Патент USA US2403601код для вставки
July 9, 1946- ' ' J. JACKSON ' HAIR-GRIP ' PIN ' ' - 2,403,601 I Filed Feb. 9, 1943 *pgl. ‘v15’ v11- INVENTOR - Jules Jackson B , ~ - ATTORNEYS a ‘ ' 3-29 2,403,601 Patented July 9, 1946 * UNITED STATES PATENT OFFICE 2,403,601 HAIR-GRIP PIN Jules Jackson, New York, N. Y. Application February 9, 1943, Serial No. 475,249 2 Claims. (01. 132—48) 2 1 It is among the objects of the invention. to pro vide a hair-grip pin which shall inherently exert to touch the edges of the teeth and the attractive ness of the pin is moreover enhanced. , In a preferred embodiment, shank II has a effective pressure upon the width of the strand of unitary hook extension l6 at the free end there hair being held thereby, which shall maintain of which in locked position of the pin closely such pressure unrelaxed as long as the pin is in embraces the extremity of the unhooked shank place, which shall be attractive in appearance and iii. The extremity of the straight shank l0 en relatively low in cost, which may be easily ap gages the middle of the loop 26, while the free plied and easily removed, and which in its pre end ll of the loop engages the outer face of the ferred embodiment shall avoid the use of metal. In the accompanying drawing in which is shown 10 shank ill when the pin is closed. As will appear from Fig. 3, the hair-grip pin one of various possible embodiments of the sev when made of plastic may be bentin the correct eral features of the invention, manner for application, with the same facility as Fig. 1 is a lateral edge view of the hair-grip a steel pin. The hair-pin turn l2, by reason of pin on an enlarged scale with parts broken away, Fig. 2 is a side elevation of the pin shown 15 its thickness, is stiff and will not spread when the free ends are drawn apart asv shown in Fig. 2. closed, Moreover, each shank will be bowed on a uniform Fig. 3 is a perspective view showing the pin arc of large radius, by reason of the fact that the spread apart for application or removal from the teeth it act as beam stiffeners, and the ?exure hair, and ' Fig. 4 is a transverse sectional view taken on 20 will occur at the uniformly spaced troughs be tween the teeth, as indicated. The pin, when line Ii—4 of Fig. 2. made of cellulose acetate plastic, will thus ?ex Referring now to the drawing, there is shown substantially in the manner of the conventional an integral hair-grip pin comprising a pair of hair-grip pin, and will suffer no undue strain in generally para1le1 shanks l0 and ll, of suitable such ?exure. Such plastic pin has sufficient elas length, ordinarily about two inches, of thickness considerably less than their Width and which have the hair-pin turn connection I2 between their root ends l3. In a preferred embodiment, the shanks are thickened progressively at said root ends l3 to maximum thickness at the hair pin turn l2. . ‘ The major part of the length of each shank desirably midway between the ends thereof, has a sequence of tapering teeth M rising from the inner face thereof. Any desired number of teeth C13 Lil may be used and these are of uniform height, width and thickness, each being preferably in the form of an isosceles triangle with a rounded ver tex. In one practical embodiment the base of ticity to return to closed position, in which the free end of the straight shank 10 may readily be inserted laterally into the hook Hi. In use, it will be seen that the teeth l4 act substantially as a comb in spreading the hair uniformly therebetween as the pin is applied. Considerable pressure is exerted upon the hair clamped between the intermeshing teeth and that pressure is substantially uniform along the toothed area and is effectively maintained throughout. The effectiveness of the grip results from the holding effect of the locking hook com bined with the stilfening effect due to the I-beam cross-section of the locked pin as shown in Fig. each tooth is 1% inch long, and its vertex angle 40 4. The pin is as readily removed as it is applied. As many changes could be made in the above about 100 degrees. As indicated in the drawing, construction and many apparently widely differ there may be twelve teeth on shank ll and'thir ent embodiments of this invention could be made teen teeth on shank E0, the teeth being arranged without departing from the scope of the claims, on the shanks so as to intermesh when the pin is closed as shown in Fig. 2. Thus the teeth on 45 it is intended that all matter contained in the above description or shown in the accompanying shank l0 engage and straddle all those on shank drawing shall be interpreted as illustrative and l l. Desirably, the overall thickness of the closed not in a limiting sense. hair-grip pin is less than T8; inch. Having thus described my invention, what I Preferably, the teeth are of thickness less than the Width of the shank and midway between the 50 claim as new and desire to secure by Letters Patent of the United States is: lateral edges of the shank. Desirably each shank 1. An integral hair-grip pin of plastic material is about 1/8 inch wide and the teeth ‘115 inch thick, comprising a pair of generally parallel shanks of so that the teeth are ?anked by the lateral ledges thickness less than their width, a hair-pin turn I5 of the shank, and each of said ledges is about £5 inch wide. The user’s ?ngers are thus not apt 55 connection therebetween, said connection being 2,403,601 3 of thickness greater than that of said shanks, each of said shanks having unitary tapering teeth at the inner face thereof, the teeth of the respec tive shanks intermeshing when the pin is closed, said teeth being of thickness less than the width 4 sively increasing near the root ends thereof to maximum thickness at said hair-pin turn, inter meshing teeth unitary with and protruding from the inner faces of the respective shanks beyond said root ends, said teeth being of uniform width of the respective shanks and substantially mid way between the lateral edges of said shanks, so that in closed position they determine with the shanksa stiffened I-beam structure. and height, means clamping the pin in closed position when in use, said teeth being oi thick ness less than the widthvand midway between the of generally parallel shanks connected by a hair pin turn, said shanks being of thickness progres eneq I-beam structure. lateral edges of the shanks, so that in closed 2. An integral hair-grip pin comprising a pair 10 position they determine‘ with the shanks a stiif JULES JACKSON.