US1024086A - Blade-protecting knife. - Google Patents

Description

W. R. LAINE.

vBLADE PROTEGTING KNIFE.

APPLICATION FILED APR. 7, 1911.

1 ,024,086. Patented Apr. 23, 1912. l

UNITED ST TES FAT BLADE-PROTECTING KNIFE.

T 0 all whom t may concern.'

Be it known that I, WALTER R. LAINE, a citizen of the United States, residing in the city of Los Angeles, State of California, have invented a new and useful Blade-Protecting Knife, of which thefollowing is a specification.

An object of this invention is to provide an improved blade-protecting attachment, applicable to knives differing considerably in design, but more particularly adapted for use on knives having double-edged blades of the non-foldable type. This attaclnnent. is adapted to protect the hands of the user and also, when the knife is being sharpened, to guard against the edge of the blade being brought into Contact with the sharpening instrument or surface in an improper manner.

Another' object of this invention is to provide an improved photographers etching tool the blade of which is capable of being adjustably set in a variety of positions with relation to the handles.

Referring to the accompanying drawings, which illustrate the invention, Figure 1 is a side elevation of the knife showing the blade-protecting members in the extended, or operative, position, one of the side plates being broken away to show interior parts more clearly; Fig. 2 is a side elevation of the reverse side of the knife showing the blade-protecting members in the retracted, or inoperative position and also showing the blade adjusted at a different angle; Fig. 3 is a longitudinal mid-section on line ma of Fig. 1; Fig. 4 is an enlarged cross-section, the line of sect-ion being indicated on Fig. 1 by line m4,' Fig. 5 is a side elevation of a blade adapted for use in said knife; Fig. 6 is a perspective view illustrating the use of the blade-protecting arms in sharpening a double-edged blade.

Referring in detail to the drawings, the handle may consist of side plates 1 between which is clamped a spring member 2 by means of two or more rivets 3. Said member 2 has resilient limbs 4 which operate upon the blade-protecting arms 5. Said blade-protecting arms 5 are pivoted one near each edge of the handle, by means of rivets, or pins 6 which also aid in holding together the side plates 1. Said arms 5 are desirably square in cross-section near the pivots 6 and provided with right angles upon which the spring limbs 4 act in the usual manner of Specication of Letters Patent.

Application led April 7, 1911.

Patented Apr. 23, 1912. Serial No. 619,526.

operating blades of pocket knives to hold said arms yieldingly in the extended position, shown in Fig. 1, or in the retracted position, shown in Fig. 2.

As shown in Fig. 4, the arms 5 are each provided with a round portion upon which is mounted a sleeve 7 Said sleeves are rotatable upon said arms and are kept in place by a tip 9 on each arm.

As shown in the first three views, at the left end of the handle side plates l are provided with narrowed end portions 11 which are brought together as seen in Fig. 3 to hold a blade 12 by means of a screw 13 and nut 14. Said blade 12 (see Fig. 5) has a shank 15 furnished with an open slot 16 whereby the shank of the blade may be made to pass astride the retaining screw 13. B loosening' the nut 14 (or screw 13) the blade 12 may be adjusted to various angles as indicated in Fig. 2. The head of screw 13 may be soldered to the side plate extension 11 at that side of the knife and the adjustment effected by the nut 14 only. A variety of blades may be employed if they are all provided with similar shanks. f

In Fig. 6 is illustrated the use of the bladeprotecting arm in sharpening a doubleedged blade. In thus using the knife the arm rests upon the strop and the blade and handle are moved in the same manner as in sharpening an ordinary razor. The sleeve 7 protects the other edge of the blade from cutting the strop 19. Said sleeve also rot-ates and lessens friction. In order to perform the function of protecting the edges of the blade during sharpening, it is necessary that these blade protecting arms be located close to, parallel with, and in substantially the same plane with the blade of the knife.

The side plates are recessed at 21 to permit the fingers to grasp the arms 5 to extend the latter.

The herein described knife is well suited to the use of photographers for an etching tool. The blade being comparatively thin and sharpened at both edges, there is nothing to obscure the vision of the operator from the surface upon which he is operating.

I claim:

1. In a knife, a handle consisting of a member having resilient limbs and a pair of side plates covering said limbs, said plates having side portions extending laterally beyond said limbs, a double-edged blade attached to one end of said handle, and a pair of blade-protecting arms pivoted to and between the edge portions of said plates, each of said arms having a heel portion in engagement with one of said resilient limbs to hold said arm yieldingly in a blade-proteelt-ing position or in a completely retracted position.

2. In a knife, a pair of side plates, an elongated spring member having a solid portion secured between one end of said side plates and a pair of spring limbs projecting toward the other end of said side plates, said side plates extending laterally beyond said limbsj a blade attached to the end of the knife toward which said limbs extend, and a pair of pivoted blade-proteeting arms, said arms having heel portions upon which said limbs operate to hold said arms yieldingly extended along the edges of the blade adapted to swing into position parallel to' said blade to protect an edge thereof, and a rotatable sleeve carried by said arm, said sleeve being adapted to operate as an antifriction device in sharpening the knife.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses at Los Angeles, in the county of Los Angeles and State of California, this 29th day of March 1911.

VALTER It. LAINE.

Vitnesses ALBERT H. MERRILL, LILLIAN YOUNG.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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