US1517797A - Molding machine for foundry use - Google Patents

Description

Dec. 2, 1924. ,5 7,797 Y J. B. NEESHAM MOLDING MACHINE FOR FOUNDRY USE Filed March 9, 1923 2 Sheets-Sheet 1 J. B. NEESHAM MOLDING MACHINE FOR FOUNDRY USE 2 Sheets-Sheet; 2

Filed March 9, 1925 x as I? I I I u Patented Dec. 2, 1924.

UNITED STATES PATENT oFFica.

JOHN BIRCH NEESI-IAIYLOF GLASGOW, SCOTLAND, ASSIGNOB TO JOHN MACDONALD & SON LIMITED, 015 GLASGOW, SCOTLAND.

MOLDING MACHINE FOR FOUNDRY USE.

Application filed March 9, 1923.

To all whom it may concern.

Be it known that I, JOHN BIRCH NEESHAM, 4 Kelvinside Gardens, Glasgow, Scotland, a subject of the King of Great Britain, have invented a certain new and useful Improved Molding Machine for Foundry Use, of which the following is a specification.

This invention relates to foundry molding machines of the type having a jarring ram and a lifting ram (for lifting the molding box and mould clear of the pattern) concentrically mounted within the same cylinder with a sleeve interposed between them.

In known machines of this type the jarring ram is mounted within the sleeve and the lifting ram exteriorly of the same, which arrangement, although open to many objections, has hitherto been found necessary in order that the lifting means carried by the lifting ram shall be properly positioned to engage the molding box at the outside of the machine table. One objection is that as the jarring ram is surrounded by the lifting ram, there can only be a central impact jarring surface which is limited by the diameter of the jarring ram and is therefore, small in comparison with the total area of the mould. Another objection is that part of the outer surface of the sleeve, when the lifting ram is inoperative and during the time occupied in filling the molding box with sand, is exposed to dust and sand particles which are apt to adhere thereto and cause an abrasive action to take place on the inner surface of the lifting ram when it is moved upwards.

In accordance with the present invention the jarring ram is arranged in the cylinder exteriorly of the sleeve, being formed with an outwardly extending head or part adapted to constitute the impact surface of the ram and also with upwardly extending arms for supporting the machine table, and the lifting ram ismounted within the sleeve, being formed with a cross head, or equivalent, adapted to move between the aforesaid arms and carrying the means for lifting the mould clear of the pattern. With this arrangement the impact surface is not centrally localized but extends, or can be made to extend independently of the diameter of the jarring ram, over an area approximating to that of Serial No. 623,829.

the mould thereby giving a more equal and perfect jarring action.

The head of the jarring ram is arranged to impact upon an impact ring (or rings) solidly supported on the top of the cylinder and, when the machine is at rest, as when filling the molding box, the jarring ram encloses and protects the outer bearing surface of the intermediate sleeve from dust and sand and its own outer bearing surface is likewise protected because of the close contact of the head with the impact ring on the top of the cylinder, further the inner surface of the sleeve and the outer surface of the lifting ram are also protected by an overlapping collar on the lifting ram. In this way all the bearing surfaces are protected from the detrimental action of sand and dust.

The lifting means carried by the lifting ram crosshead may be arranged to be adj usted by fluid pressure in order to suit different sizes of molding boxes or flasks. To this end the lifting means may comprise a pair of lifting brackets supported at the outer ends of the rods of two pistons slidable in the cross head which is made hollow and constitutes a cylinder to which the motive fluid can be admitted to force the pistons and rods outwards against spring means.

Preferably the arring ram is arranged to beoperated directly by pressure fluid and the lifting ram indirectly by pressure fluid acting on a liquid which liquid may be contained in a chamber, formed in the base of the machine, and used repeatedly. In this connection provision may be made whereby the jarring ram is locked and positively maintained inoperative when pressure fluid is admitted to act on the liquid to raise the lifting ram. 1

In order that the invention may be clearly understood, reference is made to the accompanying drawings, which show, by way of example, one construction of molding machine in accordance with the invention.

Fig. 1 is a front sectional elevation of the molding machine.

Fig. 2 is a side elevation, partly in section corresponding to Fig. 1.

Fig. 3 is an enlarged sectional elevation of the jarring valve.

of the ram.

