US1331966A

US1331966A - Lithograph ruling-machine

Info

Publication number: US1331966A
Application number: US221270A
Authority: US
Inventors: Guy H Phinney; Emil A Pophal
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-03-08
Filing date: 1918-03-08
Publication date: 1920-02-24
Anticipated expiration: 1937-02-24

Description

G. H. PHINNEY AND E- A. POPHAL.

LITHOGRAPH RULING MACHINE.

APPLICATION FILED MAR. a. 1918. I Patented Feb. 24,1920. Q; '2 wens-4mm I Q F v :QI? P I9 9 $3. m 3: M1 I v M E Q 5 w QB/ x S .w m I 1 I H. I N I Q I .I H I 1 mm 8 Q I \e w x so 5 G. H. PHINNEY AND E. A. POPHAL.

LITHOGRAPH RULING MACHINE.

APPLICATION. FILED MAR-8.1918.

Patented Feb. 24, 1920.

2 SHEETS-SHEET 2- any. H. premature EMILA. :PQPKH L, or s1. PAUL, MrnNEsoTA.

rr'rnoemrn' norms-mar time.

To aZLw/wm-itmay concern:- I

Be-it known that we, GUY 'PHINNEY and EMIL A. POP-HAL, citizens of the United States residing at: St. Paul, in the'county of Ramsey and State of Minnesota,...have invented anew and useful Lithograph Ruling-Machine, of which the following is a specification. a. Ourinvention relates to. lithograph ruling machines,1andj the object isto i provide a highly efficient improved machine of said kind, aswill appear from the following description and claims and from the accompanying drawing in which- .aFigu're -1-is a-top or plan view of the improved'machine. Fig. 2 is an enlarged sec tion on the line 2- -2 of Fig. 1. Fig. 3 is a detail side view of the arch shown in Fig. 2. Fig. 4 is a left side view of theleaning pawl shown in Fig. 3. Fig; 5 is a front side elevation-'of'the machine with a small portion cut away on the line 5-5 in Fig. 1 with some parts omitted as they are clearly shown in Fig. 6. Fig. 6 is a sectionon the line 66 in Fig. 1 .on an enlarged scale and with a, lithographic stone added.

' Referring to the'drawings, by reference numerals, 1 designates a work bench or table upon which the lithographer places a stone 2 coated with wax in which he produces a'series of parallel lines preparatory to etching the stone by the usual process. 3 is the stylus or ruling tool producing the lines. We, will now describe the machine by which said'ruling point 3 is operated, and then point out, especially in the appended claims, how in-uchof the machine we consider our. invention.

Supported upon the-bench- 1' is a main frame 4, havinga longitudinal upward rib 5'wh-ich guides a carriage 6 that is slidably mounted upon the frame, andin earlier constructed machines is moved by hand back and forth on the frame.

I 11;; our improved machine after all parts The movement being limited by movable clamps secured on Specification of Letteis Patent. 7 PatfltdFgb. 24, 1920.

Application filed March s, 1918. Serial No. 221,270.

are, set. and regulated for a given johall movements of the ruling tool and even; the v lengthening and shortening of the. ruled lines are. produced automatically and thereby.much faster and more, accurately than when produced by manual operations. 1

' The carriage 6is reciprocated by ascrew Sthreaded in a block 10'and journaled in bearings11, 12, 13,; the latter two bearings being formed on; a'plate 14 secured on the main frame and having also a bearing 1 in which and in a bearing 16 another screw 17;i-s; slidably but not rotatably mounted. v

In the-present illustration rotation isprevented by' a. feather key 16 fixed in the. shaft and slidable in a key-way in the; bearingblfi. .he screw 9 is provided with two v1006a "l0 pulleys 18, 19 and between them with. a fixed pulley 20. The latter is driven alternately by a straight belt 21 and a crosszbelh 22 from pulleys 23- which are fixed on the shaft 24 of an electric motor25. The wir.- ing 26 of said motor is controlled by two.

switches

27 and 28.

One end of the screw 17 carries two belt shifters 29, 30, fOrfthe' straight belt and the cross belt respectively. And upon the screw 17 are threaded two disks 31, 32, each of which is provided'with a seriesof radial grooves 33. Fixed on thecarriage are two arches 34: and 35, each' of which carries ,two'pivoted

pawls

36, 37, adapted to be held bygravity at an incline so as to engage the grooves 33 and thereby impart a partial turning to the. disk 31 or 32 or both of themii'n, either direction, one pawl of each arch being :place'din active position, the other being held upright and idle by a pin 38. (see'Fig; tempo-' rarily inserted in holes in the pawl and the. arch: e

By the mechanism just described it is ob vious that the length of the-lines produced i ing process this is accomplished by leaving such pawl on each arch in active position as will turn the disks so as to move them away or toward each other. And if the -rul-- ing is to have the lines gradually extended 7 gradually displaced toward one end of the machine, the requisite pawls are placed in active positions to cause both disks to rotate in'the same direction and thus move toward the same end of the machine or belt shifti-ng rod 17 thereof.

