US1026142A - Hair-pin. - Google Patents

Description

L. G. BELZ.

HAIR PIN.

APPLICATION rmm NOV. 20. 1911.

1,026,142. Patented May 14, 1912.

F162 1. F152. F'Ia 3- FILE 4 UNITED STAiigiPATEZNT OFFICE.

" LcUIs c. BELZ, or PHILADELPHIA, PENNSYLVANIA;

.- HAILRFPINI T all whom it may concern:

Be it known that L LOUIS C. BnLz, a citizen of the United States, and a resident of Philadelphia, county of Philadelphia,

5 State of Pennsylvania, have invented an Improvement in Hair-Pins, of which the following is a specification.

My' invention has reference to hair pins and consists of certain improvements fully 'set forth in the following specification and shown in the accompanying drawings which form a part thereof.

, My invention has reference to hair pins of the general character illustrated in Let- 1 5 ters Patent No. 975,390, granted to me on November 15,1910, and whichparticularly embodies a central twisted wire pro; .1 and two outer single strand untwisted prongs, and my present improvement is more especiallydirected to certain details of construction thereof, whereby the hair pin is more efficient in use and devoid. of certain objections more or less inherentto the construction of the'hair pinof'my aforesaid Letters Patent.

My invention consists of certain constructions in athree pronged hair pi which are fully described hereinafter inconnec tion with the drawings andi'speeifi ally defined in the claims. i.

Referring'to the drawings: Figure 1 1s a side elevation of a hair pin embodying my invention made, on a large scale for better illustration of the details; Figs. 2 and 3 are elevations of wire strands suitable 1 for employment in the making of my im'-.

proved hair pin; and Fig. 4: is an elevation of my-improved hair pin with sinuosities 1n the side prongs.

My invention consists of a three-pronged hair pin formed of a single strand of wire bent upon itself and twisted to form the middle prong, and the ends of. the said strand bent back substantially parallel to the twisted prong to form the side prongs,

and inwhich further the strand portion forming the middle twisted prong is of less cross sectional areathan that of the strand portions forming the side prongs, the

'50 twisted middle prong having the main part of its length, including the point, formed .with a twist of large pitch, and that portion 1 l of its length adjacent to the branching part where it is extendedinto the side prongs 5 formed of a small pitch providing a strong construction.- at the head of the hair pin.

Specification of Letters Patent.

' Patented May14, 1912.

Application filed November 20, 1911. Serial No. 661,260.

be straight, as indicated in Fig. 1, or with sinuosities 7, as indicated in Fig. 4. The middle and side prongs are all formed of one continuous metal strfand. having the general shape indicated in Figs. 2 and 3, the cross section of the wire strand which 1S twisted upon itself to form'the middle prong .3 being materially less in area than the cross sectional area of the side prongs 2, this difference being preferably about 2 to 1, so that the middle rong will not be objectionably bulky and will have reasonable and pro er elasticity. The main length of the mid 1e prong, from its end 4 up toward the bend 6, is formed with a twisted construction of great pitch so as to form very slight inclinations in the twisted portions to the direction of the length of the prong, whereby the prong will enter the hair with reasonable freedom and without putting any -ob ect1onable friction thereon, such as would occur where the wire strands are tightly twisted upon themselves and with smaller pitch.- The upper end of the middle prong adjacent to the bends 6, 6, of the sideprongs,

is twisted with a small pitch, as indicated at 5, for the purpose of making a strong union between the two strands thus twisted together, and also providinga termination of the strands which will enable them to be bent tangentially away from the middle'loo prong and thence downward to form the side prongs, thereby giving to the headof the hair pin a semi-circular form which will not catch upon the hair or provide a notch in which the hair may become entangled. Moreover, this tightly twisted portion 5 of the middle prong being made of portions of the strand which are of-grcater cross section than thecross section of the portion.

of 'the strand making up the main "part of the middle prong, the cross sectional area of the metal in this part 5 is greater than the the hair pin. is at. the branching point of the prongs,"and

cross sectional area of any other part 01 This is desirable, because it secondly,rit. provides a twisted portion oi":

' coarser strands adjacent to the head portion which willproduce a more rasping effect upon the hair and'hence act as a lock due to its friction to hold the hair pin in place after being once fully pushed home.

