Title:
Folding tooth brush
United States Patent 2083728


Abstract:
It is the object of my invention to produce a collapsible tooth brush which, when extended, will be adequately large and rigid for its intended purpose but which can be folded into a small space to be carried in a pocket or purse. Among the more specific objects of my invention are to produce...



Inventors:
Mayer, Harry G.
Application Number:
US75441734A
Publication Date:
06/15/1937
Filing Date:
11/23/1934
Assignee:
Mayer, Harry G.
Primary Class:
Other Classes:
15/176.1
International Classes:
A46B5/00
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Description:

It is the object of my invention to produce a collapsible tooth brush which, when extended, will be adequately large and rigid for its intended purpose but which can be folded into a small space to be carried in a pocket or purse. Among the more specific objects of my invention are to produce a construction in which the case which encloses the tooth brush when it is folded will act as a portion of the handle when the tooth brush is extended. A further object of my invention is to provide a tooth brush of the kind described with a removable brush-insert or refill.

In carrying out my invention, I make the handle of the tooth brush.in three parts, one of which is in the form of a casing open at one side. To one end of this casing there is pivotally attached the intermediate portion of the handle which telescopically receives the third portion, the brush proper being removably mounted in this third portion of the handle. The relatively movable parts of the handle embody co-operating provisions which resiliently hold them in extended position but which can readily be released to permit the brush to be folded into the casing portion of the handle.

The accompanying drawing illustrates an embodiment of my invention: Fig. 1 is an isometric view showing the brush in extended condition; Fig. 2 is a longitudinal section through the ex80 tended brush; Fig. 3 is a plan view of the extended brush with parts thereof broken away; and Fg. 4 is a view similar to Fig. 2, showing the brush partially collapsed in dotted-lines and completely collapsed in full-lines.

-The brush-body or handle illustrated in the drawing comprises three interconnected sections 10, II, and 12 which may conveniently be formed as sheet-metal stampings. The section 10 is in the form of a casing having generally parallel side walls 13 and open at one face between such side walls. Between the side walls 13 and at one end of the casing 10, such casing is pivotally connected to the intermediate section II of the Shandle, which is generally of channel crosssection with the upper edges of the parallel legs of the channel being bent inwardly to form flanges 14. At its end adjacent the casing 10, the section II is provided with ears 15 of circular conformation which are conveniently formed as continuations of the side walls of the section II and which are spaced apart a sufficient distance to be snugly received between the side walls IS of the casing 10.

The means for pivotally interconnecting the casing I0 and intermediate section II of the handle may take various forms, that shown in the drawing comprising a post 16 which extends transversely of the section 11 between the ears 15 and which has in its ends axial screw-threaded openings for the reception of pivot screws I1 that pass through suitably positioned holes in the side walls 13 of the casing 10. As is clear from Fig. 2, opening movement of the intermediate section relative to the casing 10 is limited by the engagement of the end of the bottom wall of the section II with the end of the bottom wall of the casing 1d.

The outer section 12 of the handle is preferably of channel cross-section similar to that of the section II with the outer edges of its side walls bent inwardly to form flanges 20. The section 12 is slidably received within the section 11, the side walls of the two sections having a slight longitudinal taper, shown exaggeratedly in Fg. 3 of the drawing, so that the section 12 will be firmly supported from the section II when extended.

The brush proper comprises a back 21 in which are mounted suitable tufts of bristles 22. The back 21 is provided on its opposite sides with slots 23 for the reception of the in-bent flanges 20 on the section II, as is clear from Fg. 3. Provision is made for releasably holding the brush in proper position in the handle-section 12, the expedient shown in the drawing for this purpose comprising notches in the flanges 20 positioned to receive slight projections 24 which extend outwardly from the bottoms of the grooves 23 in the brush-back 21. Preferably, the brush-back is provided with a longitudinal slot 25 providing sufficient resiliency to permit the projections 24 to be forced into and out of the notches in the flanges 20. The side walls of the section 12 may continue around the outer end of such section in the form of an arcuate flange 26 providing an abutment for the brush-back 21.

When the brush is folded, the various parts occupy the positions illustrated in'full-lines in ig. 4, the section II of the handle closing the open face of the casing 10. To completely close the casing 10, the section II may be provided with an arcuate closure member 30 extending between the circular ears 15 and conforming to their shape. To open the brush, the section II is swung from the full-line to the dotted-line position shown in Fig. 4, and the section 12 is then moved outwardly in the section II to the position illustrated in Fig. 2, when the brush is ready for use. To aid in holding the casing 10 and the intermediate handle-section II in extended position, one of the side walls 13 of the casing may be provided with an inwardly extending projection S31 adapted to be received in a recess in the corresponding ear 15 when the brush is extended.

The resilience of the material of which the handle-sections are formed is sufficient to permit engagement or disengagement of the projection 31 and its associated recess. The side walls 13 of the handle 10 may also be provided with ventilating openings 32.

To replace the brush, the handle section 12 is held in extended position relative to the section 1, as illustrated in Fig. 3, and the brush is moved inwardly to the dotted-line position illustrated in that figure, where it lies wholly within the section- II. The distance between the flanges 14 of the section I I is somewhat greater than the width of the brush-back 21; so that when the brush is in the dotted-line position shown in Fig. 3, it can be lifted out of association with the handle.

I claim as my invention: 1. In a collapsible tooth brush, a handle-section of channel cross-section having inwardly directed longitudinally extending flanges along its edges, a brush having a back provided with outwardly projecting longitudinal flanges slidably received beneath the flanges on said handlesection, and a second handle-section of channel cross-section slidably receiving said first handlesection, said second handle-section having inwardly directed longitudinal flanges along its edges to retain said first handle-section, the flanges on said second handle-section being g spaced apart a distance sufficient to permit said brush to be removed between them after having been slid from said first handle-section into said second handle-section.

2. In a collapsible tooth brush, a handle-section, a brush slidably mounted in said handle section, and a second handle-section movable relatively to said first handle-section, said first handle-section having an open end to permit said brush to be slid into said second section and said second section having a laterally directed opening through which said brush may be passed.

3. In a folding tooth brush, a handle-portion of channel cross-section having inwardly directed longitudinally extending flanges along its edges, a brush having a back provided on opposite sides with longitudinally extending grooves adapted to receive said flanges, the inner edges of said flanges being provided with one or more notches, and one or more projections formed in the bottom of the grooves in said brush-back in position to co-operate with said notches to hold the brush in place in the handle-portion.

HARRY G. MAYER. 30