US1277377A - Sanding-machine. - Google Patents

Description

R. L. CARTER.

SANDING MACHINE.

APPLICATION FILED MAR. 25. ms.

Patented Sept. 3, 1918.. 2 SHEETS-SHEET I l/VI/E/VTOR Ray L. Carfer R. L. CARTER.

SANDING MACHINE.

APPLICATION FILED MAR. 25. I9I8. 1 27?,377 Patented Sept. 3,1918..

2 SHEETSSHE ET 2.

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' an n. owns, or sense, new roan 1 To all whom it may concern:

Be it known that I, RAY L. CARTER, a citizen of the United States, residing at Syracuse, in the county of Onondaga" and State of New York, have invented certain new and useful Improvements in Sanding- Machines, of which the following is a specification.

This invention relates to improvements in sanding-machines, designed particularly for use by pattern-makers, wood-workers, and

the like, for grindingand finishing surfaces not accessible to the usual disk sanders in common use.

The object of the invention is to provide a novel, simple, convenient and compact sanding device of the oscillating spindle type, which is capable of being operated at high speed bya directdrive and which is light and durable, and wherein a comparatively small number of parts are employed for the operating mechanism. A further object is to provide novel and simple means for efi'ecting the oscillation of the spindle.

And a flurther object is to generally improve, simplify and .cheapen the construction and operation of sanders of the class.

I attain these objects by the means .set forth in the detailed description which follows, and as illustrated .by the accompanying drawings, in which.

Figure 1 is a side elevation of the com plete machine, with parts broken away; showing certain details of construction.

Fig. 2v is a horizontal section, taken on line 2-2 of Fig. 1; showing the principal parts employed for oscillating the spindle.

Fig. 3 is a broken central vertical section, taken substantially on line 33 of Fig. 2;

showing the spindle and the oscillating -mechanism.

Fig. 4 is a transverse vertical section,

takenon line 44 of Fig.2.

. In the drawing, 2 represents the main upright body or hollow column, which is preferalbly mounted on a base 3. 4 represents a forwardly projecting detachable hollow body portion secured. to the top front side of the column 2, by bolts 5. The part 4 has a sennmsaonmn Specification of Letters Patent. Patented Sept, 3, 1%118;

Application filed March 25, 1918. Serial No. 224,548. r i

. margin of .which comprises an inverted arcs'haped rack 8, the, said web also having a corresponding arc-shaped slot 9, by whlch.

the table is. guided when tilted or rotated vertically. 10 represents a threaded stud or bolt carried by the body 4, which passes spindle, which extends some distance above the top surface ofthe table. The portion of the spindle projecting above the table is preferably covered with a layer of heavy sand-paper, or other suitable abradant 18 in the usual manner. The spindle 13 extends downwardly. throughthe body portion 4, and first passes through-'2. cap 14; which is screwed into the open top of the body 4, and directly beneath the said cap there is a sleeve 15 mounted on the spindle 13, the said spindle being movable vertically in said sleeve, for oscillating the spindle-sander 13, by means of a feather or key 16, which also serves to drive the said sleeve. The'upper' end of the sleeve 15 is rigid in a ring 17 which is a part of a ballbearing, consisting of rings 17 and 18 and a series of balls 19. The ball-bearing parts preferably rest upon a horizontal ledge 20 of the body 4, and are held in' place by the cap14, which holds the larger ring 18 sta- .bearings 24.-24', which are suitably supported in the body 4, as at 25-25: The main spindle '13 extends downwardly beyond the worm 21 and its lower end is in serted and slidable endwise in a sleeve-coupling 26, which is journaled by means of a ball-bearing designated generally by the numeral-28, the latter being disposed in the lower leg of the body portion 4, between a ledge 29 and a screw-cap 30. The coupling 26 drives the spindle 13'by means of a feather or key 26. ,31- represents an electric motor of conventional form, which is mounted on the upright column 2 and is held in place by a bracket32 and bolts 32. The

