US2523884A - Wall sander - Google Patents

Description

P 6, 1950 H. R. SWENSON 2,523,884

WALL SANDER Filed July 24, 1946 Patented Sept. 26, 1950 UNITED STATES PATENT OFFICE 4 Claims.

This invention relates to a combination wall scraper and sander, especially designed to facilitate removal of wall paper from walls and to make it easier to smoothen whatever rough spots there may be by sanding the same.

The principal object of my invention is to provide a hand tool of the kind mentioned consisting of a blade carrying a head on the end of a handle of suitable length, the head being so designed in relation to the spring Wire frame or yoke of a sander attachment that the sander may be quickly and easily assembled on the head without disturbing the blade, and, after use, may be as easily and quickly removed, thus giving the decorator a two-in-one tool which is handy to 'use and handy to store away in his kit to carry from job to job. The handle length may be quickly and easily increased by the application of an extension handle so that in most cases all of the work can be done from the floor and the step ladder or scaffold will not be needed under average working conditions. The sander attachment is designed for quick and easy application to the head, so that there is no necessity for removing the scraping blade, and so that an area on the wall or ceiling from which paper has been scraped can be easily sanded smooth, using the same length handle, the sander block being pivoted on the attachment on a horizontal axis in such close proximity to the working edge of the blade that'it can be operated with the same handle length without any awkwardness.

The invention is illustrated in the accompanying drawings, in which Fig. 1 is a front view of the combination tool of my invention showing the sander attachment to the scraper and ready for use, and

, Fig. 2 is a side view of Fig. 1. a

The same reference numerals are applied to corresponding parts in these two views.

The reference numeral 3 designates the head which is herein shown as made of wood or plastic material and tapered rearwardly to provide a substantially cylindrical shank portion 4 which may have an elongated handle of the same diameter integral therewith or suitably secured thereto. When the handle is an integral extension of the shank 4 provision may be made for the attachment to the outer end thereof of an eX- tension handle, and where the handle is attached to the shank 4, handles of different lengths may be provided for attachment thereto so that the decorator may reach a good portion of the wall from the floor with one handle length and do the rest of the job with a longer handle length.

While a one-piece head 3 of wood or plastic construction is shown, it should be understood that I may provide a head of two-piece stamped sheet metal construction divided in the plane ab in Fig. 2, which includes the axis of the handle and shank portion 4, the shank portions of the stampings being semi-circular in cross-section and the outer end portions being of channel-shaped crosssection, the flanges defining the side edge portions of the stampings having abutment in the plane wb into stampings being riveted or otherwise suitably secured together. By suitable ribbing, the stampings may be given the desired stiff ness even though sheet metal of light gauge is used. The head 3 is slotted at its outer end in the plane a-b as indicated at 5, to accommodate the butt portion 6 of the steel scraping blade I. Ferrules 8 are set in recesses 9 in the head 3 and have tubular shank portions Ill which extend through elongated parallel slot l I provided in the butt portion 6 of the blade whereby to permit in and out adjustment of the blad 1 before the screws 12 that are threaded into the shanks I 0 of the ferrules 8 from the other side 3 are tightened. A sharp beveled edge i3 is provided on the outer end of the blade 1 preferably on the skiving angle illustrated in Fig. 1, because I have found that this gives a much better scraping action and enables doing the work a lot faster than where the cutting edge is at right angles to the longitudinal axis of the head 3 and handle and shank It will now be observed that the blade l is slightly narrower than the head 3 and that the head has longitudinally extending grooves Hi in the edge portions l5 that project laterally beyond the lateral edges of the blade I. These grooves accommodate the arms 16 and H of a U-shaped spring wire frame or yoke l8 that is provided for support of the sander, indicated at I9. The arms [6 and I! have inwardly bent end portions 20 and 2| that are adapted to be entered in holes 22 and 23 provided in the head 3 at the inner ends of the grooves I l. The end 20 is somewhat longer than the end 2! and will be entered in the hole 22 first so that it will not require as much spreading of the arms It and I! to enter the end 2! in the hole 23. As soon as the end 2! is brought into alignment with the hole 23, the arm ll snaps into place in the groove l4 and the frame i8 is thereafter rigid with the head 3 and is fastened tightly enough and securely enough to eliminate any likelihood of its coming oif. If the frame or yoke I8 fits too loosely in the grooves 54, the screws l2 can be tightened so as to contract the slotted portion 5 of the head 3 enough to take up the play in the grooves l4 and thus make the frame reasonably rigid. The screws I2 and ferrules 8 being in close proximity to the grooves I4, as shown in Fig. l, are located to best advantage from that standpoint. Of course, if the tool has been in use for a long time and the grooves I4 have become worn, the workman may find it advisable to remove the scraper blade 1 in order to clamp the frame l8 securely. A small loop 24 is formed in the inner end portion of the arm I! into which a nail or screw driver bit or putty knife blade may be entered to pry the end 2| loose when it is desired to remove the sander attachment. The cross-portion 25 of the fram or yoke I8 is disposed in closely spaced relation to the knife edge l3 so that there is no likelihood of this sharpened edge being damaged in the operation of the sander, and yet the workman can use the sander at the same handle length as the scraping blade in working on a certain area on the wall or ceiling, without any awkwardness.

