US2589746A - Sanitary hairbrush with removable head - Google Patents

Description

March 18, 1952 M. H. sToRcH 2,589,746

SANITARY HAIRBRUSH WITH REMOVABLE HEAD Filed Oct. 15, 1949 3 Sheets-Sheet 1 MAX H.-STO H INVENTO BMW ATTORNEY March 18; '1952 M. H. STORCH 2,589,745

SANITARY HAIRBRUSH WITH REMOVABLE HEAD Filed Oct. 15, 1949 s Sheets-Sheet z MAX H. STORCH l3 INVENTOR BYMM ATTORNEY March 18, 1952 M, T R H 2,589,746

SANITARY HAIRBRUSH WITH REMOVABLE HEAD Filed Oct. 13, 1949 3 Sheets-Sheet 3 J A MAXI-N ATTORNEY 81' CH NT Patented Mar. 18, 1952 UNITED STATES PATENT OFFICE" SANITARY HAIRBRUSH WITH REMOVABLE HEAD Ma'x H. Storch, Belle Harbor, N. Y.

Application October 13, 1949, Serial No. 121,159

Claims. 1

This invention relates to improvements in sanitary hair brushes, in which a handle and frame or brush back is adapted to maintain a removable bristle block within the frame structure, the bristle block being disengageable from the back to permit thorough sterilization of the bristle block.

An object of this invention is to provide a twopart detachable brush having a non-washable metal back member and a washable bristle block member made of plastic material and locking means in coacting relation with both members to positively interengage the members in assembled relation.

Another object of this invention is to make the bristle block of modified trapezoidal crosssection, the bristle block having a flange extending around two equal sides and around a small end wall of the bristle block, the large end wall of the bristle block having an acute angularly shaped cavity with the vertex of the angle extending into the block, the metal back having hollow sides forming a raised circumscribing flange, the metal back having a spring movable into the cavity, whereby the bristle block may be inserted into the hollow back with the flanges of the bristle block underlying the flange of the metal back to be positively retained in interlocking engagement with the metal back on three sides, and the spring pressing against the large side of the bristle block to retain the bristle block in engagement with the metal back on all four sides.

With the above and other objects in view, the invention will be hereinafter more particularly described, and the combination and arrangement of parts will be shown in the accompanying drawings and pointed out in the claims which form part of this specification.

Reference will now be had to the drawings, wherein like numerals of reference designate corresponding parts throughout the several views, in which:

Figure 1 is a plan view of the santiary brush comprising a brush back made of metal and a detachable bristle block made of plastic material.

Figure 2 is a side view of the brush shown in Figure 1, the view showing in dot-and-dash lines the position of the bristle block in partly detached position from the brush back.

Figure 3 is a view of a fragmentary portion of the brush shown in Figures 1 and 2, the bristle block being broken away to show a spring clamp.

Figure 4 is a view of a fragmentary cross-sectional portion of the brush, the cross-section being taken on line 4-4 in Figure 3.

Figure 5 is a plan view of the bristle block.

Figure 6 is a side view of the bristle block;

Figure 7 is a view of a fragmentary portion of a modified brush back made of metal and av detachable bristle block made of plastic material.

Figure 8 is a view of a fragmentary portion of the modified two-part detachable brush, the circumscribing metal flange being partly broken away to show a portion of the flange pressed down to permit insertion of a three-sided flange on the bristle block into the circumscribing flange.

Figure 9 is a plan view of the bristle block shown in Figure 7.

Figure 10 is a side view of the bristle block shown in Figure 9.

In the illustrated embodiment of the invention, the numeral it: indicates a two-part detachable brush comprising an integral hollow handle ll and a hollow metal back l2 made of metal and a bristle block l3 made of plastic material. The bristle block I3 has bristles M suitably secured therein and extending from its outer face 15.

The hollow metal back I2 is in the form of a hollow frame having substantially U -shaped sides which form circumscribing front and rear flanges I6" and IS.

The metal back i2 is preferably fabricated from an elongated metal strip to the desired form of frame and the ends of the strip are housed in the hollow handle and fixed thereto to form a unit of the handle I l and the metal back f2.

The bristle block l3 has a. modified trapezoidal. cross-section defined by a small end wall defining. a cavity l8, two equal converging side walls 19, and a convex large end wall 26. The bristle block l3 has two thin tapering flange sections 2| ex.- tending partly around the two equal sides i9, ['9 of the bristle block [3.

The small end wall H} of the bristle block l'3 has a thin flange 22 forming a U-shaped unitwith the flange sections 2 l. The flange sections are made of a thickness to permit their insertion into the metal back l2 and below the front-flange l6 and below the free end portion of the top wall ll of the hollow handle II.

The large end wall 26 of the bristle block I 3 has an acute angularly shaped cavity 23 with the vertex of the angle extending into the bristle block so as to form an undercut wall 24 serving to receive a reversely bent retaining edge 25 of a leaf spring 26 which is fixed to a metal plate 2 1 which is suitably retained within the circumscribing metal back i2.

