US1011490A - Painter's and decorator's scraper. - Google Patents

Description

G. RASMESBN, J1. PM NTBRS AND DBGOBATOR'S SORAPBR.

- wmommn'rnm JUNE 19.1911.

Patented Dec. 12, 1911 G. RASMEYSBN, JR. l PAINTBRS AND DBGORATORS SGRAPER.

APPLICATION FILED JUNE 1s, 1911.

Patentednee. 12, I1911 2 SHEETS-SHEET z.

UNITED srarns PATENT' OFFICE.;

GEORGE RASMESEN, JR., OF WINNETK, ILLINOIS.

PAINTERS AND DECORATORS SCRAPER.

Speccation of Letters Patent.

To all whom it may concern: 4

Be it known that l, GEORGE RAsMEsnN, Jr., a citizen of the United States of America, and a resident ot' VVinnetka, county` o1' Cook, State ot' Illinois, have invented certain new and useful Improvements in Painters and Decorators Scrapers, of which the following in a specification.

The main objects ot this invention' are. to provide an improved form of painters and decorators` scraper particularly adapted for r removing from walls, floors and other surfaces, the various kinds of coatings which are usually applied for the purpose ot ornanienting them, such, for example, as paint, varnishes, and the like; to provide a construction of this kind which may be easily manipulated `for guiding a power driven rotary tool; to provide improved means tor adjusting the tool toward and away from the surface so as to regulate the depth of cut; to provide simple means for readilyremoving the rotary tool from the operating 'handle and casing to permit various forms of tools to he substituted, one for the other, for different purposes; and to provide a -construction of this kind in which the adjustment may be made by the operation of a single part, and in which the structure is such that the device can be examined, taken apart and reassembled by unskilled labor.

Arspecitic embodiment of this invention is illustrated in the accompanying drawings, in which Figure 1 is a perspective view of a paint*- ers anddecorators' scraper constructed according to this invention and containing a rotary tool or -operating head varranged to be driven by an electric motor through a flexible shaft. `Fig. 2 is a perspective view showing the construclen of one of thev operating tools, and the crosshead in which itis carried, the'parts beingseparated slightly to more clearly illustrate their construction. Fig.- 3 is a longitudinal section of the scraper with tl. parts in their assembled relation,

and illustrating the manner in which the advpaint,-or for smoothing a surface prior to applying a coating ot paint. Fig. (5' a detail I shovvmg'a orin of operating tool which 1s particularly desirable. for use in beading or the like, and having ridges and hollows into which the operating tool must reach.

ln the construction shown in the drawings, the main frame of the device is a boxlike casing 1 which is open at its Vlower face' and which is provided with an operating handle 2, having an adjustablejfball and socket joint 3 so that it 'may beset at any angle with respect to the casing 1. Mounted within the casing and slidable toward and away' from the open face thereof is a crosshead comprising a pair of bearinglugs 4, having therein a pair of alined journal bearings, having rigidly secured thereto the arms 5 and 6 respectively. -These arms t one against the other and have their adjacent faces provided with an intertting tongue and groove joint 7, which insures accurate alinement of the journal bearings in the blocks 4, although permitting said hlocksto be readily separated to remove or interchange the operating tools. The arm G has a central aperture extending through it in the same plane with and at right angles to the journal bearings in the blocks a and the arm has a registering aperture, which is threaded. The arms 5 and 6 are securely lockedtogether bymeans of a stud 8 which has a threaded end fitting the threaded aperture 10 in the arm 5, vand extending through the aperture 9 in the yarm (3.` A hexagonal shoulder 12 on the stud bears against the upper surface of the arm G and cooperates with the threaded end of said stud for locking these two arms rigidly together.

The bearing blocks 4 are each grooved at 13 at opposite sides, and the casing 1 is pron vided with guide slots 15 which extend at right angles to the open face of the casing 1 and are of such width that their edges it within the grooves 13 in blocks 1. 4The parts of the crosshead are, of course, so constructed that the journal bearing 1G will be in accurate axial alineinent with each other when the crosshead is assembled.