The sander l9 may be of any suitable or preferred construction and is herein disclosed as consisting of a rectangular block 26 having a transverse groove 21 in the middle of the bottom into which a bearing plate 28 is fitted having a channel in the middle thereof to receive the cross-portion 25 of the frame [8, another plate 29 being provided to confine the wire 25 in the groove in the plate 28 and the two plates being fastened, as by means of screws 30 to the block 26. Any suitable number of sheets of sand paper 3! can be applied to the block 26 covering the outer face 32 and folded inwardly against the back of the block where retainer plates 33 that are fastened by swing nuts 34 threaded on screw 35 that project from the back of the block 26 serve to clamp the ends of the sheets of sand paper securely enough so that when one sheet becomes worn smooth, it can be torn off to expose the next sheet therebeneath, without the necessity of bothering to loosen and retighten the clamping plates 33. Obviously, the fact that the block 26 is free to oscillate with respect to the cross-portion 25 of the frame I8 enables sanding the wall or ceiling from any angle. The decorator can apply the desired pressure to the block 26 by bearing against the handle, and I have found that the slight roughnesses encountered in this kind of work can be quickly and. easily smoothed off with this attachment and a lot of time and expense is saved in doing the work this way.

It is believed the foregoing description conveys a good understanding of the objects and advantages of my invention. The appended claims have been drawn to cover all legitimat modifications and adaptations.

I claim:

1. In a wall sanding device, the combination of a rectangular block having a transverse bearing means on the back of the block, a sheet of abrasive material fastened on the face of said block, a generally U-shaped yoke having its crossportion mounted in said bearing means and having the substantially parallel side arms of the yoke extending away from the block, said side arms being elongated and having a short portion of the free ends thereof bent inwardly, a handle member having a portion approximately as wide as said yoke, said handle portion having a longitudinally split portion transversely thereof and side grooves and apertures for receiving the free end portions of the side arms of the yoke and the inwardly bent end portions thereof, and means for drawing the split portions of the handle together to clamp said yoke in said handle.

2. In a wall sanding device, the combination of a rectangular block having a transverse bearing means on the back of the block, a sheet of abrasive material fastened on the face of said block, a generally U-shaped yoke having its crossportion mounted in said bearing means and having the substantially parallel side arms of the yoke extending away from the block, said side arms being elongated and having a short portion of the free ends thereof bent inwardly, a handle member having a portion approximately as wide as said yoke, said handle portion having a longitudinally split portion transversely thereof and side grooves and apertures for receiving the free end portions of the side arms of the yoke and the inwardly bent end portions thereof, and means for drawing the split portions of the handle together to clamp said yoke in said handle, said means comprising screws and screw threaded elements in which the screws are threaded extending through the split portion of the handle in closely spaced relation to the grooved sides thereof.

3. In a wall sanding device, the combination of a rectangular block having a transverse bearing means on the back of the block, a sheet of abrasive material fastened on the face of said block, a generally U-shaped yoke having its crossportion mounted in said bearing means and having the substantially parallel side arms of the yoke extending away from the block, said side arms being elongated and having a short portion of the free ends thereof bent inwardly, a handle member having a portion approximately as wide as said yoke, said handle portion having a longitudinally split portion transversely thereof and side grooves and apertures for receiving th free end portions of the side arms of the yoke and the inwardly bent end portions thereof, and means for drawing the split portions of the handle together to clamp said yoke in said handle, at least one of the side arms of said U-shaped yoke having an outwardly bent loop portion near the inwardly bent end portion adapted for entry of a prying tool to permit flexing said arm away from the handle to disengage it.

4. In a hand operable tool of the character described, comprising an elongated handle having a generally rectangular head on the outer end, said head having a longitudinally split portion transversely of the outer end thereof adapted to be compressed to clamp the butt portion of a scraping blade therein, a scraping blade having the butt portion entered in the split portion of said head, and means for drawing the split portions of said head together to clamp the butt portion of said blade removably and adjustably, the improvement which consists in the provision in the opposite sides of said head of grooves in coplanar relationship to and opening into the split portion of the head so as to be varied in width when the means for drawing the split portions of said head together is operated, a generally U-shaped yoke having substantially parallel elongated side arms entered in said grooves, each of the side arms having a short portion of the free ends thereof bent inwardly, and said head having apertures provided therein at the inner ends of the grooves behind the split portion of the head arranged to receive these inwardly bent portions to retain the yoke against outward displacement from the head, and a block 5 oscillatably mounted on the cross-portion of said Number yoke and adapted to carry means for rubbing a 619,941 flat surface to be worked. 701,503 HJALMER R. SWENSON. 846,665 5 1,484,166 REFERENCES CITED 2 400 929 The following references are of record in the 2,434,581 file of this patent:

UNITED STATES PATENTS 10 Number Number Name Date 25,613 485,923 Gage Nov. 8, 1892 582,329 579,966 Dunn Apr. 6, 1897 Name Date Cochrun Feb. 21, 1899 Plummer June 3, 1902 Hames Mar. 12, 1907 Walk Feb. 19, 1924 Hein May 28, 1946 Ottoson Jan. 13, 1948 FOREIGN PATENTS Country Date Netherlands Apr. 2, 1930 Germany July 16, 1931

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