US1856126A - Buffing machine - Google Patents

Description

May 3, 1932. F. E. BERTRAND BUFF-ING MACHI NE Filed June 24. 1927 /N VEN TUF? Patented May 3, 1932 UNITED @"l'rhlhd PATENT OFFICE FREDERIC E. BERTRAND, F LYNN, MASSACHUSETTS, ASSIGNOR T0 UNITED SHOE MA- CHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY IBUFFING- MACHINE Application filed June 24, 1927. Serial No. 201,243.

This invention relates to butting machines and is herein illustrated as embodied in a Naumkeag butting machine of the type shown in United States Letters Patent No. 849,388

' granted April 2, 1907 upon the application of A. Rogers.

Buffing machines of the Naumkeag type having relatively coarse and fine disk-like abrasive tools mounted side bv side upon the 10 lower ends of vertical spindles are employed for bufling the bottoms and shanks of shoes. In certain cases, as, for example, where the shoe (considered in inverted position) has a Cuban heel in which the breast is not normal to the shank so that it overhangs the joint between the breast and the shank, it is not convenient to treat the shank of the shoe close to the breast of the heel with the regular tools provided on the machine because of the interference between the overhanging breast and the spindles of the tools. This interference is avoided by the use of Naumkeag machines of the type disclosed in United States Letters Patent No. 1,806,626,

granted May 26, 1931, upon the application of E. F. Hodgkins. In the machine disclosed in that application, there is provided, in place of one of the regular tools, an auxiliary tool mounted upon the lower end of a short vertical spindle and adapted and constructed to treat the shank close to the heel breast, the short spindle carrying the auxiliary tool being rotated at high speed whenever the machine is in operation by a driving connection with an offset parallel spindle passing ject of this invention to provide an improved bufling machine which will be so organized that it will be entirely practicable to employ relatively coarse and line buffing tools in addition to the auxiliary tool without requiring the operator to reach too far in presenting the work successively to the various tools, and which at the same time will be so constructed and arranged that the auxiliary tool will not be in the operators way when he presents work to either of the main tools of the machine. To this end, the illus trated buffing machine is provided with an auxiliary tool mounted on a movable bracket which may be swung to carry the auxiliary tool into an operative position adjacent to but offset from the main tools, or may be swung aside to avoid interference with the work when it is presented to either of the main tools. Preferably, and as illustrated, the tool is normally held in inoperative position, means controlled by the operator being provided to swing the bracket and carry the auxiliary tool into operative position whenever desired.

In regular factory use the bulk of the Work of bufiing soles and shanks is preferably performed by the use of one or both of the main buiiing tools since these, because of their relatively large diameters, are adapted for buffing more rapidly. Accordingly, the auxiliary tool is usually operated intermittently for short periods of time only. With this in mind, to avoid unnecessary wear of the auxiliary tool driving parts, movement of the illustrated bracket to carry the auxiliary tool out of operative position unclutches the auxiliary tool from its driving means, reverse movement of the bracket to carry the auxiliary tool into operative position restoring the driving connection.

In the drawings,

Fig. 1 is a front elevation of a portion of a Naumkeag butting machine showing one of the main tools of the machine and my novel auxiliary tool support;

Fig. 2 is a plan view of this portion of the machine Fig. 8 is a side elevation looking at the left side of Fig. 1 with parts broken away; and

Fig. 4 is a vertical section through the auxiliary tool. a

Only one tool 10 of the usualpair of diskshaped main tools of a Naumkeag bufiing machine is shown in Fig. 1. This tool 10 is carried by the lower end of a vertical spindle ill) 12 which is journaled in bearings 14 and 16 in the frame 18 of the machine and a connection 20 is provided at the top of the spindle so that air may be supplied through said spindle to inflate a' tool carried thereon when it is of the inflatable type. A driving connection for this spindle is provided by means of a pulley 22 on the spindle 12 and a belt 24, and a suction hood 26 is positioned at the rear of said tool 10.

1 An auxiliary buffing tool 30, also, disk: shaped, and of relatively small diameter so that it is effective, independently ofthe main tool, for treating the shank of a shoe 32 having an overhanging Cuban heel 48 is mounted upon the lower end of a short spindle 34 (Fig. 4) journaled in a casing 36 which serves also as a bearing for a parallel drive shaft 38 connected to the short spindle 34 by means of intermeshing gears 40. A removable bottom cover 42 is secured to the lower end of the casing 36 and serves to retain the short spindle in the casing. Lubrication is provided by means of a felt pad 44 secured to the casing 36 adjacent to the top of the spindle 34 and abutting the shaft 38. It should be noted that the casing 36 and the pad 44 are cut away at 46 to avoid interference with the breast of the heel 48 of the shoe 32. The auxiliary tool 30, together with its casing 36 and driving gears 40, is similar to the tool disclosed in the above-mentioned Letters Patent No. 1,806,626.

The auxiliary tool 30 is mounted in a movable bracket 54, its casing 36 being extended upwardly in the form of a sleeve 50 which is clamped in the bifurcated outer end 52 of the bracket 54, the inner end of which is bifurcated to form an upper arm 56 and a lower. arm 58.' These arms fit closely around an extension 60 of the frame of the machine and are pivoted upon a pin 62 which is held in said extension by a set screw 64.' The displaceable bracket 54 is normally yieldingly urged to a position (indicated in dotted lines in Fig.

