and positioned as to cooperate with the end 16 of the lever to act as a sort of frictional latch to hold this lever in the position shown in Fig. 3, thus holding the clamping band in expanded position.
  • This lever acts to hold the ends of the band far enough apart so that the attendant can take hold of the complete cover at a point diametrically opposite the glass with one hand and with the other hand over the glass can pull the holder oil without any danger of dropping it.
  • the construction is such that the clamping band remains in position on the edge of the glass cover when the cover and band are removed from the reflector so that the band and glass cover remain assembled with respect to eachother when removed. from the reflector. This greatly facilitates the removal and replacement of the cover with respect to the reflector.
  • Means for securing a cover to a shade comprising an expansible and contractible band of still construction embracing adjacent edges of the coverand shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, and having both ends secured to said stifi' band, a coil compression spring surrounding said guide, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position.
  • Means for securing a cover to a shade comprising an expansible and contractible band of stiff construction embracing adj acent' edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, and having both ends secured to said still band, a coil compression spring surrounding said guidc, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, said guide being in the form of a strip secured to said band and having an abutment portion against which one end of said spring bears.
  • Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, a coil compression 4 spring surrounding said guide, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, said link being formed of wire and having a loop portion surrounding said guide and bearing on said spring said link having its ends pivotally connected with said lever.
  • Means for securin a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a spring mounted on the other end of said band, and a link pivotally connected with said lever and conuectingsaid lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, and means for holding said band in expanded position when the lever is. moved to expand the band.
  • Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a spring mounted on the other end of said band, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, and means for holding said band in expanded position when the lever is moved to expand the band comprising an abutment engaged by said lever.
  • Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, a
  • Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, a coil compression spring surrounding said guide, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to a swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, and means for holding said band in expanded position when the lever is moved to expand the band comprising an abutment engaged by said lever.
  • Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, a coil compression spring surrounding said guide, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, and means for holding said band in expanded position when the lever is moved to expand the band, comprising an abutment engaged by said lever, said guide and abutment being formed as parts of an integral strip.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Blinds (AREA)

