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Publication numberUS598896 A
Publication typeGrant
Publication dateFeb 15, 1898
Filing dateAug 30, 1897
Priority dateAug 30, 1897
Publication numberUS 598896 A, US 598896A, US-A-598896, US598896 A, US598896A
InventorsAndrew Berglund
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 598896 A
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Description  (OCR text may contain errors)

(No Model.)


No. 598,896. Patented-Feb. 15, 1898.

anls PETERS co. momunfiwisumn'ron, o. a




SPECIFICATION forming part of Letters IIPatent No. 598,896, dated February 15, 1898.

Application filed August 30, 1897. SerialNo. 649,912. (No model.) I

To all whmn it may concern:

Be it known that I, ANDREW BERGLUND, a citizen of the United States, residing at Man'- istee, in the county of Manistee and State of Michigan, have invented certain new and useful Improvements in Pocket-Knives, of which the following is a specification.

This invention relates to certain improvements in pocket-knives of that class in which the blades are pivotally secured in the end or ends of the handle and are locked in a closed or open position by means of a suitable spring-actuated locking device; and it consists in certain peculiarities of the construction, novel arrangement, and operation of the various parts thereof, as will be hereinafter more fully set forth and specifically claimed.

The objects of my invention are, first, to provide a pocket-knife which shall be simple and inexpensive in construction, strong, durable, effective, and satisfactoryin operation and use, and, second, such a knife in which by reason of the peculiar construction and operation of its parts the blades thereof will be held or locked in a closed or opened posi tion, thus preventing the blades opening while the knife is being carried in the pocket and preventing them closing on the hand when opened and in use.

In order to enable others skilled in the art to which my invention pertains to make and use the same, I will now proceed to describe it, referring to the accompanying drawings, in which Figure 1 isaplan or edge view of a knife embodying my invention, showing the blades thereof closed. Fig. 2 is a longitudinal view, partly in section and partly in elevation, taken on line 2 2 of Fig. 1 in the direction indicated by the arrows and showing the mechanism for locking one of the blades. Fig. 3 is an inner view in elevation of one side or section of the knife-handle. Fig. 4 is a detached plan view of the locking bar or rod for one of the blades. Fig. 5 is a fragmental View in elevation of a portion of one of the blades, showing the construction of its tang. Fig. 6 is a plan or edge View of a knife, showing a modification in the construction thereof. Fig. 7 is a longitudinal View, partly in sect-ion and partly in elevation, taken on line 7 7 of Fig. 6 in the direction indicated by the arrows, illustrating the construction of the modified locking-bar; and Fig. Sis a detached plan view of one of the modified locking-bars.

Similar letters refer to like parts throughout the different views of the drawings.

A represents the sides or pieces constituting the handle of the knife, which may be made of any suitable size, form, and material,

and may be secured together by means of rivets a or in any other suitable manner. Each of the sides or pieces A, when the knife is constructed with two blades, is formed on its inner surface with a longitudinal groove a, extending from near thatend of the piece to which the tang of the blade Bis pivoted to and through the opposite end, the said groove being formed with an enlargement a, extending'from its open end inwardly for the reception and operation of the enlargement b on the locking-bar B, which lies in the groove a and engages the blade, as will be presently explained. The inner surface of each of the pieces A (when two blades are j used) is provided with a circular boss 0,

through which the groove 0. extends diametrically, as is clearly shown in Fig. 3 of the drawings. The tang b of the blade or blades B is formed with a circular opening 0, of a suitable size to receive the boss 0 on the side or piece of the handle, and said opening 0 is provided with recesses c and 0 located diametrically opposite eachother' and longitudinally in respect to the blade. Within the groove (1. and enlargement a thereof is located and operates the locking-bar B, which, as is clearly shown in Fig. 4 of the drawings, is formed or provided at one of its endswith an enlargement b and at its other end with an enlargement 5 which latter enlargement is of a length about equal to the slot or open- .ing 0 in the boss 0 on the side orpiece of the knife-handle, and when located in said slot is about flush with the surface of said boss. Around the bar B and within the enlargement at is a spring 12 one end of which rests against the enlargement b of the locking-bar and the other end against the contracted portion of the enlargement a, as shown in Fig. 2 of the drawings. This spring normally holds the locking-bar in the position shown in the last-named figure, but when the enlargement I) is forced inwardly by pressure the said spring will yield su'fficiently to allow the enlargement b to be moved out of the recess to allow the blade to be turned on the boss 0, which constitutes its pivot.

