US1026065A - Take-down pocket-knife. - Google Patents

Description

G. H. WHITE.

TAKE-DOWN POGKBT KNIFE.

APPLICATION IILED mmzs, 1911.

1,026,065, Patented May 14, 1912.

wi/bmeooao 3140014 oz (WP t attomwq UNITED STATES PATEN T OFFICE.

CARL H. WHITE, OF DENVER, COLORADO, ASSIGNOR TO THE PIOGRAN SALES COMPANY, OF DENVER, COLORADO, A CORPORATION OF COLORADO.

TAKE-DOWN POCKET-KNIFE.

T 0 all whom it may concern:

Be it known that I, CARL H. WHITE, a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Take-Down Pocket- Knives; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the char acters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in take-down pocket knives, my object being to provide a construction in which when the blades are in the open and closed positions, they shall be under tension of the main spring, while when they are in the half-open or intermediate position they shall be relieved of the spring tension, making them easily removable for any reason, as for the purpose of substituting another blade.

This invention is similar to that disclosed in a previous application, Serial No. 57 7 ,285, filed August 15, 1910, allowed F eb ruary 15, 1911. however, involves a novel feature in that a pin is employed for positively relieving the blade of the tension of the spring when the blade is in the intermediate position, the spring, however, acting upon the blade to hold it with sufficient security when in the wide-open and closed positions. In this construction the shank or tang of the blade has three faces, two of which are farther from the pivot than the third face, the latter being the face adjacent the spring when in the half-open or intermediate position; while the other two faces are those respectively engaged by the spring when in the closed and wide-open positions.

An additional feature of my improved construction consists in interposing a spacing sleeve at the extremities of the handle where the blades are pivoted, the object of the said sleeve being to prevent the binding of the blade between the handle arts, incident to the connection of the said parts by means of a fastening screw. In this construction the screw passes through the spacing sleeve and the latter forms the bearin for the knife blade.

it Specification of Letters Patent.

Application filed March 28, 1911.

The present invention,-

Patented May 14:, 1912. Serial No. 617,422.

being shown in section. In this view both blades of the knife are in the wide-open position. Fig. 2 is a similar view with both blades in the half-open or intermediate position. Fig. 3 is a similar view with both blades closed. Fig. 4 is a fragmentary view on a larger scale, showing one blade in two posit-ions, one in full lines and the other in dotted lines. Fig. 5 is a similar view showing the blade in the halfopen position, whereby it is relieved of the springs tension. Figs. 6 and 7 are sections taken on the line 6-7, Fig. 4:, illustrating two forms of construction for the end fastenings of the handle parts.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the parts of the knife handle and 6 a main spring interposed between the handle parts, and secured in place by a centrally located rivet pin 7. The blades 8, which are inserted in the knife handle, have their tangs provided with three faces, designated 9, 10 and 11, the face 9 being nearer the center of the pivot screw 12 than either of the faces 10 and 11. These faces 10 and 11 may be equally distant from the center of the axis of the blade, or approximately so, as may be desired. I11 an event, when the blades are in the half-open position, or in a suitable intermediate position, they are relieved from the spring ten sion by virtue of pins 13 which pass through the two knife handle parts and engage the spring, whereby its extremities are prevented from touching the faces 9 of the knife blade tangs. On the contrary, the faces 10 and 11 are located a sufficient distance from the axes of the blades, that the spring is forced outwardly beyond the pins 13, whereby the blades are held under the necessary tension when in the wide-open and closed positions.

By virtue of my improved construction it becomes practicable to make the main spring of the knife of any desired strength,

since it is held by the pins against engagement with the face 9, but when engaged by the faces 10 and 11 and forced outwardly from the pins, the entire tension of the spring is upon the blades regardless 'of the strength of the spring.

