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Publication numberUS2061 A
Publication typeGrant
Publication dateApr 24, 1841
Publication numberUS 2061 A, US 2061A, US-A-2061, US2061 A, US2061A
InventorsJohn M. Van Osdel
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Spring-lancet
US 2061 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

JOHN M. VAN OSDEL,

OF CHICAGO, ILLINOIS.

SPRING-Lancer.

Specification of Letters Patent To aZZ whom t may concern:

Be it known that I, JOHN M. VAN Osman, of the city of Chicago, county of Cook, and State of Illinois, have invented a new and Improved Mode of Making Spring-Lancets; and I do hereby declare that the following is a full and exact description.

The nature of my invention consists in causing the blade of the lancet to react7 so that it is brought instantaneously to its first position-thatis to say, the blade is driven into, and out of the vein, by one motion of vthe spring', the click of the lancet is entirely subdued, by placing a piece of cork or leather for the bolt of the spring tol strike against, after it has performed the required motion.

To enable others skilled in the art. to

' make and use my invention, I will proceed to describe its construction and operation.

l proceed to construct a case, or box of silver, brass, or other metal, of a convenient shape to contain the machinery of the lance I make the cases generally about two inches long, three fourths of an inch wide, and one-quarter of an inch thick; one end of the case is semi-circular, and the other end is sq are; one of the sides of tl e case is fitted in grooves so as to slide olf, (similar to the common spring lancet case). A.. perspective view is shown of this case at A, of the accompanying drawing.

To construct the machinery-a, a, on F ig urcs B and C represent the blade of the lancet, constructed in the ordinary manner; c, c, the thickness of the edge of the case.

(Z, (Z, fZ, is a pin of steel called the bolt.

f f f is a round steel rod, firmly secured to the bolt by being screwed into it, or Welded to it; on the end of the rod f is a small knob, (of similar metal to the case).

rEhe bridle pieces e, e, e, e, are attached to the belt (Z, by the steel pivot at g; the lower bridle piece is attached at h., to the blade a, by a steel screw-the upper bridle is pivoted to the edge of the case at Ze, by means of a steel screw; the construction of the bridle pieces are shown at E, on an en- No. 2,061, dated April 24, 1841.

of the case, and the other end presses against the bolt CZ.

lever is placed on the side of the case (similar to the common lancet). This lever is shoun at j, on Figs'. A and D. A small steel cam is attached to this lever, Which projects inside of the case, and retains the bolt (Z, as shown at Z, Z, on Figs. C, D.y

It Will be observed that a small circular projection is made on the edge of the case as shown at Zr, Zt", ZJ, this admits of the bridle pieces being made considerably longer, which is a great advantage.

Fig. B represents the lancet after it is sprung; the bolt (Z, rests against the cork or leatherl piece at 2'; to set the lancet, take the case in the left hand and then with the thumb and forenger of the right hand, raise the knob on the rod f, and draw the rod outward until the cam Z catches the end of the bolt (Z, as shown on Fig. C, Where the lance is set; then by pressing the thumb on the lever j, t-he cam Z, is Withdrawn, which liberates the bolt CZ, which is instantly carried to the point z' by the pressure of the spring b, and the bridle pieces e, e, carry the lance down, and up, With great force, and a quick motion.

That I claim as my invent-ion and desire to secure by Letters Patentisrlhe giving a reacting motion to the blade of a spring lancet, by the combination of the spiral spring, and the compound cranks, or bridle pieces e, c, as herein set forth; also I claim the method of setting the lance by simply drawing back the rod j', as herein set forth.

JOHN M. VAN OSDEL. .Vitnesses SAMUEL Jonas, JNO. M. DEvoY.

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