US1009210A

US1009210A - Stereotype-printing-plate-casting apparatus.

Info

Publication number: US1009210A
Application number: US64069611A
Authority: US
Inventors: Henry A Wise Wood
Original assignee: AUTOPLATE Co OF AMERICA
Current assignee: AUTOPLATE Co OF AMERICA
Priority date: 1911-07-26
Filing date: 1911-07-26
Publication date: 1911-11-21
Anticipated expiration: 1928-11-21

Description

v 11. A. W. WOOD. STEREOTYPE'PRINTING PLATE CASTING APPARATUS.

APPLICATION FILED DBO. 5, 1904. RENEWED JULY 26, 1911.

Patentd N0v.21, 1911.

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STEREOTYPE PRINTING PLATE CASTING APPARATUS.

APPLICATION FILED DEC. 5, 1904. RENEWED JULY 26, 1911.

1,000,210. Patented Nov. 21, 1911.

9 SHEETS-SHEET 2.

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H. A. W. WOOD. V STEREOTYPE PRINTING PLATE CASTING APPARATUS. APPLICATION FILED 0120.5, 1904. RENEWED JULY 26, 1911.

1,009,21. Patented Nov 21,1911.

9 BHBETSSHEET 3.

' H. A. W. WOOD.

STBREOTYPB PRINTING PLATE CASTING APPARATUS.

APPLICATION FILED DEC. 5, 1904. RENEWED JULY 26, 1911.

Patented NOV. 21. 1911.

9 SHEETS-SHEET 4.

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, H. A. W. WOOD.

STERBOTYPE PRINTING PLATE CASTING APPARATUS. APPLICATION FILED 11110. 5, 1904. RENEWED JULY 26, 1911.

1,009,210. Patented Nov. 21, 1911.

9 SHEETSSHEET 5.

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v H. A. W. WOOD. STEREOTYPE PRINTING PLATE CASTING APPARATUS.

4 APPLICATION FILED DEC. 5, 1904. RENEWED JULY 26, l ll. 1,009,211 0. Patented Nov.21, 1911.

9 SHEETS-SHEET 6.

H. A W. WOOD.

STBREOTYPEPRINTING PLATE CASTING APPARATUS. APPLICATION FILED DBO. 5, 1904. RENEWED JULY 26, 1911. 1,009,210, Patented N0v.21, 1911.

9 SHEETS-SHEET 7.

WIT/(messes H. A. W. WOOD. I STERBOTYPE PRINTING PLATE GASTING APPARATUS. APYPLIOATIDN FILED-DEG. 5, 1904. RENEWED JULY 26, 1911.

1,009,210, PatentedN0v.21,1911.

9 SHEETSBHEET B.

H. A. W. WOOD. STEREOTYPE PRINTING PLATE CASTING APPARATUS. APPLICATION FILED D3615, 1904. RENEWED JULY 26, 1911.

lQQQQl O. Patented Nov.21, 1911.

9 SHEETS-SHEET 9.

A Willi-(6536 5: W A I ga i l '6. '9? J A UNITED STATES PATENT OFFICE.

HENRY A. WISE WOOD, OI NEW.YORiK, N. Y.,-ASSIGNOR, BY Ill/[ESNE ASSIGNMENTS, TO

r THEIAUTOPLATE com'PANv or AMERI POEATION OF NEW JERSEY.

CA. OF JERSEY CITY, NEW JERSEY, A GOR- s'rEREorYrE-rRm'rme-rm'racnsrme APPARATUS.

\ Specification of Letters Patent. Patented Nov. 21,1911.

Application filed December 5, 1904, Serial No. 235,584. Renewed July Q6, 1911. Serial 'LNo. 640,896.

To all whom it may concern: 7

Be it known that I, HENRY A. WISE WOOD, a citizen of the United States, residing at New York, in the countyof New York and State of New York, have invented a new and useful Stereotype Printing Plate Casting Apparatus, of which the specification.

The object of this invention is to provide an improved apparatus for casting curved stereotype printing-plates.

In my application for patent filed March 12, 1900, Serial No. 8,384, I have shown, de-

scribed and claimed an organized automatic mechanism for this purpose. The same device is shown, described and claimed in English Patent No. 2525-01? 1900.

The object of the present invention is to devise a simple form of such apparatus in which the power to perform the major part of the operations comes from the operator so as to fill the demand for machines which are less expensive and in which this arrangement offsets the decrease in speed 0ccasioned by manual power.

