US3871752A - Easily changeable filter holder - Google Patents

Easily changeable filter holder Download PDF

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Publication number
US3871752A
US3871752A US389521A US38952173A US3871752A US 3871752 A US3871752 A US 3871752A US 389521 A US389521 A US 389521A US 38952173 A US38952173 A US 38952173A US 3871752 A US3871752 A US 3871752A
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Prior art keywords
split ring
ring member
housing
secured
segment
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Expired - Lifetime
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US389521A
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Max Habinger
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HYGRO DYNAMICS IND Inc
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HYGRO DYNAMICS IND Inc
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/006—Filter holders
    • 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
    • F21V17/16—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 deformation of parts; Snap action mounting
    • F21V17/162—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 deformation of parts; Snap action mounting the parts being subjected to traction or compression, e.g. coil springs
    • 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.
    • Y10T24/44—Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44248—Encircling gripping member including semirigid band and means for adjusting girth

Definitions

  • ABSTRACT A combination which includes a housing for supporting a light source; support means remov- [52] US. Cl 350/318, 24/256, 350/25l ably Secured to Said housing for supporting a filter [51] [11L Cl.
  • This invention relates to lighting fixtures, and more particularly to a filter holder which can be easily removed from an associated light housing without the necessity of physically touching said housing.
  • the instant invention provides a simple arrangement for quickly and easily changing filters on a lamp enclosure without the necessity of touching such lamp enclosure.
  • a split ring-like member which supports a filter with respect to the lamp enclosure and which includes manually graspable release means for temporarily enlarging the ring-like member when it is desired to remove same from the lamp enclosure and change the filter carried thereby.
  • Another object of the instant invention is to provide such an arrangement which can be easily operated without the necessity of touching the lamp enclosure.
  • FIG. 1 is an exploded prospective view of the invention hereof.
  • FIG. 2 is a side view, partially in elevation and partially in prospective, further illustrating the invention hereof.
  • FIG. 3 is a side elevational view of the instant invention in its assembled condition.
  • FIG. I shows a typical light enclosure or housing 10, frequently known as a reflective bowl, within which is appropriately supported a light source (now shown).
  • the housing in generally cylindrical in nature and terminates in an outer annular portion 12 against which is urged the desired filter 14 in a manner to be further described.
  • the supporting arrangement for carrying the filter l4 and urging it against the outer extremity portion 12 of the enclosure 10 is broadly designated 16 and comprises a generally cylindrical split ring-like member 18 having first and second ends 20 and 22 which are normally biased toward one another to maintain the cylin drical shape illustrated.
  • This bias may be maintained by the natural resiliency of the material comprising the split ring-like member, typically metallic, and, as will be further described, may be supplemented by an expansible biasing spring 24.
  • the split ring-like member 18 includes an inturned annular flange 26 for supporting the filter 14. It will be appreciated that the rim 28 of the filter 14 will, in fact, be sandwiched between the aforenoted flange 26 and the extremity portion 12 of the enclosure 10 when the ring-like member 18 is removably secured to the enclosure 10 in the following manner.
  • the smallest diameter of the ring-like member 18 (when the first and second ends 20 and 22 thereof immediately confront one another) is slightly less than the diameter of the cylindrical end 30 of the enclosure 10.
  • the operator simply telescopes it on the cylindrical end 30 thereof and, in so doing. the slight difference in diameters therebetween forces the ring-like member 18 to slightly open, such that a small space 32 (Fig. 3) will now exist between the confronting end portions 20 and 22.
  • the manually graspable release means for temporarily enlarging the ring-like member I8 when it is desired to remove the ring-like member 18 and change the filter 14 comprises first and second generally L-shaped members 34 and 36, respectively.
  • the first member 34 includes a base portion having a first segment 38 secured on the first end 20 of the ring-like member 18 and a second intervally extending segment 40 which freely overlaps the second end 22 ofthe ring-like member 18.
