US1114116A

US1114116A - Photographic-printing apparatus.

Info

Publication number: US1114116A
Application number: US78957913A
Authority: US
Inventors: Henry C Coffman; Benjamin F Van Horne
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-09-12
Filing date: 1913-09-12
Publication date: 1914-10-20
Anticipated expiration: 1931-10-20

Description

H. G. GOPFMAN &B. F. VAN HORNE.

PHOTOGRAPHIG PRINTING APPARATUS. APPLICATION FILED SEPT. 12, 1913.

wmomo Patented Oct. 20, 1914,

3 SHEETS SEEET 1.

J13 die I] I1 o 4 o o 4 o ---fit--;

q o o o t o a 17, a'o/f v M 12 1]? Vbrliwna 'IHE NORRIS PETERS CO., PHOTO-LITH-L. WASHINGTON. D. L.

'H. 0. GOFFM'AN & B. P. VAN HORNE. PHOTOGRAPHIO PRINTING APPARATUS.

APPLICATION FILED SEPT. 12, 1913.

1 1 1 4, 1 1 6. v Patented 'Oct. 20, 1914,

3 SHEETS-SHEET 2 THE NORRIS FETERS c0. PHOT0LITHO,.WASHIND1Y)N D. C.

- smwanrorri fl HENRY doorrmlm AND BENJAMIN r. VAN 110mm, or GARY, INDIANA.

PHCTOGBAPHIC-PRINTING APPARATUS.

Specification of Letters Patent. Application filed September 12, 1913. Serial No. 789,579.

Patented Oct. 20, 1914.

Y To all whom it may concern.

Be it known that we, HENRY G. CorFMAN and BENJAMIN F. VAN HORNE, citizens of the United States, residing at Gary, in the county of Lake, State of Indiana, have invented certain new and useful Improvements in Photographic-Printing Apparatus and we do hereby declare the following to be a full, clear, and exact description of the inven- -tion,such as will enable others skilled in the art to which it appertains to make and use the same. i

This invention relates to photographic printing apparatus and particularly to'that type in which an artificial light is employed to effect theprinting."

l l Th object of he. invention resides in the provision'of an apparatus of the character named in which the artificial lights are controlled automatically by opening and closing the hinged printing frame back, said lights being turnedon when the negative and sensi- --tized paper have been secured under the back andextinguished I. when the back is moved to open position to permit of the removal of the exposed paper.

' A furtherobject of the invention resides in the provision of an apparatus; of the character referred :to which includes means for elevating one end of the negative mechanically. to permitof the convenient manpaper should be exposed to the artificial lights to effect the proper printing.

" Withthe above and other ob ects in v1ew the invention consists in the "details of con, ,struction and in the arrangement and combination of parts to be hereinafter more I fully described and particularly pointed out in the appended claims.

' In describing the inventiongin'detail reference will be had to the accompanying ,j drawings wherein like characters of referencedenote corresponding parts in thes eral views,-and 1n Wh1Ch-- disposed. in securing relation .to a negative.

Fig. 2 a section on the line 22 of Fig. 1 with the hinged back of the printing frame partly open. Fig. 3a plan view of the apparatus with the top and false bottom thereof removed. Fig. 4 a bottom view of the top ppf the apparatus with the printing frame disposed therein. Fig. 5 a, section on the line 55 of Fig'4. Fig. 6 a transverse section through'the apparatus. Fig. 7 a secment of the negative lifting device. 7