As illustrated, the molding machine is made with a base 1, within which an oil chamber 2 is formed, and with an outer cylinder 3 secured at the top of the base. A sleeve 4 is arranged within the outer cylinder and is formed in two diameters, the larger of which fits within the bore of the cylinder 3 and rests, at its bottom end, on a plate 5, accommodated in a recess formed above the oil chamber 2. A hollow cylindric jarring ram 6, which is controlled in its operation by means of a jarring valve, 106 (Fig. 2), is adapted to slide in the annular space between the main cylinder and the sleeve 4 and is provided with a head 7 from which two upwardly extending arms 8, 8, branch off forming an opening 9 between them. A recess 7 a in the head 7 may be arranged to contain lubricant. A hollow cylindric' lifting ram 11 is s'lidably fitted within the sleeve 4, and a lifting crosshea'd 13 is securely fastened to the upper end It will be seen that the outer surface of the jarring ram is protected from the entry of sand or dust by the head 7 on the latter while the inner surface of the sleeve 4 and the outer surface of the lifting ram 11 are protected in like manner by a collar 13 formed on the crosshead 13.

The jarring ram 6 has a packing ring 15 of leather or other suitable material, secured at its lower end and adapted to bear on the sleeve 4, and piston rings 16, 17 and 17 a are fitted in recesses formed in the ram, to prevent escape of the fluid. Fluid ports 18, 19 and 29, Figs. 2 and 3 are provided at the lower end of the ram, and, in the normal or non-jarring position of the ram "the exhaust port 20 registers with ports 21 and 22 formed in the wall of the outer cylinder 3.

Impact rings 23 and 24 are provided between the head 7 of the jarring ram and main cylinder, in order topreventexcessive shock when the jarring ram is allowed to fall by gravity. In order to limit the upward travel of the jarring ram, a'chec-k rod 25, Fig. 2 is securely fixed in a boss 26 cast on the head 7, and is adapted to slide in a guidehole provided in a. boss 27 formed on the outer cylinder, and washers 28 and 29 are secured against the bottom shoulder of the check rod by a nut 30. An oil groove 31 is provided in the boss 27 for lubrication of the check rod.

The arms 8, 8, formed on the head 7 of the jarring ram, are spaced so as to allow free movement of the lifting'ram and lifting cross head between them, and are provided with a machine table 10, Fig. 1 at their The machine table is formed in two parts 32 and 33, Fig. 2, a recess 34 within which a plate 35 is fastened, being provided in each of the two parts. A vibrator 36 of any suitable type issecured to the machine table.

cesses formed in the lifting ram 11.

Fluid ports 37 and 38, Fig. 1, are formed in the base 1 of the machine and serve for the admission and the exhaust of the fluid through the pipe 39 to and from the oil chamber 2, a passage 148, Fig. 2 admitting oil to the oil chamber from an oil tiller 149. An oil exhaust valve 40, Fig. 1 is secured to the plate 5, fixed in the recess above the oil chamber and projects through the opening 150 into the oil chamber. An oil supply pipe 48, Fig. 1, is fixed in the base in such a manner that its bottom end is below the level of the oil in the oil. chamber, whilst its top end enters a. passage 49 formed in the sleeve 4. The passage 49 is in communication with the passage 50 in the sleeve 4, and an adjusting valve 51,which is screwed into a boss 52 formed on the outer cylinder 3, fits within the passage 50, and is provided with a port 53 in which are formed ports 54 communicating with the passage 50.

Piston rings 56 and 57 are fitted in re The mould lifting crosshead 13 comprises a cylinder 58, Fig. 1, within which are slid ably fitted two pistons 59 and 60, formed with piston rods 61 and 62 which extend beyond the ends of the lifting crosshead. The pistons'are pressed inwardly by springs 63 and 64, which are held in position by means of collars 65 and 66 fixed in recesses in the ends of the crosshead cylinder. Lifting crosshead brackets 12 and 12 provided with lifting horn'brackets 14,14, are secured to the piston rod extensions 67 and 68, respectively, a passage 69 is formed in the piston 59 and piston rod 61, and ports 70 are provided in the piston rod extension 68 which is secured to the boss 71 of the lifting bracket 12 The ports 70 communicate with a passage 72, Fig. 2, provided in the boss 73, and fluid is admitted to or exhausted from the crosshead cylinder through a pipe 74. Adjusting handles 75 and 76 are secured to bosses 77 and 78 on the lifting crosshead 13, Fig. 1 and arranged to slide in holes formed in the bosses 79 and 80 on the lifting brackets 12 and 12. Sleeves 81 and 82 are adapted to screw on to the threaded ends 83 and 84 of the handles 75 and 76, in order to permit lateral adjustment of the lifting brackets 12 and 12.