In the present apparatus, I have retained many of the features of said prior invention, but have combined them so that the apparatus can be manipulated to good advantage in the smaller newspaper oflices preferably by one operator, and wherein the machine is so safe-guarded that it is practically impossible for the operator to make mistakes.

The device is shown in the accompanyin eight sheets of drawings, and will be best understood by following said drawings.

Referring to the drawings, Figure 1 is a fragmentary front elevation, the back being omitted. Fig. 1 is a plan of the apparatus. Fig. 2 is a similar view to that shown in Fig. lwith the back .and matrix manipulating mechanism in position. Fig. 3 is an end elevation with parts omitted. Fig. 4 is a sectional view just inside the pump-cam with the operating handle for the back .in place. Fig. 5 is an end elevation from the opposite side partly in section. Figs. 6 and '7 are partial end elevations and a detail View on an enlarged scale illustrating the following is a operation of the mechanism for lifting the cast-plate from the core. Fig. 8 is a partial end elevation illustrating the mechanism for turning and locking the .cylinder or core. Figs. 9 and 10 are fragmentary views illustrating the action of the locking mechanism for the pump-valve. Figs. 11 and 12 are a side and an end elevation illustrating the connections to the pump-valve, and Fig. 13 is a detail view illustrating the locking mechanism for the pump-valve.

Referring to the drawings and in detail, A designates a suitable framing, fitted to slide vertically in which is a segmental back B, cooperating with a core or cylinder C journaled in the framing. The back B carries a matrix holding and manipulating mechanism which is arranged to support and manipulate a flexible matrix M. Theseparts are the'same as described in my previous application for patent and need not be herein particularized at length any more than to say that the operation is such that a semi-cylindrical stereotype-plate is cast alternately on each half of the periphery of the core or cylinder, the space between the core and the segmental back forminga casting chamber, and that the matrix'manipulating mechanism is so arranged that when the back-is moved up to its position close -to the core to close theoasting chamber the flexible matrix is brought to the proper curved casting shape, and so that when the back is moved away from the core to open the box the matrix is flexed and separated' from the surface of the cast-plate, so that the same ,can be delivered from the casting chamber by a half turn of the core or cylinder, and so that the next movement of. the back to close the casting chamber will reposition the flexible matrix for a succeeding duplicate cast.

Q designates a melting pot in which is arranged a pump P which connects by a throat T to the casting chamber.

The only application of power in the present apparatus is to the pump and to a stirrer arranged in the melting pot in the same manner as shown in said previous applicafor patent for actuating the tion. Power is taken from an electric motor, or other suitable prime mover to a gear 10 mounted on a shaft 11 which carries a worm 12 which meshes with a worm-gear 13, turning with which is a pinion 14,which meshes with and drives a gear 15 secured on a shaft 16 which carries a cam J similar to that described in my previous application pump. Arranged on the shaft 11 is .a fly-wheel 17. A foot brake 18 is pivoted in position to engage this fly-wheel and is normally held out of contact with the fly-wheel by a spring 19, so that the operator by shutting off the power and by applying the brake, can quickly stop the apparatus. A pump lever 20 is pivoted to the frame and carries a roll 21 which engages the groove of said cam J. Extending from said lever is a rod 22 which loosely passes through a piece 23 and which is connected at its upper end to a draw-plate 24 'whichis fitted to slide on rods 2525 secured between said piece 23 and a bracket 26. Powerful springs 27-27 are arranged on said rods 25-25 under the draw-plate '24. The bracket 26 is adjustably secured at its upper end in a lever 28 secured on a shaft 29. Secured on the shaft 29 is a lever 30.

which connects by link '31 to the piston-rod 32 of the pump-piston 33. By this arrangement, the pump piston will be operated with a powerful movement from the cam J and a spring relief arrangement is provided in this connection, so that the metal in the casting chamber may be held under pressure as the same solidifies to form the cast plate.

Back of the gear 10 is arranged a pulley 34 runningaround which is a belt 35 which passes over suitable guiding or deflecting

pulleys

36 and 37, around a pulley 38 mounted on a shaft 39which connects to the stirrer in the tank which is arranged as shown in myprevious application for patent. The deflecting pulley 36 isarranged on a pivoted arm 40 which can be adjusted by screws 41 so as toset the belt to the proper tension. By this arrangement the metal will be kept agitated in the tank as the device is operated.

