US2177992A - Rouging device for buffing wheels - Google Patents

Description

Oct. 3l, 1939. R. MOON ROUGING DEVICE FOR BUFFING WHEELS Filed June 25, 1938 PI-l 2 sheets-sheet 1 INVENTOR.

(7m/a f5 E, Mao/Y.

ATTORNE%.l

oct. 31, 1939. C. R. MON 2,177,992 Y ROUGING DEVICE FOR BUFFING WHEELS Filed June 23, 1938 2 Sheets-Sheet 2 :rrr

Il l

P 11i.r 4.-

I N V EN TOR. Uff/WM5 i?. Mao/4 ATTORNEYS.

Patented Oct. 31, 1939k UNITED STATES PATENT OFFICE tario Manufacturing a corporation Company, Muncie, Ind.,

Application June 23, 1938, Serial No. 215,390

2 Claims.

This invention relates to a device for applying an abrasive, such as rouge, to a bufiing or polishing wheel, particularly wherein the rouge is in paste-like form.

rlhe object of the invention is to utilize a stick of paste-like rouge adapted to have its end projected against the peripheral bufng or polishing surface of the wheel, and wherein the abrasive or stick of rouge is periodically fed forward and applied to the wheel automatically, preferably through air pressure.

More specifically the inventioncontemplates utilizing a cylindrical barrel mounted radially with respect to the buiing wheel in which the rouge stick is slidably mounted so that the end thereof may be brought in effective engagement therewith, and applying air pressure to the cylinder in such manner that the vrouge will be alternately applied to the wheel and retracted therefrom, and in its `applied position will be rotated and fed forward step by step. Thus, the amount of rouge to be applied may be governed by adjusting the extent of its forward movement in the barrel and the duration of its periodic application to the buing wheel.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims:

Fig. l is a side elevation of the rouge feeding device. Fig. 2 is a section taken on the line 2--2 of Fig. l. Fig. 3 is a section taken on the line 33 of Fig. 2. Fig. 4 is an end elevation of the rouge feeding device. Fig. 5 is a section taken on the line 5-5 lof Fig. 4. A

1n the drawings there is shown a portion of a buhing wheel i!) which is usually formed of a plurality of cloth discs or laminations rotatably mounted upon a shaft Il and partially embraced by a housing l2 provided with an opening I4 through which an abrasive, such as rouge, may be applied to the peripheral buiing or polishing surface of the wheel. Supported upon the housing i2 by means of a bracket l5 there is a pivctally mounted cylindrical barrel l1 having its open end directed toward the opening M in close proximity to the wheel i9, and extending radially therefrom. The barrel is provided with an inner rotative sleeve i8 having longitudinal slots towards the forward end adapted to resiliently grip and slidably support the abrasive or rouge stick 2li, the end of which is adapted to frictionally engage the periphery of` the wheel for applying the rouge thereto,

Mounted at the rear of the barrel l1 there is a housing 2l removably secured to the barrel by a collar 22. Extending axially through the housinor and into the barrel there is provided a threaded rod 23'having a disc plate 24 at the forward end thereof adapted to engage the rear end of the rouge stick for forcing it slidably rom the open end of the barrel. Said rod is freely rotatable and slidable through a head 25 mounted in the rear end of the barrel into which `the sleeve I3 is secured. The housing 2| encloses a ratchet wheel 26 having a boss 21 through which the rod 23 extends and with respect to which it is slidably keyed so that it will revolve with the ratchet wheel but slide axially relative thereto. Said rod is provided with screw threads so as to have threaded engagement with a split boss 28. Said boss is provided with two arms pivotally connected at 29 to the outer end of the housing 2|. The ends of the arms of the boss are clamped together bya member 3B which locks them in their engaging position aboutthe rod 23.

Upon rotation of the rod 23 by action of the ratchet wheel 2&8, the screw threads in the boss 23 moves the rod forwardly so that the plate 24 forces the rouge 20 ,from the open end of the barrel into effective engagement with the buing wheel, said rod freely sliding through the boss 21 and head 25.

The ratchet wheel is rotated throughthe action of a pawl 3l and is engaged for preventing backlash by a spring pressed latch 32. The pawl 3| is pivotally mounted upon a piston 33 and is spring pressed into ratchet engaging position by a spring and plunger 34. The piston 33 operates in a cylinder 35 which is a continuation of the housing 2l, as illustrated in Fig. 2.

