US1495393A - Floor scraper - Google Patents

Description

May 27 r A. J. BECKETT moon SCRAPER Filed Nov; 28.

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illllllll" llllllllil Patented May 27, 1924.

UNETED STATES oerls 1 FATE ARTHUR J. BECKETT, OF OKLAHOMA CITY, OKLAHOMA.

FLOOR SCRAIE'ER.

Application filed November 28, 1921. Serial No. 518,190.

class is provided with a receptacle to receive and hold the shavings or scrapings resulting from the scraping, and one of the objects of the invention is to improve-the structural arrangement of this receptacle with relation to the vehicle and to the scraping bit. I

Another object is to provide means for ad justing or alining the scraping edge of the bit.

Other objects and advantages of the invention will be set forth in the ensuing description.

Figure 1 of the drawings is a side elevation of the improved machine, with a portion of the pull-bar broken away.

Figure 2 is a reproduction of Figure 1, but with a side plate of the frame of the machine removed and one of the walls of the shaving receptacle broken away.

Figure 3 is a plan 'view.

Figure 4 is a similar view, with the shaving receptacle and a rear spacing block re moved.

Figure 5 is an inverted plan view, but with the scraping bit and certain adjusting screws removed.

Figure 6 is an elevation view on smaller scale, showing the machine in use.

The left-hand end of all the figures is taken as the front of the machine for purposes of this description.

Like characters of reference designate like parts in all the figures.

The frame of the machine includes right and left plates 10 which are bolted to an interposed spacing block 11 at their front ends and to an interposed spacing block 12 at their upwardly-extending rear ends.

The front portion of the front block 11 is provided with a stub 13 to which a forwardlyand upwardly-extending pull-bar 14; is bolted; and in using the machine it is manually drawn along the surface of the floor 15 in the direction of the arrow 16 of Figure 6.

Wheels or rollers 17, which roll on the floor 15, are provided to support the ma chine,.and are mounted on pivot-shafts 18 Whose ends extend through the plates 10; one pair of these rollers being at the rear end of the machine and the other pair toward the front end.

A.v bit-supporting plate 19 is supported by v the side plates 10 near the rear end of the machine and just in front of the rear pair of rollers 17, the ends of this plate having tenons 20 which fit in mortises 21 in said side plates.

The scraping bit 22 is mounted on the front surface of the plate 19 and is clamped to said plateby a clamping-block 23; screws 24 passing through said clamping-block, Ir:

through said bit, and into screwthreaded engagement with said plate to clamp all said parts rigidly together.

As best shown in Figures 2, 4, and 5, the

bit-supporting plate 19 is set a little off of the bit 22 will not coincide along its full scraping edge with joints or planing-mill marks on said boards and fail to scrape a smooth finish.

The bit-supporting plate 19 also has its upper edge inclined forward, as best shown in Figure 2, to hold the bit 22 at a proper scraping angle with respect to the surface of the floor 15.

A number of small set-screws 25 are screwthreaded through the lower edge of the bitsupporting plate 19 to bear forward against the lower edge of the bit 22, and since said bit is inclined forward at its upper edge any local hollow-ground portions of its scraping edge may be brought down to proper scraping plane by action of the set-screw at said portion.

In further arrangement, a rectangular portion of a sheet-metal plate 26 is laid on top of the front ends of the side plates 10 and secured thereto by screws 27.

The rear or remaining portion of this sheet-metal plate 26 curves rearward and downward concentric to the front pair of rollers 17 and extends down to the lower edges of the side plates 10, thence rearward under said plates 10, being secured to their lower edges by screws 28.

The extreme rear end 29 of this plate 26 extends rearward close to the lower or scraping edge of the bit 22, and, although shown of exaggerated thickness, is thin and flexible enough to be adjusted to or drag uponthe floor 15 and yield to any obstructions or.

uneven areas on said floor ahead of said bit.

With the sheet-metal plate 26 arranged in this way it forms an apron onto which the shavings or scrapings from the lower edge of the bit 22 will be thrust, and as a whole this plate forms the bottom of the shaving receptacle to be presently described.

In addition to the plate 26 described, the shaving receptacle 30 includes the front wall 31, rear wall 32, and the two side walls 33; the side walls having angle cleats 34: which are bolted down to the plate 26 to hold the receptacle in place.

/Vhile the front and side walls 31 and 33 of the receptacle 30 rest on the side plates 10 and sheet-metal plate 26, the rear wall 32 is extended down to meet and rest on the upper edge of the bit-supporting plate 19 and against the rear surface of the upper edge of the bit 22.

This arrangement forms a good structural connection between the receptacle 30 and the bit-supporting plate 19 and bit 22, and the screws 2st which hold the bit in place are readily accessible by reaching down into the receptacle.

To keep the surface of the front rollers 17 from becoming coated with resin from the surface of the floor 15, a block of felt 35 or other suitable material is secured to the under side of the plate 26 and thereby held in permanent contact with said rollers; and sai plate is provided with openings 36 so that said block may be saturated with oil or water at intervals.

The rear spacing block 12 is made heavy enough to hold the machine down to the floor against the action of the bit 22 or the upward pull exerted on the pulling-bar 14.

The following is claimed 1. In a machine of the class described, a frame, a bit supporting plate secured thereto, a wood working bit clamped to the bit supporting plate and extending beyond the upper edge, and means secured to and forming therewith a sh'avings receptacle extending to the floor in front of and at each side of the bit, and having a rear wall extending into meeting contact with the extended upper edge of the bit.

2. In a machine of the class described, a frame including side plates, a bit-supporting plate spanning the space between the side plates, a scraping bit clamped to the bitsupporting plate and extending beyond its upper edge, a shavings receptacle carried on the frame, a wall of the receptacle extending down into meeting contact with the upper edge of the bit-supporting plate and lying in contact with the extended upper edge of the bit.

3. In a machine of the class described, a supporting frame, a scraping bit carried by the frame in position for scraping contact with a floor, a shavings receptacle carried by the frame, the receptacle including a bottom of sheet material which extends downward and rearward to a point immediately in front of the scraping bit, the extending portion of said bottom being flexible to adjust itself to the floor and being adapted to have the shavings from the bit thrust onto it.

Witness my hand this 6 day of October,

ARTHUR J. BECKETT.

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