' Referring to Fig. 2, the strand there shown has the end portions 8 of the cross section of the side prongs 2 of the hair pin,

' and has the middle portion 9 reduced to the.

cross section of the strand which is to be embodied in the twisted middle prong 3 of the hair pin. The portions 10 of the wire strand shown in Fig. 2 are of a cross sec tional area intermediate tothose of the parts 8 and 9 and which, when twisted together, provide the part 5 of the finished hair pin. This strand shown. in Fig. 2 is bent upon itself in themiddle, and the part 9 thereof twisted with a large pitch to form the middle, prong 3; thetwo partslO are then twisted together with a small pitch tav form the part 5 of the middle prong 8. The

remaining parts 8 are then bent outward and downward to form the parts 6 and 2 of the hairpin. It is evident that the fine pitch twist 5 may be carrieddown somewhat into the smaller cross section of the strand and likewise into the larger cross section of the strand, if so desired, but ordinarily, it will 'sullice that this line pitch twisted port-ion 5 be substantiallv confined to the portions 10 of the intermediate cross sectional area.

In the construction of strand shown in I Fig. 3, the reduction in the same between the parts 8- and 9 is made more gradual as indicated at 10*, these tapered portions corre sponding to the portions of reduced area, indicated at 10 in- Fig. 2. When the strand, Fig. 3, is employed in making the hair pin, it is bentand twisted in the same way as "above described, and in this case,the part 5 having the small pitch will bemainly composedv of the tapered portions 10;

It is evident that while my invention, n its most perfect form, comprehends the making of the hairpin from the strand of the Some of theadvantages secured'by my improvements herein set out, are that the tightl twistedportion 5 at the branching points prevents the hair getting into the twisted portion, also increases the strength this nbint. also provides a shape at the helping to hold the pin'in place.

union of the parts 6wh'ich approximates a semicircle for the head of the pin, and further acts as a. locking portion on the hair when the hair pin is drivenhome, thereby twisted portion of great pitch, constituting the main part of the middle prong of the pin, enables the same to enter the hair more freely than would be possible'with the twist of fine p tch and further provides a more slender and flexible middle prong.

The hair pin, as a whole, is usually ja- .pannedto give the .necessa finish. Where the prongsnmte there woul be more or less spring action if the pitch .was large and such spring action would tend to crack the Japan and thereby providefabra'ding portions which. would catch and break the hair,

but by employing the tightly twisted por-,

tion 5 of small pitch and with the tangential 35 portion 6, this d fiiculty is entirely overcome, and a highly efiicient hair pin is pro duced without any objectionable qualities.

I have described my hair pin inthe form which I have found most-satisfactory for. commercial use, and while I'prefer the details here shown, they may be modified within the scope of' the appended claims without depart ng from the spirit of the invention. I Having now described-my invention, what ters Patent, is:

l. A hair pin formed of a single strand 1 claim as new and'desire to secure by Letbent upon itself'and twisted to form amid dle prong and the two free ends of the strand bent substantially parallel to the twisted prong to form two sideprongs, and in which further the twisted middle prong is composed partly of a twist of great pitch extending to the-free endof the prong and partly of a twist of relatively small pitch adjacentto the branching parts connecting with the side prongs. a

2. A hair pin formed of a single strand bentupon itself and twisted to form'a middle prong and. the two free ends of thejstrand bent substantially parallel to the twisted prong toform two sideprongs, and in which further the twisted. middle prong is composed partly of a twist of great pitch extending to the freeend of the prong and partly of a twist or" relativelysmall'pitch adjacent to the branching parts connecting with the side prongs, the cross sectional area ofthe strand forming the twisted part. of. p v great pitch being. smaller than. the cross-" sectional area in any other-part of the. hair pin and the part of the strand formin'g...that' portion of the twisted middle prong of relatively small pitch being of substantially uniform but of less cross sectional area than the cross sectional areaof the side prongs and of greater cross sectional area'than the cross sectional area oi the strand in the remaining portion of thetwisted middle prong.

The

end portions. of a diameter intermediate of the dialmeters of the central and end portions and of greatly less length.

than the length of either of the central or end portions, the said wire being bent upon itself to form three prongs and in which the union of the three prongs is formed of :1

"twisted portion of fine pitch formed from the portions of intermediate diameter and in which further the portions of largest diameter are bent tangentially from the twisted portions in opposite directions to form a substantially semi-circular head with the central prong extending radially inward.

In testimony of which invention, I here- 20 unto set my hand.

LOUIS o. BELZ.

lVitnesses R. M. KELLY, E. W. SMITH.

Images