US1358139A - Hairpin - Google Patents

Description

C. A DIES.

HAIRPIN.

APPLICATION FILED FEB. 19. 1920.

Patented Nov. 9, 1920.

UNITED STATES PATENT OFFICE.

specification of Letters Patent.

Patented Nov. 9, 1920.

Application filed February 19, 1920. Serial No. 359,863.

To all whom it may concern.

Be it known that 1, CHARLES A. DIES, a citizen of the United States of America, and a resident of Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Hairpins, of which the following is a specification.

This invention relates to that type of elongated U shape hair pins the parallel prongs of which are formed with corrugations to retard gradual detachment of the hair pin in actual use.

The present improvement has for its object, to provide a structural formation of parts, of a hair pin whereby an integrally formed means is provided and which is adapted to provide a very effective resistance to movement in the hair of the user, and which means as applied to the crown of the hair pin affords a convenient hand grasp for manual operation, all as will hereinafter more fully appear.

In the accompanying drawing Figure 1, is a front elevation embodying the preferred form of the present invention.

Fig. 2, is a side elevation of the same.

Fig. 3, is a transverse sectional elevation on line 3-3 Fig. 1.

Fig. 4, is a detail horizontal section on line 4-4 Fig. 1.

Like reference numerals indicate like parts in the different views.

Referring to the drawing, 1 designates the approximately parallel tines or prongs of a wire or like hair pin integrally connected together at one end by a crown or arch portion 2, the respective parts being preferably of the usual circular form in cross-section.

The present invention in such ordinary type of hair pins as well as in other approximating types of hair pins, more or less in general use, comprises a structural forma tion as follows 3 designates a plurality of slits formed at intervals the mid-thickness of the prongs 1, and preferably in planes parallel with the front of the hen pin. The slits 3 provide counterpart sections which are adapted to be displaced laterally and in opposite directions to form a series of curved humps 4 at the respective sides of the prongs 1 as shown, and adapted to afford the required retardments to movement of the hair pin in actual use. 1

In the manufacture of the present hair pin from metal wire, the slits 3 and humps 4 will be formed by the operation of suitable dies acting to effect such operations in one movement of such dies. When ductile material, such as celluloid is employed, suitably formed molds or forms will be used to mold such material into the described shape.

5 designates a slit similar to the slits 5 above described formed in the crown portion 2 of the hair pin and in the same direction, and which in like manner provides humps or bulges 6 of different radii and adapted to afford an effective finger grip for grasping the hair pin, and at the same time impart increased stiffness to said crown 2.

Having thus fully described my said invention what I claim as new and desire to secure by Letters Patent, is

1. A pin prong having a local longitudinal slit, the sections formed by said slit being displaced in opposite directions to form twin humps.

2. A hair pin, the prongs of which are formed with local longitudinal slits, the sections formed by said slits being displaced in opposite directions and in planes parallel with the front of the pin to form humps.

3. A hair pin having prongs and a connecting crown, said crown having a local longitudinal slit, the sections formed by said slit being displaced in opposite directions and in a plane parallel with the front of said crown.

Signed at Chicago, Illinois, this 16th day of February, 1920.

UHARLES A. DIES.

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