US1045342A

US1045342A - Feeding means for tube-mills and like grinding apparatus.

Info

Publication number: US1045342A
Application number: US57519610A
Authority: US
Inventors: James Edward Thomas
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-08-02
Filing date: 1910-08-02
Publication date: 1912-11-26
Anticipated expiration: 1929-11-26

Description

J. E. 'THOMA.

FEEDING MEANS FOR TUBE MILLS AND LIKE GRINDING APPARATUS.

' APPLICATION FILED AUG, 2, 1910.

1,045,342, Patented Nov. 26, 1912.

2 SHEETS-SHEET l.

Chm:-

COLUMBIA PLANOCIRAPH CO.. WASHINGTON. D. c.

. 'J. E. THOMAS. FEEDING MEANS FOR TUBE MILLS AND LIKE GRINDING APPARATUS.

APPLICATION FILED AUG 2, 1910,

Patented Nov. 26, 1912.

2 SHEETS-SHEET 2.

COLUMBIA PLANOGRAPH CD-.W ASHINGTON D c JAMES EDWARD THOMAS, 0F GERMISTON, TRANSVAAL.

FEEDING MEANS FOR TUBE-MILLS AND LIKE GRINDING APPARATUS.

Specification of Letters Patent.

Patented Nov. 26, 1912.

Application filed August 2, 1910. Serial N 0. 575,196.

To all whom it may concern:

Be it known that 1, JAMES EDWARD THOMAS, a subject of the King of Great Britain, and resident of Germiston, Transvaal, have invented certain new and useful Improvements Relating to Feeding Means for Tube-Mills and Like Grinding Apparatus, of which the following is a specification.

This invention relates to feeding means or devices for introducing pebbles, pieces of rock or other grinding material into tube mills, Huntingdon mills and similar grinding apparatus or machines. For the'purpose of introducing such material it is usual to provide at one end of the mill a'spiral intake or curved inlet through which said material passes into the mill.

The object of my invention is to provide improved mechanical means for automatioally feeding the mill, and obtain a more.

for holding the pebbles, rock or other material which is to be introduced into the mill.

Arranged in a suitable position relative to the aforesaid chute is a corrugated or fluted roller on to the top of which the material is delivered by the chute. A portion of the bottom plate of the chute is hinged so that it can move upward should any of the material jam between the roller and the lower edge of the chute. Straps fixed to the back of the chute serve for keeping the hinged portion of the plate in its proper position relative to the roller. The roller is provided. with projecting pins which operate to prevent the material jamming in the chute. The hinged plate at the bottom of the chute is provided with slots which permit of the passage through them of the proj ecting pins. 1 i

The fluted feeding roller is fixed upon a shaft, and the latter has an intermittent motion imparted to it which is derived from the tube mill. The driving means for the shaft comprise a friction wheel on the shaft and a pawl which is operated by means of a rope from a lever actuated by means of a cam or eccentric on the casing of the spiral intake. Means are provided for regulating the .movement of the operating lever to regulate the extent of the movement of the roller and the quantity of the material fed by it into the mill. The fluted roller delivers the material into another hopper from which it passes down a chute into the spiral intake of the mill. The lower portion of this latter chute is hinged so as to obviate jamming or choking of the chute by the material and to permit it to lift if necessary.

Means are provided for adjustably retaining the hinged portion of the chute in position so as to insure that the pebbles shall fall into the spiral intake at the proper point during the revolution of the mill.

The invention will be more fully described by aid of the accompanying drawings, in which by way of example I illustrate it adapted to a tube mill.

Figure 1 is an elevation of a portion of the feed end of a tube mill with the invention applied thereto. Fig. 2 is an end elevation of Fig. 1, and Fig. 3 is a plan of Fig. 2 with the top and bottom platforms, the tube mill, tube mill trunnion and trunnion bearing, removed.

1 in Figs. land 2 designates the end of the tube mill, 2 is the trunnion on the end thereof, and 3 the foundation and 4 the bearing for rotatably supporting trunnion 2.

5 is the spiral intake which delivers the pebbles, rock or other material into the outer end of the hollow trunnion 2 through which it passes into the interior of the mill 1. The spiral intake 5 is shown fixed, by means of the flanged part 6, on the end of the trunnion 2 by set-screws 7 These several parts of the mill may be of any ordinary construction and they do not embody any feature of my invention.

8 is the bottom and 9 the top platform. 10 are vertical posts arranged between the plat-

forms

8 and 9, which posts are utilized as hereinafter described for supporting certain portions of the driving mechanism for the feeding means.

11 is the top hopper or chute in which is placed the pebbles, rock or other material to be fed to the mill 1. The lower portion 12 of the bottom plate of the chute 1.1 is hinged as indicated at 13 and straps or flat pieces '14, which are riveted or otherwise fixed to the fixed portion of the chute above the hinged part 12 and extend downwardly, serve as stops upon which the hinged portion 12 rests when in its lowermost position.

15 is the hinge pin and 16 the eyes for the hinge pin, formed on the top of the p ate 12.

is attached by means of a shackle 30.

17 are bearings provided on the fixed portion of the bottom of the chute for the hinge pin 13.

This construction permits the plate 12 to move upward should pieces of the material jam between the roller (hereinafter referred to) and the lower edge of said plate.