The mechanism for raising and lowering the back will now be described. J ournaled in hearings in the front of the framing is a shaft 42, mounted on which is a long operating lever or handle 43. Secured on the shaft 42 is a pronged lever 44 which connects by link 45 to a lever 46 mounted on a shaft 47 journaled in the framing under the back. Arranged on this shaft-47 are levers 48 which connect by links 49-to the back B. The back B is counterweighted by two counterweights 50 which are hung on levers 51 mounted on shaft 510 which connect by links 52 to the back. The levers and links 48 and .lever 43 is pulled out, as shown in Fig. 3, the back will be .locked in closed position up close to the core. When the operating lever is pushed in, as shown in Fig. '4, theback will be lowered.

On the end of the shaft 47 is arranged a short lever 53.which connects by link 54 to a pivoted rocking lever 55, which latter connects by link56 to a lever 57 mounted on a shaft 58 which has arms 59 which connect by adjustable links 60 to the throat T of the pump, as'shown in Fig. 11.

The pump and throat are fitted to slide in the frame toward and awayfrom the casting box, and the arrangement of the last described connections is such that when the back is raised to operative position the throat will be brought up tightly to position to co-- operate wit the'casting chamber, and so that when thefback 1s lowered, the pump and throat will be moved away from the casting-chamber to separate the throat nozzle from the cast plate.

Arranged on theend of the shaft 58 a small. lever 61 (see Figs. 5 and 12) which connects by link 62 to a lever 63 mounted on.

a shaft 64, on the inner end of which is secured an operating finger 65 arranged over the valve rod of the pump valve. The arrangement of these-connections is such that when the back is in its lowest position and the pump and throat moved away from the casting chamber, the finger 65 will assume the position shownin Figs. ,5, 12 and 13,

thereby locking the pump valve in its lowest and inoperative position, but so, that when the back B is raised to operative position and the pump and throat moved toward the casting chamber, the said operating finger 65 will be swung to the. position indicated in dotted lines in Fig. 13,'thereby releasing the valve rod. By this arrangement, it is impossible to start the pump into operation except when the back is in its raised position and the casting chamber closed. By this arrangement the pump cannot throw hot metal into the casting chamber or mold when it is open.

The pump is substantially the same as that described in my previous application for patent, the same acting as a lift pump, and the operation thereof being controlled by a valve 66 arranged on the end of a valverod 67, the valve-rod being counterbalanced by an adjustable counterweight 68 and the valve-rod being provided with a projection 69 whichis struck by the projection 70 on the piston rod in case the valve should stick when the piston reaches its lowest position. In the normal operation the valve 66 is held in open position, and as the piston is recip rocated the metal will flow in and out of the pump-cylinder, but when the pump is to act, the valve rod is released so that as the piston makes its downward movement the yalve will be opened and metal will flow into the pump cylinder, and so that as the piston starts on its upward movement, the valve will rise to its seat closing the pumpcylinder, whereby the metal contained within the pump-cylinder will be forced through the throat over into the casting chamber.

The pump is thrown into and out of operation by the followin connections; A rod 71 is connected to t e pump lever 20 and -to a bell-crank lever 72 which engages a slider 73 fitted on a rod 74. A spring 75 is arranged on the end of the rod 74 between the slider and an adjustable collar 76. Another adjustable collar 77 is secured on said rod 74 on the other side of the slider 7 3.' By

this arrangement the rod 74 will be moved back and forth in unison with the pump op erating lever, but the samewill have a spring relief on its motion toward the left, relatively to Fig. 3, whereby the rod 74 may be held in its right-hand position, the slider 73 then working against the tension of the spring 75 without reciprocating the rod 74. The rod 74 is connected at its other end to a vibrating lever 78 which carries a locking segment or piece 79 which is formed on a curve about the center of the lever 78, as shown more particularly in Fig. 10.

A pivotedlever 80 forms the controlling means for the 'pump valve. This lever 80 connects by rod 81 to a lever 82 mounted on a shaft 83 arranged over the pump, and which has on its end another operating finger 84 arranged in position over the valve rod. A spring pressed rod 85 normally holds the operating finger 84 in position over the valve-rod and the starting handle 80 in its 'inoperative position, shown in Fig. 9. The starting handle 80 has a notched locking piece 86 secured thereto in position to cooperate with the locking segment 79 on the'vibrating lever 78.

