US812601A - Pocket-knife. - Google Patents

Description

PATENTED FEB. 13, 1906.

G. SGHRADE.

POCKET KNIFE.

APPLICATION FILED JAN. 7. 1905.

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GEORGE SUHRADE, 0F VVALDEN, NENV YGRK.

POCKET-KNIFE.

Specification of Letters Patent.

Patented Feb. 13, 1906.

Application filed January '7, 1905. Serial No. 239,992.

T0 aZZ whom it 11mg/ concern:

Be it known that I, GEORGE SCHRADE, a citizen of the United States, residing at Walden, in the county of Orange and State of New York, have made certain new and useful yImprovements in Pocket-Knives, of which the following is as ecication.

My invention re ates to pocket-knives in which provision is made for the automatic opening of the blade when released'and for locking the blade both when open and when closed.

The particular construction of knife for which my improvements are designed is described in Letters Patent of the United curing the said spring. Fig. 3 is a longitudinal sectional view taken in the plane in which the blade swings. Fig. 4 is a transverse longitudinal section. Fig. 5 is a sectional vView showing the push-button in its relation with the holdingin and the safety-slide. Fig. 6 is a detache enlarged edge view of the covering plate or Washer used to secure the spring carrying the locking in. Fig. 7 is a detached enlarged view o the safety-slide. Fig. 8 is an enlarged sectional view of the bladespring.

to each other by rivets which pass through them., The sides are usually formed of thin sheets of brass and the back of iron. The mountings or covers B and B may be of pearl, bone, wood, or anyother suitable material. They are riveted or otherwise secured to the linings.

The blades` are re resented by C C and have Shanks c c. T 1e blades are pivotally secured in position between the sides of the casing by a hollow pivot D, riveted to the sides and passin through a hole in the shank. Through the hoow pivot D passes the stem s of apush-button P. The shank c of each blade 1s provided with recesses c and c2, lo-

cated upon opposite sides of the pivot D and adapted to receive a stud e, the recess 'c' to hold the blade open and the other, c2, to hold it closed. The recesses c and c2 are here shown as circular, which shape I` refer; but it is obvious that they may be ova or any desired shape in cross-section.

Thedevice for releasing and holding the knife-blades consists of a plate or bar spring E, secured at one of its ends to the lining of the casing, as hereinafter described, and provided near its opposite end with a stud c, adapted tov project through the-lining of the casing and into one or the other of the recesses c or c2 when the blade is closed or open. The spring E lies on the lining, and its free end projects past the hollow pivot D, so that it formsa rest for the stem s of the push-button P. The stem s is slightly headed to prevent its dropping out of the hollow rivet D. The covering plate or washer w covers the end of the plate-spring E. The rivet r asses through the washer, the spring, and the ining A of the knife, riveting the washer to the lining, and thereby securing the spring in position. The covering plate or washer -w eX- tends pastthe end of the s ring E and is bent down at its end, so it wil not press on the spring E, but rest onthe lining at y. I make this washer o r plate slightly bowed in its length1 as will be seen in Fig. 6, by which construction the washer touches the spring E at the end, where it is turned slightly upward,

gidity which would result from its being riveted to the lining in the usual way. By my improved construction a certain amount of lateral lay is allowed the spring E, which secures t e perfect operation of the stud e in conjunction with the holes c and c2 of the blade-shank. After lcareful experiments I have found this improved construction in.- sures the proper working of the stud e in combination with the holes in the shank of the knife-blade. I preferably form the studs e e conical, so they will t snugly in the holes. When the spring E is rigidly riveted to the lining of the knife, the end pressedl down by the push-button describes a circle and causes the stud e to bind in the holes c and c2.

The actuating-spring F. is arranged to IOO IIO

throw the blades when released from a closed .to an open position.v On the inner face of the back a areforrned two projections b and b',

on which the actuating-spring will rest when secured in position by the rivet f. The free ends of the sprin F bear against the under sides of the shan y(s c c, respectively, of the blade and are slightly turned downward at e Ain order to more fully ride on the shank. The spring F is slightly bent at the center land firmly held in position by the rivet f, passing 'through the linings AA. Where the knife- I room for the push-button to move in. The

face 'of the push-button should be iiush with the outer surface of the knife-cover when the knife-blade is locked and housed in the casing. Heretofore the face of the push-button.

has been smooth, and in conse uence the thumb nail in practice would s ip over it without releasing the blade. In order to obviate this difculty, I provide the face of the push-button with transverse cuts or corrugations in which the thumb-nail will engage. When pressed upon by the finger, the stem s of the push-button will throw the end of the s ring E away from the side of the'lining, and tiiereby withdraw the stud e from the recess in the shank of the blade. v v

L is the slide of the safety-lock and lies in a recess n, made in the cover to receive it. I prefer to Vmake the slide L bowed a little, as

v shown in Fig. 7, lso it will press on the lining and the cover B sufliciently to hold it in position. The rivet 1"', whichfastens the llning to the covering, passes through the oblong hole i in the slide. The end of theslide L next to the push-button is formed into a fork m, so a prong will pass each side of the shank s and under the push-button I?, performing the services of a detent.

The finger-piece k is formed on the slide L and projects through the hole l, cut in the cover B.

When the slide L is pushed forward so the vters Patent, is-

When it is desired, the lock may be used to lock the blade o en.

Having thus escribed my invention, what I claim as new, and desire'to secure by Let-` ,1. In a pocket-knife provided with automatic blade-opening mechanism operated by a push-button, a safety locking device comrlsing a forked detent housed between the lining and covering of the 'knife `and adapted to embrace the Vshank of the push-button under its head,.substantially as shown and described. 2. In a pocketknife,.the blades of which are automatically o ened, substantially as described, a sliding p ate housed between the lining and cover and adapted to engage the push-button land prevent its operation, substantially as shown and described.

` 3. In a pocket-knife, the blades ofwhich are automatically opened, substantially as described,` by a spring carrying a stud adapted to socket in holes in the shank of the blade, means for securing said stud-carrying spring to liningof the knife, comprising a washer formed to rest at end on the lining, and at the other end on the spring and a rivet securing said washer to the ining, said rivet passing through a hole in the spring greater in diameter than the rivet, substantially as shown and described.

4. In a pocket-knife, the bladeof which is automatically opened, substantially as described, a'spring carrying a stud adapted to socket in holes in the shank of the blade, means for .securing said stud-carrying spring to the lining of the knife, whereby the s ring is allowed a lateral play substantial yas shown and described.

5. In a pocket-knife, the blades ofwhich are automatically opened, substantiallyy as described, a blade-opening spring secured at the center by a rivet and resting on contiguous projections formed on the interior of the knife-back.

GEORGE SCHRADE. Witnesses:

WILLIAM FREEMAN, B. C. STICKNEY.

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