US1293678A - Photographic-printing frame. - Google Patents

Photographic-printing frame. Download PDF

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Publication number
US1293678A
US1293678A US6424315A US6424315A US1293678A US 1293678 A US1293678 A US 1293678A US 6424315 A US6424315 A US 6424315A US 6424315 A US6424315 A US 6424315A US 1293678 A US1293678 A US 1293678A
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frame
grooves
pivoted
print
photographic printing
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US6424315A
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William Ebenezer Bond
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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 in which a two-part removable back is carried b-y a frame wherein the negative is placed and fastening devices are pivoted to the back and engage the frame or fittings thereon for the purpose of securing the back in place while permitting a p ortion thereof to be folded back for inspection of the print.
  • the purpose of this invention is to provide improved means for overcoming these disadvantages.
  • ⁇ Figure 1 is an elevation of the rear of a photographic printing frame fitted with my improvements.
  • Figs. 2 and 3 are cross sections on the lines 22 and 3-3 respectively of Fig. l.
  • A is the frame and B the removable back consisting of two portions B1 and B2 hinged together.
  • the portlon B2 of the back B which is intended to remain secured when the print is being inspected and is only intended to be unfastened when the paper is to be inserted in the frame or the print removed, is provided with a member such as the usual two armed leaf spring C centrally pivoted to the back at D and adapted to engage at its ends with the frame, as for example in grooves E in the inner faces of the side members of the frame; but instead of relying on the frictional engagement of the ends of said member C for the purpose of holding this part of the back against movement, there is provided according to the invention for each end of the member a fastening of such nature that the two fastenings, when engaged, hold the member rigidly against rocking movement in the plane of the frame.
  • a member such as the usual two armed leaf spring C centrally pivoted to the back at D and adapted to engage at its ends with the frame, as for example in grooves E in the inner faces of the side members of the frame; but instead of relying on the frictional engagement of the ends of said
  • Such fastening may conveniently take the form of a snap fastening which may embody a hole or depression F in the end of the member (one in each end) and a pin or projection Gr 0n the frame or vice versa, so that when the back is in place and the member C manipulated to engage, these snap fastenings may also engage and securely hold the member C and consequently the portion B2 of the back to which the member is pivoted.
  • a snap fastening which may embody a hole or depression F in the end of the member (one in each end) and a pin or projection Gr 0n the frame or vice versa, so that when the back is in place and the member C manipulated to engage, these snap fastenings may also engage and securely hold the member C and consequently the portion B2 of the back to which the member is pivoted.
  • a compressible pad or pads I-I for example of rubber or a suitable sprin or springs, against the lower end of the ra bet of the frame A, so that in order to engage the snap fastening slome pressure will be needed of the back endwise in the frame, compressing the pad 0r pads, and firmly bedding the end of the back against the pad or pads at the end of the frame.
  • the portion B2 of the back which is intended to remain secured while the print is being inspected is also preferably made somewhat wider than the other portion, (that is to say in the direction parallel to the'line of the hinges K K1) so that the portion B1 being not so wide is not liable to contact withthe edges of the frame when it is being manipulated, a space BX being left between it and the frame.
  • a photographic printing frame the combination'of an exterior frame having groovesin the inner faces of its side members, a two-part hinged back, a two-armed member pivoted on one part of the back, and adapted to engage the said grooves, and additional engaging means carried by said frame adapted to hold the two-armed member when engaged in the grooves rigid against sliding movement in the grooves, said additional engaging means being so located as to tend to force the back firmly against one end of the frame.
  • a photographic printing frame the combination of an exterior frame having grooves in the inner faces of its side members, a two-part hinged back, a two-armed spring member pivoted on one part of the back, and adapted to engage the said grooves, and snap fastening means in said grooves adapted to hold the two-armed member when engaged therewith rigid Vagainst rocking movement in the plane of the frame.
  • a photographic printing frame the combination of a'two-part hinged back, a two-armed member pivoted on one part of theA back, an exteriorv frame, engagingr means carried by said frame'adapted to hold the two-armed member when engaged rigid against rocking'movement in the plane of the frame, and compressible pads in the frame against which the said part of the back is adapted to be pressed by the engagement of the member engaging means.
  • a photographic printing frame the combination, with an exterior frame; of a removable.back, ⁇ comprising a part normally in fixed position, and a movable part hinged to the xe'd part and adapted to be manipulated for inspection of the print; the fixed part having a close fit in the frame, and the movable part being of less width than said fixed part and arranged with its lateral edges spaced from those of said frame, thereby to prevent accidental shifting of said back, and contact between the adjacent lateral edges ofsaid movable part and said frame, during manipulation ofy the movable part.
  • a photographic printing frame the combination, with an exterior frame; of fa back comprising a part normally in fixed position, a movable part adapted to Vbe manipulated for inspection of the print, and hinges connecting said parts; the knuckles of the hinges beingsunk in the fixed part so as to displace the axes of said hinges from the meeting plane of the two parts, thereby to prevent the movable part from exerting a scraping action on the print.
  • a photographic printing frame the combination of a two-part hinged back, a two-armed member pivoted on one part of the back, an exterior frame, engaging means carried by said frame adapted to hold the two-armed member when engaged rigid against rocking movement in the plane of the frame, and two separate retaining fingers pivoted on the other part of the back adapted to engage retaining means on the frame by swinging movement in opposite directions.
  • a photographic printing frame comprising a two-part hinged back having pivoted on that portion of the back which is intended to be manipulated for inspection of thelprint two retaining fingers adapted to be swung about their pivots in opposite directions to one another substantially as and for the purpose set forth.
  • a photographic printing frame, oo1n prising a two-part hinged back having on that portion of the back which is intended to be manipulated for inspection of the print two separate retaining fingers pivoted respeetively on two pivots in a line transversely of the back and adapted to be swung about their pivots.

