US867698A - Blue-printing frame. - Google Patents

Blue-printing frame. Download PDF

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Publication number
US867698A
US867698A US33651406A US1906336514A US867698A US 867698 A US867698 A US 867698A US 33651406 A US33651406 A US 33651406A US 1906336514 A US1906336514 A US 1906336514A US 867698 A US867698 A US 867698A
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Prior art keywords
shaft
roller
sheet
base
secured
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Expired - Lifetime
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US33651406A
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Julien A Bried
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Individual
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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
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing

Definitions

  • This invention relates to photographic printing frames for printing from flexible cliches, such as tracings, films, or the like, the object of the invention being to provide an improved construction of frame in which there will be no possibility of breakage of glass, which can be operated quickly, which will dispense with the use of felt or other padding, and which will be lighter and easier to handle than frames of prior construction.
  • FIG. 1 is a perspective view of the frame
  • Fig. 2 is a longitudinal section through the tension roller
  • Fig. 3 is a detail perspective view, partly in section on the line 33 of Fig. 2, showing the position of the pawl and ratchet device for tightening the roller, when in use.
  • 1 indicates a skeleton frame of wood or other suitable material, having the end pieces 2. Secured to said end pieces are the ends of an arched or convex base or foundation 3, preferably of sheet metal, as aluminium. Secured to one end of said arched base is the end of a sheet 4 of thin celluloid, translucent, and preferably transparent. The other end'of said sheet is secured to the circumference of a roller 5 carried by a shaft 6. Said shaft passes loosely through the ends of the roller, and a spiral spring 7 surrounds said shaft, one end thereof being secured to the shaft and the other end to the end flange 8 of the roller. Upon the shaft outside the roller are secured at one end a ratchet wheel 9 and a handle 10.
  • the celluloid sheet is laid over the same by means of the roller until the shaft 6 enters sockets 11 formed in brackets 12 secured to the frame. Latches 13 are then caused to engage lugs 14 on the brackets, thus retaining the shaft in position in the sockets.
  • the operator then turns the handle transmitting a rotary nfovement to the roller through the interposed spring, so that thereby tension is applied to the celluloid sheet, causing it and the underlying sheets to lie very close to each other on the convexbase.
  • a pawl 15 secured upon one of the brackets engages in succession the teeth of the ratchet wheel 9 and prevents the return of the shaft.
  • I claim 1 In a photographic printing frame, the combination of an arched or convex smooth baseor foundation. :1 sheet of translucent flexible material secured at one end to one end of said arched base, and means for securing the other end of said sheet at the other end thereof and for drawing the sheet tight over the base, substantially as described.
  • a photographic printing frame the combination of an arched or convex smooth base or foundation, :1 sheet of translucent flexible material secured at one end to one end of said arched base, and means for securing the other end of said sheet at the other end thereof and for drawing the sheet tight over the base, comprising a roller to which the sheet is secured, a shaft therefor, a spring connecting the roller and shaft, and means for turning said shaft, substantially as described.
  • a photographic printing frame the combination of an arched or convex smooth base or foundation, a sheet of translucent flexible material secured at one end to one end of said base, a roller to which the other end is secured, a

