US643344A - Draw-knife. - Google Patents

Description

r Patented Feb. I3, |900. I. S. BAILEY.

DRAW KNIFE.

(Application filed June 9, 1899.)

(No Mudel.)

ivrTn STATES PATENT Trice.

ISRAEIIS. BAILEY, OF SOUTHINGTON, CONNECTICUT.

DRAW-KNIFE.

SPECIFICATION forming part of Letters Patent No. 643,344, dated February 13, 1900.

Application filed June 9, 1899. Serial No. 719,998. (No model.)

T0 all whom it may concern:

Be it known that I, ISRAEL S. BAILEY, of Southington, in the county of Hartford and State of Connecticut, have invented a new Improvement in Draw-Knives; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and repesent, in

Figure l, a plan View of a draw-knife constructed in accordance with my invention; Fig. 2, a broken View showing one end 0f the knife and indicating; by broken lines the various positions in which one of the handles may be placed; Fig. 3, a detached broken plan view of the disk at one end of the knife; Fig. 4, a detached sectional view of one of the handles, together with its handle-head and coupler, which is shown in its normal or operating position; Fig. 5, a corresponding view showing the coupler in its retired 0r open position; Fig. 6,a perspective view showing the coupler dismembered; Fig. 7, a detached perspective'view of one of the handleheads. p

My invention relates to an improvement in that class of draw or shaving knives which are provided with adjustable and detachable handles, the object being to provide a simple, compact, strong, effective, and convenient construction.

l/Vith these ends in view my invention consists in certain details of construction and combinations of parts, as will be hereinafter described, and pointedout in the claims.

In carrying out my invention I employ a draw-knife A and two handles B, all of which may be of` any ordinary construction, except as hereinafter specied. Each, end of the knife is formed with a shank C, terminating in a fiat coupling-disk D, formed with a central pivot-hole d and three peripheral notches d', cl2, and d3, the said notches being located at equal distances from each other. Each of the handles is provided with a coupling-head E, having a tang E and formed with two flat circular ears E2 and E3, sufficiently separated from each other to receive one of the disks D of the knife between them, the ear E2 having a central pivot-hole E4 and the ear E3 an alined recess E4 formed in its inner face. Each head is also formed with a push-pin hole E5, extending through it near its base and intersecting the space between the lugs E2 and E4, as clearly shown in Fig. 7, the said push-pin hole being parallel with the pivot-hole E4. These ears E2 and E4 of the handle-heads substantially correspond, at least in diameter, to the disks D of the blade. Each of the said handle-heads is provided with a coupler, consisting of a heavy pivotpin F, a cross-bar E, a push or operating pin F2, a spring F2, and a recessed and threaded retainingcap F4,the push-pin F2 being formed upon its inner face with a clearance-notch f, the inner end of which is by preference l0- cated about in line with the end of the pivotpin F. The outer end of the push-pin is' reduced in diameter' and threaded for the removable attachment of the internally-threaded retaining-cap F4, the inner face of which is Aformed with an annular recess f for the reception of the outer end of the spring, though this is not essential. The said couplers are applied to the handle-heads, as shown in Figs. 4 and 5, so that the push-buttons F will be exposed for convenient manipulation above the upper or outer faces of the heads. Under this arrangement the cross-bars F of the couplers will be located upon the rear or lower faces of the heads, with their pivotpins extending through the pivot-holes E4 of their ears E2, through the spaces between the said ears, and into the recesses E4a formed in the inner faces of the ears E2, while their pushpins will extend upward through the pushpin holes E5 of their heads for the reception of the springs F3 and the retaining-caps F4. The notches f in the push-pins F2 will be 1ocated therein so as to be normally lifted entirely out of alinement with the spaces between the ears, as shown in Fig. 4t, and so that the unbroken inner portions of the pushpins will enter the notches in the periphery of the disks D.