Sand guards 85 and 86 are'secured to the lifting brackets.

In order to prevent movement of the lifting crosshead 13 about its own axis, rods 87 and 88, are fixed in the bosses 77 and 78 and are slidably fitted in holes formed in of the bosses 77 and 78 on the lifting crosshead 13.

Each of the lift'ng horn brackets 14, 14, is provided with two lugs 97 and 98, Fig. 2 having slots 99 and 100 which permit vertical adjustment of the lifting horn brackets. Lifting horns 101 and 102 on the brackets 14, 14, enter recesses 103 and 104, Figs. 1 and 2, formed in the machine table 10, and, in the lowest position of the lifting ram, are adjusted so as to be just clear of the molding box 105.

The admission and exhaust of the fluid for the jarring operation is controlled by a self-acting jarring valve 106, Figs. 2 and 3 which comprises an outer casing 107 and a sleeve 108 slidably mounted on a fixed piston 109. The ends of the casing 107 are closed by means of screwed covers 110 and 111, and an adjusting pin 112 is arranged to screw into the top cover 111 and to bear on a boss 113 formed on the sleeve 108. The bottom cover 110 secures the fixed piston 109 in position within the casing. The sleeve 108 is provided with an annular port 114, which serves for the admission of the fluid from the inlet pipe 115 and ports 116 in the valve casing 107, to the ports 117 and 118 formed in the casing. A port 119 in the valve casing, and a port 120, formed in the wall of the outer cylinder 3, communicate with the port 118, and the port 120 is adapted to supply fluid to the annular space 121, beneath the jarring ram 6, and to ports 18 and 19 in the arring ram. The sleeve 108 is also provided with an annular port 122 and ports 123 formed therein. A port leading to an annular space 125 is provided for the escape of fluid which might leak into the interior of the sleeve 108, and a port 126 is formed in the outer casing 107 to allow such fluid to escape to the atmosphere. A port 127 is also provided in the wall of the valve casing for the escape of any fluid that might leak below the sleeve. A recess 128 is formed at the upper end of the fixed piston 109 and a spring 124, which fits in this recess, keeps the valve sleeve 108 pressed upwards when the valve is not in operation. The piston 109 is hollow, and ports 129 provide connection between the hollow interior and an annular space 130, formed in the exterior of the piston. The annular space 130 connects with the port 119 in the valve casing, and port 120 in the wall of the main cylinder. Exhaust ports 131 are formed in the wall of the piston 109 and communicate with its hollow interior and an annular space 132 in the piston. An exhaust branch 133, leading to the atmosphere, is formed in the valve casing 107. Ports 134 and 135 are adapted for the admission or exhaust of fluid to or from the valve casing above the sleeve 108.

A locking plunger 136, Fig. 2 is adapted to slide within a cylinder 139 formed in a boss 140 on the outer cylinder 3, and is forced to engage in a recess 137 in the jarring ram by means of pressure fluid admitted through a pipe 138 and a port 142 in the cover 141, and to be disengaged by the reaction of a spring when the fluid is exhausted. The arrangement is such that the admission of fluid to the cylinder 139 to engage the locking plunger in the recess in the arring ram, takes place simultaneously with the admission of the fluid, above the oil in the oil chamber 2, which raises the lifting ram.