Description

No. 867,698. PATENTED OUT. 8, 1907. J. A. BRIED. BLUE PRINTING FRAME.
APPLIOATION FILED 8EPT.27,1906.
fly. 2.
m I v WITNESSES: R LN'VENTOA,
A TTORNE Y.
JULIEN A. DRIED, OF SAN FRANCISCO, CALIFORNIA.
BLUE-PBINTIN G FRAME.
Specification of Letters Patent.
Patented Oct. 8, 1907.
. Application filed September 27, 1906. Serial No. 336,514.
To all whom it may concern:
Be it known that I, JULIEN A. Bruno, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Blue-Printing Frames, of which the following is a specification.
This invention relates to photographic printing frames for printing from flexible cliches, such as tracings, films, or the like, the object of the invention being to provide an improved construction of frame in which there will be no possibility of breakage of glass, which can be operated quickly, which will dispense with the use of felt or other padding, and which will be lighter and easier to handle than frames of prior construction.
In the accompanying drawing Figure 1 is a perspective view of the frame; Fig. 2 is a longitudinal section through the tension roller; Fig. 3 is a detail perspective view, partly in section on the line 33 of Fig. 2, showing the position of the pawl and ratchet device for tightening the roller, when in use.
Referring to the drawing, 1 indicates a skeleton frame of wood or other suitable material, having the end pieces 2. Secured to said end pieces are the ends of an arched or convex base or foundation 3, preferably of sheet metal, as aluminium. Secured to one end of said arched base is the end of a sheet 4 of thin celluloid, translucent, and preferably transparent. The other end'of said sheet is secured to the circumference of a roller 5 carried by a shaft 6. Said shaft passes loosely through the ends of the roller, and a spiral spring 7 surrounds said shaft, one end thereof being secured to the shaft and the other end to the end flange 8 of the roller. Upon the shaft outside the roller are secured at one end a ratchet wheel 9 and a handle 10.
The sensitive paper and the original or flexible negative having been laid' upon the base, the celluloid sheet is laid over the same by means of the roller until the shaft 6 enters sockets 11 formed in brackets 12 secured to the frame. Latches 13 are then caused to engage lugs 14 on the brackets, thus retaining the shaft in position in the sockets. The operator then turns the handle transmitting a rotary nfovement to the roller through the interposed spring, so that thereby tension is applied to the celluloid sheet, causing it and the underlying sheets to lie very close to each other on the convexbase. As the shaft is turned to energize the spring, a pawl 15 secured upon one of the brackets engages in succession the teeth of the ratchet wheel 9 and prevents the return of the shaft. When the shaft has been turned to provide sufficient tension upon the celluloid sheet, the apparatus is ready for exposure. To release the shaft,
it is only necessary to remove the pawl from the ratchet wheel, and then disengage the latches from the lugs. The celluloid sheet is then wound up on the roller, and the original and print removed.
The advantages of this construction over prior forms of photographic printing frames for blue printing and the like are that, no glass being used, the risk of loss through breakage of glass is eliminated; the frame can be arranged for exposure and opened in a small fraction of the time required with some prior frames; the use of felt or other padding is no longer required; and the device is lighter and more easily handled than certain printing frames of the old style.
I claim 1. In a photographic printing frame, the combination of an arched or convex smooth baseor foundation. :1 sheet of translucent flexible material secured at one end to one end of said arched base, and means for securing the other end of said sheet at the other end thereof and for drawing the sheet tight over the base, substantially as described.
2. In a photographic printing frame, the combination of an arched or convex smooth base or foundation, :1 sheet of translucent flexible material secured at one end to one end of said arched base, and means for securing the other end of said sheet at the other end thereof and for drawing the sheet tight over the base, comprising a roller to which the sheet is secured, a shaft therefor, a spring connecting the roller and shaft, and means for turning said shaft, substantially as described.
3. In a photographic printing frame, the combination of an arched or convex smooth base-or foundation, :1 sheet of translucent flexible material secured at one end to one end of said arched base, a roller to which the other end is secured, a shaft for the roller, a coiled spring around the shaft connected thereto and to the roller, sockets for the shaft at the other end of the base or foundation, and means for turning the shaft in the sockets to wind up the spring, and apply tension to the sheet, substantially as described.
4. In a. photographic printing frame, the combination of an arched or convex smooth base or foundation, a sheet of translucent flexible material secured at one end to one end of said base, a roller to which the other end is secured, a
,shaft for said roller, a coiled spring around the shaft connected thereto and to the roller, sockets for the shaft at the other end of the base or foundation, means'for removabiy securing the shaft in the sockets, and means for turning the shaft in the sockets to wind up the spring, and apply tension to the sheet, substantially as described.
5. In a photographic printing frame, the combination of an arched or convex smooth base or foundation, a sheet of translucent flexible material secured at one end to one end of said base, a roller to which the other end is secured, a
shaft for said roller, a coiled spring around the shaft connected thereto and to the roller, sockets for the shaft at the other end of the base or foundation, means for turning the shaft in the sockets, and means for holding the roller in the position to which it is turned, substantially as described.
6. In a photographic printing frame. the combination of an arehed or convex smooth base or foundation. :1 sheet of lranslueent ilexihle mni'erini secured nt. one end to one end of said base. a roiier to which the other end is sernred. a shaft for said roller. a coiled spring around the shaft eonneeted thereto and to the roiier, sockets for the shaft. at the other end of the base or foundation, means for turning the shaft in the sockets, and means for holding the roiier in position to which it is turned, said means comprising :1
10 ratchet wheel carried by the roller and a pawl carried by 1 the frame and adapted to engage said ratchet wheel when the shaft. has been moved into said sockets. suhstantiniLv iili deflerihed.
In testimony whereof I have hereunto set my hand in the presence of tn'o subscribing witnesses.
JUL] EN A. BIUED.
Witnesses I M. 'nmn'r, B. Naoos.
US33651406A 1906-09-27 1906-09-27 Blue-printing frame. Expired - Lifetime US867698A (en)

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US33651406A US867698A (en) 1906-09-27 1906-09-27 Blue-printing frame.

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