Description

W. E. BOND.
PHOTOGRAPHIC PRINTING FRAME.
APPLICATION FILED Nov. so. 1915.
Inl/mier:
/I/bmm Eben/ejer 50nd,.
by m5 Amr. @y
WILLIAM EBENEZER BOND, OF COUNTY OF HERTFORD, ENG-LAND.
'.PHOTOGRAPHIC-PRINTING FRAME.
Specification of Letters Patent.
Patented Feb. 11, 1919.
Application led November 30, 1915. Serial No. 64,243.
To aZZ whom t may concern Be it known that I, WILLIAM EBENEZER BOND, a subject of the King of England, residing at county of Hertford, in England, have invented a certain new and useful Improvement in Photographic Printing Frames, of which the following is a specification. g
This invention relates to photographic printing frames in which a two-part removable back is carried b-y a frame wherein the negative is placed and fastening devices are pivoted to the back and engage the frame or fittings thereon for the purpose of securing the back in place while permitting a p ortion thereof to be folded back for inspection of the print.
In printing frames of this kind as previously constructed the portion of the back` which is intended to remain secured while the=other portion is folded back, has not hitherto been so rmly held as to prevent a possible slight displacement whereby the print may be shifted and rendered useless. The fastening devices have also been of such a nature that their manipulation has a tendency to shift the back and displace the print.
The purpose of this invention is to provide improved means for overcoming these disadvantages.
Referring to the annexed drawings which illustrate a method of carrying this invention into effects- `Figure 1 is an elevation of the rear of a photographic printing frame fitted with my improvements. Figs. 2 and 3 are cross sections on the lines 22 and 3-3 respectively of Fig. l.
A is the frame and B the removable back consisting of two portions B1 and B2 hinged together.
According to the invention the portlon B2 of the back B which is intended to remain secured when the print is being inspected and is only intended to be unfastened when the paper is to be inserted in the frame or the print removed, is provided with a member such as the usual two armed leaf spring C centrally pivoted to the back at D and adapted to engage at its ends with the frame, as for example in grooves E in the inner faces of the side members of the frame; but instead of relying on the frictional engagement of the ends of said member C for the purpose of holding this part of the back against movement, there is provided according to the invention for each end of the member a fastening of such nature that the two fastenings, when engaged, hold the member rigidly against rocking movement in the plane of the frame. Such fastening may conveniently take the form of a snap fastening which may embody a hole or depression F in the end of the member (one in each end) and a pin or projection Gr 0n the frame or vice versa, so that when the back is in place and the member C manipulated to engage, these snap fastenings may also engage and securely hold the member C and consequently the portion B2 of the back to which the member is pivoted.
It will be understood that in order that this method of securing the member may be effective to prevent the back from shifting, the fastenings must be so placed that when engaged the back is firmly pressed against the end of the frame.
'Additional security is provided for by placing a compressible pad or pads, I-I for example of rubber or a suitable sprin or springs, against the lower end of the ra bet of the frame A, so that in order to engage the snap fastening slome pressure will be needed of the back endwise in the frame, compressing the pad 0r pads, and firmly bedding the end of the back against the pad or pads at the end of the frame.
In order to prevent the manipulation of the closing device on the other portion B1 of the back from having such tendency to shift the back as is found with a single leaf spring pivoted to this part of the back, owing principally to the comparatively large twisting leverage which is exerted by the spring when it is being turned on its pivot and is frictionally moving in the grooves or fastening members of the frame, the single leaf spring on this part of the back is replaced by two separate springs J J1 which may be pivoted on a common center or on separate centers on the back as illustrated and are intended to be manipulated at the same time in opposite rotary directions, so that any frictional resistance to their engagement is in the same direction as regards the frame and is withstood by the aforesaid snap fastenings and pads equally on both sides of the frame.
The portion B2 of the back which is intended to remain secured while the print is being inspected is also preferably made somewhat wider than the other portion, (that is to say in the direction parallel to the'line of the hinges K K1) so that the portion B1 being not so wide is not liable to contact withthe edges of the frame when it is being manipulated, a space BX being left between it and the frame.
I havealso found it convenient to so attach the hinges K K1 by which thetwoparts Bl B2 of the back are secured to one another that the axis of these'hinges is not in the meetingplane of the edges of the two parts B1 B2 but is displaced toward the lower end of back as shown in Fig. l. This obviates any scraping action of the lower inside edge of the part B1 against the back of the print when the.` part B1 is folded into the frame after the inspection of the print.