  • An outwardly directed leg portion 42 extends from the end of the aforementioned second segment 40.
  • the second L-shaped member 36 includes a base portion having first segments 44 secured to the second end 22 of the ring-like member 18 and Because of the aforementioned relationship, it should i be appreciated that when one squeezes the leg portions 42 and 48 toward one another in the direction of the arrows shown in FIG. 2, the net result will be to urge the ends and 22 of the ring-like member 18 away from one another to thereby temporarily further enlarge the diameter of the ring-like member 18 whereby it can be easily slid off the cylindrical end 30 of the housing 10.
  • the filter 14 can be removed and replaced with the entire filterchanging operation requiring only the squeezing of the projections 42 and 48 toward one another and not requiring the operator to handle the housing 10.
  • the aforenoted expansible spring 24 is provided.
  • One end of the spring 50 is secured to the outstanding leg 48 and as best seen in FIG. 3, the other end 52 of the spring 24 is secured to the ring-like member 18 by being inserted in a preselected one of a plurality of apertures 54, 56 or 58 in accordance with the amount of tension desired for the spring 24. In this manner, the amount of frictional force developed on the cylinder portion 30 of the housing 10 can be easily varied.
  • support means removably secured to said housing for supporting a filter with respect to said housing, said support means comprising,
  • split ring member having first and second ends biased toward one another, whereby said split ring member frictionally engages said housing, said split ring member including an annular flange for supporting said filter, and said housing includes an outer extremity portion which urges said filter against said flange when said split ring member is frictionally engaged on said housing;
  • said manually graspable release means comprising first and second L-shaped members secured to said split ring member, said first L-shaped member including a base portion having one segment thereof secured to said first end of said split ring member and a second segment thereof freely overlapping said second end of said split ring member from said second segment; said second L-shaped' member including a base portion having one segment thereof secured to said second end of said split ring member and a second s'eggment thereof freely overlapping said first end of said split ring member and an outwardly directed leg portion extending from said second segment; whereby urging said outwardly directed leg portions toward one another will cause the separation of said first and second ends and enlargement of said split ring member; and
  • expansible biasing means one end of which is secured to one of said outwardly directed leg portions and the other end of which is secured to said split ring member for normally urging said first and second ends toward one another.
  • said split ring member includes a plurality of securing means for securing said other end of said expansible biasing means so that said expansible biasing means may be adjustably positioned with respect to said split ring member. whereby the force generated by said expansible biasing means may be varied.
  • support means removably secured to said housing for supporting a filter with respect to said housing, said support means comprising,
  • a split ring member having first and second ends biased toward one another, whereby said ring member frictionally engages said housing;
  • said manually graspable release means for temporarily enlarging said split ring member, whereby said split ring member can be easily removed from said housing
  • said manually graspable release means comprising first and second L-shaped members secured to said split ring member, said first L-shaped member including a base portion having one segment thereof secured to said first end of said split ring member and a second segment thereof freely overlapping said second end of said split ring member and an outwardly directed leg portion extending from said second segment; said second L-shaped member including a base portion having one segment thereof secured to said second end of said split ring member and a second segment thereof freely overlapping said first end of said split ring member and an outwardly directed leg portion extending from said second segment; whereby urging said outwardly directed leg portions toward one another will cause the separation of said first and second ends and enlargement of said split ring member; and
  • expansible biasing means one end of which is secured to one of said outwardly directed leg portions and the other end of which is secured to said split ring member for normally urging said first and second ends toward one another.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

