US759845A - Safety-pin. - Google Patents

Description

N0. 759,845. PATENTED MAY 1'7, 1904.

C. ANDRESEN.

SAFETY PIN. APPLIUATION FILED 1mm 16, was.

NO MODEL.

WITNESSES: lNVE/VTUI? lhtirian Patented Illll'ay 2W,

lutllllel, lvlli llltllllll, .tliltlll'lhltllt TU litltllsi I LU'Ulrl, ll llSSQUltl, A UlflltlOltAllUN fio lilfilihlfldllfiiliiltl forming part ct Letters itatent hi0. 759,84l5, dated llltay lfi, 190d. Application filed Decemlier 1S, 1903. herlal lilo. 185,418. lllo modem To all, whom it may concert/1,:

' Be it known that l, tlnius'rmn Azvnnnsnn, a citizen of the United Ebtates, residing at tit. Louis, State-0t Missouri, have invented certain new and useful llniproveinentsin llalety- Pins, of which the following is a full, clear, and exact description, reference being: had to the accompanying drawings; forming a part hereof.

My hivention has relationto improvements in safety-pins; and it consists in the novel construction of pin more fully set forth in'the specification and pointed out in the claim.

lln the drawings, Figure l. is a plan of the pin shown in its locked position. Fig. 2 is a combined plan and longitudinal section of the same. Fig. 3 is a transverse section. on line 3 3 of Fig. 2, and Fig. is a horizontal seetion online 4: 4t of ll i 1.

The object of my invention is to constructa safety-pin in which the piercing member or "prong can he eflectively locked within the sheath or socket by which the point oi. the prong is received; one in which the locking tongue forming an integral part of the stationary member or body portion of the pin shall he disposed in a plane parallel to the line of draft, the maximum dimensions of said tongue being along said line of draft, one in which the dimension of the tongue measured along the wire by which it is carried shall be greater than or equal to the diameter of the cross-section of the wire, thereby reducing to a minimum the danger or possibility of the breaking of the tongue under severe strain, and one possessing further and other ad vantages better apparent from a detailed description of the invention, which :lollows:

Referring totho drawings, 1 represents the stationary member or body portion oi the pin, and 2 the piercing member or prong, the two being connected by means oi the resilient coil 3, which tends to normally force the prone, to an open position, (dotted line, l ig. Li.) Secured at one end of the body portion a sheath 4, having a socket for the receptioitl ol? the point of the piercing member, said sheath being preferably made ot a single piece of l sheet metal and being ol any prevailing form. The wire of the body portion 1 is continued along the inner Wall of the sheath to a point adjacent to the free end of the latter, best shown in Fig. 2. The free end of the continuation ot' the wire 1. within the sheath is flattened. into the form of a terminal tongue 5, adapted to enter or engage the eye 6 in the prong, which eye is located adjacent to the point of said prong. The tongue is disposed with its greatest dimension in the plane of the line of draft to which the prong is usually subjected, so that the pull exerted on the tongue is substantially parallel to such maximum olimension. The dimension here rel'erred to is the measurement of the tongue in a direction conforming to the direction of elongation of the eye 6., it being observed that the eye is a longnarrow slit confined between the bounding elements of the cylindrical walls of the wire constituting the member 2, so that the presence oi? the eye does not materially (if at all) allcet the otherwise uniform cross-sectional character oi the wire in which it is formed, Fig. AS seen from Fig. 52, the base of the tongue, or that portion thereof which merges into the wire 1 proper, when measured in the direction of the line of draft, materially exceeds in dimension the diameter of the cross-section of the wire, this relation being preferred, since under such a construction the tongue better resists the strains to which it is subjected and is not open to the objection. inherent in many constructions well known in the art, in which the end oi? the wire which passes through the eye of the prong is simply do 'llected or bent from the body oi the wire and either liilpl'llijtl down to pass through an eye of normal dii'nensions or allowed to pass with en jlanded beyond the otherwise uniform dimensions-of the prong. The tongue 5, theretore, in the presentinstance, though forming; an integral part of the wire or body portion 1, shaped so that its greatest dimension is lenn'thwise with the pin, its thickness being such that it readily passes into the elongated eye 6 of the prone. The latter is guided into its full thickness through an eyeenlargcd or engagement with the tongue by the walls of the sheath-soeket within which the point of the prong is received.

A tongue of the character here described will resist a maximum strain, since the latter is exerted in a line parallel to its (the tongues) maximum dimension, and a bending of the tongue ispractically impossible, and what is here referred to as a disposition of the tongue in a plane parallel to the line of draft has special reference to the faces or broad sides of said tongue being in such relation, the narrow edges of the tongue being at right angles to such draft-line, Fig. 3, so that a tongue occupying the relation here subsisting is always subjected to a shearing strain rather than to a bending one, and before it can bend it will first shear off the wire of which it forms a part. Thus the advantage of the present construction over devices previously referred to as well known in the art is at once apparent.

Obviously I need not limit myself to the precise details-of construction here shown nor to the number of pieces of which any member of the pin may be formed, as these may be varied according to the skill of the mechanic without in any wise departing from the nature or spirit of my invention. Thus the sheath 4: may be made of two sections. The extension of the member 1 within the sheath i rears-4e need not necessarily form an integral continuation of said member. The coil i) may be replacedby a totally different connection, all as clearly obvious to those skilled in the art.

llaving described my invention, what I claim is- A safety-pin comprising a wire body portion, a piercing member or prong of substantially uniform cross-section connected thereto, a sheath at one end of the body portion for receiving the point of said prong, the latter having an elongated eye located adjacent to the point, and the body portion being extend ed along the wall of the sheath, and a lockingtongue flattened from the wire of the body portion within the sheath and disposed in the plane of the line of draft, and having a basal dimension along the wire in excess of the cross-sectional diameter of the latter for resisting the shearing strain exerted by the prong, the walls of the sheath guiding the prong into engagement with the tongue, substantially as set forth.

in testimony whereof I afl'ix my signature in presence of two witnesses.

CHRISTIAN ANDRESEN.

Witnesses:

EMIL SrAanK, (i. L. BELFRY.

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