US1434914A - Scraper - Google Patents

Description

n w. RHODES.

SCRAPER. APPLICATION FILED FEB. 24, I922.

Patented Nov. 7, 1922.

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R. W. RHODES.

SCRAPER.

APPLICATION men ms. 24, 1922. 1 134,914, Patented Nov. 7, 1922.

I 3 SHEETSSHEET 2.

W INVEgiOR R. W. RHODES.

SCRAPEH.

APPLICATION FILED m. 24, 1922.

1 ,434,9 1 4. v Patented Nov. 7, 1922.

INVENTOR @Ml/WW Patented Nov. 7,

- mills! l rchso SCRAPEB.

Application filed February 24, 1922. Serial N0. 538,843.

lie it known that I, lionicnr N. ltiroons, a citizen of the United States, residing at Greensburg, in the county of lVestmoreland, State of Pennsylvania; have invented a new "and useful Improvement in Scrapers, of which: the i'i'ollowing is a full, clear, and exact description, reference being bad to, the accompanying drawings, forming part of this specification, in which- Figure l is a side elevation of a scraper mnbodying the present invention;

liigure 2 is a frontelevation of the construction illustrated in Figure 1;

i are 1, is a detail view of the supporther for the blade; l igure 4.- is a sectional View on the line H ll ei Figure 3;

Figures 5 and 6 are detail views of the backing member;

Figure 7 is a perspective view of the clamping strip for the backing member;

Figure .8 is a sectional view, partly in elevation, illustrating the handle in reversed position;

Figure 9 is a side elevation of a slightly modified form of scraper;

lligure 10 is a top plan view of the construction illustrated in Figure 9;

Figure 11 is a perspective view of the foot for the scraper illustrated in Figures S) and 1.0; Figure 12 a detail view of the support- :ll.

lies 9 and 10;

ther nu Figure i6 is a sectional view illustrating a modified form of ad ustin means for the b -1 I. 1 -1 r11 1 7Q r it sciapci one, Mic ni ule is a, cc a1.. view ofone form. oi blade which may be used.

The present invention relates broadly to wood working tools and more particularly to a scraper for smoothing and finishing surfaces such as floors and the like.

At the present time it is quite customary to scrape floors for the purpose of finishii'ig the same. Various forms of scrapers for this purpose have been designed, but practical objections to the use thereof have prsented themselves, With certain types niember for the scraper illustrated in gure 1.3 is a side elevation of a still fur-.

of scrapers it has been necessary to re sharpen the same by curling or turning the ope ating edges of the blade. This has been a delicate operation requiring considerable skill. With still other types of scrapers, the handles have been so mounted as to prevent the use of the scraper adjacent walls. accordingly, it has been necessary to provide separate scraping tools for use therewith. i i

i The present invention obviatesthe objections referred to, and provides a scraper having a blade which may be easily sharpened to provide an actual cutting edge as distinguished from a turned edge, and in which the blade may be easily adjusted to vary the depth of cut. In accordance with one feature of my invention, there is also provided a scraper of the type in which the handle may be reversed relatively to the scraping blade to permit the scraper to be either pulled or pushed as required by the conditions under which the scraper is being operated.

Referringmore particularly to Figures 1 to 8' of the drawings, there is illustrated a scraper comprising a supporting member 2 which is preferably of. curved or segmental shape, as shown. This member is provided with threaded pins 8 projecting therefrom and adapted to pass through openings 3 in a blade d whereby the blade may be maintained in definite position with respect to the supporting member. The blade is preferably of wafer-like thickness to provide flexibility permitting it to be clamped firmly against the surface of the supporting member by means of a curved backing member 5. This backing member is provided with elongated openings 6 adapted to receivethe pins 3 and permit relative adjustment between the supporting member and the backing member. When the desired adjustment is secured, the parts may be clamped in position by tightening the nuts 7 against the flat surface of a clamping strip 8 having openings 9to receive the pins 3 and a curved surface 10 conforming to the curvature of the backing member.

For adjusting the members 2*and 5, the supporting member is provided with racks 11 extending on opposite sidesof'the cut away central portion 12. The backing memher is provided with spaced rojecting bearunscrew the end 17 from the hub 15.

ings 13 adapted to extend partly through the cut-away portion 12 of the supporting member when the parts are in cooperative posi tion, as clearly shown in Figure 1. Extending through the openings 1% in the bearings 13 is a hub 15 having formed on the outer ends thereof pinions 16, the teeth of which are adapted to mesh with the racks 11. EX- tending diametrically through the hub 15 is a threaded opening adapted to receive the threaded end 1'? of the handle bar 18. Mounted. on the handle bar adjacent the bearings 18 is a handle 19 having asleevelike collar 20 through which the handle bar 18 loosely passes. One end of the collar 20 is concaved as indicated at 21 to cooperate with the circular faces of the bearings 13. Secured to the outer end of the handle bar is a second handle 22.

