US918509A - Photographic-printing apparatus. - Google Patents

Description

W. B. GONAWAY & C. L. STEVENS.

PHOTOGRAPHIG PRINTING APPARATUS.

APPLICATION FILED JULY 29,1908.

Patented Apr. 20, 1909.

anvan foal photogra hic WILLIAM B. (lONAWAY AND CARROLL L. STEVENS, OFAURORA, INDIANA.

Specification of Letters Patent.

rnorosnarmo-rnmrme APPARATUS.

Patented April so, 1909.

Application filed. July 29, 1908. Serial No. 445,912.

To all whom it may concern: Be it known that we, WrLLIAM B. 'CONA- WAY and CARROLL L. STEVENS, citizens of the United States ofAmerica, and residents of Aurora, county of Dea'rborn and State of Indiana, have invented certain new and useful Improvements in Photographic-Printing Apparatus, of which the following is a specification. 1'

Our invention relates to improvements in rinting apparatus. One 0 its dbjects is to provide a convenient means for printingphotographs'by artificial light, to secure uniform prints, and to,

avoid waste of material.

Another object is to provide an improved prrfingement and means for regulating the i t. Another obi'ect is to provide improved means to regu ate and vary the time of exposure of the prints, and register the numer of rints made.

Anot er object is to provide improved means to turn on and off the light and stop the registering a paratus after the .prints have received su cient exposure, or when the ap aratus is not in use.

It rther consists in certain details of form, combination and arrangement, all of which will be, more fully set forthin the description of the accompanying drawings, in which Figure 1 is a front elevation of our improved apparatus' Fig. 2 is a section on line 11-?) of ig. 1. Fig.3 is a diagram of the electrical switches and wiring connecting the lights and motor and switches in circuit. Fig. 4 is sectional detail view of the friction-clutc Fig. 5 is an enlarged detail of the register, indicating the number of prints produced. Fi 6 is a side elevation .of a modification o the transmitting mechanism.

In the accompanying drawings, A, represents a frame or cabinet, within which is contained the apparatus and mechanism. In the front of the cabinet we provide one or T110138 openings, or windows, A, to receive the ordlnaryphotographic rinting frames, which are seated therein acing inwardly, and may be held inplace by spring latches, a. We also preferably rovide springs, a,

d ge of the printing ment is also made to receive and retain plates of ground glass, a, in front of the printing frames, which plates, a may be removed and replaced as required. The ground glass serves to diffuse the light evenly over the prints. The artificial light is obtained from a series of incandescent electric lights, B, the rear or base portion of the globes of said lights being silvered or mirrored to reflect the light toward the. rinting frames. The number of lights used will depend upon the size of the prints it is desired to produce.

The respective lights are separated from each other by partitions, b, of approximately the same depth as the length of the light globes, so that the light from each globe is irected toward that portion of the printing frame directly in front of the globe, and preventedfrom striking upon other parts of the printing frame at undesirable angles.

Each incandescent light has a separate circu1 t, which is controlled by one of the switches, C, by means of which switches,

C, and desired number of said lightsinaybe cut into or out of circuit, the combination of lights being arranged to correspond with the requirements of the particular negative in use, and varied, if required, with each change of negative.

C represents the main switch between the line and the lights and motor in the cabinet A. The bench, or table, A of cabinet, A, is provided with a anel of rub or orange glass, at, which is iluminated mm the underside by an incandescent light, a, so that by placing the printing frame over the panel, a, the operator is enabled to arrange a fresh sheet of sensitized paper in proper position over the negative and to close the printing frame thereonf If desired, a panel of white glass may be used anda globe of colored glass over the electric light.

Ve operate the mechanism controlling the lights, and timing and registering the prints, preferably by means of a small electric motor D of shunt type. Motors of the shunt type will run at substantially a uniform number of revolutions per minute, and by means of a train of gears 03, d, d d d 03, cl, (Z commencin with gear, at, on the motor shaft and terminatin in gear, (1, loosely mounted on the shaft, E the speed of gear, d, is reduced to one revolution per minute. The shafts, (Z carrying the respective ears, (1, to (Z are journaled in brackets, attached to the inside of cabinet, A. The shaft E, has splined thereto a disk, e, which is held in frictional engagement with gear, 61, by

means of a spring, e, pressing at its opposite end upon a collar locked to the shaft, E. A crank arm or lever, F, is rigidly attached to the end of shaft, E, outside the cabinet, A, the free end of the lever, F, being adapted to travel over a dial, f, divided to indicate frac-- tions of a minute.

G, represents a rock shaft journaled at the zero point on dial, f, and provided outside the cabinet with acrank arm, g, and pin, g,

which, pin is adapted to be engaged by the lever,'l*, to rock 'shaft, G, in one direction, while a spring 9 tends to rotate shaft, G, in

