US1457834A - Centrifugal casting machine - Google Patents

Description

June 5, 1923.

J. D. HAMMOND CENTRIFUGAL CASTING MACHINE Filed Dec. 5, 1921 A TTOHME YS Patented June 5, 1923.

Arai" erric- JOSEPH D. HAMMOND, OF JACKSON, MICHIGAN CENTRIFUGAL CASTING MACHINE.

Application led December 5, 1921.

To all lwhom. 'it may concern Be it known that I, JOSEPH D. HAMMOND, a citizen of the United States, and a resident of Jackson, in the county of Jackson and State of Michigan, have invented a new and useful Improvement in Centrifugal Casting Machines, of which the following is a full, clear, and exact description.

`My invention relates to die casting machines .and more particularly to devices of this character in which a molten metal is introduced intoa revolving iask. i

An object of my invention is to provide a device of the character described in which a' metal is introduced into a flask by a centrifugal force.

A further object of my ,invention is to provide a device ofthe type described in which a pouring device for introducing metal into the ask is actuated by a mechanism rotating at a predetermined speed.

A further object of my invention is to provide a device of the character described having'means for varying the speed at which the pouring devicewill be actuated.

A further object of my invention is to provide a device of the type described that is relatively simple in construction and operation, not likely to get out of order easily, and

thoroughly practical commercially.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out the appended claims.

My 'invention is illustrated in the accompanying drawings, forming part 'of this ap lication, in whchigure 1 is a side elevation of the device,

Figure 2 is a front elevationi of the same, portions being broken away and shown in section, and

Figure 3 is an enlarged plan view ofan element of the device.

In carrying out my invention,- I provide a base 1 having mounted thereon av substan- --tially u -shaped frame 2. The latter is secured to the base by means of a bolt 3 projected through the web of the frame inter- Serial N0. 520,053.

as by means of a pin y9. The gear 8 is in mesh with a gear 10 Lvmounted on a stub shaft 11 ]ournalled in a bearing12 integral with the arm 5. VThe gear 10 is rigidly secured to the shaft 11 and a crank arm 13 maintained thereon by means of a bolt 14 or the like provides a means for rotating the shaft 11 and the gear 10 to occasion the rotation of the shaft 6.

A fly wheel 15 is mounted on the shaft 6 and is formed with a hub 16 projecting beyond the inner end of the latter. The y wheel 15 is rigidly secured to the shaft by a pin 17 or other suitable means. The periphery of the hub 16 is reduced at 18 anda collar 19 is slidably-"mounted thereon. The reduction of the hub 16 defines an annular shoulder 20 which limits the movement of the collar 19 toward thev fly wheel. The collar 19 is formed with an annular groove or channel tained in the positions illustrated in Fig, 2 f

by the action of springs 25-25, each of which connects the corresponding ends of parallel `-sleeves 26-26 and 27e-27 mounted on pins 28-28 and 29-29 that extend laterally in opposite directions from the bell crank levers 22-22 at the outer ends thereof. The collar 19 is thus maintained against the shoulder 2O on account of the thrust of the inner ends`- of the belt crank levers 22--22` thereagainst. y

A driven shaft 30 is journalled in a bearing 31 integral with the arm 4 at its upper end and the inner end thereof is arranged to rest within the bore of the hub 16, being axially alined with the shaft 6. A clutch collar 32 is mounted on theshaft 30 between the bearin 31 and the adjacent end of the hub 16 an is securedito the shaft 31 to rotate therewith by a pin 33. The clutch collar 32 which is best seen in Fig. 3 of the drawings is formed with an annular groove 34 in its peripheral wall adjacent to the outer end thereof and with a recess 35 in its peripheral wall, as shown. An opening 36 extends from the inner wall of the clutch collar to the recess 35 and a slidable abutment 37 disposed in the recess 35 is arranged to project from the opening 36 into argalined recess 39 in the adjacent end of the hub 16, thereby locking the clutch collar 32 to the hub 16. A spring 40 disposed within the recess 35 between the slidable abutment 37 and the adjacent wall of the clutch collar 32 re-acts against the former to maintain the same 1n engagement with the alined recess or socket 39. The slidable clutch member 37 is formed with a vertical extension ,40' intermediate the end thereof, which provides a stop for limiting the movement of the slidable abutment toward the hub 16. An operating handle 41 is rigidly secured at 42 to the extension 40 and is disposed in a recess 38 so that the abutment*k 37 may be withdrawn from the socket 39, thereby disengaging the clutch collar 32 from the hub 16.

The bearing 31 has an integral upstanding lug 43 and a locking arm 44 is pivoted at one endl as at 45 to the lug. The free end of the locking arm 44 bears upon an inclined annular cam surface 46 of the slidable collar 19 and a pin or detent 47 depending from the locking arm 44 normally travels in the annular groove 34 in the periphery of the clutch collar 32 without engaging with the latter. When the slidable. abutment 37 is moved inwardly against the compression of the spring 40, the pin 47 will be moved from the annular groove 34 into engagement with an opening 48 in the upper surface of the handle 41 so that the abutment 37 will be held out of engagement with the socket 39. The driven shaft 30 has a spacing collar 49 secured thereon by means of a pin 50 or the like and a transverse beam 51 is intermediately secured as by means-of a countersunk bolt 52 to the end of the shaft 30. The beam 51 supports a pouring device 52. The latter is mounted on a holder 53' that may be slidable moved along the beam. A counterweight 54 is mounted on the beam and may be moved therealong to balance the weight of the pouring device 52 and that of a flask 55 that is held in operative engagement with the pouring device by a clamping member 56. The latter is slidable on the beam 51 and -may be secured in adjusted position thereon by means of a set screw 57. An adjusting screw 58 carried by the clamping member 56 maybe operated to permit removal of the flask 55. A set screw 59 provides a means for maintaining the counterweight 54 in adjusted position along the beam 51.