With the construction described, when it is desired to effect relative adjustment between the members 2 and 1 to retract or project the blade 4, the handle 22 is rotated to This releases the clamping action between the collar 21 and the bearings 13, and permits the pinions 16 to be rotated by relative movement bet-ween the handle bar 18 and the supporting member 2. Rotation of the pinions 16 in a clockwise direction as viewed in Figure 1, such as would be produced if the handle 22 is swung upwardly in the direction of the arrow A, is effective for retracting the blade 4, while rotation of the pinions 16 in a counterclockwise direction as viewed in Figure 1, by movement of the handle 22 in the opposite direction, projects the blade 4:. When the desired positioning of the blade issecured the clampingnuts 7, which were loosened to permit this adjustment, will again be tightened, and the handle 22 will be rotated to screw the threaded end 17 into the hub 15 and thereby hold the parts against movement. It will also be apparent that any desired angular relationship between the blade 4; and the handle bar 18 may be effected by changing the relationship of the teeth of the pinions 1G with respect to the racks 11:

When it is desired to sharpen the blade i, it is only necessary to loosen the nuts 7, loosen the handle bar 18 and move the bandle bar in the direction. of-the arrow B to project the blade for its full distance. The blade may then be sharpened on a stone in the usual manner.

In Figure 8 of the drawings the handle bar 18 is illustrated as having been entirely released from the hub 15 and again screwed thereinto from the opposite side of the hub. This permits the scraper to be pushed if desired, while with the parts in the position illustrated more particularly in Figure 1, the scraperis adapted to be pulled.

The backing member 5 gives support" t the flexible blade a adjacent its cutting edge and also serves as a stop, cooperating with the amount of projection of the blade and the angular position of the handle bar 18 for controlling the depth of the cut.

In Figures 9 to 12 of the drawings there is illustrated a slightly different embodiment of the present invention, and for the sake of brevity, I have indicated the parts of these figures which correspond to parts already described by the same reference characters with a prime aflixed thereto. With this construction the handle bar is omitted and the parts are clamped in position by a clamp screw 23 having a thumb nut The clamping screw 23 has a clamping washer'25 of elongated shape similar in construction to the clamping strip 8 heretofore described, and adapted to bear against the periphery of the bearings 13'.

lVith this form of my inventionthe supporting member 2, in addition to the pins 3', has projecting rearwardly therefrom pins 26 adapted to pass through slots 27 in a curved member 28 having a foot 29 formed thereon. The member 28 may be clamped in the desired position by nuts30. Secured to the member 28 is a cross bar 81 having its opposite ends 'angularly bent as illustrated in Figure 10 to receive handles 32 by which the scraper may be either pulled or pushed. I have found that with a construction of this character the foot 29 effectively cooperates with the blade to prevent chattering thereof.

' In Figures 13 to 15, there is illustrated another modification having the parts thereof corresponding to the parts already described in detail in connection with Figures 1 to 8 indicated by the same reference characters with an a aiiixed thereto. In this form of my invention the handle bar is adapted to pass through a tubular sleeve 33 having a tubular projection 34; threaded in its interior and adapted to receive the foot 35. Itwill be apparent that the foot 35' corresponds generally in function to the foot 29 heretofore described.

In Figure 16 I have illustrated a slightly modified construction adapted particularly to the forms of the invention illustrated in Figures 1 to S and Figures 13 to 15, for changing the position of the blade without changing the angular relationship of the blade with respect to the surface being scraped. my invention the hub 15 has projecting from one side thereof a hollow interiorly threaded boss 36 adapted to receive the threaded end 17 of the handle bar. The pinions 16 are adapted to be formed on the opposite ends of a rod 37 rotatably mounted within the hub 15 which in this case is of sleeve-like formation. The rod 37 is tapped to receive an operating pin 88 and the hub 15 has a slot 39 to permit the rod 37 and In accordance with this feature of i the pinions to be rotated relatively to the hub without changing the angular position of the handle. p v

The edges of the backing members 5, 5 and 5 are all preferably constructed with beveled edges'39 permitting the scraper to more closely scrape adjacent corners and the like. i j

The advantages of the present invention arisefrom the provision oi a scraper adapted to employ a flexible scraping blade which may be easily sharpened or adjusted as found necessary. Further advantages arise from. the construction permitting the scraper to be either pulled or pushed whereby an entire job may be finished by the use of a single implement.