The threaded block 19 is slidable upon the carriage proper but is pivoted at 39 to a rack 40, whose teeth 41 mesh with toothed segment 42 of a lever 43 which is Ournaled on the transverse feed screw 7 and by a stud 44is connected to a lever 45 which is also journaled on the forward extending end of the screw 7. The stud or pin 44 extends through a segmental slot 46in the usual 1 dial 47 ofsuch a device-that is, the reciprocated rack 41 oscillates the toothed segment 42 of the lever 43, and thereby the stud 44," and the latter operates the pawl 49,.

which is carried by the stud and rotates the ratchet wl1eel 48; and thus turns the screw 7 and thereby feeds the tool head 8 laterally said feedingv being thus automatically caused by the actionof the main feed screw 9 upon the partly slidable block 10 and its rack 41, the latter acting on the toothed se ment 42.

ixed on the screw 7 is a ratchet wheel 48, which is rotated by a spring-pressed pawl 49 mounted on the stud 44. 50 is a retaining pawl engaging the ratchet 48. It is mounted on an arm 51 extending from a clamp 52 which is adjustably secured by a screw 53 upon the edge of the dial'47. Said clamp also carries anarm 54 which serves to limit the stroke of the lever 45 while an arm 55, fixed on the dial limits the stroke of said lever in the'opposite direction. The pawl50 is held in engagement by a spring 56 whih "s adjustably held upon the arm 54 by a screw 58 59 is the usual crank fixed on the feed screw 7 for turning it by hand where the machine is operated by hand power, but in our improved machine the crank 59 is only used to bring the ruling tool 3 to the starting line on the stone, all other feeding is done automatically by the mechanisms just described.

a The distance between the ruled lines is regulated by adjustment of the clamp 52 along the upper edge of the dial, whereby the stroke of the lever 45 is shortened or lengthened between the arms 54 and 55 stopping it. For whenever such stopping takes place the rack 41"and block 10 stop moving rela-' And if the lines are toretain their length but they are to be.

fixed to a sleeve 57 Y and the latter is or-35 to press against the-disks 31 or32 and thereby shift the belts and reverse the movement of the carriage, with or without operation of the pawls mounted on the arches.

One end of the rack 40 is offset inward of the main frame and pivoted at 59 to a link 60, which link is in turn pivoted at 61to a rocker arm 62 fixed on a bail 63. Said bail has its ends journaled in the carriage 6.

This bail'when operated by the pulling I movement of the rack 40, whereby the carriage is returned to its starting point, is raised upwardas shown in Fig. 6, thereby actingon a lever 64, which is pivoted at 65 to the carriage and by its lower end engages a fiat portion 66 of the regular beam lever 67, which is fulcrumed at 68 to the carriage, carries the ruling tool 3 in it arm 69 and has its other arm 70 provided with an ad justable weight 71, by which to regulate the pressure on the stylus'3 that is caused by the weight of the arm holding it, or by an 7 extra weight (not shown) placed upon said arm. The bail 63 then causes the stylus to rise during its return to the starting point. 7 2 is a spring for throwing the lever 64 into idle position every time the bail 63 is thrown into idle position from the pushing of the rack40 which must take place before the belts can be shifted'so as to start'the next active movement of the carriage- Slidably mounted in parts 6, 6 of the carriage is a rod 73, upon which is a collar 74 held by a set screw 75. The rear end of said rod is adapted to hold a switch button 27 of the electric switch 27 depressed against the resistance of a spring'27 of the SWltCh. As-long as said button is pressed down the switch is closed and the motor will run the machine, provided the switch 28 is also closed. The collar 74 is set to the desired place on the rod 73 and the operator may leave the machine to run without further attention, and when the desired piece of work or operation on the stone is completed the arm 6 being fixed on the carriage and thus moving laterally with it will be moved against the collar 74 and pull the rod 73 away from the button 27, and as the latter is raised by the spring 27 the switch is thrown open and the motor and machine stopped, until started again by the operator.

The machine being somewhat complex I will here recapitulate its operation as follows: The stone to be used as a cut or plate for printing purposes is brushed over with a coat of wax and placed on the work bench supporting the machine, at a-suitable place somewhere between the legs of the machine so the needle 3 may move over its surface and make or rule grooves through the wax.