18 is a corrugated or fluted roller of wood or other suitable material. It extends as shown in Fig. '2 the full width of the lower end of the chute.

19 represent pins provided in the roller and projecting for a suitable distance beyond the circumference thereof. These pins operate to loosen the material should it jam in the bottom of the chute. Slots 20 are formed in the lower edge of the hinged plate 12 to permit the pins to pass through upon rotation of the roller.

21 is the shaft on which the roller 18 is fixed. This shaft is free to rotate in bearings 22 fixed to the vertical posts 10.

23 is a friction wheel or pulley fixed upon the shaft 21.

24 are two members which at one end loosely embrace the shaft. Between the members 24 is pivoted a pawl or tumbler 25 which as shown in Fig. l is adapted to have frictional contact with the periphery of the friction wheel 23.

26 is a rope attached to the outer end or tail of the pawl.

27, 28 are preferably swiveled pulleys fixed to the underside of the top platform 9 over which the rope passes and 29 is the lever to which the other end of the rope 26 A series of holes 31 is provided for attaching the rope 26 by means of the shackle 30 at different points for effecting any requisite a dj ustment.

32 is a bracket fixed to the bottom platform 8, in which bracket lever 29 is fulcrumed, and 33 is a set-screw provided with a check-nut to serve as a means for adjusting the stroke of lever 29.

34 is a counterweight attached to the outer end of the lever 29.

35 is a cam or eccentric provided on the end of the casing of the spiral intake with which cam 01' eccentric the inner arm of the lever 29 is kept in contact by means of the counterweight 34. hen the mill is in operation the cam or eccentric depresses the inner end of the lever and in so doing rotates the friction wheel through part of a revolution through rope 26 and pawl or tumbler 25. This imparts a corresponding partial rotation to the corrugated feed roller 18.

36 is the hopper into'which the material is delivered by the

feed roller

18 and 37 the chute which conducts the material from said latter hopper to the spiral intake 5. The cylindrical casing of the spiral intake is provided with an opening or inlet 38 through which the material falls into the spiral intake from the chute 37. The cylindrical casing of the spiral intake is preferably protected by means of a wearing plate 39 upon which the material in the bottom of the chute rests until it enters the spiral intake through the inlet 38. The lower portion of the chute 37 comprising the bottom and vertical sides, is hinged to the fixed bot tom of the chute by means of a hinge pin 40.

41 are the eyes formed on the bottom of the hinged portion of the chute which work on the hinge pin 40 and 42 is the bearing formed on the bottom of the fixed portion of the chute.

43 is a piece riveted or otherwise suitably fixed at its upper end to the bottom of the fixed portion of the chute. It is bent around the hinge and at its lower end carries a screw 44 and check-nut 45 which serve as an adjustable stop for the hinged portion of the chute.

46 is the top or cover tion of the chute. This top or cover is also hinged as indicated at 47 and it has affixed to it a weight 48. By hinging the lower port-ion of the chute 37 and its cover 46 for the hinged por- 3 should any unduly large pieces of the material jam in' the inlet or mouth of the spiral intake the chute and cover can lift and so prevent the said parts sustaining damage from that cause.

What I claim as my invention and desire to protect by Letters Patent is 1. In feeding means for rotary grinding machines, in combination, a receiving chute, the lower portion of which is hinged, said hinged portion having a number of slots in its lower edge, a delivery chute in which the material is received from the receiving chute, and a roller arranged at the bottom of the hinged portion of the receiving chute which operates to transfer the material from the receiving chute to the delivery chute, said roller having pins projecting beyond its periphery which pass through the slots in the lower edge of the hinged portion of the receiving chute.

2. In feeding meansfor rotary grinding machines, in combination, a receiving chute, the lower portion ofwhich is hinged, the hinged portion being formed along its lower edge with a series of slots, a delivery chute, and a corrugated roller for transferring the material from the receiving chute to the delivery chute, said roller being provided with pins projecting beyond its periphery.

3. In feeding means for rotary grinding machines, in combination, a receiving chute, the lower portion of which is hinged, the hinged portion being formed along its lower edge with a series of slots, a delivery chute, said delivery chute having its lower portion hinged, an adjustable. stop for said hinged portion and a weighted hinged cover for said hinged portion.

4. In feeding means for rotary grinding machines, in combination, a receiving chute, the lower portion of which is hinged, the hinged portion being formed along its lower edge with a series of slots, a delivery chute, a corrugated roller for transferring the material from the receiving chute to the delivery chute, said roller being provided with pins projecting beyond its periphery, and stops for said hinged portion fixed to the bottom of the receiving chute.

5. In feeding means for rotary grinding machines, in combination, a receiving chute, the lower portion of which is hinged, said hinged portion having slots along its lower edge, a delivery chute, said delivery chute having its lower portlon hinged, a corrugated roller for transferring the material from the receiving chute to the delivery chute, said roller having pins projecting beyond its periphery which pass through the slot-s in the hinged lower portion of the receiving chute, a stop for said hinged lower portion of the receiving chute, an adjustable stop for the hinged lower portion of the delivery chute, and a weighted hinged cover for said hinged lower portion of the delivery chute.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES EDWARD THOMAS.

Witnesses:

N. SANFORD COTTRILL, CHAS. OVENDALE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington ID. 0.