When it is desired to start the pump into operation the starting handle 80 must be pushed in to withdraw the operating finger 84 from over the valve-rod. This cannot be done so long as the locking piece 79 is over the notched locking piece on the starting handle 80. But when the vibrating lever 78 assumes its extreme right hand position as shownin Fig. 10, the locking piece 79 is clear of the locking piece 86 so that the starting handle 80 can then'be thrown in, releasing the operating finger 84- from the valve rod. This starting handle 80 should be thrown to such position that the locking piece 79 will come under 'the locking piece 86 and thus-hold the operating finger 84 in inoperative position, while vibrating lever 78 makes its forward oscillation and until --the same returns to extreme right hand pogage and the spring-pressed rod 85 through rod 81 willthrow the starting handle back to inoperative osition as shown in Fig.9.

The spring 5 is provided on the rod 74 .back of the slider 73 so that if the starting handle 80 should not be thrown far enough to the left in time to allow the locking. piece 79 to run'under the locking piece 86,- accident is avoided, the piece 79 holding the lever 80 in the osition to which it has been thrown and still allowing a full movement of the same to the left against the friction between the

pieces

79 and 86.

The parts are so arranged that the vibrating lever 78 'is at its extreme right hand posit on where it is possible to throw the startmg handle 80 only when'the pump piston Is at its lowest position and the pump read to operate. This prevents the opera- .tor from throwing the pump into operation only at the proper point in its 0 cle of operations Moreover, the locking mechanisms beforedescribed hold the operating finger 84 In inoperative position for just one stroke of the pump and when that stroke is completed the operating finger normally springs back toposltion to hold the valve open so that the valve is allowed .to work for one stroke of the pump and then is automatically thrown out of operation. By these arrangement-s, the pump can only be operated when the casting chamber is in closed position, can only be thrown into operation at the proper point in the cycle of operation of the pump, and the pump is kept in operation for just one complete stroke and then is automatically thrown out of operation.

The lever 57 is provided with a spot or to its operative position the lever 57 is swung to the position shown in dotted lines in- Fig. 4. When the operating handle 80 is moved to the left to start the pump into operation the lever or finger 830 swings down behind the lever 57 as shown in dotted lines in Fig. 12, and as the lever 80 is locked in its operative position for one period of operation or one complete reciprocation of the pump-piston, the lever or finger 830 cannot be withdrawn from behind the spot 57 0 until the lever 80 snaps back to inoperative posit-ion. This locks the back in operative position for one period of operation, and thus prevents a careless operator from lowering the back B by the handle 43 during the time the metal is beingforced into the casting chamber and until the plate has properly solidified. i

The mechanism for turning the cylinder or core to deliver the plate will now be described. On the cylinder or core is arranged a gear 87 meshing with which is an intermediate 88 which latter meshes with a gear 89 secured on' a shaft carrying an operating handle 90. On the side of the gear 87 are.

. lever 92 is pivoted to the framing and pivoted to this lever is a catch or pawl 93,

which is pulled in one direction by a spring 94;, a stop 95 limiting this motion as shown particularly in Fig. 8. A lever 96 having a locking shoe 9'? is also pivoted to the framing and is pushed up against a pin 98 by a spring 99. When the cylinder is to be turned, the operator lifts the releasing lever 92. This will move the pawl93 clear of the pin 91 which it engages and will allow the pawl 93 to snap behind the pin 91. The operator now rotates the operating handle to turn the cylinder or core C to deliver the plate. As the other pin 91 comes around, as the cylinder makes a half turn, it will engage the locking shoe 97 and force the same downward until it passes'the same. As this pin 91 passes the locking shoe 97 it will en gage the spring-pressed pawl 93, and this pawl will push the pin 91 .tightly against; the end of the locking shoe 97 and will thus hold this pin 91 in rigid engagement therewith. This will insure the core being stopped after an exact half turn has been given thereto. It is impossible to turn the core in the wrong direction, as the pins 91 can only pass the locking shoe 97 in the right direction. After the plate isdelivered from the casting chamber and as the back is closed for the next casting operation, the plate which is now on top of the core is lifted fromthe surface of the core or cylinder by a lifter L, the operation of which will now be described, reference being had to Figs. 6 and 7.

The lifter L consists of a blade 100 which is pivoted to the back B and which is nor kept in the position shown in Fig.v 6 by a spring-pressed rod 105. As the back moves down, the roller 102 runs on this pawl, thus moving the lifter away from the surface of the 0 re. When the back assumes its lowest position the roller runs in around the lower end of the pawl, whereby when the back is moved up the roller works in the left hand side of the cam groove and throws I the spring-pressed pawl out of its way, where'- by on the upward movement of the back, the lifter-plate 100 movesin close to and follows the contour of the core to engage the side of the plate and lift the same, as shown in Fig. 6, a stop or catch piece 106 being seoperator.

cured to the framing to hold the" other endof the plate while this lifting action takes ber and position the matrix by the operatorv pulling out on thelever 43. This will bring the pump throat to operative position and will release the operating finger from its control of the valve-rod. Then when the vibrating lever 7 reaches its right hand position, the operator pushes the starting handle 80 to the rear of the machine. This will release the operatin finger 84 from its control of the pump va ve at the right point of operation. The pump will now operate and The back is 'then raised will force the proper amount of metal into the casting chamber.

