US1400378A - Shears - Google Patents

Description

E. C. ROYER.

SHEARS. APPLICATION FILED MAR. 16, 1920.

,400,378. Patented Dec. 13, 1921.

2 SHEETS-SHEET I.

Edu/:in Cppar Wil/Lumen UNITED STATES PATENT FFC.

SHEARS.

Specification of Letters Eat-ent.

Patented Dec. 13, 1921.

Application filed March 16, 1920. Serial No. 366,279.

To all whom t may concern:

Be it known that I, EDWIN C. ROYER, a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented certain new and useful Improvements in Shears, of which the following is a specification.

One object of my invention is to provide an improved shear which will be particularly adapted for cutting sheet metal and which can be easily manipulated by hand either by a right handed or left handed Workman.

Another object is to provide an improved shear whereby the Workman can manipulate the same at a position adjacent the cutting point so that the workman can closely watch the work as it is being cut and at the same time will not be compelled to stretch his arms to such extent as would interfere with manipulation of the work being cut.

A. further object is to provide my iniproved shear with a readily removable ac tuating pawl so that the same can be replaced or repaired, or changed in its position to suit a right handed or left handed workman.

A further object is to make my invention of a simple and durable construction and so that it can be easily manufactured.

These objects, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference being had to the accompanying drawings in which Figure 1 is a side elevation of my improved shear,

Fig. 2 is a top plan view of Fig. 1,

Fig. 3 is an elevation of the operating end of my improved shear showing in full and dot-and-dash lines two positions which a hand-lever 4can assume when operated by right handed and left handed workmen,

Fig. 4 is a fragmentary elevation, partly l in section, and drawn on an `enlarged scale showing the various parts of my improved shear,

Fig. 5 is a fragmentary cross section taken on the line 5-5 of Fig. 4:,

Fig. 6 is a fragmentary elevation looking in the direction of the arrow m in Fig. 4, and F ig. 7 is a rear view of lever and pawl construction showing the gate of the lever having been moved into a position to permit ready access to the pawl for the purpose of replacing or changing the position of said pawl.

Referring to the drawing, 8 represents a head having a base arm 9 and an upper arm` 1Q spaced apart; said head having feet provided by lugs 11 whereby it can be secured by bolts to a bench or other supporting structure. The upper arm and base arm are spaced apart so as to provide space for sheet material or the like being cut. The upper arni has three stud bolts 12, 13 and 14 screwed into its outer free end 15 g the lowermost stud bolt 14; having a pinion 16 pivoted thereon and at a position in front of said pinion has a cutting wheel 17 pivoted thereon and secured to said pinion. The cutting wheel 17 is adapted to co-act with a cutting wheel 18 pivotally mounted on the end of a stud bolt 19 adjustably secured in a lip 2O which projects upwardly from the base arm 9. The intermediate stud bolt 13 forms a pivot for an intermediate .gear wheel 21 which has teeth which mesh with the teeth of the pinion 16. The stud bolt 12 forms a pivotal support for the actuating gear wheel 22 which meshes with the intermediate gear wheel 21.

A hand-lever 23 at its bottom is pivoted on the stud bolt 12 in front of the gear' wheel Y 22. The lever 2S has a cavity 24 at its rear position above the top of the upper arm 10 and the rear portion of this cavity is adapted to be closed by a gate 25 which is pivotally mounted on a pivot pin 26 andiis provided with a clamping screw 27 for securing the gate in its closed position as shown in Fig. 6. This gate may be swung so as to expose the rear part of the cavity 24, as shown in Fig. 7, and this can be done by loosening the clamping screw 27 and swinging the gate on the pivot pin 26.

fr pawl 28 is normally slidable within the recess 24e in the direction of 'the length of the lever' 23; said pawl being backed by a coiled spring 29 within said recess. The lower end of the pawl 28 is beveled on one side, as shown at 30, and said lower end 'is adapted to mesh with the teeth of the gear wheel 22 so that .when the lever 23 is swung in one direction on the stud bolt 12 as a pivot, the pawl will rotate the gear wheel 22 to the extent of swinging movement of the lever 23; said pawl having an abrupt surface 31 so that when moving in the direction in which said surface faces,

the gear wheel 22 will be partially rotated as above described When the lever 23 is swung in an opposite direction the beveled moved from the recess 24 by swinging the gate 25 into the position shown in Fig. 7. The pawl can then be removed and reversed to change the position of the beveled sur- Jface and the gear wheel 22 will be rotated when the'hand-lever is moved in said latter direction. However, the gear wheel 22 will not be moved when the hand-lever is swung in said I'irstjdirection. It will be noted that the movement thus imparted to the gear wheel 22 will be imparted to the pinion 16 through the medium of the intermediate wheel 21 and the cutting wheel will be rotated so that any material which is inserted between the cutting wheels 17 and 18 will be cut due to the action of the handlever as above described.

While I have described my invention as taking a particular form, it will be Vunderstood that the various parts of my invention may be changed without departing from the spirit thereof, and hence I do not limit myself to the precise construction set forth; but consider that I am at liberty to make such changes and alterations as fairly come within theu scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters PatentV is LA shear including a head; a pinion rotatably secured to the end of said head; a cutting wheel connectedV directly in front of and to the pinion; a gear wheel in mesh with said pinion and rotatable in the plane of said pinion and supported by said end ofthe head; a swinging hand lever positioned in front of said end of the head; and a pawl carried by said hand lever and having a portion adapted to mesh with the the pinion; a gear wheel in mesh with said pinion androtatable tovetfect movement ot K said pinion; a swinging hand-lever having a recess; a pawl slidably mounted within said recess;` said pawl having a portion adapted to mesh with the teeth of said gear wheel during the movement ot' the handlever in one direction to effect rotation ot said gear wheel, said pawl having a portion adapted to effect disengagement with said gear wheel during the movement of the handdever inv an opposite direction; and a gate for closing the side of said recess, said gate being readily removable to permit the pawl to be moved sidewise out of said recess and reversed to effect rotation of said gear wheel when the hand-lever is swung in said latter direction and to cause disengagement of said pawl from the gear wheel when the hand-lever is swung in said first direction; substantially as described.

3. A shear including a head having an upper and a base arm spaced apart and having free ends; a pinion rotatably secured to the free end of said upper arm; a cutting wheel rotatable in conjunction with the pinion; a gear wheel rotatably Vconnected to said end of the `upper arm and in mesh with said pinion to effect movement of said pinion: a swinging hand-lever pivotally mounted concentric to the axis of said gear wheel and movable in a plane in substantial alinement with the plane of rotation of said cutting wheel; and a pawl carried by said lever for 'engagement with the teeth of said gear wheel; substantially as described. In testimony whereof I have signed my name to this specification in the'presence of two subscribing witnesses.

EDWIN C. ROYER.

Witnesses: l

ANNA BENTON, CHAs. E. Poms.

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