US1365924A - Sandpapering device - Google Patents

Description

H. LAGERQUIST vAND J. P. ANDERSON. SANDPAPERING DEVICE.

A119911121111011' man 111111119. 1919.

UNITED STATES vPATiazNT ori-ica- HENRY memursfr AND JULIUs r. ANDEasoN. or DES norNEs, Iowa.

sANDrArEmNG DEVICE.

'A vSpeeile'tiou of I-.etters Patent. .Patentd Jan. 18, 1921 Application ined umn 1s, vwie. i semi No. 298,293.

simple, durable and inexpensive construction. j

More particularly it is our object to provide a sandpapering device of comparatively light weight which includes a suitable handle for manipulating the device and a reciprocating member adapted. to receive a sheet of sandpaper, which may be readily installed or removed for replacing wit other sandpaper. i

With these and other objects in view our invention consists in the` construction, ar-

Vrangement and combination of the various parts of the device, whereby the objects contem lated are attained, as herein more fully set orth, pointed out in our claims and illustrated in the accompanying drawings, in which. y

Figure 1 shows a side elevation of a salidpapering device embodying our invention.

Fig. 2 shows a lon itudinal, vertical, secv tional view through t e same.

Fig. 3 showsa horizontal sectional, view taken on the line 3--3 of Figl 1.

Fig. 4 shows a detail, sectional View taken on the line 4-4 of Fig. 2.

Fig, 5 shows a plan view of the upper sur- .lfilicel-{of one end of the sandpaper holding Fig. 6 shows a detail, sectional view taken through one of the plates of the device illustrating the sliding mounting of the reciprocating member to which the sandpaper l holding block is secured..

In the accompanying drawings, which illustrate a Iform in which our power operated sandpapering machine may be embodied, we haveused the referenceA numeral 10 to indicate generally the upper member of our device, which, for convenience we will call the cover.

The cover 10 has at its forward and rear` ward ends downwardly extending flanges 11 and 12, and at its sides downwardly extendin anges 13 which are shorter than the en fianges.

On the cover 10 is a gear casing member 14 from whichprojects a handle 15 which i has a central bore forming a journal for a shaft 16. The shaft 16 is mounted in ball 4bearings 17 and 18 inthe handle 15 and the gear casing 16. The outer' end of the. shaft 16 is connected with a fiexble shaft 19.

`On the inner end of the shaft 16 within the casingl 14 is a beveled gear 20. A short shaft 21 is mounted in the cover 10, and hasI mounted on it within the device'a beveled gear 22 which meshes with the gear 20.

Fixed on the lower Aend of the shaft 21 is an arm 23. 'Secured to the arm 23 isa downwardly projecting shaft 24 having on its lower end a head 25 provided with a screw-driver slot 26.

Y On the shaft 24 is a sleeve or bushing 27. The shaft 24 projects through a plate 23 which vhas a laterally elongated slot 2%), surrounding which is an upwardly extending rib for forming a better bearing for the. shaft 24.

Suitably supported on the flanges 13 above the plate 28l are shafts 31 on which are. roller bearings 32 or other suitable anti-friction devices.

Just rearwardly of the roller 32 'adjacent to the handle 15 is a downwardly extending flange 33, and just forward of the forward roller 32 is a downwardly extending flange 34. The purpose of these Hanges will be hereinafter more fully explained. j

' Secured to the flanges 13 by means of screws or the like 35 are side-1 )lates 36,

which projectbelow the flanges 13 and have. at their lower edges inwardly extending spaced pairs of flanges 37. The two fianges.

on each side-plate 36 forni a guideway in whichare mounted antrfrirtion rollers 38. The side ed res of the plate 28 are. mounted in said gui eways, as clearly illustrated in Figs. 2 and 4.

Secured to the under surf aco of the pla-tc 28 is a sandpaper holding block 39.

The sandpaper holding block 3i) is secured to the plate 28 by means of screws 40, the

heads of which are countersuiik in the block device.

-jecting ends of the bolts 44 is a strip 45.

The sand paper may be provided with holes to receive the bolts 44.

By screwing the nuts 46 on to the ,bolts 44v one end of the sand paper may be frmlly; gripped between the strip 45 and the bloc 34. The block 39 is provided with rabbets at its sides in its upper surface to receive the lower flanges 37 and the lower edges of the side-plates 36, as illustrated in Fig. 4, and to form guides for the. reciprocating movement of the sandpaper block.

Formed on the outer surface of the flanges 11 and 12 are ribs 49 to protect the In the practical operation of our improved power operated sandpapering device it will be understood that the shaft 19 is connected with a suitable source of power, whereby rotation may be imparted to the shaft 19 and the shaft 16.

Rotation is imparted from the gear 20 to the gear 22, and thence t o the shaft 21 for operating the arm 23 as a crank.

As the arm 23 swings around in a circle, centered at the center of the shaft 21, the shaft 24 is swung around in the slot 29 for glie plate 28 and to the sandpaper holding ook.

The flanges 33 and 34 help to keep dust from the sandpaper away from the gearing ofthe device.

It will be seen that the. device may be readily and easily taken apart for repair or for replacing any 'parts that may become The shaft 21 has its upper end screwthreade'd to receive a nut for readily installing or removing. the shaft and the gearing.

departing from the essential features and purposes of our invention, and it is our intention to cover by our clanns any modiplate,

fied forms of structure or use of mechanical equivalents which may be reasonably in eluded within the scope of said claims:

e claim as our invention:

1. In a device of the class described, a cover member, having downwardly extending front, and back and side flanges, a handle on said cover member, extending away therefrom, a removable guide on each of said side flanges, a plate slidably mounted in said guides, having a laterally elongated slot therein, a shaft mounted in said handle, a gearing device thereon, an upright shaft mounted in said cover, a gearing device thereon in mesh with said first gearing device, an arm on said second shaft, a third shaft mounted in said arm and projected into said slot, and means for mounting an abrading device on said plate.

2. In a device of the class described, a cover member, having downwardly extending front, and back and side dle on said cover member, channeled guide devices mounted on said side flanges, a plate mounted for longitudinal reciprocation be* tween said flanges, and having its edges received in said guide devices, means for imparting reciprocatory movement to said means for supporting an abrading device on said plate, said means comprising a block detachably mounted on the under surface of said plate, said block having in one end a slot and having at the other end an thereby imparting reciprocating motion to adjustably supported strip, a sheet of abrading material having one edge received in said slot and having its other end received between said strip and said block.

In a device of the class described, a cover member, having downwardly extending front, and back and side flanges, a handle on said cover member, channeled guide devices mounted on said-side flanges, a plate mounted for longitudinal flanges, a hanreciprocation between said flanges, and having its edges received in said guide devices, means for imparting reciprocatory movement to said plate, means for supporting an abrading device on said plate, anti-friction rollers mounted on said cover, and designed to bear on the top of said plate when said device is in use. I.

Des Moines, Iowa, `May 14, 1919.

HENRY LAGERQUIST. JULIUS P. ANDERSON.

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