US1780112A - Mill - Google Patents

Description

i Oct. 28', 1930. R, H, BowMAN MILL Filed July l0. 1929 ,ze INVENTOR. l (2f af/fr //a MMM y By MM -p/P'Q,

' ATTORNEYJ.'

Patented. Oct. 28,`r 1930 UNITED STATEs PATENT oFFicE ROBERT H. KBOWMAN; OF AKRON, OHIO, .SSIGNOR TO llll? FIRESTONE TIRE & RUBBE COMPANY, OF AKRON, OHIO, CORPORATION OF OI-IIIIO` llllIILLy Application filed July 10,

' 10 safety device in theform of a frangible disk or plate between the movable arbor of an adjustable roll and the adjusting means, said disk or plate being adapted to break under a heavy strain such as might be caused by some hard object finding its way into the mill so that said object cannot break or injure the expensive mill rolls, bearings or some other part of the mill. j

Heretofore in general, the use of such frangible disks or plates has rendered adjustment of the mill rolls and replacement of broken disks somewhat difficult. A screw has usually been provided for adjustment but it could only .be used to adjust the rolls in one way, that is toward each other, and other means had to be employed to adjust the rolls the other way. Means have been more recently utilized which overcome these 4difficulties tovsome extent but such means are not entirely satisfactory. Thepresentinvention has for its object the provision of an improvedmillr roll adjusting devicefin which the safety'y plate is incorporated in such a way that rthe roll or 35,. rollsof a. mill may beadjusted both-toward and from each other without aecting the functioning'v of the safety means if the mill should become overloaded for any reason, and in which the safety plate is so mounted as to be quickly replaceable. j The foregoing yand otherobjects of the invention are attained in the mill illustrated in the accompanying drawings and described below. lt is to be understood that the inven- 4s .tion is notlimited to vthe'speciiic form thereof shownand described. Y

Of the accompanying drawings, l Figurev 1 .isy a front elevation ofa mill in which the invention may be embodied;

SQ Figure Qis an enlarged view partly in 1929. Serial No. 377,286.

section along line 2-2 of Figure 1 showing the invention embodied in the mill;

Figure 3 is a section on line 3-3 of Figure 2; and

Figure 4 is `a detail elevation of the twopart frangible plate.

`Referring to the drawings, theusual mill includesk a bed plate 10 provided with standards 11, 11 in which are journaled rolls 12 and 13, the formerin adjustable arbors 14; so as to be slidabletoward and from the latter on standards 11.

An adjusting screw 15 is threaded through a nut 16 in each of standards 11, the outer end of each screw having a turning head 17 which may be apertured as at 18L to receive a bar (not shown) for turning the same. The

j inner end of each screw 15 is formed with a groove 19 and extends into a cap 20 secured to each arbor 14. Cap 2O is formed with transverse slots 21, 21, whereby it is adapted to receive afrangible plate 22 made in two parts, (Figure 4) and adapted to be slid into the slots 21 from opposite sides, the inner Yends ,of the plates being shaped to fit in the groove 19,' whereby when the plates are inplace they embrace the screw 15Lk in groove 19. To prevent displacement of the lplates 22 suitable means such as hooks 23 pivoted'as at 241 on the caps 2O may be hooked over studs 25, 25 on the outer ends of plates 22..

It will be seen that because of engagement of plates 22m groove 19 adjusting the rolls 12 land 13 either together or apart is obtained through the safety plates 22 in which the screws 15 rotate.- Should a plate 22-be broken toprevent injury to the millby rea.- son of an overload, 'it may be quickly re-n placed by swinging back hooks 23, removing from slots 21and slidingkout of-the caps20v and new plates replaced therefor.

It will be apparent from the foregoing that asimple, effective' safetydevice has been provided for kmills which permit ready ad` justment of the'mill rolls and the frangible plate which is easily replaced in case of breakage. j Y y j f Modifications of the invention may be resorted to without departing from the; spirit eay lee

thereof or the scope of the appended claims.

Vhat is claimed is: 1. In a mill, an adjustable mill roll and means for adjusting said roll including a screw, a safety cap connected to the roll, said screw extending into said cap and hav'- ing a peripheral groove adjacent its end in the cap, said cap having slots therein, and a two-part frangible plate slidable from opposite sides of the cap in the slots into embracing relation to the screw end and engagged in said groove, whereby said roll is adjustable in either direction by said screw through said frangible plate, and means for releasably retaining said plate in said cap, said means comprising pivotal hooks mounted on the cap and engageable over studs on the outer edges ofthe 'rangible plate.

2. In a mill, an adjustable mill roll and means for adjusting said roll including a screw, a safety cap connected to the roll, said screw extending into said cap and having a peripheral groove adjacent its end in the cap, said cap having slots therein, and ay two-part frangible plate slidable from opposite sides of the cap in the slots into embracing relation to the screw end and engaged in said groove, whereby said roll is adjustable in either direction by said screw through said frangible plate, and means for releasably retaining said plate in said cap.

3. In a mill, an adjustable mill roll, means for adjusting said roll, a safety cap connected'to the roll, a two-part frangible plate slidable from opposite sides of the cap into inter-engaged relationship with said adjusting means, whereby said roll is adjustable in either direction through said frangible plate, and means for releasably retaining said plate in said cap, said means comprising pivotal hooks mounted on the cap and engageable over studs on the outer edges of the frangible plate.

4. In a mill, an adjustable mill roll and means for adjusting said roll including a screw, a safety cap connected to the roll, said screw extending into said cap andy having a peripheral groove adjacent its end in the cap, said cap having slots therein, and a two-part frangible plate slidable from o pposite sides of the cap in the slots into interengaged relationship with said adjusting means and engaged in said'groove, whereby ysaid roll is adjustable in either direction by said screw through said frangible plate, and means for releasably retaining4 said plate in said cap. Y

5. In a mill, an adjustable mill roll and means for' adjusting said roll including a screw, a 'safety cap connected to the roll,

Vsaid screw extending into said cap and having a peripheral groove adjacent its end in the cap, said cap having slots therein, and a two-part frangible plate slidable from opposite sides of the cap in the slots into inter# in inter-engaged relationship with said ad;-

justing means, wherebysaid roll is adjustable in either direction through said frangible plate.

In witnessv whereof I have hereunto affixed my signature this 5th day of July, 1929.

ROBERT H. BOIVMAN.

Images