A combination is disclosed which includes a housing for supporting a light source; support means removably secured to said housing for supporting a filter with respect to said housing, with said support means comprising a split ring-like member having first and second ends biased toward one another whereby said ring-like member frictionally engages said housing, and manually graspable release means for temporarily enlarging the aforenoted ring-like member whereby the ring-like member can be easily removed from such housing when it is desired to replace the filter supported thereby.

Description

3 1e-v5 0R 3,811,752
0 United States Patent 1191 1111 3,871,752
Habinger 1 Mar. 18, 1975 EASILY CHANGEABLE FILTER HOLDER Primary Examiner-Ronald J. Stern inventor. Max Hablnger, Landing. NJ. Assistant Examiner jon w. Henry [73] Assignee: Hygro Dynami s Industr s. In Attorney, Agent, or FirmLerner, David, Littenberg Landing, NJ. & Samuel [22] Filed: Aug. 20, 1973 [21] Appl. No.: 389,521 [57] ABSTRACT A combination is disclosed which includes a housing for supporting a light source; support means remov- [52] US. Cl 350/318, 24/256, 350/25l ably Secured to Said housing for supporting a filter [51] [11L Cl. G02) 7/00 with respect to Said housing with Said pp means Fleld of Search 350/311-1519, Comprising a Split ring like member having first and 350/245 g 240/151 second ends biased toward one another whereby said 285/365 407 ring-like member frictionally engages said housing, and manually graspable release means for temporarily [56] References C'ted enlarging the 'aforenoted ring-like member whereby UNITED STATES PATENTS the ring-like member can be easily removed from such 1,754.282 4/1930 Owens 350/315 housing when it is desired to replace the filter sup- 1,775.l 9/1930 Worsching..... ported thereby. 2.090.086 8/1937 Weiner 240/106 SD 2874.430 2/1959 Coldren 24/256 6 Clam, 3 Drawing Flgures EASILY CIIANGEABLE FILTER HOLDER FIELD OF THE INVENTION This invention relates to lighting fixtures, and more particularly to a filter holder which can be easily removed from an associated light housing without the necessity of physically touching said housing.
BACKGROUND OF THE INVENTION In the photographic profession, it is, or course, well known that high-intensity lamps are frequently used to facilitate the taking of pictures. It is equally as well known that a variety of filters are employed in connection with such lamps and that such filters must be frequently interchanged to obtain particular results. Accordingly, those in the industry have devised various arrangements for supporting a filter with respect to a lamp enclosure in such a manner that the filter may be removed and changed at will. Typical prior art arrangements are representatively shown in US. Pat. Nos. 2,616,030; 2,621 ,283; 2,785,291; 2,878,374; and 2,943,187. Such prior art structures, however, suffer from various drawbacks, including the difficulty of manipulation, complexity of mechanism, and high cost of manufacture.
Additionally, it will be appreciated that an enclosure such as a reflective bowl for a high-intensity lamp becomes very hot when the lamp is being used. This problem further complicates the problem of moving and changing filters associated therewith since it is virtually impossible and extremely dangerous to touch the lamp enclosure during the filter changing operation. Unfortunately, various ones ofthe prior art schemes for interchanging filters have the further drawback of requiring the operator to hold the lamp enclosure during the filtcr changing operation.
SUMMARY OF THE INVENTION In contradistinction to the prior art, the instant invention provides a simple arrangement for quickly and easily changing filters on a lamp enclosure without the necessity of touching such lamp enclosure. As will be described in greater detail, at the heart of the instant invention is a split ring-like member which supports a filter with respect to the lamp enclosure and which includes manually graspable release means for temporarily enlarging the ring-like member when it is desired to remove same from the lamp enclosure and change the filter carried thereby.
OBJECTS OF THE INVENTION Accordingly, it is an object ofthe instant invention to provide a simple, easily operable arrangement for changing filters associated with a lamp enclosure.
Another object of the instant invention is to provide such an arrangement which can be easily operated without the necessity of touching the lamp enclosure.
Other objects of the instant invention as well as a further understanding thereof may be had by referring to the following description and drawings.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING FIG. 1 is an exploded prospective view of the invention hereof.
FIG. 2 is a side view, partially in elevation and partially in prospective, further illustrating the invention hereof.
FIG. 3 is a side elevational view of the instant invention in its assembled condition.
DETAILED DESCRIPTION Turning to the Figures wherein like numerals are used to designate like elements, FIG. I shows a typical light enclosure or housing 10, frequently known as a reflective bowl, within which is appropriately supported a light source (now shown). As can be seen, the housing in generally cylindrical in nature and terminates in an outer annular portion 12 against which is urged the desired filter 14 in a manner to be further described.
The supporting arrangement for carrying the filter l4 and urging it against the outer extremity portion 12 of the enclosure 10 is broadly designated 16 and comprises a generally cylindrical split ring-like member 18 having first and second ends 20 and 22 which are normally biased toward one another to maintain the cylin drical shape illustrated. This bias may be maintained by the natural resiliency of the material comprising the split ring-like member, typically metallic, and, as will be further described, may be supplemented by an expansible biasing spring 24.
As can best be seen in FIG. 1, the split ring-like member 18 includes an inturned annular flange 26 for supporting the filter 14. It will be appreciated that the rim 28 of the filter 14 will, in fact, be sandwiched between the aforenoted flange 26 and the extremity portion 12 of the enclosure 10 when the ring-like member 18 is removably secured to the enclosure 10 in the following manner.
It should be noted that the smallest diameter of the ring-like member 18 (when the first and second ends 20 and 22 thereof immediately confront one another) is slightly less than the diameter of the cylindrical end 30 of the enclosure 10. In securing the filter supporting ringlike member 18 to the enclosure 10, the operator simply telescopes it on the cylindrical end 30 thereof and, in so doing. the slight difference in diameters therebetween forces the ring-like member 18 to slightly open, such that a small space 32 (Fig. 3) will now exist between the confronting end portions 20 and 22. Of course, the natural resiliency of the ring 18, together with the additional biasing spring 24 to be further described, will attempt to return the ring-like member 18 to its initial smaller dia metered configuration, and thereby frictionally retain the ring-like member 18 around the cylindrical portion 30, thereby properly positioning the filter 14 with respect to the housing 10.