In Figs. 6 to 8, inclusive, of the drawings 1 have shown a modification in the construction of my knife which I may sometimes employ, and which consists in using a lockingbar B having on one of its ends an enlargement 6 to fit within the slot of the boss 0 and to engage the recesses c and c of the circular opening in the tang of the blade. In this modification the blade or blades are constructed as above set forth, but the sides A of the handle are each formed on their inner surfaces (when two blades are used) with grooves 6, having a recess 6 near the butt of the handle, but not extending therethrough, as in the first-described construction.

As shown in Fig. 8 of the drawings, the locking-bar B is provided with a buttonheaded projection (Z, which extends through a slot (1 in the side of the handle and is employed instead of the enlargementb for moving the bar or bolt B when it is desired to release its enlargement b from the blade. The bar or bolt B is also provided with an enlargement or projection d against which one end of the spring e located within the recess e, rests, the other end of which spring rests against the contracted portion of said recess, as is clearly shown in Fig. 7 of the drawings.

IVhile I have shown the knife constructed with two blades, yet it is apparent that I may employ one blade only, in which event it will be necessary to provide one side only of the handle with a groove, and one locking-bar only will be required. I may sometimes use a locking-bar constructed and adapted to be operated as shown in Fig. 2 of the drawings for one of the blades, and a locking-bar constructed and adapted to be operated as shown in Fig. 7 of the drawings for the other blade withoutdeparting from the spirit of my invention.

The operation of my knife is simple and as follows: When the construction illustrated in Figs. 1 to 6, inclusive, is employed, the blade or blades of the knife may be opened by applying pressure to the enlargement b 0n the locking-bar B, which will force the enlargement b out of engagement with the recess c and allow the blade to be turned or opened,when by removing the pressure from the enlargement Z) the spring 11 will retract the locking-bar and cause the enlargement b to engage the recess 0 in the tang of the blade and lock or secure it in an opened position. When the construction illustrated in Figs. 6 to 8, inclusive, is employed, the enlargement b on the locking-bar B may be disengaged from the recesses c and c by forcing the locking-bar toward the butt of the handle by means of the button-head d,which extends through the side or sides of the handle, as above set forth.

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

The combination with the side piece of the handle of a pocket-knife, having on its inner surface the groove or, provided with the enlargement a, of the circular boss 0, having the slot 0 secured on the side piece at the end of the groove therein, the blade B, having the circular opening 0, to receive the boss, and the recesses c, and 0 the lockingbar B, having the projection 19 to fit within the slot of the boss and to engage the recesses c, and c of the blade, and the enlargement

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2467270 *Jun 16, 1944Apr 12, 1949William Patchett GeorgeFolding bayonet for firearms
US4166619 *Mar 3, 1977Sep 4, 1979Bergmann Bruce ASequential function hunting arrows
US5095624 *Dec 7, 1990Mar 17, 1992Ennis Raynold WLock system for a folding knife
US5111581 *Nov 6, 1991May 12, 1992Collins Walter WBolt operated locking mechanism for folding knife
US7059053 *Dec 27, 2002Jun 13, 2006Kimi SakaiFolding knife with blade lock
US20110239467 *Apr 4, 2010Oct 6, 2011Chin-Chung ChuanDesktop Cigar Cutter
Cooperative ClassificationB26B1/048, B26B1/046
European ClassificationB26B1/04D