US1489880A - Cinematograph and like screen - Google Patents

Cinematograph and like screen Download PDF

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Publication number
US1489880A
US1489880A US650929A US65092923A US1489880A US 1489880 A US1489880 A US 1489880A US 650929 A US650929 A US 650929A US 65092923 A US65092923 A US 65092923A US 1489880 A US1489880 A US 1489880A
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Prior art keywords
screen
fabric
cinematograph
sheet
frame
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Expired - Lifetime
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US650929A
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Dewey Harry
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Individual
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Individual
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Priority to US650929A priority Critical patent/US1489880A/en
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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

Definitions

  • This invention relates to cinematograph and like screens and to fabrics for forming the same.
  • One object of the present invention is to it provide a screen on which the projected pictures will show with greater clearness than heretofore and which can be readily washed or otherwise cleaned when required.
  • Another object of the present invention is to provide a surface for cinematogfaph screens whereby the ener used in lig ting can be reduced without etracting from the efi'ect produced upon the screen.
  • a further object of the present invention is to provide an improved apparatus for supporting a fabric screen so that the tension thereof will remain uniform under changing atmospheric conditions whereby a perfectl fiat and taut screen can be obtamed un or all conditions.
  • Figure 1 is a front view of a screen constructed in accordance with m invention.
  • Figure 2 is a view to an en arged scale showmg one of the s rings.
  • the uncured rubber sur ace a of the proofed fabric or double proofed fabric 7) from which the screen is made is covered with fine mica dust or finel crushed quartz, glass or other suitable re ecting material 0 so that it adheres to but lies exposed upon the surface of the screen.
  • My invention is particularly applicable to screens formed of. what is shown as proofed or double proofed fabric which has a white or whitish sheeny surface and which is preferably maintained in a state of constant tension by the new or improved means hereinafter described.
  • the surface of the fabric is referably treated so as to form innumerable angular or rounded or other highly reflecting surfaces which reflect the light in many or all directions from the face of the screen or fabric.
  • the uncured rubber surface of the proofed or double proofed fabric is well covered all over with a fine mica dust or with a fine dust of powdered quartz or glass or the like, this ust being rolled or otherwise pressed on to the sur ace of the screen to which it adheres.
  • the mica covered surface is roughened or formed by rolling between engraved rollers or by other means into innumerable small PI'OJGCtiODS d and intermediate depressions or irregularly disposed.
  • the screen itself is shown at 1 and it is provided at its edge with a strip of webbin or the like 7 stitched at 8 and enclosing exible wires or the like 3, preferably a separate wire for and. coextensive in length with each side of the screen.
  • the webbing may be omitted and the wires may be enclosed in pockets formed by folding over the edges of the fabric and sticking them to the main sheet by solution.
  • coil springs 6 are arranged around the outer peri hery of the screen at suitable intervals and in the space between the screen and the frame, one end of each coil spring engaging with the supporting frame 5 or the like, whilst the other end engages with the flexible wires 3 carried by the screen 1.