I claim:

1. In a scraper, a supporting member, a'

backing member, a flexible blade, adapted to be held in -fixed position with respect to one of said members, means for clamping said blade in position between said members, said members being operative to curve the blade by the clamping Operation, means for adjusting one of said members relatively to the other to vary the amount of projection of said blade therebeyond, and a handle for operating said scraper, substantially as described.

2. In a scraper, a supporting member, a backing member, a flexible blade, adapted to be held in fixed position with respect toone of said members, means for clamping said blade in position between said members, said members being operative to curve the blade by the clamping operation, means for adjusting one of said members relatively to the other to vary the amount of projection of said blade therebeyond, a handle for operating said scraper and a foot cooperating with said blade, substantially as described.

In a scraper, a supporting member, a backing member, a scraping blade of waferlike thickness adapted to be held in fixed position with respect to one of said members, means for clamping said blade in position between said members, said members being operative to curve the blade by the clamping operation, means for adjusting one of said members relatively to the other to vary the amount of projection of said blade, and means for operating said scraper, substantially as described.

4. In a scraper, a supportin member having a pin projecting therefrom, a backin member having an elongated opening to receive said pin. a blade adapted to be held by said pin in fixed relation to said supporting member, means for clamping said blade in position between said members, and an operating handle for effecting relative adjustment between said members to vary the amount of projection of said blade, substantially as described.

5. In a scraper, a supporting member having a pin projecting therefrom, a backing member having an elongated opening to receive'said pin, a blade adapted to be held by said pin in fixed relation to said supporting member, means for clamping said blade in position between said members, an operating handle for effecting relative adjustment between said members to vary the amount of projection of said blade, and a foot cooperating with said blade, substantially as described. I 1

6. In a scraper, a supportingmember hav ing a rack formed thereon, a backing member adapted to cooperate therewith and having a bearing projecting therefrom, a pinion in said bearing adapted, to mesh with said rack, a blade, means for clamping said blade in position between said members, and means for adjusting said pinion to vary the amount of projection of said blade, substantially as described.

.7. In a wood-working tool, a scraping blade of wafter-like thickness, and means for curving the blade and for supporting the scraping edge of said blade, substantially as described.

8. In a woodeworking tool, a flexible blade of wafer-like thickness, supporting members vtor curving said blade, and means for producing relative adjustment between said members to vary the amount of projection of said blade, substantially as described.

9. In a wood-working tool, a scraping blade of wafer-like thickness, means for curving the blade and for supporting the cutting edge of said blade, and means cooperating with. said blade to maintain the same in definite angular relation to the surface being scraped, substantially as described.

10. In a wood-working tool, a flexible scraping blade, supporting members adaptedto receive and clamp said blade therebetween under tension, means for varying the amount of projection of said blade, and means cooperating with said blade to maintain the same in definite angular relation with respect to the surface being scraped, substantially as'described. I

11. In a scraper, a supporting member, a backing member, a flexible blade, adapted to be held in fixed position with respect to one of said members means for clamping said blade in position between said members, and an operating handle eflective for ad justing one of said members relatively to the other to vary the amount of projection. of said blade therebeyond, said backing member having beveled edges, substantially as described.

12." In a scraper, a supporting member, a backing member, a flexible scraping blade adapted to be held in fixed position with. respect to one of said members, means for elamping said blade in position between said members, said members being operative to curve the blade by the clamping operation, and an operating handle operatively conneoted with said members for varying the amount of projection of said blade by adjusting one of said members relatively to the other, substantially as described.

13. In a scraper, a supporting member having a rack formed thereon, a backing member adapted to cooperate therewith and having a bearing projecting therefrom, a pinion in said bearing adapted to mesh with said rack, a blade, means for clamping said blade in position between said members, and an operating handle for operating said scraper and adjusting said pinion to vary the amount of projection of said blade, substantially as described.

14. In a wood-working tool, a flexible scraping blade of wafer-like thickness, supporting members for curving said blade for projecting its cutting edge toward the. work to be scraped, and an operating handlefor producing relative adjustment between said members to vary the amount of projection of said blade, substantially as described.

15. In a wood-working tool, a supporting member, a backing member, a flexible blade adapted to be held in fixed position with respect to one of said members, and means for clamping said blade to hold the same under tension between said members to project the cutting edge in the direction in which the scraper is operative, substantially as described. a

16. In a wood-working tool, a supporting member,- a backing member, a flexible blade adapted to be held in fixed position with respect to one of said members, means for clamping said blade to hold the same under tension between said members to project the cutting edge in the direction in which the scraper is operative, and means for varying the amount of projection of said blade beyond said members, substantially as described.

In testimony whereof I have hereunto set my hand.

ROBERT 'IVORLEY RHODES.

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