US1262723A - Photographic-printing apparatus. - Google Patents

Description

H. M. WEBSTERI PHOTOGRAPHIC PRINTING APPARATUS.

APPLICATION EILED MAY 19, 1916. 1,262,723. Patented Apr. 16, 1918.

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fizz/622 for pig??? H. M. WEBSTER.

PHOTOGRAPHIC PRlNTlNG APPARATUS.

APPLICATION FILED MAY 19' 19I6.

Patented Apr. 16, 1918.

3 SHEETS-SHEET 2. 75%

H. M- WEBSTER.

PHOTOGRAPHIC PRINTING APPARATUS. APPUCATION FILED MAY 19, 1916.

1,262,723. Patented Apr. 16, 1918.

3 SHEETS-SHEET 5/ /i m 59 172944 55 J 9/9 9 A? HOWARD M. WEBSTER, or CHICAGO, ILLINOIS.

PHOTOGRAPHIC-PRINTING APPARATUS.

Specification of Letters Iatent. Patented Apr. 16, 1918.

Application filed May 19, 1916. Serial No. 98,490.

To all whom it may concern:

Be it known that I, HOWARD M. WEBSTER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Photogra hic-Printing Apparatus, of which the f0 lowing is a specification. I

This invention relates to an apparatps for preparing photographic prints by artificial light and has for its principal object the provision of an apparatus of simple and relatively inexpensive construction, capable of rapid operation to produce photographic prints.

A further object of my invention is the provision in an apparatus of the above-described character of means for automatically shutting off the light after a predetermined interval.

Further objects and advantages of my invention will be apparent as it is better understood by reference to the following specification when read in connection with the accompanying drawing, illustrating the preferred embodiment thereof, in which- Figure 1 is a plan view of an apparatus according to my invention;

Fi 2 is a Vertical section on the line 22 of FIg. 1;

Fig. 3 is a side elevation of the structure illustrated in Fig. 1;

Fig. 4 is a side elevation of a portion of the structure illustrating. the printing position of the parts;

Fig. 5 is an enlarged detail in elevation of a portion of the time-controlling mechanism;

Fig. 6 is a vertical section through a por tion of the printing mechanism;

F i 7 is a vertical section on the line 7-7 of Flg. 5; and

Fig. 8 is a vertical section on the line 88 riage 7 is slidably mounted on the rods to move longitudinally of the table 2. A shaft 8,'extend1ng transversely of the table 2, is slidably mounted in slots 9 in the opposite sides of the carriage 7 and is resiliently drawn toward the table 2 by the springs 10. A roller 11 is mounted on the shaft 8 and connected thereto by a spiral spring 12 (Fig.

6) disposed within the roller 11. One edgev of a blanket 13 is secured to the roller 11, the opposite end of the blanket being secured in any suitable manner to the surface of the table 2. A clamping member 14 is supported by links 16 which connect a shaft 17 mounted in brackets 18 on the clamping member 14 with a transverse member 15 of the carriage 7. A spring 19, connected to the shaft 17 and to a transverse member 20 of the carriage 7, normally raises the clamping member 14 from engagementwith the surface of the table 2. Members 21 are supported on either side of the clamping member 14 and provided with laterally extending lugs 22. Upstanding members 23 secured t0 the table 2 are adapted to be engaged in the lugs 22 when the carriage 7 is moved to the right, viewing Fig. 3, to cause the clamping, member '14 to approach the surface of the table 2.

In the operation of the mechanism the negative and the photographic paper are arranged over a glass inset 24 in the top of the table 2 and the "carriage 7 is moved to the right, viewing Fig. 1,. whereupon the blanket 13 is unrolled from the roller 11 above the negative and photographic paper and when the carriage 7 reaches the end of its movement, as indicated in Fig. 4, the clamping member 14 is operated, as previously stated, to clamp the work in position. A member 25 is arranged to slide transversely of the table 2 and is provided at its extremities with dogs 26 disposed in the path of the members 27 depending from the carriage 7. When the carriage reaches the position indicated in Fig. 4 the members 27 engage the dogs 26 to lock the carriage 7 in printing position. about the rods 5, provide resilient bufiers to prevent injury of the carriage 7 by careless treatment.