After the casting chamber has been filled the casting chamber will be kept closed and the parts in the position last described until the vibrating lever 78 reaching its right hand position, releases the starting handle 80 which will throw the operating finger 84.

into operative position, which will hold the pump valve in inoperative position. The operator'now pushesthe operating lever 43 in to lower the back and to strip and release the matrix from the surface of the castplate. Then the operator moves the lever 92 to release the particular pin 91 which is in engagement and turns the operating handle to impart a rotary movement to the core C, which will be stopped at just half a turn. Then the operator pulls the operating han dle 43 out to raise the back and position the matrix for the next operation, and, as this operation takes place, the plate just cast is lifted from the surface of the core. The operator now throws the starting handle 80 to the left at the proper time for the next cast. While this casting operation takes place the operator has plenty of time to remove the plate previously cast from the lifter and the stoppon piece 106 and pass it on to a finishing mec an1sm or to the next These operations are continued until the desired number of duplicate plates are cast from the same matrix.

As the parts are counterbalanced and arranged so that they can be easily operated,,

andas the heavy work of lifting the metal from. the melting pot over into the mold is done by power, the apparatus can be manipulated by a single workman with very little exert-ion and can be operated at high speed to make duplicate printing plates.

The arrangements and details herein ber, a

shown and described may be greatly varied by a skilled mechanic without departing from the scope of my invention as expressed in the claims.

Havin thus fully described my invention, what I c aim and desire to secure by Letters Patent is 1. In a stereotype printing plate casting apparatus, the combination of parts makin up a casting chamber, manually operated means for opening and closing the casting chamber, a power driven apparatus for filling the castlng chamber'with molten metal, and means whereby theoperator can throw the power-driven apparatus into operation only in proper sequence with the means for opening and closing the casting chamber.

2. In a stereotype printing plate casting apparatus, the combination of a core and back, manually operated means for moving the back to open and close the casting champower driven apparatus for filling the casting chamber with molten metal, and means whereby the operator can throw the power driven apparatus into andout of operation only in proper sequence with the means for opening and closing the casting chamber. j

3. In stereotype printing plate casting apparatus, the combination of parts making up a casting chamber, manually operated means for opening and closing the casting chamber, a power driven apparatus for filling the casting chamber with molten owerdriven a paratus will operate only or one cast, an means whereby the operator can throw the power driven apparatus 1n to op eration only when the casting chamber is closed. 4. In stereotype printing plate casting apparatus, the combination of parts making up a casting chamber, connection." for manually opening and closing the chamber, a power driven apparatus for filling the casting chamber with molten metal, and connections whereby this apparatus can be caused to operate only when the casting chamber .is

closed. p

5. In stereotype printing plate casting apparatus, the combination of a coreand back, manually operated means for moving the back to open and close the casting chamber,

a power driven apparatus for filling the casting chamber with molten metal, and connections whereby said apparatus can be caused to act only when the back is in position to close the casting chamber.

6. In stereotype printing plate casting apparatus, the combination of a core and back, manually operated means for moving the back to open and close the casting chamber, a power driven pump for forcing metal into the casting chamber, and connections wherel by the pump can-be caused to act only when the casting chamber is closed.

7. In stereotype printing plate casting apparatus, the combination of a core and segmental back, manually operated means for moving the back to open and close the casting chamber, a power driven pump, a valve ,controlling the pump, and connections bewhen the casting chamber is opened, and the pump allowed to operate only when the cast-- ing chamber is closed.

9. In stereotype printing plate casting apparatus, the comb1 nation of parts forming a casting chamber, a power driven apparatus for forcing molten metal into the casting chamber, a starting handle for throwing this apparatus into operation, and connections W erebythe starting handle can be moved to throw the apparatus into operation only when the casting apparatus is closed,'and when the power-driven apparatus is at the beginning of its operation for a cast.

10. In stereotype printing plate casting apparatus, the combination of parts forming a casting chamber, a ower driven apparatus for forcing metal 1nto the casting chamher, a starting handle for throwing the same into operation, and connections whereby the starting handle will be held in operative position during a cycle of operation.