The manually graspable release means for temporarily enlarging the ring-like member I8 when it is desired to remove the ring-like member 18 and change the filter 14 comprises first and second generally L- shaped members 34 and 36, respectively. The first member 34 includes a base portion having a first segment 38 secured on the first end 20 of the ring-like member 18 and a second intervally extending segment 40 which freely overlaps the second end 22 ofthe ring-like member 18. An outwardly directed leg portion 42 extends from the end of the aforementioned second segment 40. In like fashion, the second L-shaped member 36 includes a base portion having first segments 44 secured to the second end 22 of the ring-like member 18 and Because of the aforementioned relationship, it should i be appreciated that when one squeezes the leg portions 42 and 48 toward one another in the direction of the arrows shown in FIG. 2, the net result will be to urge the ends and 22 of the ring-like member 18 away from one another to thereby temporarily further enlarge the diameter of the ring-like member 18 whereby it can be easily slid off the cylindrical end 30 of the housing 10. Of course, once the ring-like member 18 has been removed from the housing 10, the filter 14 can be removed and replaced with the entire filterchanging operation requiring only the squeezing of the projections 42 and 48 toward one another and not requiring the operator to handle the housing 10.
To further bias the ends 20 and 22 of the ring-like member 18 toward one another, the aforenoted expansible spring 24 is provided. One end of the spring 50 is secured to the outstanding leg 48 and as best seen in FIG. 3, the other end 52 of the spring 24 is secured to the ring-like member 18 by being inserted in a preselected one of a plurality of apertures 54, 56 or 58 in accordance with the amount of tension desired for the spring 24. In this manner, the amount of frictional force developed on the cylinder portion 30 of the housing 10 can be easily varied.
Thus, there has been described an extremely simple, easy to operate arrangement for changing filters employed in connection with lamps and floodlights. In addition to being extremely simple and inexpensive to manufacture, the supporting arrangement for the interchangeable filters is easily removable from the associated light housing without the necessity ofhandling the housing itself.
Although this invention has been described with respect to its preferred embodiments, it should be understood that many variations and modifications will now be obvious to those skilled in the art, and it is preferred, therefore, that the scope of the invention be limited, not by the specific disclosure herein, only by the appended claims.
What is claimed is:
1. In combination:
a housing for supporting a light source;
support means removably secured to said housing for supporting a filter with respect to said housing, said support means comprising,
a split ring member having first and second ends biased toward one another, whereby said split ring member frictionally engages said housing, said split ring member including an annular flange for supporting said filter, and said housing includes an outer extremity portion which urges said filter against said flange when said split ring member is frictionally engaged on said housing;
manually grapsable release means for temporarily enlarging said split ring member, whereby said split ring member can be easily removed from said housing, said manually graspable release means comprising first and second L-shaped members secured to said split ring member, said first L-shaped member including a base portion having one segment thereof secured to said first end of said split ring member and a second segment thereof freely overlapping said second end of said split ring member from said second segment; said second L-shaped' member including a base portion having one segment thereof secured to said second end of said split ring member and a second s'eggment thereof freely overlapping said first end of said split ring member and an outwardly directed leg portion extending from said second segment; whereby urging said outwardly directed leg portions toward one another will cause the separation of said first and second ends and enlargement of said split ring member; and
further including expansible biasing means one end of which is secured to one of said outwardly directed leg portions and the other end of which is secured to said split ring member for normally urging said first and second ends toward one another.
2. The combination of claim 1 wherein said split ring member includes a plurality of securing means for securing said other end of said expansible biasing means so that said expansible biasing means may be adjustably positioned with respect to said split ring member. whereby the force generated by said expansible biasing means may be varied.
3. The combination of claim 2 wherein said securing means of said split ring member comprises a plurality of apertures spaced thereabout, and said other end of said biasing means is received in a preselected one of said apertures in accordance with the biasing force desired for said biasing means.
4. In combination:
a housing for supporting a light source;
support means removably secured to said housing for supporting a filter with respect to said housing, said support means comprising,
a split ring member having first and second ends biased toward one another, whereby said ring member frictionally engages said housing;
manually graspable release means for temporarily enlarging said split ring member, whereby said split ring member can be easily removed from said housing, said manually graspable release means comprising first and second L-shaped members secured to said split ring member, said first L-shaped member including a base portion having one segment thereof secured to said first end of said split ring member and a second segment thereof freely overlapping said second end of said split ring member and an outwardly directed leg portion extending from said second segment; said second L-shaped member including a base portion having one segment thereof secured to said second end of said split ring member and a second segment thereof freely overlapping said first end of said split ring member and an outwardly directed leg portion extending from said second segment; whereby urging said outwardly directed leg portions toward one another will cause the separation of said first and second ends and enlargement of said split ring member; and
further including expansible biasing means one end of which is secured to one of said outwardly directed leg portions and the other end of which is secured to said split ring member for normally urging said first and second ends toward one another.
curing said other end of said expansible biasing means so that said expansible biasing means may be adjustably positioned with respect to said split ring member, whereby the force generated by said expansible biasing means may be varied.
l l k

