US1806864A - Jules ernest pallemaerts - Google Patents

Jules ernest pallemaerts Download PDF

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Publication number
US1806864A
US1806864A US1806864DA US1806864A US 1806864 A US1806864 A US 1806864A US 1806864D A US1806864D A US 1806864DA US 1806864 A US1806864 A US 1806864A
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screen
pyramids
coating
pallemaerts
jules
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Expired - Lifetime
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/606—Projection screens characterised by the nature of the surface for relief projection
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer

Definitions

  • rl ⁇ his invention relates to cinema and like projection screens and has for its object the production of a screen which Will give the appearance of a third dimension, namely depth, or a stereoscopic effect, to the plcture projected thereon.
  • the base of the screen is formed of a close texture material, such as linen or muslin, the back being coated with a lead paint to close the pores in the material.
  • the front of the screen is coated With'a transparent and colorless adhesive and on this adhesive are placed a number of glass pyramids to cover the whole front surface of the screen.
  • the pyramids are preferably tetrahedral and made from clear crystal glass the sides being ground clear and polished.
  • a second coating of the transparent adhesive is llowcd over a surface t such a depth as completely to embed the pyramids therein and give a smooth top surface to the screen.
  • My invention is illustrated in the accompanying drawing, which is a sectional elevation of part of a. screen constructed in accordance therewith.
  • l represents the linen or other base of the screen on which is placed a layer 2 of transparent adhesive.
  • the pyra-l mids 3 are secured on this layer of adhesive 2, and a second coating 4 of the transparent adhesive is flowed thereover, so as to completely embed the pyramids therein.
  • 5 represents the lead paint coating on the back of the base 1 to close the pores in the material.
  • the screen thus produced gives the depth dimension to any object, moving or stationary, projected upon it, by the fact that the actual point of dead sharp focus is still on the fabric, having penetrated the glass, but the apexes of the pyramids being nearer to the projector lens are slightly out of focus thus producing a rounded effect to any object shown upon this screen, so that the picture projected on the screen is stereoscopic.
  • a cinematograph and like projection screen comprising a fabric base, a transparent adhesive coating on the front of the fabric base, a plurality of glass pyramids placed on the adhesive coating With their apeXes projecting from the base, and a second coating of the transparent adhesive flowed over the front surface of the screen so as completely to embed the pyramids therein.
  • a cinematograph and like projection screen comprising a fabric base, a lead paint coating on the back of the said fabric base to close the pores in the material, a transparent adhesive coating on the front of the fabric base, a plurality of glass pyramids placed on the adhesive coating with their apexes projecting from the base, and a second coating of the transparent adhesive flowed over the front surface of the screen so as completely to embed the pyramids therein.
  • a cinematograph and like projection screen comprising a fabric base, a lead paint coating on the back of the said fabric base to close the pores in the material, a transparent adhesive coating on the front of the fabric base, a plurality of tetrahedral glass pyramids placed on the adhesive coating, and a second coating of the transparent adhesive flowed over the front surface of the screen so as completely to embed the pyramids therein.