11. In stereotype printing plate casting apparatus the combination of a casting apparatus, a power driven pump connected thereto, a starting handle for throwing the pump into operation, and connections whereby the starting handle can be moved to throw the pump into operation only at a predetermined po1nt in its operation.

1 2. In stereotype printing plate casting apparatus, the combination of a casting ap paratus, a power driven pump connected thereto, a starting handle for throwing the pump'into operation, and connections Whereby when the handle is thrown'to operative position it will be held in such position for a complete operation of the pump.

13. In stereotype printing plate casting apparatus, the combination of a casting apparatus, a power driven pump connected thereto, a starting handle for throwing the pump into operation, and connections whereby the starting handle can be thrown to op erative position only at a predetermined point in the operation of the pump, and whereby vwhen the starting handle is thrown to operative position it will be held in such position during a complete operation of the.

14. In stereotype printing plate casting apparatus, the comblnation of parts forming a casting chamber, manually operated means for opening and closingthe same, a power driven apparatus for filling the casting chamber with molten metal, and connections whereby the casting chamber cannot be opened while the filling apparatus is in operation.

15. Instereotype printing plate casting apparatus, the combination of parts forming a casting chamber, manually operated means for opening and closing the same, a power driven apparatus for filling the casting chamber with molten metal, and connections whereby the casting chamber cannot be opened while the filling apparatus is in operation and untilthe cast has solidified.

16. In stereotype printing plate 'casting apparatus, the combinationof parts forming a casting chamber, manually operated can be caused to act only. when the casting chamber isclosed, and connections whereby the casting apparatus cannot be opened until the casting chamber is filled and the cast has solidified. V

,18. In stereotype printing plate casting apparatus, the combination of parts forming a casting chamber, manually operated means foropening and closing the casting chamber, a power driven apparatus for filling the casting chamber with-molten metal, means whereby the casting apparatus can be caused to act only when the casting chamber is closed, connections whereby the filling apparatus can be thrown into operation only at a predetermined point in its operation, and whereby it will be thrown out of operation after the casting chamber is filled, and connections 'whereby the casting chamber cannot be opened until the cast is made.

19. In stereotype printing plate casting apparatus, the combination of parts fotming acasting chamber, a power driven pump for filling -.the casting chamber, a handle for controlling the pump, a vibrating lever actuated by the pump, a locking mechanism between the vibrating lever and the starting handle permitting the pump to be thrown into operation only at a predetermined point in its movement.

20. In stereotype printing plate casting apparatus, the combinationvof parts forming a castin chamber, a power driven pump for filling the casting chamber, a starting handle for controlling the pump, a vibrating lever actuated by the pump, a locking mechanism between the vibrating lever and the starting handle permitting the pump to be thrown into operation only at a 22. In stereotype printing, plate casting apparatus, the combination of a cylindrical core, .a locking mechanism for holding the same in diametrically opposed positions, and hand-operating mechanism for turning the core.

23. In stereotype printing plate casting apparatus, the combination of a cylindrical core, gearing for turning the same, means for rotating the gearing by hand, and mechanism for preventing the rotation of the corein but one direction.

24. In stereotype printing plate casting apparatus, the combination of a cylindrical core, manually operating gearing for rotating the same, and mechanism for stopping the rotation after each half turn.

25.'In stereotype printing plate casting apparatus, the combination of a cylindrical core, diametrically opposed pins turning therewith, a spring shoe for preventing the rotation of the core in but one direction, and a spring actuated pawl for locking the core in its two different positions, which pawl can be manually released.

26. In stereotype printing plate casting apparatus, the combination of the core and segmental back, manually operating mechanism for moving the back to open and close the casting chamber between the core and back, manually operating mechanism for turning the core to deliver the plate, and a lifter mechanism carried by the back for lifting the cast plates from the core.'

' 27. In stereotype printing plate casting core, a drag movable toward and from the apparatus, the combination of the core and core, and means operatively connected with segmental back, manually operated means the drag to remove a plate from the core as for raising and lowering the segmental back, the drag moves toward the core. 15 5 manually operated means for rotating the In testimony whereof I have hereunto set core, means for filling the casting chamber, my hand, in the presence of two subscribing power operating connections for operating witnesses.

the lastnamed means, and a lifter mecha i V H. A. WISE WOOD. nism carried by the back. Witnesses: 10 28. In a machine for making stereotype MAY V. TANNER,

plates, the combination of a cylindrical THOS J. MCBRIDE.