To operate the piston 33, there is mounted ed between the xed end of the casing 3G and a ing an air chamber in communication with an air line 31. chamber by air passage through the air line 31 y forces the piston 33 forwardly to cause the pawl 3l to partially rotate the ratchet wheel 26. The pawl is retracted by means of a spring 38 mounted between the iixed end of the casini 36 and a threaded collar 39. The collar 39 is threaded upon a piston rod A0 which is secured to the piston and extends into the air chamber. Thus, upon air being injected into the chamber the piston moves forwardly and upon release of the d air pressure the spring retracts the piston.

The stroke of the piston may be adjusted by an adjusting screw 4I extending through the end of the casing 36. The position of the adjusting screw determines the retracted position of the Air pressure created in said air ,A

lill

piston. When the piston is permitted to be retracted to a greater extent, it will be subject to a longer stroke. Thus, within limits, the adjusting screw 4I may control the length of stroke cf the piston and thereby the extent of rotation of the ratchet wheel and rod 23, resulting in a more extensive movement of the rouge stick 20.

It is desirable to normally withdraw the rouge stick from engagement with the bufng wheel, and to that end the barrel I1 and its associated structure above described is pivotally mounted to the supporting bracket at 42 so as to swing toward and away from the bufiing wheel. For causing said swinging movement there is fixedly mounted upon the bracket I a cylinder 43 having communication with a branch 44 of the air line 31. A plunger-like piston 45 is mounted within the cylinder 43 having its outer end in engagement with a boss 46 secured by a bolt 41 to an exten-rV sion 48 of the barrel I1. On the other side of the boss 443 there is a compression spring 49 held against movement by a .cup 50, as shown in Fig. 5.

Upon an impulse of air being discharged from the branch 44 into the cylinder 43, the piston 45 forces the boss 4S laterally, compressing the spring 49. Such lateral movement of the bess swings the rouge towards the bufiing wheel so that the effective end of the rouge stick is in the position illustrated in full lines in Fig. l. Upon the air impulse being discontinued and the pressure relieved in the cylinder 43, the tension of the spring 43 forces the boss in the opposite direction, which forces the end of the rouge stick away from the bufng wheel, as shown by dotted lines in Fig. l. Thus, the rouge stick is held in contact with the builing wheel upon air pressure being exerted against the piston 45, but is retracted therefrom under tension of the spring 49.

In operation, it will be noted that the rouge stick 20 is sustained by air pressure against the buifing wheel ID for applying the rouge thereto. Periodically air impulses are discharged through the air line 31 simultaneously into the chamber 38 and cylinder 43 for actuating the pistons 33 and 45. The piston 45 will move the rouge stick into engagement with the wheel and it will be simultaneously moved forward to a new position and rotated in the barrel I1 by the ratchet wheel 2G. Immediately thereafter the air pressure is released so that in its newly fed position it is again retracted under spring tension from engagement with the hurling wheel.

It will, therefore, be understood that through a suitable air valve, intermittent air impulses will be discharged through the air line which will result and a new stick of rouge inserted into the sleeve I8 to extend the full. length of the barrel I1.

The rotation or twisting of the rouge stick as it is applied to the wheel is advantageous in that it effects an even wearing of the applied surface of the stick. Such rotation or twisting is obviously eifected by reason of the fact that the stick is frictionally secured in the sleeve I8 which in turn is secured to the head 25, the head being rotated by reason of its screw connection with the boss 21 on the ratchet wheel 26. Thus, as the ratchet wheel is rotated, the sleeve I8 and the stick 20 are rotated therewith.

The invention claimed is:

1. A device for automatically applying an abrasive stick to a bufling or a polishing wheel, comprising a barrel for slidably supporting said stick mounted in position for the end of said stick to engage said wheel, a ratchet actuated screw for slidably forcing said stick from said barrel, a pawl for rotating said ratchet step by step, a pneumatically actuated piston for operating said pawl, and means for adjusting the stroke of said piston for varying the extent of movement of said ratchet and stick upon each periodic movement of said piston.

2. A device for automatically applying an abrasive stick to a buiiing or a polishing wheel, comprising a barrel containing said stick, means for pivotally supporting said barrel end, a spring for normally maintaining said barrel and stick out of engagement with said wheel, a feed screw in said barrel for engaging and feeding said stick forwardly therefrom, a ratchet wheel for actuating said screw and rotating said stick, a pawl for driving said ratchet wheel, a piston for actuating said pawl, means for adjusting the stroke of said piston and pawl for varying the feeding action of said stick on each operation of said pawl, a piston for moving said stick and barrel about said pivotal mounting into engagement with said wheel, and pneumatic means for si multaneously actuating both pistons.

CHARLES R. MOON.

Images