US1268479A - Crusher. - Google Patents

Description

W. K. LIGGETT.

CBUSHER.

APPLICATION FILED JULY 28.1914.

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CBUSHER.

APPLICATION FILED JULY 28.1914.

Patented June 4, 1918.

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WILLIAM K. LIGGETT, OF COLUMBUS, OHIO, ASSIGNOR TO THE JEFFREY MANUFAC- TURING COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF OHIO.

CRUSHER.

Application led July 28, 1914. Serial No. 858,586.

To all whom t may concern:

Be it known that I, VILLIAM K. LIGGETT, a. citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Crushers, of which the following is a specification, reference being had therein to the accompanying drawings. E

My present invention relates particularl to Crushers of the sort known as single ro l coal crushers.

Previous to my invention machines of this type have not satisfactorily taken large sizes of coal and reduced them to the de- 'scribed neness in a single operation.

The object of this invention is to produce a machine which will, without special adjustment, take either large or snall sizes of coal and reduce them to a desired ineness.

The devices by which I accomplish this object are fully Set forth in the following specification and illustrated in the accompanying drawings, of which- Figure 1 is a side elevation of the machine, the side frame being partially broken away; Y

Flg. 2 is a transverse vertical sect1on along the'line 2-2 of Fig. 3;

Fig. 3 is a general plan view of the machine. v

Referring to the drawings, the reference numerals 1 and 2 represent the end sections which are securely joined by the cross members 3 and 4 to form a supporting frame for the machine. Journals 5 5 and 6-6 are provided in these end sections in which are mounted the roll shaft 7 and the counter shaft 8. These journals are provided with the usual removable caps so that the machine may be easily taken apart when so desired. A. hub 9, provided with radial Wings 10 is keyed to one end of the shaft 8 and in turn is fastened to a pulley wheel 11 by means of pins 12 passing through the wings l0 and the arms of the pulley 11. These pins 12 are made of some such material as wood and their cross section is such that in case of a sudden overload being thrown upon the machine they will shear, thus disconnecting the counter shaft from the driving element. This provides a safety device such as will eliminate any possible danger of the machine being demolished or the Patented J une 4, 1918.

bearings injured, due to sudden and unexpected overloads. i

Mounted on the shaft 7 is a drum roll 13, around the periphery of which is arranged a series of segmental plates 14, which are preferably formed with crushing teeth. These segmental sections 14 are fastened to the roll 13 by means of radial bolts 15. The roll 13 is driven by a gear 16 mounted on the end of the shaft 7 opposite to the end of the machine on which the pulley wheel 11 is mounted. A pinion 17 is fastened to the end of the counter shaft 8 opposite to that on which the hub 9 is keyed, and engages with the gear 16, thereby furnishing driving means for the Crusher roll.

A hopper casing 18 is mounted on the upper portion of the frame and has attached to its ends, by means of removable bolts 19, end plates 20 which serve to inclose the upper portion of the roll. This construction provides a removable plate which,

when in place, seals the chamber within which the roll operates, thereby preventing the escape of dust, and also, because of its easy removal, allows access to the bolts 15 so that the segmental sections 14 may be removed without dismantling the entire machine.

Formed on the counter shaft 8 are eccentrics 21 upon which is pivotally supported a breaker plate 22 which has across bar 23 attached to its lower end. The projecting ends of the cross bar 23 engage links 24 extending radially toward the shaft 7 and attached at their upper ends to the lever bars 25 fulcrumed on the pins 26 fixed in the frame castings 1 and 2. The lever bars 25 are connected at their rear ends to the adjusting rods 27 which are provided with screw nuts-28 by the manipulation of which the distance between the lower end of the breaker plate and the Crusher roll may be adjusted to regulate the size of the product. Between the adjusting nuts 28 and the frame of the machine are interposed compression springs 29 to form cushions to relieve the machine from shocks due to the accidental introduction of material which can not be crushed.

`Then the shaft 8 is rotated the eccentrics 21 will impart to the upper portionof the breaker plate a yratory motion by -which it will coact wit the Crusher roll as a jaw crusher to break up the larger pieces of coal. The lower portion ofthe breaker plate, swinging on the links 24 in a path approximately arallel with the surface of the roll, will hold the resulting fragments to be ground by the teeth of the crushing roll.

What I claim is:

v l. In a crushing apparatus, the combination with a supporting frame, of a crusher roll therein, an approximately vertically arranged concave breaker plate adjacent the roll, a swinging link pivoted to the lower end of the plate and having its pivotal support, its pivotal connection to the plate and the lower end of the plate all in a plane radial to theroll axis, resilient means for holding they link in workin position and adapted to permit it to yiel outward in the said radial plane, a power actuated shaft adjacent the upper end of the plate, and a rotary cam carried by said shaft which imparts ower to the plate in all radial directions om the shaft axis, the inner concave surface of said plate being extended to points above the horizontal plane of the shaft axis whereby the upper part of the plate is positively forced downward toward the roll axis.

2. In a crushing apparatus, the combination of a revolving crusher roll, a gyrating breaker plate having an operative concave surface extending from a horizontal plane below the roll upward to a horizontal plane above the roll, a pivotal support for the lower part of the plate, resilient means for yieldingly holding the pivotal support and the lower part of the plate in operative position against the pressure of the material being crushed, and means connected to the upper part of the plate for positively driving said plate downward, inward, outward and u ward.v

3. n a crushing apparatus, the combination with a revolving crusher roll, of a gyrating breaker plate having an operative concave surface extending from a horizontal plane below the roll to a horizontal plane above the roll, its lower end being mounted to move vertically and to move radially relatively to the roll, and a power shaft having its axis in a horizontal plane below the second mentioned horizontal plane and adapted to positively impart power to the plate during the entirety of each revolution.

4. In a crushing apparatus, the combination with a supporting frame, of a crushing roll, a hopper having a chamber or passage through which material is guided toward the roll, a concaved breaker plate adjacent tion with a supporting frame, of a lcrushing j roll in the frame, a concave breaker plate adjacent the roll, a hopper or passageway through which material is guided toward the roll, a concave breaker plate having its lower end supported near the operative surface of the roll and having a projection integral with its upper end and extending into the said passage, the concave breaking surface of the plate including the surface of the said projection, a power shaft, and power transmitting devices positively engaging with the plate throughout .the entirety of each revolution of the shaft and causing the said projection to move inward and outward .in the passage and advance material toward the roll and to move downward toward the roll to crush the said material supplemental to the crushing action of the plate caused by its motion inward toward the roll.

6. In a crushing apparatus, the combination of a supporting frame, a crusher roll, an upright breaker plate having a concave working surface adjacent the crusher roll, means for pivotally supporting the lower part of the crusher plate, and means for moving the upper partvof the plate inward and outward and upward and downward, the said pivotal supporting means for the lower part of the plate being adapted to perf mit the plate to yield outward from the roll independently of the movement of the upper part of the plate.

In testimony whereof, I affix my signature, in presence of twowitnesses.

WILLIAM K. LIGGETT.

Witnesses:

STANLEY F. OssINo, DUDLEY T. FISHER.

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