US1949499A - Washboard - Google Patents

Description

- March 6, 1934.

c. G. STRANDLUND. JR. El AL WASHBOA'RD Filed April 9, 1931 2' Sheets-Sheet 1 March 1934. c. a. STRANDLUND, JR, ET AL 1,949,499

WASHBOARD Filed April 9, 1931 2 Sheets $heet 2 @Ue'm Patented Mar. 6, 1934 UNITED STATES WASHBOARD Carl G. Strandlund, Jr., and Anna Griffith, Minneapolis, Minn; said Strandlund assignor Application April 9, 1931, Serial No. 528,763

1 Claim.

This invention relates to wash boards and is in the nature of an improvement on or modification of the wash board disclosed and broadly claimed in Letters Patent of the United States No. 1,385,442, issued to William P. Griflith and Anna Griflith of date July 26, 1921. The present wash board, in common with the wash board of the earlier patent, has alternate brush bristles and rigid rubbing strips extended longitudinally of the board.

The improved board is illustrated in the accompanying drawings wherein like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a perspective showing the complete or finished wash board;

Fig. 2 is a perspective showing the board with the rigid rubbing surfaces afforded by the metallic channels removed therefrom;

Fig. 3 is a fragmentary section taken on the line 33 of Fig. 2;

Fig. 4 is a longitudinal section taken on the line 44 of Fig. 1, some parts being broken away;

Fig. 5 is a longitudinal section taken approximately on the line 5-5 of Fig. 1;

Fig. 6 is a transverse section taken on the line 6-6 of Fig. 1; and

Fig. 7 is a transverse section taken on the line 7-7 of Fig. 1. v

The frame of the wash board is made up of wooden side bars 8, upper and lower tiebars 9 and 10, and the top or cap bar 11. The ends of the tiebars 9 and 10 are mortised into the side bars 8 and secured thereto by nails or any other suitable means. The cap bar 11 is shown as connected to the upper ends of the side bars 8 by dove-tail joints 12. This construction is such that the side bars can be applied to the bars 9, 10 and 11 by lateral movement and pressure. The rows of brush bristles 13 are secured to brush backs 14 that are in the form of wooden strips, the ends of which are mortised into the tiebars 9 and 10 as best shown in Fig. 5, so that the said brushes cannot move laterally in respect to each other nor in respect to the side bars 8. The ends of these brush backs 14 should be inserted into the bars 9 and 10 before the latter are applied to the side bars 8 and when the said side bars are applied and secured to the bars 9, 10, and 11, the brush backs become rigid immovable parts of the wash board structure.

The rubbing surfaces between the brushes are afforded by sheet metal channels 15, the exposed surfaces of which are corrugated and the depending side flanges of which are preferably turned slightly outward at an angle at 16, see particularly Fig. 6, and are pressedinto correspondingly formed grooves 1'7 formed in the inner faces of the side bars 8 and in the exposed sides of the brush backs 1'7. Preferably, also the end portions of the rubbing channels 15 are obliquely extended at 18, see Fig. 4, and are pressed into correspondingly formed grooves 19 formed in the faces of the tiebars 9 and 10. The corrugated rubbing channels 15 may thus be very quickly applied to the wash board and although they may be removed by upward pressure, they will not be displaced by downward pressure such as produced in the use of the wash board, but will be forced more tightly into the holding channels of the tiebars, side bars and brush backs. The numeral 20 indicates a board applied between the bars 9 and 11 and the upper portions of the side bars 8 to afford a soap tray.

It will be noted that the exposed brush surfaces are slightly above the corrugated unyielding rubbing surfaces so that the combined action of the brushes and the corrugated surfaces produce the most efficient kind of scrubbing action. Moreover, for removing spots, the goods can be properly directed principally against the brush surfaces. Inasmuch as the brush surfaces are extended 1ongitudinally of the wash board or in the direction of the rubbing action, splattering will not be produced by the brushes. The wash board has no pockets formed therein for the accumulation of dirt or soap condensed from the suds and hence may be kept in very clean condition. Also the board is of a light but strong construction and may be produced at very reasonably low cost. It is also important to note that the several corrugated metallic rubbing channels 15 are all alike so that they may be produced by a single die.

From the foregoing, it is evident that the board described is cap-able of modification within the scope of the invention herein disclosed and claimed.

What is claimed is:

A wash board comprising wooden side bars and top and bottom tie-bars, in combination with spaced brushes having wooden back bars extending parallel to said side bars and rigidly secured to said top and bottom tie-bars and thereby held against shifting movements transverse to said back bars, said side bars, top and bottom tie-bars and the brush back bars having grooves extending lengthwise of said bars, and hollow inverted metallic channel strips in the spaces formed between said brushes and between said brushes and side bars, said channel strips having flanges pressed into the grooves of said side bars, top and bottom tie-bars, and brush back bars, said structure permitting said metallic channels to be inserted into working position after said grooved members have been permanently assembled.

CARL G. STRANDLUN'D, JR. ANNA GRIFFITH.

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