Claims (6)

1. In combination: a housing for supporting a light source; support means removably secured to said housing for supporting a filter with respect to said housing, said support means comprising, a split ring member having first and second ends biased toward one another, whereby said split ring member frictionally engages said housing, said split ring member including an annular flange for supporting said filter, and said housing includes an outer extremity portion which urges said filter against said flange when said split ring member is frictionally engaged on said housing; manually grapsable release means for temporarily enlarging said split ring member, whereby said split ring member can be easily removed from said housing, said manually graspable release means comprising first and second L-shaped members secured to said split ring member, said first L-shaped member including a base portion having one segment thereof secured to said first end of said split ring member and a second segment thereof freely overlapping said second end of said split ring member and an outwardly directed leg portion extending from said second segment; said second L-shaped member including a base portion having one segment thereof secured to said second end of said split ring member and a second seggment thereof freely overlapping said first end of said split ring member and an outwardly directed leg portion extending from said second segment; whereby urging said outwardly directed leg portions toward one another will cause the separation of said first and second ends and enlargement of said split ring member; and further including expansible biasing means one end of which is secured to one of said outwardly directed leg portions and the other end of which is secured to said split ring member for normally urging said first and second ends toward one another.
2. The combination of claim 1 wherein said split ring member includes a plurality of securing means for securing said other end of said expansible biasing means so that said expansible biasing means may be adjustably positioned with respect to said split ring member, whereby the force generated by said expansible biasing means may be varied.
3. The combination of claim 2 wherein said securing means of said split ring member comprises a plurality of apertures spaced thereabout, and said other end of said biasing means is received in a preselected one of said apertures in accordance with the biasing force desired for said biasing means.
4. In combination: a housing for supporting a light source; support means removably secured to said housing for supporting a filter with respect to said housing, said support means comprising, a split ring member having first and second ends biased toward one another, whereby said ring member frictionally engages said housing; manually graspable release means for temporarily enlarging said split ring member, whereby said split ring member can be easily removed from said housing, said manually graspable release means comprising first and second L-shaped members secured to said split ring member, said first L-shaped member including a base portion having one segment thereof secured to said first end of said split ring member and a second segment thereof freely overlapping said second end of said split ring member and an outwardly directed leg portion extending from said second segment; said second L-shaped member including a base portion having one segment thereof secured to said second end of said split ring member and a second segment thereof freely overlapping said first end of said split ring member and an outwardly directed leg portion extending from said second segment; whereby urging said outwardly directed leg portions toward one another will cause the separation of said first and second ends and enlargement of said split ring member; and further including expansible biasing means one end of which is secured to one of said outwardly directed leg portions and the other end of which is secured to said split ring member for normally urging said first and second ends toward one another.
5. The combination of claim 4 wherein said first and second ends of said split ring member are biased toward one another by the resiliency of the material comprising said split ring member.
6. The combination of claim 4 wherein said split ring member includes a plurality of securing means for securing said other end of said expansible biasing means so that said expansible biasing means may be adjustably positioned with respect to said split ring member, whereby the force generated by said expansible biasing means may be varied.
US389521A 1973-08-20 1973-08-20 Easily changeable filter holder Expired - Lifetime US3871752A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0211793A2 (en) * 1985-05-16 1987-02-25 Elbit Computers Ltd. Split-image optical viewing instrument
US4802718A (en) * 1986-09-03 1989-02-07 Grumman Aerospace Corporation One piece frame for holding a holographic element in a holographic system
WO1990002967A1 (en) * 1988-09-08 1990-03-22 Grumman Aerospace Corporation Apparatus for opening and holding a frame and a method of mounting an optical element in a frame
US5360018A (en) * 1992-05-26 1994-11-01 Sutton Chen Positionable viewing shield with disposable transparent medium
US5467229A (en) * 1994-12-19 1995-11-14 Xerox Corporation Adjustable laser diode lens assembly
US5877902A (en) * 1996-10-31 1999-03-02 Litton Systems, Inc. Mounting assembly for image intensifier tube in optical sight