'Acid is then applied to act through said apdnehe fwax'sis vwasherawa fkiy aitpen tine and theston'e in longitudinal direction of the main frame 4l5, itbeing so moved by the combined rack and'connectin grod- 10%1 and the threaded nut or block 10. Said nut being moved by the main screw 9, which is threaded in said nut and is alternately rotated in opposite directions by its two tight pulleys 18, 19 and the

belts

21 and 22; said belts being shifted by the elements 29,30 and the nonrotatable screw rod 17 the latter being alternately pushed and pulled as the parts 34 and 35 of the main carriage are brought against the disks 31 and 32 threaded on the screw rod 17. The length of the lines made by the needle depends on the hand-regulated distance between the disks; and said distance may also be varied automatically by removing the locking pins, like 38 in Fig.

3, so the dogs 37 (one or more of them) may lean enough by their weight to engage the grooves in the disks and by the gradual rotating of the disks will cause them to move along the screw in any desired direction.

While this ruling movement is imparted to the needle, the needle is also fed gradually across the main frame so as to make several parallel lines in the wax. This feeding is caused by the movement of the toolcarrying head or small carriage 8,- the same being gradually moved by the screw 7, which is rotated some every time the main carriage moves the needle back (to the right) to start a new line in the wax, this because each time the nut 10 pushes or pulls on the rack 40-41 the rack oscillates the toothed segment l2 by which the screw 7 is rotated through the levers, arms, dogs and ratchet wheel 18, as fully described.

lVhile this is all going on, the rack rod l041 also. by a pushing action rocks the shaft 63 so it acts on the lever 64 to raise the needle during its backward stroke; when the rack is pulled again it brings the shaft 63 to release its pressure on the lever 64, and allows the latter to be swung into normal position by the spring 72,,and thus to set the needle lever 69 at liberty to sink the needle into the wax and make the next line therein.

In this manner the machine, after being properly regulated and started, may run without attention until the stone is finished; and even then there can be no damage done, since the arm 6, fixed on the small carriage 8, will then be moved against the collar 74, which is'so placed on the rod 73 that when the stone is ruled said rod will be pulled by the collar and thereby open the switch 27*- 27" and thereby stop the motor 25, by which the entire machine is operated automatically WVh' at we claim Sissy n magma ma;swa s-aria;awardsand 'h' ft' u v .-a wt:

combination vv ith 'a base, of an' elongated horizontal skeleton frame mounted' oni'the base, carriage-mounted to slide m; the frame in longitudinal direction thereof, a tool carrying head guided to slide on the carriage in transverse direction of the main frame, a feed screw mounted on the carriage and threaded in a portion of the tool head so as to move it, a beam lever mounted on the tool head and having at onearm an adjustable weight, the other arm being heavier and provided with a ruling tool, a feed screw mounted in longitudinal direction upon the frame, a tight pulley and two loose pulleys on one end of said screw, a driving shaft, two pulleys fixed on said driving shaft, a straight belt and a cross belt from the latter pulleys on to the pulleys on the screw; means operated by the carriage for shifting the two 1 belts, alternately onto the tight pulley, a ratchet wheel fixed on the transverse feed screw, two rocker arms journaled on the transverse feed screw and operatively connected, a spring pressed pawl carried by one of said arms andengaging the ratchet wheel, the other arm having a toothed segment, a rack meshing with said segment a block pivoted to the rack and threaded upon the longitudinal feed screw, a bail mounted on the carriage and traversing the main frame, operative connection between the rack and the bail to oscillate the latter, means carried by the tool head and arranged to be actuated by'the bail and when so actuated to act on the lever holding theruling tool and cause the rising of the tool during each return stroke of the carriage, means limiting and varying the stroke of the arm carrying the ratchet pawl, and a pawl to prevent acci dental reverse turning of the ratchet wheel. 2. The structure specified in claim 1 with the further improvement that the belt shifting means comprises a non-rotatable threaded rod mounted parallel to the main feed screw and having a longitudinal play in its bearings, two belt engaging elements fixed on said rod and engaged one with each belt, two disks centrallythreaded-upon said rod one beyond each end of the carriage and having their adjoining faces provided with a series of radial grooves, two arches fixed on the carriage and straddling the threaded rod, two pawls mounted on each arch, means for supporting each pawl in an upright idle position or in an inclined active position as may be desired, said pawls when in the inclined position adapted to engage the radial grooves and rotate the disk and said arches adapted to be carried by the carriage against the disks and thereby impart sliding movea Thestructure specified in c1aim2wi th the further improvement that the driving shaft is operated b anlelectric motor and wiring with a switc controlling the electric current, a slidable rod mountedon the carriage for holding said switch closed, an

adjustable collar on the rod, and an arm on the tool head for engaging said collar and therebyautomatically open the switch when the tool hasruled the predetermined 10 amount of surface. v a I V flIn testimony whereof we afiix our signa tures. 1

s GUY H. PHINNEY..

EMIL A. POPHAL.