To apply the handles to the blade, the couplers are forced downward against the tension of their springs, as shown in Fig. 5, so as to force the pivot-pins F entirely out of the spaces between the ears of the handle-heads and so as to bring the notches f of the pivotpins into alinement with the said spaces,

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which are now cleared for the introduction into them of the disks of the blade, which disks are entered into the said spaces, so as to register their central pivot-holes D with the pivot-holes D4 of the ears E4, after which the pressure upon the caps F4 is taken off, so as to leave the springs FS free to act and enter' the pivot-pins into the pivot-holes E4 of the lower ears E4 of the disks and to enter the lower ends of the push-pins into peripheral notches of the disks according to the positions of the handles with respect to the knife. To remove the handles, it is only necessary to force the couplers downward, so as to clear their pivot-pins from the said pivot-hole E4 of the disks and so as to clear their pushpins from the said peripheral notches of the disks. To adjust the handles into any of the three positions shown in Fig. 2, it is only necessary to push the couplers into their open positions and then swing the handles through an arc of ninety or one hundred and eighty degrees, so as to bring their push-pins into the notches of the disks for the adjustment desired.

My improved construction, as will be understood from the foregoing description, is very simple, convenient, and durable and avoids slotting the disks at the ends of the blade. My construction, moreover, provides for locking the detachable handles rigidly upon the disks at the ends of the blade through locking-notches formed in the peripheries of the disks, whereby the maximum of rigidity of coupling between the blade and handles is secured, as the farther the locking-points are from the centers of the disks the more advantageous the leverage and the firmer the coupling. By employing peripheral lockingnotches instead of piercing the disk near its center or between its center and its edge for the entrance of locking keys or pins I am enabled to employ larger and heavier' locking instrumentalities, which in my device are the push-pins. Myilnproved handles may, moreover, be very readily detached from the blade, which is a matter of great convenience, because it not only enables one set of handles to be interchangeably used with a set of blades varying in size, but also it enables one handle to be detached while the blade is being passed through an opening, after which the handle is reapplied, thus enabling the drawknife to be used conveniently in situations where it otherwise could not be used if the handles were permanently applied.

I would have it understood that I do not limit myself to the exact construction herein shown and described, but hold myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a draw or shaving knife, the combination with a blade formed at each end with a disk having a central pivot-hole and one or more peripheral locking-notches; ot' two detachable handles, each having a head composed of two ears, and formed with a pushpin hole intersecting the space between the said ears, one of which is formed with a centrally-arranged pivot-hole; and two movable couplers respectively mounted in the said handle-heads, and each comprising a pivotpin, and a slotted push-pin, the said pivotpins entering the pivot-holes of the disks and the pivot-holes of the ears, and the said pushpins entering the push-pin holes of the heads, and the peripheral locking-notches of the disks from which latter the handles are disengaged by moving the couplers so as to clear the pivot-pins from the pivot-holes of the disks, and so as to registerthe slots of the pushpins with the peripheral locking-notches of the disks.

2. In a draw or shaving knife, the combination with a blade formed at each end with a disk having a central pivot-hole, and one or more peripheral locking-notches; of two detachable handles, each having a head composed of two ears,.and formed with a push pinhole intersecting the space between the said ears, one of which is formed with a centrally-arranged pivot-hole; and two movable couplers respectively mounted in the said heads, and each comprising a pivot-pin, a slotted push-pin, a cross-bar uniting the two pins, a spring mounted upon the push-pin, and a cap applied to the push-pin for securing the spring thereto and constituting a push-button, the said pivot-pins entering the pivot-holes ofthe disks and the pivot-holes of the ears, and the said push-pins entering the puslrpin holes of the heads and the peripheral locking-notches of the disks from which latter the handles are disengaged by moving the couplers so as to clear the pivotpins from the pivot-holes of the disks and so as to register the slots of the push-pins with the peripheral locking-notches of the disks.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

ISRAEL S. BAILEY.

Witnesses:

THOMAS F. WELCH,

EMERsoN R. LEwIs.

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