To-control the electric circuit leading to the lamps 3 I provide a member 29 adjustably mounted by means of screws 30 on the carriage 7 and having a laterally extending Springs 28, disposed portion 31 adapted to engage a bell-crank V a pin 35 on the bell-crank lever 32. The

other arm of the bell-crank lever 34 is connected to a contact member 36 slidablysupported on a suitable insulating base 37 and provided with contacts 38 adapted to cooperate with contact members 39 resiliently mounted on the base 37. The contacts 38 and contact members 39 are connected b suitable conductors to a fuse box 40.

.The shaft 44 of the manually operable switch 41 controls the circuit in which the lamp 4 is arran ed. A constant speed motor 42 is electrica 1y connected by suitable conductors to a circuit controlled by a manually operable switch 43. motor 42 is provided with'a worm 45 engaging a suitable worm gear 46 arranged within a housing 47 and secured to a shaft 48 mounted in suitable bearing in the housin 47. The'shaft 48 is rovided at its end with a friction disk 49. loosely mounted on the stub shaft 50, mounted in a bracket 51 secured to the side of the casing-2, is a spool 52 provided with friction springs 53 adapted to engage the a friction disk 49. The bracket 51 is provided with a cam face 54 and a slotted member 55 provided with a corresponding cam face is mounted on the stub shaft and connected Joy a link 56 to one end of the bell-crank lever 32.

Obviously when the bell-crank lever 32 is actuated in the manner previously described the member will force the spool 52 to the left, viewing Fig. 5, to engage the friction disk 49 which is rotated at a constant speed by the motor 42. Connected to the s ool 52 are a pair of flexible members 57 an 58 extending upwardly and over pulleys 59 and 60 mounted in the laterall extending br ack ets 61 and .62 secured to t e side of the easing 1. The end of the flexible member 57 is connected to a weight 63 which normally rests on a support 64, the weight 63 being slidably dis osed upon a vertical rod 65. An ad] ustablb stop member 66 is mounted on the rod in the path of the weight 63 which, as will be apparent from the preceding description, is lifted when the spool 52 is rotated. The rod 65 is slidable in the support 64 and is connected at its u per end to a lever 67 pivotally mounted in rackets68 secured to the side ofthe table 2. An arm 69 of the lever 67 is dis osed through a suitable opening in one o' the dogs 26 so that when the rod 65 is lifted by engagement of the-weight 63 with the adjustable stop 66 the dogs 26 are moved to release the members 27 so that the carriage 7 may be re.

turned to its normal position under the ectu-, ation of the springs 28 and 12.

The flexible member 58 is connected at its free end to a member 70 which is slidably mounted on the vertical rod 71 and a sp 72 is dis osed about the rod 71 above the member '70. The purpose of the spring 72 and the member 70 is to resiliently sto the rotation of the spool 52 when the weig t 63 returns to its normal position after the carriage 7 and the bell-crank lever 32 have been released.

The mode of operation of my invention will be readily understood from the following brief description thereof. The switches 41 and 43 being turned to position to operate the motor 42 and allow current to pass to the lamp 4, the negative and photographic paper are disposed upon the glass inset 24 and the carria 7 .is moved to the left, viewing Fig. 1, so t at the blanket 13 is disposed above the hotographic aper and the clampin mem er 14 is moved to the position indicated in Fig. 6. As .the carriage 7 reaches the limit of its travel the contacts 38 are moved into engagement with the cont: ct members 39 to close the circuit to the lamps 3. Simultaneously the springs 53 are moved into ongagement with the friction disk 49 and the s 001 52 commences to rotate and wind up t e flexible member 57 to raise the weight 63. When the weight 63 engages the sto 66,

- which is previously adjusted in acco ance with the time required to accomplish the printing operation, the rod 65 is moved vertically to operate the lever 67 and free the members 27 on the carriage 7 from the do 26, whereupon the carriage 7 returns to its normal position and the s rings 53 are released from the friction disks 49, the spool 52 rotating in the reverse direction as the weight 63 descends. The printing paper is then removed and a fresh sheet substituted after which the o eration is repeated.