The operation of the machine is as follows Dealing flrstly with the jarring operation. A pattern plate 143 and molding box 105 are placed on the machine table, and sand is introduced around the pattern in the usual manner. Referring now more particularly to Fig. 3. The fluid (compressed air) is admitted through the pipe 115 to the jarring valve 106, and passes through the annular space 114 in the valve sleeve 108, through port 117, passage 118, and port 120 in the outer cylinder 3 into the annular space 121 beneath the jarring ram 6. The fluid pressure causes the jarring ram to be raised until its upward travel is stopped by the contact of the washer 28, on the check rod 25, Fig. 2 with the boss 27 on the outer cylinder when the exhaust of the fluid from beneath the jarring ram takes place through port 18 in the ram, and port 19, which is now opposite to the port 21 in the outer cylinder, and the exhaust fluid passes through port 21, (see also Fig. 3) and ports 134 and 135 in the valve casing, above the valve sleeve 108, and forces it down against the pressure of the spring 124. The downward travel of the valve sleeve 108 brings the an nular space 114, in the sleeve, below the fluid inlet port 116, and, when the bottom of the sleeve bears on the shoulder 144 of the pis ton 109, the annular space 122 registers with the exhaust passage 133 in the casing. hen this takes place the fluid beneath the jarring ram exhausts rapidly through the ports 120 and 119, annular space 130 in the piston 109, and ports 129 into the hollow interior of the piston, whence it passes to the atmosphere through ports 131, annular passage 132, the piston ports 123, annular passage 122 and exhaust passage 133. The jarring ram now sharply falls by gravity until its head 7 contacts with the fibre ring 23, when the recess 20 registers (see Fig. 3) with the ports 21 and 22 in the outer cylinder 3, and allows the fluid at the top of the jarring valve to escape through the ports 135, 134, 21, 20 and 22 into the atmosphere whereupon the spring 124 reacts to move the jarring valve back to its original position (see Fig. 3) for the supply of compressed air to the bottom of the ram 6 in order that it may be again raised in the manner before stated.

The jarring operation is repeated as many times as is essential to pack the sand firmly in the molding box and around the pattern.

In order to lift the molding box 103 and mould clear of the pattern, fluid is admitted into the oil chamber 2, through the pipe 39, Fig. 1 and ports 37 and '38, simultaneously fluid is admitted to the vibrator 36 through pipe 147, and to the locking plunger cylinder 139, Fig. 2 through the pipe 138, to force the plunger 136 into the recess 137 formed in the jarring ram 6 which is consequently locked in position. The pressure of the fluid on the oil in the oil chamber forces the oil up the pipe 18, Fig. 1 and port 19 in the intermediate shouldered sleeve 1, from which it passes through the ports 54 and port 53, in the adjustable oil valve 51, to the space 55 and beneath the lifting ram 11 which it raises.

During the upward movement of the lifting ram, the lifting horns 101, 102, engage beneath the molding box 105, Fig. 1, and lift it together with the mould, clear of the pattern, whereafter the fluid is exhausted sin'mltaneously from the oil chamber 2 and the jarring ram locking plunger cylinder 139, and the locking plunger 136 is withdrawn from the recess in the ram by the reaction of the spring. The fluid exhausts from the oil chamber 2 through the ports 38 and 37, and the oil passes back from beneath the lifting ram through the port 53 and ports 54: in the adjustable oil valve 51, port 49 in the sleeve 4, and pipe 18 into the oil chamber.

In order to adjust the width between the lifting horns for difl'erent sizes of molding boxes, fluid is admitted from the pipe 7 1 (Fig. 2) into the passage 72, in the boss 73 on the crosshead 13, and passes through the ports and 69 in the crosshead piston 59, Fig. 1 into the space 58, between the pistons 59 and 60. When the sleeves 81 and 82 are screwed backwardly on the handles and 7 6, the fluid pressure forces the pistons 59 and 60, and the lifting brackets 12 and 12, which are attached to them, outwards against the pressure of the springs 63 and (i l, the boss 79 and of the said lifting brackets being guided on the handles 75 and 7 6. When it is required to return the lifting brackets to their normal position, the fluid is exhausted from the space 58 between the pistons 59 and 60, and passes through the ports 69, 70, 72 and pipe 74:, the said brackets and pistons being forced inwardly by the pressure of the springs 63 and 64:.

Having now fully described my invention what I claim and desire to secure by Letters Patent is 1. A foundry molding machine comprising, in combination, a cylinder, a jarring ram within the cylinder, a mould lifting ram within the jarring ram, and means for operating said rams.

2. A foundry molding machine comprising, in combination, a base, a cylinder sup ported on the base, a jarring ram within the outer cylinder, a mould lifting ram within the jarring ram and means for operating said rams.

3. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within the cylinder, a mould lifting ram within the jarring ram and a bearing sleeve interposed between said jarring and mould lifting rams.

