US1170508A - Safety-pin. - Google Patents

Description

J. H. BOYE.

SAFETY PIN.

APPLICATION FILED MAY 5, 1915- 1,170,508. Patented Feb. 8,1916.

THE COLUMBIA PLAIjDGRAPH c0., WASHINGTON, n. c.

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JAMES H. BOYE, OF CHICAGO, ILLINGIS, ASSIGNCP. TO THE BOYE NEEDLE COJVI'PANY,

OF UHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

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Specification of Letters Patent.

Patented Feb. a, rare.

Application filed May 5, 1915. Serial No. 25,907.

To all whom it may concern. I

Be it known that 1, James H. BoYE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Safety-Pins, of which the following is a specification.

My invention relates particularly to safety-pins; and my primary object is to provide a safety-pin which will be secure under the severest conditions of usage.

A further object is to obviate the danger of the coil portion of the pin becoming caught or interlocked in the fabric, or clothing, in use.

A still further object is to cheapen the cost of manufacture of safety-pins.

The invention is illustrated in its preferred embodiment in the accompanying drawing, in which- Figure 1 shows the improved safety-pin in open condition; Fig. 2 shows an edge view of the pin closed; Fig. 3 shows the pin closed and partly in section; Fig. 4: shows a section taken, as indicated, at line 4 of Fig. 8; and Fig. 5 a section taken as indicated at line 5 of Fig. 3.

The safety-pin, in the form illustrated, comprises arms 1 and 2, having their base portions united by a one-turn coil 3. The main arm has its free end equipped with the usual keeper i. The arm 2 has its free extremity pointed. The pin is preferably formed of pianosteel wire, which is curved at its central portion to form the coil 3. The coil is closed at its outer or back edge 5; and the curvature of the wire members is continued from the point 6 at the inner or front edge of the coil to afford the partial or rudimentary convolutions 1 and 2. The wire members are then reversely curved to afford with the partial convolutions 1" and 2 fabric receiving concavities 1 and 2 which are disposed back of or below the top point 6 of the coil. The arms 1 and 2 are carried by the reversely curved portions of the wire members which unite the base portions of the arms to the rudimentary convolutions. Thus, the concavities 1 and 2 flank the upper or inner edge of the coil 3, so that the cloth or fabric will be deflected or guided into the concavity when strain is exerted. In this manner, the cloth or fabric will be effectually prevented from working into the coil, thus avoiding the danger of tearing the fabric and also assuring the easy withdrawal of the pin.

The curves at the base portions of the arms 1 and 2 are of such character that the arms'will be substantially parallel when the point of the pin is confined in the keeper, thus avoiding the familiar bow of the safety-pin, which results in the point slipping from the keeper when under strain. The concavities at the base portions of the arms and flanking the coil also tend to prevent the fabric from exerting undue bending strain upon the middle portions of the arms, as the tendency is for the fabric to wedge or bunch within the concavities.

T have found that a one-turn coil, especially when supplemented by the partial coils i and 2 will suiiice to give ample resiliency in a safety-pin constructed as above described, and that the arms will possess suiiicient stiffness to prevent the pin oecoming unfastened accidentally even under the most severe conditions of usage. If desired, however, the coil 3 may be formed with more than one turn or complete convolution. The wire maybe of smaller gage than is commonly employed, and some economy in manufacture may be gained by the use of less than the usual number of complete convolutions, it being remembered, of course, that safety-pins are manufactured in very large quantities. The most important advantage is gained, however, by the use of the concavities 1 and 2 so disposed with relation to the coil that the fabric will be guided into the concavities and prevented from entering or becoming entangled in the coil. It will be noted that in the construction illustrated the concavities lie back of the line a-a which is drawn tangential to the inner portion of the coil. The concavity is especially useful at the base-portion of the pointed arm 2-, since the manner of entering the pin tends to cause the fabric to enter that concavity. It is preferred, however, to make the base-portion of the safetypin symmetrical both for the sake of appearance and because the fabric sometimes shifts to the concavity at the base-portion of the arm 1, depending upon the position and the direction of the exertion of the strain.

The foregoing detailed description has been given for clearness of understanding, and no unnecessary limitation should be understood therefrom.

What I regard as new and desire to secure by Letters Patent is: A safety-pin, comprising a Wire having a coil terminating in partial convolutions which extend a substantial distance back from the inner edge of the coil, reversely curved portions carried by said partial c011- volutions and forming therewith similar concavities adapted to accommodate fabric 10 therein and thus prevent the fabric from entering the coil, arms extending from said reversely curved portions, one of said arms having a pointed extremity, and a keeper at the extremity of the other arm adapted to receive said pointed extremity.

JAMES H. BOYE.

In presence of- O. E. AvrsUs, D. C. THORSEN.

Copies of this at-ant may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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