US699739A

US699739A - Combined photoprinting and vignetting frame.

Info

Publication number: US699739A
Application number: US6843501A
Authority: US
Inventors: William Armstrong; William Robert Owen Chambers
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-07-15
Filing date: 1901-07-15
Publication date: 1902-05-13
Anticipated expiration: 1919-05-13

Description

No. 699,739. Patented May l3, I902. w. ARMSTRONG & w. n. 0., CHAMBERS. COMBINED PHOTQPRINTING AND VIGNETTING FRAME.

7 (Application filed. July 15, 1901.)

(No Model.)

I u e I I m Wil iams. m 71137 5 "w re STATES PATET ()FFICEEQ \VILLIAM ARMSTRONG AND IVILLIAM ROBERT OlVEN CHAMBERS, OF GATESI-IEAD, ENGLAND.

COMBINED PHOTOPRlNTlNG AND VlGNETTING FRAME.

SPECIFICATIUN formingpart of Letters Patent No. 699,739, dated May 1 3, 1902. Application filed July 15,1961. Serial No. 68,435. (No model.)

T0 at whom, it may concern:

Be it known that we, WILLIAM ARMSTRONG, hair-dresser, residing at 157 Askew road, and WILLIAM ROBERT OWEN CHAMBERS, joiner, residing at 13 Alfred street, Gateshead, in the county of Durham, England, subjects of the King of Great Britain and Ireland, have invented certain new and useful Improvements in Combined Photoprinting and Vignetting Frames, of which the following is a specification.

The invention relates to photoprinting and vignetting frames; and it consists principally in means for connecting the same together I and detaching them from each other. The said means consists in providing the vignetting-frame with a metal lug or plate fixed to each side of the same at right angles to its face and clamping the said frame to the print ing-frame by means of a thumb-screw passing through a slot in each lug and engaging with a screw-threaded hole on the side of the printing-frame. Spring-clips are also provided for fixing the light-diffuser in position, and a small pin or stop is fixed in each half portion of the back of the printing-frame in such position that the lower edge of each of the spring fastening-arms bears against the same in their locked position and prevents any movement of the back or displacement of the printing-paper.

In order to fully describe the said invention, reference is made to the accompanying drawings, in which- Figure 1 isa front face view of the vignetting-frame. Fig. 2 is a back view of the printing-frame fixed to the vignetting-fraine, and Fig. 3 is a side view of the same.

a is the vignetting-frame, and b the printing-frame.

0 represents the lugs or plates fixed to the sides of the frame a, and d represents the slots formed therein, through which pass the thumb-screws c for fixing the two frames 'together.

The frame a is of larger size than the frame I) to admit of angular andlateral adjustment of the vignetting-card. \Vhen the two frames are supplied or sold separately, the printingframes are provided with two wooden strips f, fixed one to each side of the same, to make up any difference in width that may occur between the said frames, the thumb-screws engaging with screwed holes in the plates g, fixed to the strips. I

The light-diffuser h is held in position by placing one end under two fixed clips or springs 2' and fixed by turning a single clip or springj (pivoted in a recess 7t at the top of the frame a) over the face of the same, the said clips or springs being so formed as to admit and hold securely varying thicknesses of material that the diffusers may be made of. By this means a great saving in time results in fixing and detaching the light-diffuser.

The vignetting-frame may be made of either wood or of thin metal plate formed with beaded or thickened edges, thelugs being formed by turning over a strip formed on each side,

or they may be separately soldered or riveted thereto. The back Z of the printing-plate is secured in the ordinary manner by the pivoted springs or arms m; but in order to obviate displacement of the printing-paper in the frame each half of the back is provided with the pin or stop 11, against which the lower edges of the arms m boar when they are in their locked position. To facilitate fixing the back in position, one-half of it is marked, as at 0, and this end is pressed firmly against a similarly-marked end of the frame I). The springs orarmsmarethen turnedandfastened down over the back Z by the pivoted plates 19, their lower edges bearing closely against the pins or stops it, so that no movement, however slight, can take place when the paper is being inspected during the course of printing.

The slots cl in the lugs 0 permit of the adjustment of the frames for varying thicknesses of vignetting-cards and for the insertion of the fingers for manipulating the same.

Having now fully described the nature of our said invention, what we claim, and desire to secure by Letters Patent, is

The improved vignetting attachment for photographic-printing frames comprising a frame a fitted with lugs 0 formed with slots (Z, thumb-screws e engaging with said slots for fixing the frame a to the prinLing-lrmne, and the light-diffuser h held in position by clips 1',j in combination with the printingframe Z) provided with strips fancl plates 9 formed with screw-holes, Lhe back Z, stop '11, marks 0, and pivoted plates p, substantially as described.

1 In Witness whereof We have hereunto set our hands in the presence of two Witnesses.

I WILLIAM ARMSTRONG.

I WILLIAM ROBERT OWEN CHAMBERS.

Vitnesses:

I ARCH ROXBURGH,

i Tnos. HENDERSON.