' It will be readily appreciated from the foregoing that I have perfected a photographic printing machine which is simple in construction, automatic in action and is adapted to produce photogra with extreme rapidity,. the on necessary on the part of the operator being to replace the sheets of photographic printing paper and move the carriage 7 to printmg position.

am aware that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and S00 e of the invention or sacrificing any of 1ts material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

. 1. In a photographic printing machine, the combination of a casing, electric lamps within said casing, a tran parent top on hic prints y attention 161 said casing above said lamps, a carriage slidably movable to position above said transparent top, means entirely supported on said carriage and bodily movable relatively thereto when the carriage is positioned above said transparent top to clamp for releasing said carriage after a prede r termined interval.

3. In a photographic printing machine, the combination of a casing, electric lamps within said casing, a transparent top on'sa'id casing above said lamps, a carriage movable to position above said transparent top, a roller on said carriage, a blanket connected to said roller and to the top of said casing, means for rotating said roller to wind the blanket thereon as said carriage moves in one direction and to allow the blanket to unroll as the carriage is moved in the opposite direction, means entirely supported on said carriage and bodily movable conjointly f' therewith and relatively thereto to automatically clamp the blanket and work on said transparent top, means actuated by the movement of said carriage to close a circuit to said lamps,- and means for automatically breaking said circuit after a predetermined interval.

4. In a photographic printing machine, the combination of a casing, electric lamps within said casing, a transparent top on said casing above said lamps a carriage slidably movable to position above said transparent top, a roller on said carriage, a blanket connected to said roller and to the to of said casing, means for rotating said ro ler to wind the blanket thereon as said carriage moves in one direction and to allow the blanket to unroll as the carriage moves in the opposite direction, and a clamping member bodily movable conjointly with an relatively to said carriage and adapted to engage said blanket only when it is unrolle Y r 4 5. In a photographic printing machine, thecombination of a casing, electric lamps within said casing, a, transparent top .on-

said casing above said'lampsl, a carriage movable to position .aboutsaid transparent top, means entirely'sup riage and bodily mova orted on said care relatively thereto when said carriage is positioned above said transparent top to clamp the work on said transparent top, a blanket, means on said carriage for automatically positioning said blanket between the work and clamping means, means operated by the movement of said carriage for closing a circuit to said lamps, and means for automatically breaking said circuit after a predetermined intervaL- 6. In a photographic printing machine, the combination of a casing, electric lamps within said casing, a transparent top on said casing above said lamps, a carriage movable to position above said transparent top, a roller on said carriage, a blanket connected to said roller and to the top of said casing, means for rotating said roller to wind the blanket thereon as said carriage moves in one direction and to allow the blanket to unroll as the carriage moves in the opposite direction, and means entirely supported on said carriage and bodily movable relatively thereto when said carriage is positioned above said'transparent top to automatically clamp the blanket and work on said transparent top.

7. In a photographic printing machine, the combination of-a casing, electric lamps within said casing, a transparent top on said casing above said lamps, a carriage movable to position above said transparent top, latches for maintaining said carriage in the latter position, a roller on said carriage, a blanket connected to said roller and to the top of said casing, means for rotating said roller to wind the blanket thereon as said carriage moves in one direction and to al low the blanket to unroll as the carriage moves in the opposite direction, means actu ated by the movement of said carriage for closing a circuit to said lamps, and means 9. In a photographic printing machine, thecombination of a casing, electric lamps within said casing, a transparent top'on said casing above said lamps, a carriage movable to osition above said lamps, spring-control ed means on said carriage to cover the work, means for retaining said carriage in said position, means automatically actuated when said carriage is moved to said osition to close a circuit to said lamps, an means for automatically releasing said carriage and breaking said circuit after a predeterprinting position, means automatically actuated when said carriage is moved to printing position to close the circuit to said lam and means for automatically releasin said carriage and breakin said circuit a r a predetermined interva including a continuously operable motor, mechanism connected to said retaining means and means for intermittently connecting said motor to said mechanism.

HOWARD M. WEBSTER. Witnesses:

WM. 0. BELT, M. A. KIDDIE.

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