2) to move the auxiliary tool to a position where it will not interfere with work being presented to the tool 10, by means of aspring 66 surrounding and secured at one end to the upper end of the fixed pin 62. The other end of the spring 66 is attached to the bracket 54. An operator-controlled means including a treadle-operated rod 70 is provided for moving the auxiliary-tool bracket 54 to bring the tool into convenient operating position adjacent to but displaced from the main tool 10 when itis desired to use the auxiliary tool; This operating position of V and 3) of a bell crank lever 7 4, the other upundue wear of the small and in full lines in Fig. 2, thereby giving room for the convenient manipulation of the shoe 30 as it. is presented to the auxiliary tool. The treadle. rod70 is'connected to one'arm-72- (Figs. 2.

wardly extending arm 76 of which is provided with a swivel pin 78 joined by a link 80 to a smaller swivel pin 82 at the other end of a crank 84 (Fig. 2) forming part of the bracket 54. The bell crank lever 7 4 is pivoted upon a lug 86 (Figs. 2 and 3) formed upon theframe extension 60. When the bracket 54 is biased to inoperative position by the spring 66, its position is determined by the engagement ofa finger 90 (Fig. 2) on said bracket with a stop pin 92 on the extension-60 and when the bracket is moved to bring the tool to operating position, the latter position is adjustably determined by the engagement of a; finger 94 (also on the bracket 54) with an adjustable stop bolt 96threaded in the frame extension 60.

Because of the fact that the auxiliary tool 30 is only intended for intermittent use, it'is desirable to interrupt the driving connection to the auxiliary tool when the latter is in inoperative or displaced position, and to reconnect it when it is in operative position. In the illustrated construction, this connection and interruption are effected automatically upon the movement of the bracket 54 into and out of operating position. As shown, the shaft 38 which drives the auxiliary tool spindle 34 is connected by a belt 100 with a counter shaft 102 journaled in the bracket 54 in the angle between the end 52 and the other end formed by the arms 56 and 58 (Fig. 2). This counter shaft102 is provided with a crowned friction wheel 104 adapted to engage theconcaved face of a grooved wheel 106 on the spindle 12 carrying themaintool 10 thereby to provide a friction. clutch for driving the auxiliary tool. When the opera tor swings the bracket 54 to bring the auxiliary tool 30 into operating position, the friction clutch will be closed by bringing the crowned wheel '104 into engagement with the grooved wheel 106. This arrangement for the interruption of the drive of the auxiliary tool 30 is especially desirableto save gears 40 which turn at high speed.

When the operator has buffed the shank of the shoe 32 as completely as can convenientlybe done uponthe main tool 10 or its conipanion tool (not shown) of the machine, he will depress the treadle rod 70 thereby bringing the auxiliary tool 30 into operating position adjacent to but offset from the illus-v trated tool 10 so that said auxiliary tool 30 may be used to complete the treatment of the shank of the shoe close-up to the-breast of the heel 48. As the bracket 54 is'swung,

upon the depression ofpthe treadle rod'70, the

friction clutch will be closed to start driving the auxiliary tool 30 and as soon as the pressure on-the treadle is released,the driving connection .will be. interrupted as the bracket 54 is yieldingly urgedinto inoperative posi tion by the action of the spring 66 acting on the arm 56.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a shoe buffing machine, a main diskshaped bailing tool having a radial face, an auxiliary disk-shaped butting tool having a radial work face for independently supplementing the work done by the main tool and movable from a convenient operating position adjacent to and axially ofl'set from the main tool to an inoperative position in which it will not interfere with presentation of shoes to the main tool, means for determining both said operating position and said in operative position of said auxiliary tool, and a driving connection between said tools rendered ineli'ective by the movement of the auxiliary tool out of operating position.

2. In a shoe bufling machine, a main bufiing tool mount-ed upon a spindle, a high speed auxiliary butting tool mounted upon another spindle for independently supplementing the work done by the main tool, movable means normally supporting said last-named spindle in a position out of the way of the operator as he presents shoes to the main tool, opera-- tor-controlled means for moving the auxiliary tool to a convenient operating position adjacent to and axially offset from the main tool, and means for driving said auxiliary tool including a friction clutch constructed and arranged to be rendered ineifective by the movement of the auxiliary tool out of operating position.

3. In a landing machine, a shank bufling tool mounted upon a vertical spindle, an auxiliary shank buffing tool mounted upon a spindle, said spindles being disposed in parallel relation to each other, a drive shaft for said second mentioned spindle geared thereto, a pivoted bracket supporting said drive shaft and said auxiliary tool spindle, a counter shaft journalled in said bracket in ofi'set relation to said drive shaft, means for connecting said counter shaft and said drive shaft, a friction clutch member upon said counter shaft, a cooperating friction clutch 0 member upon the spindle of said main tool, and means for swinging said bracket to bring the auxiliary tool into a convenient operating position adjacent to but offset from said main tool, the swinging movement of the a", bracket being effective to effect engagement of the friction clutch members to drive the auxiliary tool.

In testimony whereof I have signed my name to this specification.

t0 FREDERIC E. BERTRAND.

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