In operation, the bristle block i3 is inserted into the hollow frame-shaped metal back It with the U-shaped flange 22 underlying the rear portion of the metal back and the rear portion of the top wall of the hollow handle I and positively retained in interlocking engagement with the metal back on three sides. The leaf spring 26 moves into engagement with the wall 24 of the cavity 23 in the bristle block at the large wall of the block, and retains the bristle block in engagement with the metal back i2, by pressure against the bristle block in the same direction the block enters the metal back. All four sides of the bristle block are securely retained in engagement with the metal back l2.

As shown in Figure 4 the rear face of the metal back I2 is defined by an ornamental metal plate 29 which is inserted into the hollow metal back l2 into contact with the rear flange l5.

Adjoining the ornamental metal plate 29 is the metal plate 2'! having a rivet 3B which fastens the spring 25 thereto and which serves as a carrier for the spring 26 and for an elongated stiffener bar 3|. In practice, the bar 3| is suitably fixed to the metal plate 2?, such as by welding. The bar 3| extends lengthwise of and into the handle H and stiffens the handle and the metal back assembly.

Adjoining the metal plate 21 is a cardboard 32 which serves as a filler having cutouts through which the spring 26 and the stiffener bar 3b pass. The cardboard 32 provides a smooth surface :or a metal foil paper 33 having an adhered moistureproof metal coating on the outer face.

Figures 7 to 10 inclusive show a modified twopart detachable brush 35 comprising an integral hollow handle 36 and a hollow metal back 31 made of metal and a bristle block 38 made of plastic material and having bristles 39 suitably secured therein.

The hollow metal back 37 is in the form of a hollow frame having substantially U-shaped sides which form circumscribing front and rear flan es 4E! and Ail. The metal back 31 is preferably fabricated from an elongated metal strip to the desired form of frame and the ends of the stri are housed in the hollow handle 36 and suitably fixed thereto to form a unit of the handle 35 and the metal back 31.

The bristle block 38 has a modified trapezoidal cross-section defined by a straight small end wall 4|, two equal converging side walls &2, and a convex large end wall 43. The bristle block 38 has two thin tapering elongated flange sections 4 extending completely around the two equal sides 42, 42 and around the small end wall 4| of the bristle block 38.

The small end wall 4| of the bristle block 88 has a thin flange 55 forming a substantially U- shaped unit with the flange sections 54. The flange sections are made of a thickness to permit their insertion into the metal back 3'1 and inwardly, below the flange G and below the top wall 41 of the hollow handle 35.

The large end wall 43 of the bristle block 38 has an acute angularly shaped cavity 48 with the vertex of the angle extendingv into the bristle block so as to form an undercut wall 49 serving to receive a reversely bent retaining edge 50 of a leaf spring which is fixed to a metal plate 52 suitably retained within the circumscribing metal back 37.

In operation, the bristle block 38 is inserted into the hollow frame-shaped metal back 31 with the U-shaped flange 45 underlying the rear portion of the metal back and the rear portion of the top wall 41 of the hollow handle 36 and positively retained in interlocking engagement with the v the metal back 3?.

metal back on three sides. The leaf spring 5| moves into engagement with the wall 49 of the cavity 48 in the bristle block 38 at the large wall of the block, and retains the bristle block in engagement with the metal back 3'1, by pressure against the bristle block in the same direction the block enters the metal back. All four sides of the bristle block are thus securely retained in engagement with the metal back 31.

It is to be noted that in order to permit the substantially U-shaped flange 45 and the elongated flange sections 44 to enter into the hollow metal back 31, that a portion of the flange 4!! is pressed down or offset, starting at points 53, so as to make the convex or large end wall 54 of the metal back 31 thinner than the two sides of the said metal back.

The difference in the heights of these metal back sections is made to cause an opening 55 to be formed in the metal back 3?, equal to the thickness of the U-shaped flange i5 on the bristle block 38. This opening permits insertion of the three sided flange into the metal back 31 and clear of the convex end wall portion 5 of the flange 40.

This difference in thickness of the metal flange portions makes it possible to positively retain the bristle block 33 of the two-piece detachable brush 35 in interlocking engagement with the metal back 35 on three sides. tion, the spring 5| presses against the large convex end of the bristle block 38 and retains the bristle block in its undersuriace engagement with 'lhe spring urges the bristle block in the same direction in which the block enters the metal back. The bristle block 38 is thus positit ely retained on all four sides against lateral outaard mo.ement from the metal back.

In accordance with the patent statutes I have described and illustrated the preferred embodiments of my invention, but it will be understood that variois chan es and modifications can be made therein without departing from the spirit of the invention as defined by the appended claims.