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1754282A (en) * 1928-12-18 1930-04-15 Freeman H Owens Color-screen accessory for cameras
US1775180A (en) * 1927-06-16 1930-09-09 Worsching Richard Light screen for the lens of photographic cameras
US2090086A (en) * 1937-02-11 1937-08-17 John H Weiner Signaling device
US2874430A (en) * 1953-10-15 1959-02-24 Eaton Mfg Co Clamp

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1775180A (en) * 1927-06-16 1930-09-09 Worsching Richard Light screen for the lens of photographic cameras
US1754282A (en) * 1928-12-18 1930-04-15 Freeman H Owens Color-screen accessory for cameras
US2090086A (en) * 1937-02-11 1937-08-17 John H Weiner Signaling device
US2874430A (en) * 1953-10-15 1959-02-24 Eaton Mfg Co Clamp

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0211793A2 (en) * 1985-05-16 1987-02-25 Elbit Computers Ltd. Split-image optical viewing instrument
EP0211793A3 (en) * 1985-05-16 1989-05-24 Elbit Computers Ltd. Split-image optical viewing instrument
US4802718A (en) * 1986-09-03 1989-02-07 Grumman Aerospace Corporation One piece frame for holding a holographic element in a holographic system
WO1990002967A1 (en) * 1988-09-08 1990-03-22 Grumman Aerospace Corporation Apparatus for opening and holding a frame and a method of mounting an optical element in a frame
US4929056A (en) * 1988-09-08 1990-05-29 Grumman Aerospace Corporation Apparatus for opening and holding a frame and a method of mounting an optical element in a frame
US5360018A (en) * 1992-05-26 1994-11-01 Sutton Chen Positionable viewing shield with disposable transparent medium
US5467229A (en) * 1994-12-19 1995-11-14 Xerox Corporation Adjustable laser diode lens assembly
US5877902A (en) * 1996-10-31 1999-03-02 Litton Systems, Inc. Mounting assembly for image intensifier tube in optical sight
US5884884A (en) * 1996-10-31 1999-03-23 Litton Systems, Inc. Mounting assembly for image intensifier tube in optical sight
US5902996A (en) * 1996-10-31 1999-05-11 Litton Systems, Inc. Mounting assembly for image intensifier tube in optical sight

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