Referring to the drawings, the apparatus is shownas comprising a box or casing A which includes

side'members

15 and 16, a front member lfl *a rear member 18,"a bottom 19, a false'bottom'20 and a removable 'top 21. The rear member 18- isprovided centrally adjacent the bottom 19-with an 4 opening 22 andmountedv onthe inner face of therear member .18"at each side of the opening 22 are blocks 23 which support a strip of insulation 24. and this strip in turn carries

electrical contacts

25 and 26 which each corner' of the "casing'is a block 28 and these blocks serve to support the false bot- Adapted to be detachably engaged with the electrical contacts'25 and 26 when the door 27 isin open position is anelectrical' connection 29' which has secured thereto'

wires

30 and 31 leading from a suitable electrical source. Leading from the contact 25" is a wire 32 which is connected to a pivoted knife 'side' member 15. Leading "from" the conpivoted knife arm mounted upon the inner side-"of the side member 15 inspa'ced relationto the arm- 33 and for movement in a plane 'parallel'tothe plane of movement of said arm 33. Connected in multiple be? tween the

wires

32 and 34 is a plurality of electric lanipsockets' 86. These socketsare respectively through openings 37 in the false bottom 20. fEach of the sockets 36 carries a lamp 38 the globe of which is of any detion on the line 77' of Fig.3. Fig. 8 a section onthe line 88 of Fig. 4. Fig. '9, a section on the line.99 of Fig. 4, andFig. F 10a detail perspective view of the sear ele project into the opening 22. This opening. 22 isadapted to be closed by a door 27 suitablyhinged to the outer side of the rear .member' 18. Mountedupon the bottom 19' at. 1

tom 20 in spaced relation to the bottom 19.

so I

arm-33 mounted upon the inner side of the 1 tact 26 is a wirei34 which is connected to a mounted'upon the bottom 19 and project I sired color,fiit being preferred however to use a lamp with a ,red globe in the socket am LJ nearest the rear member 18 and lamps with clear globes in the remaining sockets.

Depending from the top 21 is a knife contact 39 which receives the knife arm 33. This top 21 is provided with an opening 40 for the reception of a printing frame B. tarried by the top 21 and extending into the opening 10 is a knife contact 11 which receives the knife arm Mounted in the rear end of the top 21 are spaced conducting screws 42 and d3. The screws project slightly into the printing frame seat at their forward ends and said forward ends are provided respectively with recesses 44c. The

screw -12 is connected at its inner end to the knife contact 39 by means of a wire 4-5, while the inner end of the screw a3 is connected to the knife contact 11 by a wire 46.

The printing frame B includes the usual side members -17 and #18, rear member d9 and front member 50, said members being provided along their inner edge with a ledge 51 for supporting a negative. Hinged to the rear member d9 is the usual printing frame back which includes an inner member 52 and an outer member 53, the latter being hingedly connected to the free edge of the inner member 52. Mounted in the rear member 49 of the printing frame are spaced screw conductors 51- the inner ends of which engage in the recesses 4A of the conducting screws .2 and +13 respectively. The outer ends of these conducting screws 54 project slightly over the ledge 51 and are adapted to be engaged by the inner end of respective conducting members 55 mounted in the section of the hinged back when said back is in closed position. The outer end of the conducting members 55 project slightly beyond the free edge of the section 52 and are adapted to be connected by a contact plate 56 mounted on the inner edge of the section 53 of the hinged back, such connection of the contact members 55 by the contact plate 56 occurring when the hinged top is in closed position as will be obvious. By this construction it will be obvious that when the hinged back of the printing frame is in partly open and open position the circuit through the lamps carried by the sockets 36 will be broken and that as soon as the hinged back of the printing frame B is moved to closed position the circuit through said lamps will be closed so as to provide the necessary light to effect the printing of the picture. The period of exposure in the printing operation is determined by the operator and when a sufficient period has elapsed the hinged back of the printing frame is moved to open position and the lights carried by the sockets 36 extinguished.

It is often desirable to turn on the lights carried by the sockets 36 without closing the hinged back of the printing frame for the purpose of allowing the density of a negative to be inspected. In order to accomplish this result there is mounted on the inner side of the side member 15 a U-shaped member 57 disposed in embracing relation to the knife arms 33 and The arms of the Ushaped member 57 are provided respectively with recesses 58 in which are slidably mounted the ends of a bar 59. This bar 59 is provided with a stem 60 which is slidable through an opening 61 in the side member 15. The bar 59 is normally held out of engagement with the

