US737600A

US737600A - Photographic copying apparatus.

Info

Publication number: US737600A
Application number: US15881603A
Authority: US
Inventors: Otis Fair
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-05-26
Filing date: 1903-05-26
Publication date: 1903-09-01
Anticipated expiration: 1920-09-01

Description

' No. 737,600. PATENTED SEPT.1,1903.v

0. FAIR. PHOTOGRAPHIG COPYING APPARATUS.

APPLICATION FILED MAY 26. 1903.

2'SHBETSSHEET l- N0 MODEL.

No. 737,600. PATENTEDSEPT. 1, 1903.

' 0. PAIR.

PHOTOGRAPHIG COPYING APPARATUS.

APPLICATION FILED MAY 26. 1903. I 2 SHEETS-SHEET 2.

N0 MODEL.

m: Noni a virus co, PHOYO-UYHO. WASHiNBTOh, n c

Patented September 1, 1903.

PATENT OEEIcE.

OTIS FAIR, OF DUNDEE, OHIO.

PHOTOGRA PHIC COPYING APPARATUS.

. 'BPECIFICATIOF forming part of Letters Patent No. 737,600, dated September 1, 1903.

Application filed May 26, 1908. Serial No. 158,816. (No model.)

T to whom, it may concern:

Be it known that I, OTIs FAIR, a citizen of the United States, residing at Dundee, in the county of Tuscarawas, State of Ohio, have invented certain new and useful Improvements in Photographic Copying Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to photographic apparatus, and particularly toapparatus used in copying; and it has for its object to provide an arrangement which will provide against interfering rays, so that a clear pencil will result and a consequent sharp negative.

A further object of the invention is to provide an apparatus of this nature which will be convenient in operation and which maybe adjusted to suit various conditions of use.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a perspective view of the apparatus. Fig. 2 is a vertical section of the apparatus, the position of the photographic lens with relation to the screen and object being shown and the convergence of the rays being indicated. Fig. 3 is a side elevation of the apparatus in folded position. Fig. 4 is a detail perspective view of the sliding base of the support for the object.

Referring now to the drawings, the present invention consists of a screen having an opening therein which is designed to be located at the focal center of the lens, the screen being provided with means for varying the size of the opening through which the rays pass as well as the shape of it, the screen being adjustably and foldably mounted upon a base on which is also mounted a support for the object to be photographed, this support being also foldable and adjustable to suit various conditions. The base is shown at and consists of a straight bar having a depending block 11 adjacent to one end in which is a threaded perforation 12 to receive a tripodscrew 13, which acts to hold the base securely upon a tripod 14:.

At the end of the base 10 to which the block 11 is the nearer is formed a vertical slot 15, and engaged in the side of the base is a set-screw 16, which is adapted to enter said slot. The slot 15 is designed to receive the stem of the screen-support, said support ineluding a stem 17, having a T-head 18, to which is hinged the screen 19, the hinges being connected directly to the cross-piece on the face of the screen, adjacent to the bottom edge of the latter. The stem 17 is adjustable vertically in the slot 15 and is held at different points of its adjustment by the set-screw 16, and when the stem is lowered the screen 19 may be folded rearwardly into close relation to and parallel with the base 10.

In the screen 19 and centrally thereof is formed an opening 21 ,through which the lightrays pass, and to partly cover said opening or to expose it to its full extent aplate 22, which is shown in the form of a disk, is centrally pivoted upon the rear face of the screen, said disk lying between the screen and the crosspiece 23, which is secured to the screen and is held in spaced relation thereto at its central portion by means of feet 24 at its ends. The disk is mounted on the pin 25, and to hold it yieldably against rotation the disk 22 in the present instance is provided with four openings, (shown at 26, 27, 28, and 29,) of which the opening 26 is of greater diameter than the opening 21, so that when it registers therewith the full extent of the opening 21 may be employed. The

openings

27 and 28 are of different diameters, each less than that of the opening 21, so that when either registers with opening 21 the latter will be partially covered. The opening 29 is of a dif= ferent shape from the opening 21, so that when it registers with the latter the light-rays passing through the opening 21 will conform to the opening 29, with a corresponding result upon the photographic plate.

In the use of the screen it is disposed be tween the lens 30 of the camera and the object 31'wl1ich is to be photographed, and which object in the present instance may be considered a picture to be copied. The object 31 is attached directly to the upright 32 of the object-support, and which upright is hinged at its lower end to abase 33 and may be held at various angles to said base by means of the set-screw 34, which is engaged with the base and which passes through the arc-shaped slot 34 in the plate 35, which -is secured rigidly to the side of the lower end portion of the upright, with its lower slotted portion projecting below said upright andlying against the side of the base. The base has a depending stem 36, which is engaged through the slot 37, formed vertically and longitudinally of the base 10 at the opposite side of the block 11 from the slot 15, so that the base 33 may be shifted longitudinally of the main supportingbase 10. To hold the base 33 of the support with the upright 32 against oscillatory movement, the under side of the base is provided with parallel grooves 38, in which the base 10 at the sides of its longitudinal slots is received.

In the use of the apparatus the object to be photographed is fixed to a support, as shown in Fig. 2, and the camera is focused upon the object, the screen being then disposed midway between the lens and the object and the plate 22 being adjusted so as to bring the proper one of its openings into registration with the opening 21 of the screen. To further exclude wandering light-rays, the focusing-cloth 39 may be stretched over the space between the screen and the camera-box and may hang downwardly at the sides.

To hold the screen in vertical position, a springplate 40 is pivotally connected at one end to the stem 17, just below the head 18, and is extended upwardly and forwardly over the head, so as to place it under tension, its upper or free end being engaged beneath the hook 41 on the cross-piece 20 at the base of the screen, so that upward pressure is exerted upon said hook, and the screen is held in erect position. NVhen the screen is to be folded rearwardly, a spring-plate is disengaged laterally from the hook-plate.

It will be understood that in practice modifications of the specific construction shown may be made and that any suitable materials and proportions may be used for the various parts without departing from the spirit of the invention.

WVhat is claimed is 1. A photographic apparatus comprising a screen having an opening therethrough and an object-support adjustable toward and away from the screen and to lie at various angles thereto.

2. A photographic apparatus comprising a screen having an opening therein and an object-support adjustably mounted for movement toward and away from the screen and to lie at various angles thereto, said screen being adjustable in a direction longitudinally of the support.

3. A photographic apparatus comprising a base, a screen mounted in the base and adjustable vertically with respect thereto, and an object-support including a lower member slidably mounted in the base, an upper member hinged to the lower member and movable in a plane at right angles to the face of the screen, and means carried by said members for holding them at various angles to each other.

4. A photographic apparatus comprising a base, a screen having a stem engaged in the base for vertical sliding movement, means for holding the stem at differentpoints of its movement, said screen having an opening th erethrough, a disk rotatably mounted upon the screen and having perforations therein of various dimensions disposed for successive registration with the opening in the screen, means for holding the disk yieldably against rotation, and an object-support including a lowermember having a stem slidably engaged in the base for movement toward and away from the screen, an upper member hinged to the lower member and movable in a plane at right angles to the screen, and means for holding the upper member at various angles to the lower member.

In testimony whereof I affix my signature in presence of two witnesses.

OTIS FAIR. IVitnesses:

N. K. JONES, J. S. BRADLEY.