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Publication numberUS773568 A
Publication typeGrant
Publication dateNov 1, 1904
Filing dateFeb 8, 1904
Priority dateFeb 8, 1904
Publication numberUS 773568 A, US 773568A, US-A-773568, US773568 A, US773568A
InventorsHarry A Heineman
Original AssigneeHarry A Heineman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 773568 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No. 773,568. PATENTED NOV. 1, 1904. H. A. HEINEMAN.




wi l? woes m'uemtoz 6&1 ry A. Heineman v I @3317 mom wi e g g fzaw UNITED STATES Fatented November 1, 1904:.



SPECIFICATION forming part of Letters Patent No. 773,568, dated November 1, 1904.

Application filed February 8, 1,904. Serial No. 192.483- (No model.)

To all whom it may concern/.-

Be it known that I, HARRY A. HEINEMAN, a citizen of the United States, residing at the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Safety-Pins, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to safety-pins, and more particularly to means for preventing the accidental disengagement of the pin-point from the shield.

In safety-pins as now constructed the point is liable to become accidentally disengaged from the shield in two ways. First, the loop or coil which holds the pin-point in position in the shield is liable to become weakened, so that the pin-point moves laterally out of the guard very easily; second, if considerable strain is brought to bear upon the pin-point it is liable to bend in its central portion, so that it pulls out of the shield longitudinally.

The object of my invention is to overcome both of these difiiculties.

My invention consists in certain novel features and details of construction, all of which are described in the following specification and pointed out in the claims.

In the accompanying drawings, which illustrate some forms of safety-pin made in accordance with my invention, Figure l is a side view. Fig. 2 is an enlarged section on the line 2 2 of Fig. 1. Fig. 3 is an edge view, partly in section. Fig. 4 is a side view showing a slight modification. Fig. 5 is an enlarged section on the line 5 5 of Fig. 4, and Fig. 6 is an enlarged view of the pin-point shown in Figs. 4 and 5.

Like marks of reference refer to similar parts in the several views of the drawings.

10 is the member of the pin which is rigidly secured to the shield 11, and 12 is the pin-point, which is adapted to be engaged with and disengaged from the shield 11.

14 is the loop or coil, the spring of which holds the pin-point 12 in position in the shield.

shoulder to engage with the forward square end of the recess 16 in the pin-point. The detent 15 should be forced in such a distance that at its nearest point to the opposite side of the shield the distance will be somewhat less than the thickness of the pin-point, so that when the pin-point is placed in position it willv require some pressure to force it fully into position, and consequently it will require a like pressure to disengage it laterally from the shield even if the coil or loop 14: should become considerably weakened. In this way I prevent the accidental disengagement of the pin-point laterally from the shield. It will be evident that the engagement of the forward square corner of the recess 16 with the square shoulder of the detent will positively lock the pin against longitudinal movement out of the shield. In Figs. 1 to 3 the pin-point is only adapted to enter and leave the shield at one side, and consequently only one recess is formed in the pin-point and only one detent in the shield. In the modification shown in Figs. 4, 5, and 6 I have shown a form of pin in which the pin-point is adapted to enter at either side of the shield.- In this form of pin there is usually a movable separatingblade 13 for preventing the pin-point from passing from one side of the shield to the other. In this construction I form two recesses 16 in the pin, one at each side, and also two detents 15 in the shield.

Having fully described my invention what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. In a safety-pin, the combination with a pin-point provided with a recess having aforward square end, of a sheet-metal shield, and a sharp locking-shoulder formed by the edge of an intruding portion of said shield andcooperating with the forward square end of the recess in said pin-point to positively lock said pin-point having a pair of recesses, of a shield I 5 having a pair of detents for engaging with said recesses to lock said pin-point, and a separating member arranged in said shield between said detent for holding said pin-point out of engagement with one detent while it 2 is in engagement with the other.

In testimony whereof I have hereunto set my hand and affixed my seal in the presence of the two subscribing witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4030166 *Dec 5, 1975Jun 21, 1977Betters Paul DSafety pin
Cooperative ClassificationA44B9/14