Description

2 FIRST ADHENE coHT 5 LEAD PAINT covmuvcf 1 ansa or SCREEN May 26, l931- J, E. PALLEMAERTS STEREOSCOPIC CINEMA PROJECTION SCREEN Filed Oct.
PYRAMIDS 5 Econo num-z5) VE conrll Patented May 26, 1931 UNITED STATES PATENT OFFICE STEREOSCOPIC CINEMA PROJECTION SCREEN Application 1e 1 October 1, 1928, Serial No. 309,382, and in Great Britain January` 21, 1928.
rl`his invention relates to cinema and like projection screens and has for its object the production of a screen which Will give the appearance of a third dimension, namely depth, or a stereoscopic effect, to the plcture projected thereon.
According to my invention the base of the screen is formed of a close texture material, such as linen or muslin, the back being coated with a lead paint to close the pores in the material.
The front of the screen is coated With'a transparent and colorless adhesive and on this adhesive are placed a number of glass pyramids to cover the whole front surface of the screen. The pyramids are preferably tetrahedral and made from clear crystal glass the sides being ground clear and polished. A second coating of the transparent adhesive is llowcd over a surface t such a depth as completely to embed the pyramids therein and give a smooth top surface to the screen. n
My invention is illustrated in the accompanying drawing, which is a sectional elevation of part of a. screen constructed in accordance therewith. l represents the linen or other base of the screen on which is placed a layer 2 of transparent adhesive. The pyra-l mids 3 are secured on this layer of adhesive 2, and a second coating 4 of the transparent adhesive is flowed thereover, so as to completely embed the pyramids therein. 5 represents the lead paint coating on the back of the base 1 to close the pores in the material.
The screen thus produced, gives the depth dimension to any object, moving or stationary, projected upon it, by the fact that the actual point of dead sharp focus is still on the fabric, having penetrated the glass, but the apexes of the pyramids being nearer to the projector lens are slightly out of focus thus producing a rounded effect to any object shown upon this screen, so that the picture projected on the screen is stereoscopic.
Brilliant illumination is obtainable on this screen, owing to the production of minute relected rays of light between the sides of the pyramids.
I claim:
l. A cinematograph and like projection screen comprising a fabric base, a transparent adhesive coating on the front of the fabric base, a plurality of glass pyramids placed on the adhesive coating With their apeXes projecting from the base, and a second coating of the transparent adhesive flowed over the front surface of the screen so as completely to embed the pyramids therein.
2. A cinematograph and like projection screen comprising a fabric base, a lead paint coating on the back of the said fabric base to close the pores in the material, a transparent adhesive coating on the front of the fabric base, a plurality of glass pyramids placed on the adhesive coating with their apexes projecting from the base, and a second coating of the transparent adhesive flowed over the front surface of the screen so as completely to embed the pyramids therein.
3. A cinematograph and like projection screen comprising a fabric base, a lead paint coating on the back of the said fabric base to close the pores in the material, a transparent adhesive coating on the front of the fabric base, a plurality of tetrahedral glass pyramids placed on the adhesive coating, and a second coating of the transparent adhesive flowed over the front surface of the screen so as completely to embed the pyramids therein.
In testimony whereof I have hereunto set my hand this 20th day of August, 1928.
JULES ERNEST PALLEMAERTS.
US1806864D Jules ernest pallemaerts Expired - Lifetime US1806864A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579892A (en) * 1948-11-20 1951-12-25 C S Wright & Company Outdoor projection screen
US2623433A (en) * 1947-09-20 1952-12-30 Stipek Johann Stereoscopic projection system, including anaglyphic and polarizing filters
US2727427A (en) * 1952-03-03 1955-12-20 Will F Jenkins Apparatus for production of light effects in composite photography
US2800054A (en) * 1953-06-29 1957-07-23 Bosch Arma Corp Projection device with directional lens
US3236150A (en) * 1956-07-23 1966-02-22 Wendell S Miller Screens for projecting systems
US3254556A (en) * 1961-05-29 1966-06-07 Coleman Instr Corp Composite optical prism unit
US3492060A (en) * 1967-03-08 1970-01-27 Eastman Kodak Co Projection screen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623433A (en) * 1947-09-20 1952-12-30 Stipek Johann Stereoscopic projection system, including anaglyphic and polarizing filters
US2579892A (en) * 1948-11-20 1951-12-25 C S Wright & Company Outdoor projection screen
US2727427A (en) * 1952-03-03 1955-12-20 Will F Jenkins Apparatus for production of light effects in composite photography
US2800054A (en) * 1953-06-29 1957-07-23 Bosch Arma Corp Projection device with directional lens
US3236150A (en) * 1956-07-23 1966-02-22 Wendell S Miller Screens for projecting systems
US3254556A (en) * 1961-05-29 1966-06-07 Coleman Instr Corp Composite optical prism unit
US3492060A (en) * 1967-03-08 1970-01-27 Eastman Kodak Co Projection screen

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