The stud 11 has an upwardly `extending threaded shank, and there is provided a rather` long sleeve 17 which is interiorly threaded to the shank 11.

The upper part of the casing is provided with an upwardly extending tubular boss 18, fitting the outer cylindrical bearing surface of the sleeve 17 and counterbored at its' inner Patented Dec. 12, 1911.

Application led .Tune 19, 1911. Serial No. 634,196. l

end to receive a head or shoulder 19 on the y A lower end of the sleeve 17, which shoulder prevents the sleeve 17 from shifting upwardly in its bearing. The lower end of `the sleeve 1T is also counterbored at 2O to provide a recess Within which the hexagonal shoulder 12 of the stud may enter, thusy allowing maximum vertical adjust-ment of the crosshead within the casing.

It is to be noted that the ualls of the casing are located as closely as possible to the operating tool and crosshead, and that the arrangement of the parts just described permit-s the top of the casing to be comparatively low. ln such a tool, compactness is of the utmost importance, as it is necessary frequently to get intocontined places, and it is desirable to avoid as much as possible scraping by hand, in connection with the use of power operated tools of this kind.

The outer part of the boss 18 has a peripheral bearing surface, upon which is mounted a knurled head 21. The upper end of the head 21 extends inward over the top of the boss 18 and fits the adjacent part 22 of the sleeve 17, the joint being such that the head Q1 may be readily slid into and out of engagement with the sleeve, but providing suitable flat surfaces or shoulders to prevent relative (rotation. The upper extremity of the sleeve 17 is exteriorly threaded at Q3 to receive a nut or head Q11. This provided with flattened surfaces for receiving a wrench, and is also provided with a knurled surface 25 so that it may be turned by hand.

Operating tools of different character are required for removing different kinds of coatings. Three different forms of such tools are shown in the drawings. In Figs. 2, 3 and 4. the tool is represented in the form of a sanding roller and comprises a shaft 26, a rubber roller Q7 mounted thereon and having its outer surface covered With emery cloth orsandpaper Q8. The ends of the sheet of emery clot-h or sandpaper are secured b v a bar 29 which tits within a longitudinal groove in the rubber body of the roller and is fastened at its ends by clamps 30, which are rotatable on the shaft and provided with hook-shaped arms adapted to engage the hook-shaped ends 31 of the bars Q9. These parts are held into intertittiug engagement with each other by the pressure of the resili ent rubber body of the roller. The parts 30 are secured against endwise shifting on the shaft by means of shoulders 3Q. In the form shown, these shoulders are elliptical in form, and the apertures in the clamps 30 are also of elliptical form, so that when the clamps are turned to certain positions, they may be slid over the shoulders 32.

In the form shown in Fig. 5, the shaft 2G has a rectangular head mounted thereon, and lthis head is provided with T-slots 33 for receiving the heads of bolts which secure cutter blades 311 against the faces of the head. This form of cutter head is particularly desirable for removing thick coatings of paint, paper and the like.

In the form shown in Fig. 6, the operating tool is a steel Wire brush 37 trimmed to cylindrical form. In this case, the shaft of the brush is made up of twistedwires 38, and these are secured together at their ends Within bushings 39 and 40 which serve as journals to tit the bearings and provide accurately alined journals. This head is particularly useful for surfaces having irregularities which could not be effectively treated by tools like those shown in Figs. 2 and 5.

The operation of the device shown is as follows After selecting the type of tool which he desires to use, the operator places the journals of the tool in the bearing blocks 4 and slides the arms and 6 of those bearing blocks together into their interitting position, as shown in Fig. G, and then inserts the stud 11 into the apertures E) and 10. This locks thearms 5 and G together and secures thejournal bearings in axial alinement. The operator then inserts the crosshead into the casing so that the guide grooves 13' of the bearing blocks fit the edges of the guide grooves 15 in the casing and so that the shank 12 on which the sleeve 1T has been previously mounted will enter the aperture in the boss 18. The adjusting sleeve or head i1 is now slipped into place over the outside .of the boss 18 and with its flat surface fitting the fiat surface 22 on the sleeve 17, Then the lock nut 24 is screwed home on the outer end of the sleeve, pulling the shoulder 19 into close engagement With the bottom of the counterbore and preventing all axial shifting of the sleeve 17, although permitting it to be freely rotated with the head 21. Thus, the rotation of the head 21 rotates the sleeve 17, and as the sleeve cannot move up or down, it will` due to its threaded relation With the shank 11, cause said shank to be shifted up or down` according to the direction of rotation of the head 21. It will be seen from the drawings that it is a comparatively simple matter to remove one tool and substitute another.