I claim:

1. In a sanitary hair brush comprising a handle and brush back made of metal anda bristle block removable from said metal back to permit sterilization of said block, said metal back having hollow sides forming a raised circurnscribing flange, said bristle block being made of plastic material and having a modified trapezoidal cross-section with one large and one small end, a flange extending around two equal sides and around a small end wall of said bristle block, the large end of said bristle block having an acute angularly shaped cavity with the vertex of the angle extending into saidblock, said metal back having a spring fixed thereto and extending into said cavity, the large end wall portion of said metal back being thinner than the two sides of said metal back, providing an opening into said metal back whereby said three sided flange of said bristle block may be inserted into said hollow metal back with the flanges of said bristle block underlying the flange of said metal back and positively retained in interlocking engagement with said metal back on three sides, said spring being pressed into engagement with said metal back at the large side of said bristle block to retain said bristle block in engagement with said metal back on all four sides.

2. In a sanitary hair brush comprising a handle and brush back made of metal and being nonwashable and a bristle block made of washable in assembled rela-' plastic material and being removable from said metal back to permit sterilization of said block, said metal back having hollow sides forming a raised circumscribing flange, said bristle block v having a modified trapezoidal cross-section with one large and one small end, a flange extending around two equal sides and around a small end wall of said bristle block, the large end of said bristle block having an acute angularly shaped I cavity with the vertex of the angle extending,

into said block, said metal back having a spring extending into said cavity, the large end wall portion of said metal back being thinner than the two sides of said metal back, providing an opening into said metal back whereby said three sided flange otsaid bristle block may be inserted into said hollow back with the flanges of said bristle block underlying the surface of said metal back flange to be positively retained in interlocking engagement with said metal back on three sides and the spring pressed into engagement with said metal back at the large side of said bristle block to retain said bristle block in engagement with said metal back by pressing against said bristle block on all four sides.

3. In a sanitary brush comprising a handle and brush back made of metal, and a bristle block made of plastic material and being removable fromsaid metal back to permit sterilization of said bristle block, said metal back having hollow sides forming a raised circumscribing flange, said flange extending into said handle, the small end wall of said bristle block having a a cavity, the free end portion of said handle extending into said cavity, said bristle block having a modified trapezoidal cross-section with one large and one small end and a U-shaped flange extending around two equal sides and around the small end wall of said bristle block, the large end of said bristle block having an acute angularly shapedcavity with the vertex of the angle extending into'said block, said metal back having a spring fixed thereto and extending into said I cavity, the large end wall portion of said metal back being thinner than the two sides of said metal back, providing an opening into said metal back whereby said three sided flange of said bristle block may be inserted into said hollow around two equal sides and around the small end Wall of said bristle block, the large end of said bristle block having an acute angularly shaped cavity with the vertex of the angle extending into said block, said metal back having a spring fixed thereto and extending into said cavity, the large end wall portion of said metal back being thinner than the two sides of said metal back, providing an opening into said metal back, whereby said three sided flange of said bristle block may be inserted into said hollow back with said J-shaped flange underlying said U-shaped portion of said metal back and positively retained in interlocking engagement with said metal back on three sides while the spring presses into engagement with said bristle block at the large side of said block .to retain said bristle block in engagement with said metal back by pressure against said bristle block in the same direction said bristle block enters said metal back and on all four sides thereof.

5. In a sanitary brush comprising a handle and brush back made of metal, and a bristle block made of plastic material and being remov- ,.able from said metal back to permit sterilization of said bristle block, said metal back having hollow sides forming a raised circumscribing flange, said metal back comprising a substantially U-shaped portion, a small end wall and a large end wall, the small end wall of said bristle block having a cavity, the free end upper portion of said handle extending into said cavity, said bristle block having a modified trapezoidal cross-section with one large and one small end and a substantially U-shaped flangeextending around two equal sides and around the small end Wall of said bristle block, the large end wall of said bristle block having an acute angularly shaped cavity with the vertex of the angle extending into said block, said metal back having a spring fixed thereto and extending into said cavity, the large end wall portion of said metal back being thinner than the two sides of said metal back, providing an opening into said metal fb'ack whereby said three sided flange of said bristle block may be inserted into said hollow metal back with said U-shaped flange underlying said U-shaped portion of said metal back and positively retained in interlocking engagement with said metal back on three sides while the [spring presses into engagement with said bristle .jlblock at the large end wall of said block to reand brush back made of metal, and a bristle block made of plastic material and being removable" from said metal back to permit sterilization of I said bristle block, said metal back having hol-Pf low sides forming a raised circumscribing flange;

said flange extending into said handle, said metal back comprisingv a U-shaped portion, the small" end wall of said bristle block having a cavity, the free end portion of said handle extending into said cavity, said bristle block having a modified trapezoidal cross-section with one large and one small end and a U-shaped flange extending am said bristle block against lateral outward "movement from said metal back on all four sides q 5 thereof.

MAX H. STORCH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 959,574 Moore May 31, 1910 1,735,802 Statuto Nov. 12, 1929 FOREIGN PATENTS Number Country Date 8,126 Great Britain of 1885 17,527 Great Britain of 1912

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