US2773292A - Pin stem finding - Google Patents

Description

Dec. l1, 1956 A E SAUER 2,773,292 PIN STEM FINDING Filed Jn. '7, 1954 .E9n O 8.

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ATTORNEYS.,

United States Patent() PIN STEM FINDING Alfred E. Sauer, Warwick, R. I., assignor to B. A.. Ballon & C0., Incorporated, a corporation of Rhode Island Application January 7, 1954, serial No. 402,7sz s claims. (C1. z4-1s7) This invention relates to a pin stem finding such for instance as a safety catch or a pin stem joint.

Pin stem findings of this character frequently have their base soldered upon the article on which they are to be mounted for functioning with a pin stem. More recently the pin stem findings of this type have had anchoring portions extending from the base enabling them to be molded into the article with which they are to be assembled by positioning the finding in the mold and then casting the article about the anchoring portion of the finding. Such findings have usually been made so that the anchoring portion is solid and the slot in which the pin stem or the rotor part of the safety catch moves is spaced from the plane of the back surface of the article which is cast and there is no danger that the metal of the cast article will run into the slot and interfere with the operation of the hinge joint of the pin stem or the rotor of the safety catch.

Pin stem findings such as the type referred to have heretofore been made by folding up two ears from a piece of flat stock thereby forming a base as well as the two ears extending therefrom, but this has not been used where an anchor portion is provided, as the slot extends into the anchor portion leaving an open slot into which the cast metal may extend to interfere with the functioning of the pin stern or the rotor of the safety catch.

One of the objects of this invention is to provide a pin stem finding which may be folded up to provide ears extending from an integral base and yet have an anchor portion which will be so arranged that the cast metal of the article will not interfere with the functioning of the finding.

Another object of the invention is to so shape the nding that when it is folded into position, there is a barrier formed which will prevent the cast metal from moving into the portion of the slot where the pin stem or the rotary part of the safety catch operates.

Another object of the invention is to form the barrier from the stock of the material of the ears so that no additional assembly operations are required for performing the desired function.

With these and other objects in view, the invention consists of certain novel features of construction as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Figure 1 is a sectional view through a safety catch mounted on a jewelry article and showing the barrier which is provided to block the cast material from flowing into the slot between the ears where the moving portion is located;

Figure 2 is a plan view of the catch before folded into final position, showing the inside surface thereof;

Figure 3 is a plan view of the opposite surface from that shown in Figure 1, showing the outside surface thereof;

Figure 4 is a sectional View of the structure shown in Figures 2 and 3;

Figure 5 is a central sectional view of a modified form;

Figure 6 is a View similar to Figure l of' a modified form of Figure 5;

Figure 7 is a sectional view similar to Figure 6 but showing a still different modified form;

Figure 8 is a sectional view showing the structure of Figure 7 prior to folding into position shown in Figure 7.l

In proceeding with this invention, I form a pin stem finding which may take either the form of a safety catch or a pin stem joint by striking the finding to provide the desired shape of the ears, base, and anchor portion and then folding at a mid point to bring the ears into sub stantially parallel relation with a slot between the ears'. The body portion of the catch is provided with a flange and an anchor portion extends below this flange which may be molded into the article of jewelry with which the finding is to be assembled. By reason of this construction the slot extends into the anchor portion and there is danger that the material which is to be cast about the anchor portion will not only extend into the slot but will .run up the slot so as to interfere with rotation of any member in the slot, and in order to avoid this, I have provided a barrier formed by shaping of the side walls of` the slot so that the cast material cannot run along this:

ried by the finding.

With reference to the drawings, 10 designates generallyy a safety catch which has been struck from a metal mate`` rial to shape it so as to provide ears 11 and 12 which are; recessed as at 13 and 14 to provide bearing portions for` a rotor member 15 between them which serv-es to retain the pin stem in position when moved to the suitable location. These ears are each provided with a flange 16 and 17 on their outer portions, and below this flange there is provided an anchor portion designated generally 18 and which comprises a half 19 on one ear 11 and a half 20 on the other ear 12. A suitable recess 21 is provided centrally and on the outer surface so as to dene a line of folding, and as folding of the ears occurs at the center portion, there is somewhat of a stretching of the portion 22 of the anchor so that the end of the anchor 23 will be substantially flat, as shown in Figure 1, and so as to provide a slot 24 between the ears in which the flange portion 25 of the rotor member 15 may be guided.

This anchor portion 18 is to be molded. into an article such as an article of jewelry 25 by positioning it in the mold and casting the jewelry article 25 about the anchor portion. The location is such that the upper surface 26. of the article will engage the flanges 16 and 17 and pro-A vide a good support against rocking of the finding upon the article 25. Some of the molding material such as' erally 28 which may comprise several different forms.

In the form shown in Figure 1 there is a recess 29 and;

a tongue 30, the recess being formed in one of the ears such as 11, and the tongue being provided in the other ear, such as 12, the tongue extending into the recess so that a barrier is provided across the slot to prevent the,l molten material from moving upwardly in the slot toblock the operation of the rotor 15 or to block the opera-- tion of a pin stem at its joint.

In some cases as shown in Figure 6, there may be a protnberance 31 on ear 11 and 32 on ear 12 of substantially identical construction extending from opposite sides. of the slot and formed the same on each ear so as to:

abut -as at 33and provide a barrier to prevent the movement ofthe material 27 upwardly in the slot.V

In other cases such as shown in Figure 7, protuberances 34 and 3S may be provided on opposite ears 11 and 12 which are so arranged that they will slide one past the=other slightly4 and in firm engagement, possibly one being deected slightly by the -other by reason of their wedge shape so as to provide a tight joint and' barrier across the slot. ln this case ,the material 27 will be like- Wise blocked from extending up into the slot 24.

I claim: t

1. A pin stem nding comprising ears secured together at their lower extremity and spaced to provide a slot between them, said ears having ananchor portion adjacent,

their lower extremity for mountingin a molded article and a barrier extending across said slot at a location above the point of lconnection of'said ears together to block the References Cited in the le of this patent UNITED STATES PATENTS 235,626 Foster Dec. 21, 1880 1,552,274 `Champion Sept. V1, 1925 1,914,878 Begtrup June 20, 1933 2,098,104 Morehouse Nov. 2, 1937

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