knife arms

33 and 35 by means of a spring (32 which encircles the stem 60 and has one end connected to the member 51 and its other end to the bar 59. The outer end of the stem 60 has mounted thereon a push button 63 disposed on the outer side of the side member 15. By this construction it will be apparent that when the push button 63 is operated to move the stem 60 inwardly of the side member 15 the bar 59 will be brought into engagement with the knife arms 33 and and in this manner the circuit through the lamp sockets 36 will be closed and the lamps carried by said sockets ilhnninated. As soon as pressure is relieved from the push button 63 the spring (32 will shift the bar 59 out of engagement with the

knife arms

33 and 35. In this manner the lights of the apparatus may be illuminated for the purpose of inspecting the density of a negative independent of the closing of the hinged back of the printing frame 13.

Mounted on the under side of the front member 50 of a printing frame is an angle member (31 which includes a depending arm 65 the lower end of which terminates in an an ular portion (36 provided with a perforation 67. This arm 65 is further provided with a slot 72 for a purpose that will presently appear. Slidable in the perforation 67 is a plunger 69 provided on the side thereof adjacent the arm 65 with a notch 71. The plunger 69 is normally held in its uppermost position by a spring 71 and the upper end of said plunger terminates in an angular portion which extends over the ledge 51. Depending from the plate 64: parallel to the arm 65 is a bracket 70 upon which is pivoted a sear 72 working through the slot 72 and adapted to engage the notch 71 to hold the plunger 69 in its lowermost position against the influence of the spring 71. Depending from the plate 6% is a bracket 73 on which is pivoted a two armed lever 74. One end of this lever 7d extends under the end of the sear 72 remote from the arm 65 so that when the opposite end of said sear is depressed the sear 72 will be operated so as to disengage same from the notch 71 and release the plunger 69 to the influence of the spring 71. The end of the lever 7 1 remote from the arm 65 has pivotally connected thereto a stem 75 which I carries a push button 76 movable through i an opening 79 in the front member 50. A

spiral spring 80 is disposed in the opening 79 and encircles the stem 75 and constantly tends to hold the stem 75 elevated as will be obvious. By this construction it will be apparent that when a ne ative is closed in 71. At the termination of this depression of the plunger 69 the sear 7 2 will engage in p i the notch71 and lock the plunger depressed during the printing operation. When it is desired to remove the negative it is only trical conductors I ing, lamps conducting said conductors,

necessary to open the hinged back of the printing frame and then depress the push button 76. This depression of the push button 76 will rock the lever 7 4 and in turn rock. the sear 72 so as to disengage the latter from the notch 71 when the plunger 69 will be elevated under the influence ofthespring 71 so as to liftth'e outer end of the negative to a position where it may be conveniently gripped and removed.

What We claim is t Y 1 In a photographic printing apparatus the combination of a casing having a print- I ing frame receivin opening in its top, elecisposed w1th1n sald casmeans for connecting one end of said conductors with an electrical source, a printing frame seated in the openmg in the top of Copies of this patent may be obtained for said casin a hinged back included in said printing rame, means for connecting the other ends of said conductors o erated by the movement of the hinged bacE to closed position, a slidable plate adapted for movement into engagement with the conductors simultaneously inde endent of the movement of the hinged hack to closed position, spring means normally holdin the plate out of engagement with the con uctors, and means for moving said'plate against the influence of said spring means.

2. Av photographic printing frame comprising a frame body having a negative supporting ledge along its inner edge, a hinged back secured to said frame body for confining a negative upon said ledge, a plunger slidable in the frame body and having a portion thereof overlying the ledge, 4

spring means constantly tending to elevate said plunger to lift a negative thereabove, a sear for locking said plunger depressed, a push button mounted in the frame body, and connections between said push button and said sear whereby the depression of the former will disengage the latter from the plunger and release same to the influence of said spring means. I L In testimony whereof, we afiix our signatures in the presence of two witnesses.

HENRY C. COFFMAN. BENJAMIN F. VAN'HORNE. Witnesses:

RICHARD ELWoon, CHARLES MATTOX.

five cents each, by addressing the Commissioner of Patents, 'Washington, D; 0.