4. A foundry molding machine comprising, in combination, a base, a cylinder on the base, a jarring ram slidable within the cylinder, an abutment for limiting the upward travel of the jarring ram, a mould lifting ram slidahle within the jarring rain, and a bearing sleeve interposed between the jarring and mould lifting rams.

A foundry n'iolding machine comprising, in combination, a base, a cylinder on the base, a jarring ram within the cylinder, a mould lifting ram within the jarring ram. and a shouldered bearing sleeve between said jarring and mould lifting rams.

6. A foundry molding machine comprising, in combination. a hollow base. a cylinder supported by the base, a jarring ram slidable within the cylinder, a mould lifting ram slidable within the jarring ram and arranged for operation by means of a liquid contained in the hollow base, and a bearing sleeve interposed between the jarring and mould lifting rams.

7. A foundry molding machine compris ing, in combination, a base, a cylinder supported on the base, a jarring ram within the cylinder, a mould lifting ram within the jarring ram, a sleeve interposed between the jarring and mould lifting rams, and means on the jarring ram for supporting a molding box.

8. A foundry molding nuichine comprising, in combination, a base, a. cylinder supported on the base, a. jarring ram within the cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and mould lifting rams, a machine table on the jarring ram and means for vibrating said table.

9. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a iarring ram within the cylinder, a mould lifting ram within the jarring ram, :1 bearing sleeve between the jarring and mould lifting rams, and a shoulder on the jarring ram constituting an impact surface therefor.

10. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within the cylinder arranged to be operated therein by pressure fluid, and .a mould lifting ram within the jarring ram arranged to be operated therein by liquid under pressure.

11. A foundry molding machine comprising, in combination, a cylinder supported on the base, a jarring ram arranged to be operated within the cylinder by pressure fluid, a mould lifting ram arranged to be operated Within the jarring ram by liquid under pressure, a bearing sleeve interposed between the jarring and mould lifting rams, and a hollow base on the machine to contain the liquid for operating the mould lifting ram.

12. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram arranged for operation within the cylinder by pressure fluid, a mould lifting ram arranged for operation within the jarring ram by liquid pressure, and a shouldered sleeve interposed between the jarring and mould lifting rams and held stationary within the cylinder by pressure fluid acting at the junction of its large and small diameters.

13. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within the cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and mould lifting rams, mould lifting means, and means on the mould lift ng ram for supporting the mould lifting means.

14:. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ramshdable within the cylinder, a mould lifting ram slidable within the jarring ram, a bearing sleeve interposed between the jarring and mould lifting rams, and means for locking the jarring ram against movement during the sliding movement of the mould lifting ram.

15. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within the cylinder, a mould lifting ram within the jarring ram, bearing sleeve between the jarring and mould lifting rams, and a plunger arranged to be forced by pressure fluid to engage in the jarring ram for locking the latter against movement.

16. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram arranged for operation within the cylinder by compressed air, and a mould lifting ram arranged for operation within the jarring ram by liquid under pressure.

17 A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram operated within the cylinder by pressure fluid, a mould lifting ram within the arring ram, a bearing sleeve between the jarring and mould lifting rams, and a jarring valve to supply and exhaust the pressure fluid to and from the jarring ram.

18. In a foundry molding machine having, in combination, a cylinder, 21. jarring ram arranged for operation within the cylinder by pressure fluid and a mould lifting ram within the jarring ram, and an automatically actuating valve for controlling the operation of the jarring ram.

19. In a foundry molding machine including a cylinder, a fluid pressure jarring ram, a mould lifting ram, both of said rams operating in the cylinder and telescoping with each other, a bearing sleeve interposed between said rams, and a valve for controlling the operation of the jarring ram.

20. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within said cylinder, arms on the jarring ram for supporting the table, a mould lifting ram within the jarring ram, a bearing sleeve between said jarring and mould lifting rams, and a crosshead secured to the lifting ram and extending between the arms on the jarring ram.

21. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within the outer cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and mould lifting rams, arms on the jarring ram, a crosshead on the mould lifting ram, and mould lifting means supported by said crosshead.

22. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within the cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and mould lifting rams, arms on the jarring ram, a machine table on the arms, a crosshead on the mould lifting ram and mould lifting brackets supported by the crosshead.

28. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within the cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and mould lifting means, arms on the jarring ram, a crosshead on the mould lifting ram, mould lifting brackets and means for adjusting the latter outwardly.

24. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within said cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and mould lifting rams, arms on the jarring ram, a cross'head on the mould lifting ram, mould lifting brackets and means operated by pressure fluid for adjusting the latter outwardly.

25. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within said cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and mould lifting rams, arms on the jarring ram, a crosshead on the mould lifting ram, mould lifting means, pistons slidably arranged. within the crosshead and adapted to move the mould lifting means outwardly.

26. A, foundry mfolding machine comprising,. in combination, a base, a cylinder supported on the base, a jarring ram within the cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and mould lifting rams, arms on the jarring ram, a crosshead secured to the mould lifting ram and arranged between said arms, pistons slidably arranged within the crosshead and operated in one direction by pressure fluid and in the other by resilient means, extensions on the pistons, and mould lifting means secured to said extensions.

27. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within the cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and mould lifting rams, arms on the jarringram, a crosshead secured to the mould lifting ram and arranged between said arms, mould lifting means supported by the crosshead and adjustable laterally, and means for limiting the lateral movement of the mould lifting means.

28. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a arring ram within the cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and mould lifting rams, arms on the jarring ram, a crosshead secured to the mould lifting ram and arranged within said arms, pistons slidably arranged within the erosshead and operated by pressure fluid, extensions on the pistons, mould lifting means carried by said extensions and adjustable means for limiting the extent of outward movement of the mould lifting means.

29. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within the cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and lifting rams, arms on the jarring ram, a crosshead on the mould lifting ram.

and arranged within said arm and means for preventing movement of the erosshead about its axis.

30. A foundry molding machine eom prising, in combination, a base, a cylinder supported on the base, a jarring ram within the cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and lifting rams, arms on the jarring ram, a crosshead on the mould lifting ram and arranged within said arms, rods secured to the crossheud and slidably arranged in bosses on the cylinder and dash pots enclosing said rods and arranged. to contain lubricant.

31. A foundry molding machine comprising, in combination, a base, a cylinder supported on the base, a jarring ram within said cylinder, a mould lifting ram within the jarring ram, a bearing sleeve between the jarring and mould lifting rams, arms on the jarring ram, a crosshead on the mould lifting ram and arranged between said arms, mould lifting mleans supported by the crosshead, and means adjustably arranged on the mould. lifting means for engaging beneath a molding box during the mould lifting operation.

32. A foundry molding machine eomprising, in combination, a base, a cylinder supported on the base, a jarring ram within the outer cylinder, arms on the jarring ram, means on said arms for sup 'iorting a molding box, a shoulder on the jarring ram for constituting the impact surface of the latter, resilient means between said shoulder and the cylinder, a. mould lifting ram within the jarring ram, a bearing sleeve interposed between the arring and mould lifting rams, a crosshead arranged on the mould lifting ram for supporting mould lifting means, means for adjusting the latter outwardly, means for limiting the outward movement, and means adjustaliily arranged on the mould lifting means for engaging beneath the molding box.

33. A foundry molding machine eompris ing, in combination, a base adapted to con- -tain liquid, acylinder supported on the base, a jarring ram with a bifurcated upper part and arranged for operation within the cylinder by pressure fluid, a shoulder on the jarring ram, resilient means between the shoulder and the cylinder, a machine table on the jarring ram, a valve for controlling the supply of pressure fluid for operating the. jarring ram, a mould lifting ram arranged for operation within the arring ram by liquid under pressure, a bearing sleeve interposed between the jarring and mould lifting rams, a orosshead on the mould lifting ram and arranged within the bifurcated upper part of the jarring ram, rods secured to the crosshead for preventing movement of the latter about its axis, mould lifting brackets supported by the erosshead, pistons slid-ably arranged within the crosshead for moving said mould lifting brackets outwardly to suit different sizes of molding boxes, adjust-able sleeves for limiting said movement, mould lifting horns adjustably arranged on the mould lifting brackets for engaging beneath a nrolding box, an abutment for limiting the upward travel of the jarring ram, means for locking the latter against movement during the operation of the mould lifting ram, and means for vibrating the machine table.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN BIRCH NEESHAM. Witnesses MIMA ANDERSON, MARY GREEN.

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