I havefound that it is convenient, especially inthe smaller sizes of frames, to bevel the side edges of the portion B2, as shown at B4 in F ig. 3. This wvill enable the middle part of the saidportion B2 to be made relatively thiclrer, or the depth ofthe side members of the frame A to be less and yet allow.
the ends of the member C to easily engage the grooves E.
What I claim as my invention and desire to secure by Letters Patent of 'the United States is 1. In a photographic printing frame the combination yof lan exterior frame having grooves in the inner faces of its side members, a two-part hinged back, a two-armed member pivoted on one part of the back and adapted to engage the said grooves, and additional engaging means carried by said frame adapted to hold the two-armed member when engaged in the grooves rigid against rocking movement in the plane of the frame. A
2. In a photographic printing frame the combination'of an exterior frame having groovesin the inner faces of its side members, a two-part hinged back, a two-armed member pivoted on one part of the back, and adapted to engage the said grooves, and additional engaging means carried by said frame adapted to hold the two-armed member when engaged in the grooves rigid against sliding movement in the grooves, said additional engaging means being so located as to tend to force the back firmly against one end of the frame.
3. In a photographic printing frame the combination of an exterior frame having grooves in the inner faces of its side members, a two-part hinged back, a two-armed spring member pivoted on one part of the back, and adapted to engage the said grooves, and snap fastening means in said grooves adapted to hold the two-armed member when engaged therewith rigid Vagainst rocking movement in the plane of the frame.
4. In a photographic printing frame, the
combination of an exterior frame-having grooves in the inner faces of its side members and engaging members in said grooves, a .back panel insertible in said frame, and a two-armed member pivoted on said panel and having its extremities adapted to abut against and form snap engagement with said engaging members.
5. In a photographic printing frame the combination of a'two-part hinged back, a two-armed member pivoted on one part of theA back, an exteriorv frame, engagingr means carried by said frame'adapted to hold the two-armed member when engaged rigid against rocking'movement in the plane of the frame, and compressible pads in the frame against which the said part of the back is adapted to be pressed by the engagement of the member engaging means.
6. In a photographic printing frame, the combination, with an exterior frame; of a removable.back,` comprising a part normally in fixed position, and a movable part hinged to the xe'd part and adapted to be manipulated for inspection of the print; the fixed part having a close fit in the frame, and the movable part being of less width than said fixed part and arranged with its lateral edges spaced from those of said frame, thereby to prevent accidental shifting of said back, and contact between the adjacent lateral edges ofsaid movable part and said frame, during manipulation ofy the movable part. i 4
7 In a photographic printing frame, the combination, with an exterior frame; of fa back comprising a part normally in fixed position, a movable part adapted to Vbe manipulated for inspection of the print, and hinges connecting said parts; the knuckles of the hinges beingsunk in the fixed part so as to displace the axes of said hinges from the meeting plane of the two parts, thereby to prevent the movable part from exerting a scraping action on the print.
8. In aphotographic printing frame the combination of a two-part hinged back, a two-armed member pivoted on one part of the back, an exterior frame, engaging means carried by said frame adapted to hold the two-armed member when engaged rigid against rocking movement in the plane of the frame, and two separate retaining fingers pivoted on the other part of the back adapted to engage retaining means on the frame by swinging movement in opposite directions.
9. A photographic printing frame comprising a two-part hinged back having pivoted on that portion of the back which is intended to be manipulated for inspection of thelprint two retaining fingers adapted to be swung about their pivots in opposite directions to one another substantially as and for the purpose set forth.
10. A photographic printing frame, oo1nprising a two-part hinged back having on that portion of the back which is intended to be manipulated for inspection of the print two separate retaining fingers pivoted respeetively on two pivots in a line transversely of the back and adapted to be swung about their pivots.
l1. In a photographic printing frame, the combination, with an exterior rabbeted frame; of a removable back, Comprising two members hinged together and having dierent widths, the narrower member having its edges disposed in spaced relation to the rabbets of the frame; and means for holding the wider member immovable in said frame. In witness whereof I have signed this specification in the presence of two witnesses.
WILLIAM EBENEZER BOND. Witnesses:
R. I-IADDAN, A. E. HATHAWAY.
Copies of this patent may be obtained foi` ve cents each, by addressing the Commissioner of Patents, Washington, D. G.
US6424315A 1915-11-30 1915-11-30 Photographic-printing frame. Expired - Lifetime US1293678A (en)

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