US1892877A - Scissors - Google Patents

Description

c. DRIEST SCISSORS Jan. 3, 1933.

Filed June 3, 1951 INVEN TOR.

A T TORN Patented Jan. 3, 1933 PATENT OFFICE- CHARLES DRIEST, OF MARLBORO, NEW JERSEY V SCISSORS Application filed June 3, 1931. Serial No. 541,751.

This invention relates to scissors, shears and similar devices; and the object of the invention is to provide a device of the class described consisting of a main body portion composed of two pivot-ally coupled handle members with projecting aws or shank portions, with means for detachably supporting blade members in connection with the jaw or shank portions of the tool; a further object being to provide blademembers for tools of the class specified fashioned from strips of tool steel of the same-thickness throughout, tacilitating their mounting in straight or parallel walled grooves in the shank or jaw portion of the tool, and to the provision of means on the pintle end portions of the blade members engaging the free end of the jaw members to support the blade members against movement with respect to the jaw 26 members, and further to the use of set screws adjacent the pivoted ends of the jaw members, engaging said blade members for a similar purpose; a further object being to provide a tool of the class described, the pointed end portions of the blade members of-which proj ect beyond the jaw or shank portions of the tool, and to ofisetting said projecting ends laterally to arrange said ends in crossed relation to each other when the tool is in a partially or fully opened position, permitting the proper functioning of the tool to the extreme tip ends of the blade members thereof; and with these and other objects in view, the invention consists in a device of the class and for the purposes specified, which is simple in construction, efficient in use, and which is constructed as hereinafter described and claimed.

The invention is fully disclosed in the fol- 49 lowing specification, of which the accompanying drawing forms'a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which i Fig. 1 is a side view of one form of tool made according to my invention.

Fig. 2 is a side edge view of the structure as shown in Fig.1. 1 Fig. 8 is an enlarged, detail View of the jaw end of the tool with the jaws in closed position, with part of the construction broken away.

Fig. l is a section on the line 44 of Fig. 3; and

- Fig. 5 is a detail view of one of the blade members which I employ.

It will be understood that my invention is adaptable for use in connection with shears or scissors of various kinds and classes, and in fact to any tools of this class, of various designs, and used for various purposes.

For the purpose of illustrating one of the many uses and adaptations of my invention, 1 have shown in the accompanying drawing what is known as a barber's shears consisting of handle members 10 and'll pivotally coupled as seen at 12. The member 10 includes a projecting curved finger piece 13, extending from its looped end 14, and the member 11 terminates in a finger loop 15. The loop 14 also includes an adjustment screw 16, limiting the movement of the loop 15 with respect to the loop 14. The screw 16 is adapted to regulate the operation of the blade members of the tool with respect to each other.

Extending from the handle member 10 is a aw or shank portion 17 and a similar aw or shank portion 18 extends from'the member 11. In the construction shown, these jaws are gradually tapered to their outer ends, and. the inner adjacent edges thereof are milled longitudinally to form blade receiving grooves 19, the opposed walls of which are straight so as to receive blades 20 formed from strips of material, opposed side faces of which are parallel. to fit snugly in the grooves 19 of the jaws 17 and 18, the free ends of the jaws 17 and 18 tapering to surfaces which are substantially flush with the side surfaces of'th-e blades 20 when mounted therein, and the grooves 19 open outwardly through said ends.

The back wall of the groves 19 in the separate jaws. is recessed as seen 21, note Fig. 3 of the drawing. to receive a barb or hook-shaped projection 22 formed on the b ade 20. The projection 22 prevents the displacement or lateral. movement of the blade with respect tothe jaw of the tool especially at the forward end thereof. The free ends of the blade are held in position by set screws 23 passed through the jaws 17 and 18 adjacent the pivot 12 as clearly seen in Figs. 1 and 3 of the drawing. The exposed side edge of the blades 20 when mounted in the jaws l7 and 18 are beveled and ground to form cutting edges 24, as will be apparent. The outer end portions of the blades terminate in points by the inclined wall 26 thereon, which forms a continuation of the back edges 17a and 18a of the jaws 17 and 18 as clearly seen in Figs. 1 and 3.

