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Publication numberUS462141 A
Publication typeGrant
Publication dateOct 27, 1891
Filing dateMar 3, 1891
Publication numberUS 462141 A, US 462141A, US-A-462141, US462141 A, US462141A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 462141 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)



N0. 462,141. Patented Oct. 27, 1891,

/NVENTOR THNEYS proved Clasp-Knife,of which the following is UNITED STATES PATENT OFFICE.



SPECIFICATION forming part of Letters Patent No. 462,141,'dated October 27', 1891. Application filed Maroh'S, 1891. Serial Nh. 383,592. (No model.)

To all whom t may concern,.-

Be it known that I, RUDOLPH C. KRUSCHKE, ot Duluth, in the county of St. Louis and State of Minnesota, have invented a new and Inia full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming a part of this specification, inwhich similar letters of reference indicate corresponding parts in all the figures.

Figure lis a perspective view of my iniproved claspknife- Fig. 2 is a sectional side elevation with one side of the handle removed, the blade being open. Fig. 3 is a sectional side elevation with the opposite side of the handle removed, the blade being open. Fig. 4 is a sectional side elevation with one side of the handle removed, showing theblade closed. Fig. 5 is a transverse section taken on the line a: a: in Fig. 4c. Fig. 6 isan enlarged transverse section taken on line y y in Fig. 3. Fig. 7 is a longitudinal section of the knit'e taken in the plane parallel vwith the pivot ot' the blade. Fig. 8 is a perspective view of the bladereleasing lever, and Fig. 9 is a perspective view of the spring. My invention is an improvement in the class of clasp-knives whose blades may be released by the hand holding the knives and will then be automatically thrown out into the open position by means of a spring.

The improvement consists in the special construction and arrangement of parts, as hereinafter set forth.

The handle A is formed of the side pieces B B and the forked spring C, the side pieces being secured in place by rivets passing through the side pieces and the spring in the usual way. The blade D is pivoted on a rivet d, extending transversely through the handle, and upon opposite edges of the pivoted end of the blade are formed the lugs b h', which are located on diametrically opposite sides of the pivotal rivet a.. Thefree end of the spring C is split, forming two arms c d. The arm c extends along the back of the handle and is furnished with a T-shaped end e, which reaches laterally across the handle :near the end and rests normally in notches formed in the edges of the nuts at the end of the handle.

The T-shaped ende of the spring C is provided with an aperturefto receive either of the lugs b b. The arm d of the spring C curves inwardly and bears upon the shoulder g on the blade D, tending-to throw the blade open. B is formed a recess i, in which is pivoted a right-`angled lever j, the shorter arm of which is bent inwardly toward the center of the handle and furnished with a lug It', projecting toward the arm cof the spring C. Thelonger arm of the lever j is jointed to a bar Z, which lies in the recesst' and is provided with a stud m, which projects through a slot in the metal lining h and enters a hole in one end of' the bar n on the outside'of the lining and within the cheek-piece o ot1 the handle. The other end of the bar n is connected by a stud eX- tending outwardly through a slot in the cheekpiece 0, with a sliding plate p insertedI in a recess in the outer side of the cheek-piece o. The sliding plate p is ribbed on its outer surface for engagement by the thumb or finger. The knife being closed, as shown in Figs. l and 4, and the arm d of the spring C being under compression, when the sliding plate p is moved toward the butt of the handle, the

In the metal lining 71. of the side piece lever j is tilted, the arm c of the spring C is i pushed outwardly and the lug b is released, and the spring-arm g throws the blade outward with sufiicient force to cause it to open wide and thus bring` the lug h opposite the hole ein the spring-arm c, when the lug is engaged by the spring and the blade is securely held in an open position.

Vhen it is desired to close the knife, the

sliding plate p is again moved in the same direction as before, thus tilting the lever] and releasing the lug b, when the blade may be closed.

My improved knife is designed for the use` IOO right-angular leverj, pivoted at its angle near the rear end of the blade and adapted to engage said spring for releasing the blade, and

means for Operating the lever, substantially as 5 shown and described.

2. In a clasp-knife, the combination Of the handle A, the blade D,pivoted in Jche handle and furnished with lugs O b', the spring C, having the T- headed perforated arm c, adapted to engage the lugs b Z2 and armd for ro throwing-.the blade Open, the angled releasing-lever j, rods Z n, and slidepsubstantially as specified.



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US9061426Jun 6, 2013Jun 23, 2015Milwaukee Electric Tool CorporationKnife
US9352473Jun 4, 2015May 31, 2016Milwaukee Electric Tool CorporationKnife
USD703509Feb 27, 2013Apr 29, 2014Milwaukee Electric Tool CorporationUtility knife
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Cooperative ClassificationB26B1/046