As illustrated in Figs. 6 and 7 of the drawing, two forms of the pivot screw 12 are employed. This screw, however, is surrounded intermediate the handle parts, by a spacing sleeve 15, of sufficient length to prevent the possible binding of the blade between the handle parts, incident to the drawing of the said parts together by means of the screw, whose inner extremity is concealed by reason of the fact that the opening does not extend entirely through both handle parts. This form of construction will be found advantageous where the extremities of the handle parts are composed of metal or other material in which it is practicable to form screw threads. When, however, the extremities of the knife handle parts are composed of so-called pearl or similar brittle or frangible material, it may be preferable to employ the form of construction shown in Fig. 7, in which an opening is made entirely through both handle parts, the extremity of the fastening screw remote from the head being covered by a nut 16, countersunk in the extremity of the handle part, the outer extremity of the nut being closed.

Whichever form of end fastening maybe employed, when it is desired to remove either blade from the handle, it is only necessary to detach the screw, after which the tang of the blade together with the spacing sleeve, is readily removable. In order to substitute another blade it is only necessary to insert the spacing sleeve 15 within the tang opening, insert the tang between the two parts of the handle in such a manner that the opening through the sleeve shall register with the screw openings in the handle parts, and then insert the screw.

Having thus described my invention, what I claim is:

1. In a pocket knife, the combination with a handle having a main spring suitably secured in place, of a blade pivotally connected with the end of the handle and having 0ppositely located side faces and an end face adapted to occupy positions respectively adjacent the end of the spring when the blade is in the wide-open, closed and intermediate positions, the faces of the blade adjacent the spring when the blade is in the wide-open and closed positions being farther from the pivotal center of the blade than the face adjacent the spring when the blade is in the intermediate position, and being respectively engaged by the main spring when the blade is in the said wide open and closed positions, and means acting on the main spring to prevent its engagement with the end face of the blade when the blade is in the intermediate position, and allowing the spring to engage the side faces of the blade when the blade is in the other positions, substantiall as described.

2. A knife composed of a handle, a main spring and a blade pivoted at the extremity of the handle, the pivoted extremity of the blade having three faces which occupy positions respectively adjacent the end of the spring when the blade is in the wide-open, closed and intermediate positions, the faces of the blade which are engaged by the spring when in the wide-open and closed positions being equi-distant from the pivotal center of the blade and farther from the center than the third or end face, and respectively engaged by the main spring when the blade is in the said wide open and closed positions, and means for preventing the spring from engaging the said third or end face of the blade when the blade is in the said intermediate position, substantially as described.

3. A knife provided with a main spring, and a blade whose pivoted extremlty 1s equipped with three faces adapted to occupy positions respectively adjacent the end of the spring when the blade is in the wideopen, closed and intermediate positions, the faces occupying the positions adjacent the spring when the blade is in the wide-open and closed positions being farther from the pivotal center of the blade than the third face of the blade, and respectively engaged by the main spring when the blade is in the said wide-open and closed positions, and means for preventing the spring from engaging the third face of the blade when the latter is in the intermediate position, for the purpose set forth.

4. A knife provided with a main spring and blades whose pivoted extremities are each provided with three faces adapted to occupy posit-ions respectively adjacent the end of the spring when the blade is in the wide-open, closed and intermediate positions, the two faces of each blade which respectively lie adjacent the spring when the blade is in the wide-open and closed positions being farther from the pivotal center of the blade than the third face, and respectively engaged by the main spring when the blades are 1n the wide-open and closed positions, and means for preventing the spring from engaging the third faces of the blades, when the latter are in the intermediate position, substantially as described.

5. A knife composed of a handle, a main spring, and a blade pivoted in the handle, the pivoted extremity of the blade having faces which respectively occupy positions adjacent the spring, when the blade is in the wide-open, closed and intermediate positions, the face adjacent the spring when the located nearer the pivotal center of the blade blade is in the intermediate position being in the intermediate position free from engagement with the spring.

In testimony whereof I aifix my signature in presence of two witnesses.

CARL H. WHITE.

than the other faces the faces adjacent the main spring when the blade is in the wideopen and closed positions being respectively engaged by the main spring when the blade Witnessesi is in the said wide-open and closed positions, 0. H. ROESSNER, and means for maintaining the blade when F. E. BOWEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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