Description

April 8, 1924. 1,489,880
H. DEWEY CINEMATOGRAPH AND LIKE SCREEN FiledjJuly 11, 1925 I HEEEEE EEE aaaaag sagaglggrgagasg HEEEEEEEEEEEEEEEEEE EHE lHEEkHHEL EWHEEEQEEJEE Patented Apr. 8, 1924.
UNITED STATES PATENT OFFICE.
HARRY DEWEY, OF SPABKHILL, BIRMINGHAM, ENGLAND.
OINEMA'IOGRAPH AND LIKE sczamm Application fled July 11, 1928. Serial 80. 850,928. 7
To all whom it may concern.
Be it known that I HARRY DEWEY, a subject of the King of Great Britain, residing at 9 Grove Road, Sparkhill Birmingham,
t in the county of Warwick, lingland, have invented certain new and useful Improvements in Cinemato aph and like Screens; and I do hereby eclare the followin to be a full, clear, and exact description the w same.
This invention relates to cinematograph and like screens and to fabrics for forming the same.
One object of the present invention is to it provide a screen on which the projected pictures will show with greater clearness than heretofore and which can be readily washed or otherwise cleaned when required.
ac Another object of the present invention is to provide a surface for cinematogfaph screens whereby the ener used in lig ting can be reduced without etracting from the efi'ect produced upon the screen.
A further object of the present invention is to provide an improved apparatus for supporting a fabric screen so that the tension thereof will remain uniform under changing atmospheric conditions whereby a perfectl fiat and taut screen can be obtamed un or all conditions.
Referring to the drawings Figure 1 is a front view of a screen constructed in accordance with m invention.
Figure 2 is a view to an en arged scale showmg one of the s rings.
Accordin to my invention the uncured rubber sur ace a of the proofed fabric or double proofed fabric 7) from which the screen is made is covered with fine mica dust or finel crushed quartz, glass or other suitable re ecting material 0 so that it adheres to but lies exposed upon the surface of the screen.
My invention is particularly applicable to screens formed of. what is shown as proofed or double proofed fabric which has a white or whitish sheeny surface and which is preferably maintained in a state of constant tension by the new or improved means hereinafter described.
In forming the improved screen surface,
the surface of the fabric is referably treated so as to form innumerable angular or rounded or other highly reflecting surfaces which reflect the light in many or all directions from the face of the screen or fabric.
To carry out this part of my invention the uncured rubber surface of the proofed or double proofed fabric is well covered all over with a fine mica dust or with a fine dust of powdered quartz or glass or the like, this ust being rolled or otherwise pressed on to the sur ace of the screen to which it adheres. Either before or after the curing process the mica covered surface is roughened or formed by rolling between engraved rollers or by other means into innumerable small PI'OJGCtiODS d and intermediate depressions or irregularly disposed.
In the construction illustrated the screen itself is shown at 1 and it is provided at its edge with a strip of webbin or the like 7 stitched at 8 and enclosing exible wires or the like 3, preferably a separate wire for and. coextensive in length with each side of the screen.
Instead of employing this construction, the webbing may be omitted and the wires may be enclosed in pockets formed by folding over the edges of the fabric and sticking them to the main sheet by solution.
The usual frame or other suitable support is provided and coil springs 6 are arranged around the outer peri hery of the screen at suitable intervals and in the space between the screen and the frame, one end of each coil spring engaging with the supporting frame 5 or the like, whilst the other end engages with the flexible wires 3 carried by the screen 1.
By the rotation of the springs in the space between the sides or edges of the screen and the sides of the frame, they are free of friction on the frame and each can exert its entire tension on the screen.
Owing to the pull of the s rings being transmitted to the fabric 0 the screen throughthe medium of the wire, a much more even distribution of pressure is obtained than when each individual spring is connected to the fabric.
pits e preferably What I claim then is:- retrectile springs mm d in the s aces be- A cinematogreph screen comprising a tween the sides of the reme and e ed sheet of material, a. flexible wire erren d of the sheet and respectively connected at 10 in the sheet near and substentiell pa e1 the ends with a wire of the sheet and one 6 with each edge and extending ong each side of the frame.
side of the sheet, a rigid frame around said In witness whereof I aflix m si ature. sheet of material end spaced therefrom, and HARRY E EY.
US650929A 1923-07-11 1923-07-11 Cinematograph and like screen Expired - Lifetime US1489880A (en)

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US650929A US1489880A (en) 1923-07-11 1923-07-11 Cinematograph and like screen

Applications Claiming Priority (1)

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US650929A US1489880A (en) 1923-07-11 1923-07-11 Cinematograph and like screen

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US1489880A true US1489880A (en) 1924-04-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3041604A (en) * 1957-08-15 1962-06-26 Decca Record Co Ltd Corner reflector formed of taut flat reflecting elements with resilient peripheral tesion frames
US20170102608A1 (en) * 2009-06-12 2017-04-13 Draper, Inc. Tensioned projection screen assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3041604A (en) * 1957-08-15 1962-06-26 Decca Record Co Ltd Corner reflector formed of taut flat reflecting elements with resilient peripheral tesion frames
US20170102608A1 (en) * 2009-06-12 2017-04-13 Draper, Inc. Tensioned projection screen assembly
US10018901B2 (en) * 2009-06-12 2018-07-10 Draper, Inc. Tensioned projection screen assembly

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