US2167954A - Bolting means for grinding machines - Google Patents

Description

-Aug; 1, 1939.

H. J. MANKOFF BOLTING MEANS FOR GRINDING MACHINES 2 Sheets-Sheet l FiledyJuly 10, 1957 IN VENTQR. J ffA/VAMF BY fiZWH Y AITORNEYI Aug. 1, 1939. MANKOFF 2,167,954

BOLTING MEANS FOR GRINDING MACHINES Filed July 10, 1957 2 Sheets-Sheet 2 FIG. 5 Fit/.5

ATTORNEY Patented Aug. 1, 1939 UNITED STATES PATENT OFFICE BOLTING MEANS'FOR GRINDING MACHINES Henry John Mankoff, Wichita, Kans. Application July 10, 1931, Serial No. 152,964

1 Claim.

This invention relates to improvements in bolting means for substance ground by a machine and has for its chief object the ability of producing a finished product at one operation of 5 grinding, that is to say, no by-products are prosecured in working relation to a rotatable grind- I er trunnioned in the machine at the axis of the frame, and the said frame being so arranged will also receive and firmly bind in like position, a finely woven wire screen as bolting means for all of the substance being ground.

A still further object of my invention is to provide an adjustable frame as supporting means for a woven screen, clamping the entire peripheral edge securely to avoid intermediate sagging of the screen during the grinding process, the screen, however being free to vibrate,

facilitating its sifting or bolting efficiency.

These and other objects will hereinafter be more fully explained, reference being had to the accompanying drawings forming a part of this specification and in which like characters will apply to like parts in the different views.

Referring to the drawings:-

Fig. 1 is a sectional view through the grinding machine showing the installation of the frame in working relation to the grinder.

removed and other parts of structure for convenience of illustration.

Fig. 3 is an end view of the frame.

Fig. 4 is a plan View of Fig. 3.

Fig. 5 is an end view of the screen, showing the bent position of its oppositely disposed straight edges.

Fig. 6 is a plan view of Fig. 5.

Fig. '7 is a vertical sectional view through one 45 end of the grinder housing and screen frame.

Fig. 8 is a similar view to Fig. '7, omitting the frame and screen.

Fig. 9 is a sectional view taken on line 9-9 in Fig. 3, one end of the frame removed.

Fig. 10 is an enlarged sectional view at the top of the frame, showing the method of bending the screen to its clamped position by a rocking movement of the hood enclosure for the hammer grinder.

My invention herein disclosed consists of a.

Fig. 2 is a plan view of Fig. 1, the grinder frame element comprising two semi-circular ends -I, said end members being connected. by angle bars 2 respectively, and a rod 3 medially connecting said end members, the said frame pendently supported by bolts 4, secured to said bars and upwardly extending to engage through inturned portions 5, of sides 8, the said sides having end units 1 secured thereto, functioning as an external housing for'the base of the grinding machine, While the said frame is enclosed by an internal housing 8, extending to and being "connected to ends 1, respectively, and to said sides as at A, the last said housing to receive the ground substance bolted through screen 9, positioned 'on the inside of said frame andsecured therein as follows.

The said bolting screen may be cut or manufactured in width to extend flush with the o-ut side of each arcuate end I, of said frame and being curved to seat snugly upon the inside periphery thereof, while each side extends a short distance above its: respective bar 2 of the frame and is bent outward thereon as shown at B in Figs. 1 and 2.

The said'bolting screen being thus placed on the frame and secured thereto, as later described, will be positioned in working relation to a rotatable grinder X as shown in Fig. 1, and the positioning of which will automatically secure both end edges between the inner edge of the semi-circular end members and their respective arcuate shoulders 1, against which the frame ends are tensioned by said bolts 4; and the outward bent portions of the screen. as at B at each side are also automatically secured by rocking hood 10 on its pivot C, to a closed position over grinder X, said hood being secured to snug engagement by anchor bolts H, while the rim portions adjacent their respective sides. of the screen will seat firmly thereon, securing the said side portion rigidly to bars 2.

In Fig. 5 is shown, a marginal edge portion of the bolting screen turned outward as shown by dotted lines B, one side of which it is convenient to turn downward on its respective bar, while the other side is adjacent the hinged point of the hood. In the case of the latter, the edge of said hood, as shown by its dotted line of travel, will contact the upper edge of the screen, bending it outward and downward as shown by dotted lines, as the hood is rocked to its closed position, clamping the same firmly to its respective bar member 2, while the other side is secured by the free edge of said hood resting thereon as shown in Fig. 1.

relation to a rotatable hammer grinding cylinder; furthermore, the said adjustably positioned frame as constructed, will permit the installation of a finely perforated metallic sheet positioned in said frame and supported thereby, in which case, the said frame is placed on a lower plane,

and the securing of the sides and ends of said sheet is not required, however the said sheet is forced to conform with the arcuate interior of the frame by the hood contacting each side,

forcing the same downward at the time of tensioning the anchor bolts heretofore described.

Attention is directed to the fact that the perforations of the metallic sheet are not as impervious as the finely woven screen with respect to bolting or sifting of the substance passing therethrough as ground, and the flexing tendency of the screen is a means to agitate it sulficiently to avoid congestion; and as heretofore stated, the woven strands of the screen afiord a finely interrupted surface against which the substance being ground will contact, co-operating with the grinding cylinder, and to maintain uniformity of the arc of the screen, the peripheral edges thereof, are firmly secured to the frame as heretofore described.

Such other modifications may be employed as lie within the scope of the appending claim, and having fully described my invention what I claim as new and desire to secure by Letters Patent is:

A structure of the character described comprising a casing having rigid end members, side members connected with the end members, arcuate, inwardly extendingflanges formed on the end members, the ends of said flanges terminating adjacent the upper edges of the end members, said side members having inturned horizontal flanges,'jai hood for said casing pivotally connected with one horizontal flange and adapted to' close the upper end of said casing, means for locking said hood in closed position, a frame device arranged in said casing and comprising semi-circular end members rigidly connected in spaced relation by angle bars at their upper ends, the upper edges of the semi-circular members formed upon an arc corresponding to the arc of the end flanges and adapted to engage therewith,

a sheet of wire gauzing arranged in said casing .with two opposite edges engaging beneath the endfianges, bolts carried by the said flanges and engaging the angle bars for rigidly binding the edges of the gauze between the end flanges and the arcuate, upper edges of the frame ends, the

opposite edges of the gauze extending above the frame bars andbent thereover, said hood when in its closed position adapted to bind the free edges of the gauze upon the angle bars.

' I ENRY; JOHN MANKOFF.

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