US1421303A - Portable sanding, abrading, and polishing machine - Google Patents

Description

NI. N. PIIANGE. Y

PORTABLE SANDING] ABRADING, AND POLISHING MACHINE.

APPLICATION FILED JULY 20,1920.

1 ,42 1 ,308 Patented June 27, 1922.

2 SHEETSAIIEET I.

TLIIIIIU.

II "I" I l M. N. PRANGE.

PORTABLE SANDINLI, ABRADING, AND POLISHING MACHINE. APPLICATION PILED JULY 20,1920. 1,421,303, Patentedlune 27, 1922.

2 SHEETS-SHEET 2.

.awww/n. Il 6 f msm m DN m M L m ..6 v. M. I f i IIIIIIIIIII I W/TNESSES MAURICE NORVAL IPR-ANGE,

0F DETROIT, MICHIGAN.

PORTABLE SN'DING, ABRADING, AND POLI'SHING MACHINE.

Application filed July 20,

To all whom t may concern.'

Be it known that I, ll/JIAURIOE N. PRANGE, a citizen of the United States, and a resident of Detroit, in the county of lVayne and State of Michigan, have invented a new and Improved Portable Sanding, Abrading, and

olishing Machine, of which the following is a full, clear, and exact description.

The present invention relates to new and useful improvements in surfacing machines, and it pertains more particularly to devices of this character especially adapted for surfacing floors, also forautomobile bodies and furniture.

It is the primary object of the present invention-to provide a plurality7 of surfacing elements, the operating face of which may be provided with any suitable element, such, for example, as sandpaper, brushes, or-the like.

It is a further object of the present invention to provide a means for simultaneously reciprocating said surfacing elements.

It is a further object of the invention to provide a device of this character which is capable of movement over the surface operated upon.

It is a further object of the invention to provide a single power unit foroperating said surfacing elements.

It is a still' further object of the invention to mount .the surfacing elements in such a manner as to reduce the friction of their reciprocal movement.

With the above and other objects in view, reference is had to the accompanying drawings, in whichh Figure 1 is a top plan view of a device constructedy in accordance with the present invention; i

Fig. 2 Vis a sectional view thereof taken on the line 2 2 of Fig.1;

line 3*3 of Fig. 1;

Fig. 4 is a detail sectional view showing the manner of supporting the surfacing elements for reciprocal ovement and taken on the line 4-4 of Fig. 2;

Fig. 5 is a detail top plan view of one of the surfacing elements;

Fig. 6 is a side elevation thereof.

eferring more particularly to the drawings, the device comprises a frame 10 of rectangular form. This frame 10 is provided with a. pair of spaced braces 11 in the form of upstanding webs which extend Specification of Letters Patent.

Ving secured in is adapted tofmesh the transversely extending shaft 21 in order .to rotate said shaft.

Fig. 3 is a sectional view taken on the Patented June 257, 19522. 1920. vSerial No. 397,731.

transversely of the frame as shown in Fig. 1. The frame 10 is supported upon rollers or caster wheels 12, which form the means for rendering the machine portable over the surface operated upon.`

Suitably mounted on the frame isa motor 13, preferably of the electric type, and the armature shaft of said motor has one of its ends projected beyond the casing and carries a bevel gear 14. Mounted on `the frame and secured a plurality of bearings 16, said bearings beplace by means of screw bolts or the like 17. VAs shown inFig. 1, the platform 15 is secured within the lframe 10 by means of clips or brackets 18, and bolts 19, the clips or brackets 18-being carried by the platform 15 and resting on the upper edge of the frame as indicated at 20 in said figure.

Extending transversely, of the machine and mounted in the bearings 16, is a shaft 2l, and said shaft 21 is provided with la plurality of bevel gears 22, as best seen in Fig.