It will also be noted, on a consideration of 2 of the drawing, that the end portions 25 are offset laterally in the direction of the opposed blade or jaw members, so that when the tool is in a partially open position as seen in Fig. 1, said ends of the blade are in crossed relation as clearly illustrated at 27, in Fig.2 of the drawing.

Thus, it will be seen that as the scissors is moved into closed position, the crossed ends 25 will flex from each other, facilitating the successful operation of the shears to the tip end of the blades thereof. The fiexure of the blades outwardly of the shanks 17 and 18 in no way effects the mounting of the la des in connection with said shanks, as will be apparent.

In removing the blades from the jaws 17 and 18, the screws 23 are loosened. and the blades are pulled outwardly in the longitudinal plane of the jaws. It is understood, however, that after disengaging the projection 22 from the jaws, the blades may be removed laterally therefrom.

It will be noted that the grooves 19 are arranged angularly in the jaws 17 and 18: with respect to the inner adjacent surfaces thereof. so that the cutting edges 24 of the blades will project beyond such surfaces, thus providing the desirable clearance between the inner surfaces of the jaw members in the operation of the shears.

As heretofore stated, my invention is applicable to shears. scissors and like tools and various kinds and classes. and while I have shown certain details of construction for carrying my invention into effect. it will be understood that I am not necessarily limited to these details, and various changes in and modifications of the construction herein shown and described may be made within the scope of the appended claims without departing from the spirit of my invention or sacrificing its advantages.

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

l. A tool of the class described comprising pivotally coupled handle members, jaw members extending from the pivot of the handle members, cutter blades detachably coupled with said jaw members, the jaw members having grooves arranged longitudinally thereof, opposed walls of said grooves being parallel, said blades being formed from strips of sheet metal of the same width and thickness throughout the major portion of their length to provide relatively straight cutting edges, and backing walls substantially parallel to said cutting edges, said blades fitting snugly in said grooves with approximately one half of the blades projecting beyond the side edges of said jaw members to provide lateral spring flexing of the blades with respect to each other in the use of the shears, and means for retaining the blades against displacement from the aw members and the grooves thereof.

2. A tool of the class described comprising pivotally coupled handle members, jaw members extending from the pivot of the handle members, cutter blades detachably coupled with said aw members, the jaw members having grooves arranged longitudinally thereof, opposed walls of said grooves being parallel, said blades being formed from strips of sheet metal of the same width and thickness throughout the major portion of their length to provide relatively straight cutting edges and backing walls substantially parallel to said cutting edges, said blades fitting snugly in said grooves with approximately one half of the blades projecting beyond the side edges of said jaw members to provide lateral spring flexing of the blades with respect to each other in the use of the shears, means for retaining the blades agianst displacement from the jaw members and the grooves thereof, said means comprising a projecting member on each side adjacent the free end thereof engaging a corresponding end of the jaw member and a member engaging the inner end of each of said blades and the free ends of said blades projecting beyond the jaw members, said ends being offset laterally with respect to the longitiudinal plane of the adjacent surfaces of said j aw members.

3. A blade for tools of the class described, said blade being formed from an alongated strip of sheet metal of the same width and thickness throughout the major portion of its length to provide a relatively straight cutting edge and a backing edge substantially paralel to the cutting edge, and backing edge being provided adjacent the free end of the blade with a projecting part for retaining the blade against displacement from its support, the end of the blade beyond said projecting part being pointed and said pointed end being offset laterally with respect to the inner surface of the blade.

In testimony that I claim the foregoing as my invention I have signed my name this 1st day of June 1931.

CHARLES DRIEST.

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