Description

Dec. 24, 1929. -P. D. PHILLIPS 1,740,957
COVER FOR REFLECTQRS Filed March 1, 1928 Patented Dec. 24, 1929 UNITED STATES PATENT OFFICE PAUL D. PHILLIPS, OF CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN ELECTRIC MANU- FACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS COVER FOR REFLECTORS Application filed March 1,
My invention relates to covers for refiectors.
In certain situations it is desirable that a glass cover be secured across the opening in a reflector in order to keep dust and other foreign material away from the parts within the reflector.
One of the objects of my invention is to provide improved means whereby the glass cover may be readily attached and detached with respect to the reflector.
Further objects will appear from the description and claims.
In the drawings in which an embodiment 5 of my invention is shown, Figure l is a perspective View showing my improved means for holding the glass cover on the reflector; Fig. 2 is a bottom view of the tightening device for the retaining band showing the band in contracted position;
Fig. 3 is a view similar to Fig. 2 showing the band in expanded position; and Fig. 4 is a section on the line H of Fig. 1. Reflectors of the type contemplated in this invention are often secured adjacent the ceiling of a room so that the removal and replacement of the glass cover has to be done' while standing on a ladder, which makes it desirable that this operation be as simple as possible.
. In my construction this is accomplished by providing a clamping band 1 which embraces the adjacent edges of the glass cover 2 and reflector 3 and which can be readily contracted and expanded and which will remain on the glass cover when the glass cover is removed from the reflector.
. Referring to the drawings in detail, the construction shown therein comprises a refleet-or 3, a glass cover 2 therefor, an expansihir and contractible band 1 embracing adedges of the cover and reflector and means for holding the band either in contracted or expanded position. The band is of channel form in cross-section as shown in Fig. 4 and embraces the lower beaded edge 4 of the reflector and theehannel felt cushioning ring 5 which receives the edge of the glass cover.
50 The means for holding the band in either 1928. Serial No. 258,195.
rounds a guide 10 in the form of a sheet metal stamping riveted at both ends to the clamping band 1. This guide strip is formed to provide an outwardly extending abutment 11 against which one end of the spring bears.
The link 8 connecting the lever with the spring may be formed of wire bent to provide a loop portion 12 surrounding the guide 10 and having its ends pivotally connected with the lever at 9. This lever may be in the form of a sheet metal stamping curved so as to conform to the contour of the clamping band 1 when the band is in contracted position, as shown in Fig. 1, whereby smooth constructlon is obtained. The lever may have a hole 13 stamped therein through which a looped securing strap 14 is inserted to provide a pivotal mounting for the lever, this loop being riveted to one end of the clamping band. In order to hold the clamping band in expanded position as shown in F 3 the end 15 of the guide strap 10 is so shaped and positioned as to cooperate with the end 16 of the lever to act as a sort of frictional latch to hold this lever in the position shown in Fig. 3, thus holding the clamping band in expanded position. This lever acts to hold the ends of the band far enough apart so that the attendant can take hold of the complete cover at a point diametrically opposite the glass with one hand and with the other hand over the glass can pull the holder oil without any danger of dropping it. If it were necessary for the attendant to spring the ends of the band apart while standing on the ladder, both hands would he required to do this and as some of those covers are ({uitc large, perhaps 18 in diameter, there wou d be great danger of the cover coming loose quickly and, because of its weight,
twisting itself out of the hands of the attendant. The construction is such that the clamping band remains in position on the edge of the glass cover when the cover and band are removed from the reflector so that the band and glass cover remain assembled with respect to eachother when removed. from the reflector. This greatly facilitates the removal and replacement of the cover with respect to the reflector.
While I have described but one embodiment of my invention, it is obvious that many modifications therein may occur to those skilled in the art, and I desire, therefore, that my invention be limited only by the scope of the appended claims and by the prior art.
I claim:
1. Means for securing a cover to a shade comprising an expansible and contractible band of still construction embracing adjacent edges of the coverand shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, and having both ends secured to said stifi' band, a coil compression spring surrounding said guide, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position.
2. Means for securing a cover to a shade comprising an expansible and contractible band of stiff construction embracing adj acent' edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, and having both ends secured to said still band, a coil compression spring surrounding said guidc, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, said guide being in the form of a strip secured to said band and having an abutment portion against which one end of said spring bears.
3. Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, a coil compression 4 spring surrounding said guide, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, said link being formed of wire and having a loop portion surrounding said guide and bearing on said spring said link having its ends pivotally connected with said lever.
4. Means for securin a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a spring mounted on the other end of said band, and a link pivotally connected with said lever and conuectingsaid lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, and means for holding said band in expanded position when the lever is. moved to expand the band.
5. Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a spring mounted on the other end of said band, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, and means for holding said band in expanded position when the lever is moved to expand the band comprising an abutment engaged by said lever.
6. Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, a
guide, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, and means for holding said band-in expanded position when the lever is moved to expand the band.
7. Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, a coil compression spring surrounding said guide, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to a swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, and means for holding said band in expanded position when the lever is moved to expand the band comprising an abutment engaged by said lever.
8. Means for securing a cover to a shade comprising an expansible and contractible band embracing adjacent edges of the cover and shade, and means for contracting said band about said edges comprising a lever pivotally mounted on one end of said band, a guide mounted on the other end of said band and extending circumferentially thereof, a coil compression spring surrounding said guide, and a link pivotally connected with said lever and connecting said lever with said spring, said lever being movable to swing the pivotal link connection past the dead-center whereby the spring will hold the band in contracted position, and means for holding said band in expanded position when the lever is moved to expand the band, comprising an abutment engaged by said lever, said guide and abutment being formed as parts of an integral strip.
In witness whereof, I have hereunto subscribed my name.
PAUL D. PHILLIPS.
US258195A 1928-03-01 1928-03-01 Cover for reflectors Expired - Lifetime US1740957A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418291A (en) * 1945-03-27 1947-04-01 Dacey Michael James Protector for garbage cans and the like
US2453492A (en) * 1945-03-29 1948-11-09 Robert V Warga Barrel closing ring
US2515629A (en) * 1945-02-09 1950-07-18 Garlock Packing Co Garter spring
US2522397A (en) * 1947-06-18 1950-09-12 Helen A Palmer Baking utensil
US2543300A (en) * 1947-08-15 1951-02-27 Ptak Steve Basket cover
DE763229C (en) * 1938-05-24 1951-08-06 Westfaelische Metall Ind A G L Device for attaching the cover of electric lights especially intended for vehicles on the light housing
US2942127A (en) * 1957-10-02 1960-06-21 Gen Electric Mounting means for a deflection yoke assembly
US3251988A (en) * 1963-12-03 1966-05-17 Mc Graw Edison Co Luminaire
US3964774A (en) * 1975-03-14 1976-06-22 Ireco Industries, Inc. Irrigation line coupler
US4817596A (en) * 1982-09-03 1989-04-04 Gallet S.A. Helmet for use with respirator mask
US6760985B2 (en) 2002-09-03 2004-07-13 David A. Wilson Craft hoop clamping method and apparatus
BE1022266B1 (en) * 2015-04-02 2016-03-07 Schreder IMPROVEMENTS IN OR RELATING TO MODULAR LUMINAIRE ASSEMBLIES
US9976734B2 (en) 2015-04-02 2018-05-22 Schreder Modular luminaire assemblies

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763229C (en) * 1938-05-24 1951-08-06 Westfaelische Metall Ind A G L Device for attaching the cover of electric lights especially intended for vehicles on the light housing
US2515629A (en) * 1945-02-09 1950-07-18 Garlock Packing Co Garter spring
US2418291A (en) * 1945-03-27 1947-04-01 Dacey Michael James Protector for garbage cans and the like
US2453492A (en) * 1945-03-29 1948-11-09 Robert V Warga Barrel closing ring
US2522397A (en) * 1947-06-18 1950-09-12 Helen A Palmer Baking utensil
US2543300A (en) * 1947-08-15 1951-02-27 Ptak Steve Basket cover
US2942127A (en) * 1957-10-02 1960-06-21 Gen Electric Mounting means for a deflection yoke assembly
US3251988A (en) * 1963-12-03 1966-05-17 Mc Graw Edison Co Luminaire
US3964774A (en) * 1975-03-14 1976-06-22 Ireco Industries, Inc. Irrigation line coupler
US4817596A (en) * 1982-09-03 1989-04-04 Gallet S.A. Helmet for use with respirator mask
US6760985B2 (en) 2002-09-03 2004-07-13 David A. Wilson Craft hoop clamping method and apparatus
BE1022266B1 (en) * 2015-04-02 2016-03-07 Schreder IMPROVEMENTS IN OR RELATING TO MODULAR LUMINAIRE ASSEMBLIES
US9976734B2 (en) 2015-04-02 2018-05-22 Schreder Modular luminaire assemblies
US10429047B2 (en) 2015-04-02 2019-10-01 Schreder Modular luminaire assemblies
US11118774B2 (en) 2015-04-02 2021-09-14 Schreder Modular luminaire assemblies

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