The construction of the device, in addition to affording an interchange of tools, also permits a tool to be quickly reversed so that the driving shaft may be attached at either end of the casing. This has the same effect. as attachingthe handle at either side of the casing, and'renders the device adaptable to a great range of conditions and also suits the device to the preference of the operator as to righthand or lefthand manipu lation. n

Although but one specific embodiment of this invention is herein shown and described, it will be seen that numerous details of the construction shown may be altered or omitted WithoutJ departing from the spirit of iso this invention, as defined by the following claims.

I claim: f A

1. A painters scraper, comprising acasing having an operatingvhandle connected thereto and having an open face, a crosshead ladjustably mounted in said casing, guides for said crosshead, said crosshead comprising 'a pair of bearing blocks-having ahned journal bearings adapted to receive a shaft and support the same in said crosshead, each i y said stud for adjusting said crosshead.

guide.' slots, and

ward said open face, a pair of bearing 2. In a scraper of the class. described, the combination of a casing having an open face and having an operating handle, guide slots on opposite sides of said casing and open toblocks respectively mounted to slide along said each having rigidly secured thereto an' arm, said arms being adapted to overlap each other in interfitting engagementone above the other, a stud extending loosely through the upper said arm and hav.- iig threaded engagement with the lower said arm, and having a shoulder bearing on j said upper arm and ada ted to clamp said arms for securing them in such intertting engagement, said stud having a threaded shank extending upwardly froml saidari'n" and through the casing, a-sleeve haiving threaded engagement with said shank .and being journaled to rotate in said casing,

means securlng said sleeve against axial movement'in sald casing, a head rotatably mounted on saidcasing and having splined relation with said sleeve, and a nut carried on the outer end of said sleeve.

' 3. Ina scraper, the combination of a casingopen at the bottom and having an aperture 1n thetop, a tubular extension on said easing extending upwardly from and concentric with sai'd aperture, a crosshead carrying a rotary head or tool and havin rigidly secured thereto a threaded shan extending u y sleeve fittmg rotatably within said tubular extension and having threaded engagement ders thereon adapted to. prevent up and down movement of said sleeve, and means at the top of said sleeve for rotating it to raise and lower said shank for adjusting said crosshead i 4. In a scraper, thev combination ofv a casing openatthe bottom and having an aperture in the top, a tubular extension on said casing extending upwardly centric with said aperture, a cros'shead carrying a rotary head or toolv and having rigidly s'ecured thereto a threaded shank ex'- tending u wardly through said aperture, a 'sleeve iittlng rotatably within said tubular extension and having threaded engagement with-said shank, said sleeve having shoulders .thereon adapted to prevent up and down movement of said sleeve, a cup-'shaped head j ournaled on the outside of said extension and having a part extending into engaglement with said sleeve for .rotating it, an anut carried on saidsleeve and coacting with said cup for preventing up andr down play, of said sleeve. y

5. A painters scraper, ing having an operating thereto and having an open comprising a cas'- handle connected for saidcrosshead, said crosshead comprismg a pair of bearing blocks having alind .and su port the same in said cross head,

thereto an arm extending lengthwise of said GEORGE Witnesses: 'f

. M Ax K. MEYER,

GEORGE Hoon.

nAsMEsEN, JR.

wardly through said aperture, aA

with said shank, said sleeve having shoul-4 from and conadjustably mounted in said casing, guides` .rjournal bearings adapted to receive'a shaft each o said blocks having rigidly secured` face, a crosshead Y shaft, said arms being adapted to interfit signed at Chicago this-16 any Aof, June y

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