- the. opposite direction. Inside the cabinet,

A, theshaft, Gr, carries an electrical switch A serves to register the number of prints which have been taken from the respective negatives. The pointer, 2, is actuated by means of a ratchet wheel, J, within the cabinet, and fixed to the stem of pointer, 2', which ratchet wheel is moved forward one space at each movement of rock shaft, G, by means of a pawl, J, carried by rock shaft, G, the

wheel J being prevented from moving backward by a pawl J In operation, the cabinet, A, being located in a dark room, or room having a subdued, or ruby light, the switches, C, are adjusted to close the circuits of such lights, B, as may be required by the character of the particular negative to be treated. The sensitized paper is placed with the negative, in the printing frame, while the printing frame rests over panel, a The rinting frame is then secured in the opening, A. The operator then grasps lever, 1 and moves it to the left, over dial J", to the point on the dial indicating the esired length of exposure to be given the rint, causing disk, 6, to slip on gear, 01 i s soon as lever, F, is moved, the spring, 9 rocks shaft, G, causing switch lever, H, to close the circuit through the lights, B, at the contacts, it, h. The movements of themotor, D, through gears, 01, to d, and friction, e, slowly return the lever, F, to the normal position from which is was moved by the operator, When lever, F,-contacts with pin, 9, shaft, G, is rocked, thereby, in the opposite direction, breaking the circuit through the lights, B whereupon the printing frame is detached, and a fresh sheet of sensitized paper introduced. When a suflicient number of prints from one negative have been obtained, the operator turns pointer, z', by hand, to the zero position.

W e prerera bl y provide a plurality of Wmdows, A, and duplicate sets ofrnechanism to control the lights thereof, said rilup'licate' 'v mechanisms being geared to and pperated in common by motor, D, while the slip of. disks,

6, permit both train of gears to run with the motor.

\Ve provide a central partitioma, in the upright portion of cabinet, A. We also prefer to hinge the sections throu h which windows, A, are pierced, so as to orm doors, a", a which permits said doors to be opened to give access to the lights and to adjust the panels, a

l In'the modification, F ig.- 6, the shaft of motor, J carries worms, in, is, at opposite ends. Sa1d worms mesh with worm wheels,

leak on shaft, E, which worm wheels correspond to gears, d, of Figs. 1 and2, and are of such ratio relativeto the worms, as to make one rev'olution per'minute. Motion is transmitted from the wormwheels to the shafts, E, through friction clutches, as illustrated in Fig.1.

The mechanism herein illustrated and described is capable of considerable modifica-v cure separate spheres of illumination and.

adapted when all in use to illuminate the face of a negative in the printing frame un1- formly over its whole surface.

2. in a mechanism of the character indi-.

cated, a cabinet having an opening to. receive a printing frame, a series of independent lights each having a shade to intercept a portion of its rays to secure separate and overlapping spheres of illumination and adapted when all in use to illuminate the face of a negative in the printing frame uniformly over its whole surface, and means to separately control said lights so as to vary the intensity of illumination on difierent areas of the negative face! 3. In a mechanism of the character indicated, a cabinet having an openingto receive a printing frame, a series of independent lights to illuminate difierent sections of a ne ative carried by said printing frame, said ights being arranged in separate coinpartments-and having separate and overlapping spheres of illumination, and means to separately control said lights so as to vary the intensity of illumination on different areas of the face of a negative in the printing frame.

4. In a mechanism of the character indicated, a support to receive a printing frame, a series of lights arranged in front of said rinting frame, said lights having shades to intercept portien of rays of each light throu hsaid lightsl i I '7. na mechanism of-the character indi-' to create independent and overlapping spheres of illumination, and means to sep arately control said lights to vary the intensity of illumination on dillerent areas of theface of saidprintin frame- 5. In a mechanism 0 the character indicated, a support to receive a printing frame, a series of electric lights arranged -in front of said printing frame, said lights having shades to intercept a portion ofthe rays of each light tov create independent and overlapping spheres of illumination and independently controlled circuits and mechanism actuated by the operator to establish a circuit through the lights,- and to automatically open circuits through the" lights after the lapse of a predetermined period of time.

6. Ina mechanism of the character indicated,,a printing frame support, a series of. independent electric lights arranged in front of a printing frame, carried by said support, said lights being arranged in parallel circuit and having independent controlling switches,

'a switch common to the circuit of all the lights adapted to be closed by the operator- 'and to be automatically opened after the lapse of a predetermined len h of time, and mechanism moving at a su stantially uniform rate of speed to automatically open said common switch to break the circuit cated in combination with a printing frame switclies, an electric motor, a

van electrical switch common to the circuits of all of said electric lights.

8. In a mechanism of the character indicated a printing frame support, an electric light arranged to illuminate a printing frame carried by said support, an'electric motor, a clutch comprising a positively driven member receivin motion from said motor, anda member a apted to slide upon said positively driven member, a

said sliding clutch member, a pointer on said shaft, a dial over which said'pointer isadapted tojtravel, a rock vshaft adapted to be rocked by the motion of said pointer, an electrical switch controllingthe circuit of said electric light actuated by said rock ointer shaft adapted to be intermittently driven by shaft, and a pointer actuated 'by the movements of said rock shaft and ada ted to indicate the number of prints pr need,

9.. In a mechanism'of the character indicated, a cabinet comprising an upright section having a series of electric lights arranged in separate com artments, to have overlapping spheres of i lumination, a door in front of said lights, a ground glass detacha-bly carried by said door, an opening in said door infront of said panel to receive "a printing frame.

1O. In a mechanism" of the character indicated a cabinet comprising an upright section having a series of electric lights arran ed in a vertical plane and each provided with a shade to intercept a portion of the rays and create separate and overlapping spheres of illumination, a vertical door 1n front of said lights, a ground glass panel detachably carried by said door, an opening in V i said door in front of said panel to receive a printing frame, a table section having a transparent panel, and means for illumi-v nating the compartment beneath said table. I In testimony whereof, We have hereunto afixed our signatures, in the presence of two itnesses.

' WlLLlEAli l B. CONAW'AY.

CARROLL L. STEVENS. Witnesses:

Acorns :MCCORMACK, (3. .VI', lldrnns.

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