From the foregoing description of the various parts of the device, the operation there.- of may be readily understood. The handle or trigger 41 is grasped and manipulated to occasion the engagement of the locking pin 47 with the recess 48, whereby the abutment 37 is maintained out of engagement with the socket 39 and rotation of the shaft 6 and of the hub 16 will not occasion a rotation of the shaft 30. Consequently, the beam 51 carrying the mold and the pouring device will at this time remain in initial position. The rotation of the shaft 6 is effected by operation of the crank arm 13. The ratio of the gears 10 and 8 is such that a relatively high speed may be obtained by manual operation of the crank arm 13. As the speed of rotation of the shaft 6 and of the ily wheel 15 is increased, the parallel arms of the bell crank levers 22-22 will move apart against the tension of the springs 25-2 5, thereby moving the slidable collar 18 toward the clutch collar 32. The locking arm 44 will be moved upwardly on account of the engagement of the free end thereof with the cam surface 46 and the pin 47 will thereupon be moved out of engagement with the recess 48. The abutment 37 willthen be moved by the action of the spring 40 into the socket 39 in the adjacent end of the hub 16, thereby locking the clutch collar` 32 to the hub 16. Obviously, the shaft 31 will now be driven and the beam 51 will be rotated about the axis of the shaft 30. A molten metal in the pouring device 52' will be thrown outwardly through the spout 60 of the latter by centrifugal force into the open communicating end of the mold 55 in which the metal is to be cast. The beam 51 is not rotated until a predetermined speed has been attained and consequently the force acting on the metal when the beam is revolved will be suiicient to insure the forniation of a compact mold. The speed at which the beam 51 will be actuated may be varied by varying the tension on the springs 25-25.

While I have shown a device arranged to be operated manually, it is obvious that the driving force may be applied by power means and that many other modifications and adaptations of the form of the device illustrated in the accompanying drawing may be made without departing from Gliespirit and scope of the invention as set forth in the foregoing and outlined more particularly in the appended claims.

I claim:

1. A device of the character described comprising a pouring instrumentality adapted to normally hold a molten metal, a flask adapted to receive metal from the pouring instrumentality, a beam, means for adjustably securing the pouring instrumentality to the beam, means for adjustably securing the flask -to the beam in adjusted position relative to the pouring instrumentality, a shaft connecting at its outer end' with the beam intermediate the length of the latter, a shaft for driving the first named shaft, means for rotatably supporting the first named shaft and the drive shaft in co-axial alinement, cooperating means carried by said shafts at their adjacent ends for causing the operative engagement of said first named shaft by the drive shaft, and means for rotating the drive Shaft.

- the beam, means or ad'ustably securing the flask to the beam in a justed position relative to the pouring instrumentality, a shaft connecting at its outer end with the beam intermediate the length of the latter, a shaft for driving Ithe first named shaft, means for rotatably supporting the first named shaft and the drive shaft in co-axial alinement, cooperating means carried by said shafts at their adjacent ends for causing the operative engagement of said first named shaft by the drive shaft, means carried by said supporting means and arranged to engage with the clutch means carried by the first named shaft to normally lock the latter out of operative engagement with the drive shaft. spring means arranged to urge the clutch means carried by the first named shaft into operative engagement with the clutch means carried by the drive shaft, a governor controlled device, arranged lto be operated by the drive shaft and to actuate saidlocking means to permit movement of the clutch, means carried by the first named shaft into operative engagement with t'he cooperating clutch means carried by the drive shaft, and means for rotating the drive shaft.

3. A device of the type, described comprsing a frame, a shaft rotatably carried by said frame, a rod rigidly secured at its mid point to said shaft, a fiask and a crucible adjustably carried by -said rod and being disposed adjacent -to one end of said rod, -a counterweight carried by the other end of said rod, a second shaft rotatably carried -by said frame,'manually operated' means for rotating said s econd named shaft, and automatic means for effecting the engagement of said 'first named shaft with said second named shaft when said second named shaft has attained a 'predetermined speed.

4. A'v device of the character, described comprising a frame, a shaft rotatably carried by said frame, a rod rigidly Vsecured at its mid point to said shaft, a flask and a crucible adjustably carried by said rod and' being disposed adjacent to one end' of said rod, a counterweight adjust-ably 'carried by the other end of said rod, a second shaft rota tably carried by said frame, a fiy Wheel carried by said second named shaft, manually operated means for actuating said second named shaft, a governor carried by said Wheel 4and being adapted to effect the engagement of said second named shaft with said first named shaft when said second named shaft has attained a predetermined speed.

JOSEPH D. HAMMOND.

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