1. The reference character'23 plate secured to the platform 15 a bolt 24, and said plate 23 has a vertically projecting arm 25. This arm 25 is provided with two right- angular extensions 26 and 27, which lie in a horizontal plane vand mounted for rotation in said right-angular designates a by means of .extensions 26 and 27 is a vertical shaft 28. VSecured tothe vertical shaft 28 in such a manner as to rotate therewith is a bevelgear 29, and said bevel gear 29 is adapted to mesh with the bevel gear 14 heretofore mentioned on the armature shaft of the motor 13. Secured tothe lower end of the vertical shaft 28 is a bevel gear 30, and said bevel gear 30 with the bevel gear on ounted in the transverse braces 11, are shafts 31, said shafts being mounted at each end in roller bearings 32 carried by saidto the platform 15 thereof, is

saidchannels to rotate its respective shaft 31, thus driving its respective cam member 34. By this mechanism it will be apparent that as the motor is operated through the medium of the bevel gear 14 meshing with the bevel gear 29, to drive the vertical shaft 28, the bevel gear 30 will be rotated, and through the `medium of the gear with which it meshes, will drive the shaft 21. Upon rotation of the shaft 2,1, each of the bevel gears 22 acts to drive its Vrespective gear 36, thereby providing for a rotary movement of the several cams 34.

The platform 15 is cut out or channeled as indicated at 40, and lying within each of 40 are the opposed half sections 41 of a ball race, each of said half sections 41 being secured to the under side of the platform 15 by means of bolts, rivets orthe like 42. The'reference character 43 designates the several `polishing elements, andsccured to opposite sides of each of the polishing elements are halves 44 of ball races, which halves are adapted to lie opposite the halves 41 to form complete raceways for the reception of the` antifriction balls 45. By this mechanism, it will be seen that the several polishing elements are suspended beneath the platform 15.

As best shown. in Figs. 5 ande, each of the polishing elements 43 is cut out as indicated by the reference character 50, and closing said cut-out portion is an angle iron "51, one `end of which is right-angularly disposed with respect to the body portion as in dicated at 52. This angle iron is secured inplace by means of bolts or screws 53 over the cut-out portion of each of the polishincr elements. As shown in Fig. 2, a plura ity of wedges 54 are `adapted to pass through the space 'in the cut-out portion() between `the angle iron 5 1 and the polishing element 43, to secure the abrading material `55 in place, said abrading material b'eing shown in the `present instanceas sand paper.

1n order to prevent displacement of the several wedges 54, longitudinal keys 56 are passed through cutout portions 57 in said wedges. t. y

`Each of the polishing` elements 43 `is adapted to be secured to a reciprocating` member 60, said polishing elementslbeing fastened to the reciprocating` element 60 by means of a bolt 61, which passes through an openinfr 62 in the right-angular extension 5 2 of t e plate or angle iron 51. Mounted centrally of the ends of the reciprocating "memberO, is a bolt 62K', and said bolt 62 `forms the means for securing a rotatable fianges,

dog 63 to the reciprocatingl member, said dog 63 lying within the channel 35 of its respective cam member 34, it being understood that there is one reciprocating mehr ber 60 for each of the cam membersv34. These dogs 63 each comprises a dislr 64, which disk is rotatably mounted on antifriction balls or rollers 65.

From the above description it will be apparent that as each ofthe` cams 34 is rotated as heretofore described, the channel 35 thereof will serve to reciprocate its respective dog 63, and Vwill thereby operate its respective member 60. As the member 60 is reciprocated, it will be seen that the abrading surface carried thereby will be reciprocated rapidly over the surface treated, therebyV smoothing said surface. It will further be apparent that owing to the supporting wheels or casters 12, the device is readily movable over the surface to betreated in order that the entire surface may be covered by the machine.

y What is claimed is:

1. A device of the character described comprising a frame, a platform immovably carried by said frame, said platform having its under surface provided with a plurality of channels, guides mounted in each of said channels, an abrading element mounted in rled ,by each of said abrading elements and projecting through an opening in the plat-` form, a plurality of cam wheels adapted" for engagement with each of the verticallyextending membersy whereby the abrading elements are reciprocated upon rotation of the cam wheels, and means for driving said cam wheels in unison, as and for the purpose set forth. f Y

2., 'A device of the character described comprising a frame, a platform carried thereby, reciprocatively mounted in said platform, a plurality of parallel flanges, projecting from the upper face of said platform, a plurality of camwheels mounted between said a shaft for each of said camwheels, a gear carried Vshaft extending 'parallelA to said flanges and provided with a` plurality of gears adapted for single engagement with the gears of the cam wheels, and means for driving said a .plurality of abrading elements by .each of said. shafts, a

lastmentioned shaft to rotate the cam wheels and impart reciprocating"movement to the abradmg elements. y

" MAURICE noaviin Paaren.

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