armature shaft 31 of the motor is also inand a hand-wheel 38 is employed or. me-

niyiulating said pinion. he spindle 13 which carries the cylindrlcal sander 13 is oscillated vertically, while being rotated by the power of the motor, by a rocking lever 39, which is disposed beneath and substantially at right angles 'to the worm 21 and the shaft 23. One end of the lever 39 extends into the body 2 and is provided with a yoke 40 which straddles flattened portions 41 of a shaft 41, the said shaft bein rockable in bearings 42 in the body 2. ibout midway between its ends lever 39 is pivoted by a pin 43 to the lower end of a link or part 44, the upper end'" of said link comprising a loop 44', in which is disposed a ball-bearing consisting of. a ring 45 rigid in said loop, balls 45', and a smaller concentric ring 46 which is rigid on an ec centric cam 23 of shaft 23, as best seen in Fig. 3. By this construction and arrangement the link 44 is given a vertically oscillating motion, which lifts and depresses the lever 39 once every revolution of the shaft 23. The opposite end of the lever 39 comprises a large'yoke 47, which straddles the spindle 13 and is pivoted to a circular bearing-holder 48, by pivot screws 48 (see Fig. 2). The holder 48 has a circular cavity or socket in its top side, in which is disposed a ball-bearing, consisting of a member 50, which is rigid in the holder, balls 50, and a smaller concentric member 51 which is rigid on the spindle 13 and movable therewith. The spindle 13 has a shoulder 52 which engages the top of the member'51, and a reduced portion 0 the spindle continues downwardly through the holder 48 and a collar 53, the latter being disposed directly beneath the holder. A pin 54 secures the collar 53 to the spindle. By this construction and arrangement, the upward movement of the rocking lever 39 lifts the spin- .dle, while the downward movement of said lever de resses the spindle. In Fig. 3, the rocking ever 39 is shown in the central osi- H tion by the full lines, while the dotted ines w-b indicate the up and down movements of the lever for reciprocatin or oscillating the spindle 13, as well as t e sander 13.

The full and dotted lines at the top of Figs. 1 and 3 show the extent the sander 13 may be oscillated while erformin or polishin work, By the roc ing ever 39. When the fever 39 is rocked up and down, as described, the end 40 of said lever slides on the flattened portion 41' of said shaft 41. This provision is necessary in order to allow the opposite end of lever 39 to move with the spindle 13 to the extremes of its strokes indicated by the dotted lines a---?).

In practice the motor is preferably operated at about 1800 revolutions er minute, and being connected directly wii h dle and sander, the latter rotate at the same speed. At the same time, the reciprocations of the spindle, owing to the reduction effected by the worm-and-gear mechanism,

number from 50 to 100 revolution per minwormear. I

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is-

1. The combination with a source of power, of a spindle supportinga cylindrical sander, a worm and gear driven by said spindle, said spindle slidable in said worm for oscillating said sander, a rocking lever for reciprocating said spindle, and means for operatively connecting said lever with said gear.

2. In an oscillating spindle sander. a rotatable spindle, a sleeve in which said spindle is reciprocatable driven by said spindle, said sleeve comprising a Worm, a rocking lever for reciprocating said s indl e, a gear driven by said worm, a cam-s aft supporting and operated by said gear, and means for operatively connecting said cam-shaft with said rocking lever.

3. In a sanding machine, a spindle supporting a cylindrical sander, a sleeve for driving said spindle, a second sleeve surrounding and driven by said spindle, said second sleeve comprising a worm, a wormgear driven by said worm, a shaft supporting and driven by said gear, said shaft having a cam, a link engaged and operated by said cam, and a lever rocked by said link, one end of said lever connected to said spindle adapted to reciprocate said spindle in said sleeves.

In testimony whereof I aflix my signature.

RAY L. CARTER.

its rindingthe spin- I

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