US 837590 A
Description (OCR text may contain errors)
T. SMITH. 'sorssons.
APPLICATION FILED JUNE 25, 1906.
PATENTED DEC. 4, 1906.
MARCELLOUS TO'WNSAND SMITH, OF NORTHPORT, NEW YORK.
Specification of Letters Patent.
Patented Dec. 4, 1906.
Application filed June 25,1906. Serial No. 323,326.
To all whom it may concern:
Be it known that I, MARoELLoUs TOWN- SAND SMITH, a citizen of the United States, residing at Northport, in the county of Suffolk and State of New York, have invented certain new and useful Improvements in Scissors, of which the following is a specification.
This invention relates to scissors and shears, and particularly to means for effect ing a cushion or spring bearing between the blades of scissors, shears, and similar cutting implements.
The object of the invention is to provide a spring interposed between the blades of scissors and shears in such position as to throw the cutting edge of the blades against each other throughout their length during the working of the blades and to take up lost motion or looseness at the pivot-joint, whereby the usual adjustment of the joint and frequent grinding of the blades is obviated.
I accomplish the above-mentioned and other improved results by housing a spring in one of the scissors-blades at the rear of or behind the pivotscrew, so that the spring may have an e ual bearing on each blade and incline the latter so that their edges have a shearing contact during the working of the scissors.
It is a well-known practice with tailors and other users of scissors to overcome the looseness or lost motion at the pivot by handpressure in opposite directions on the blades during the working of the scissors. This has a tendency to throw the cutting edges of the blades one against the other to a certain extent. It is also well known that great difiiculty is experienced in adjusting the pivotstud so that the blades may be made to cut throughout their length and yet have said stud loose enough to permit working of the scissors comfortably without lost motion.
Therefore it is the purpose of this invention to overcome the above-mentioned and other disadvantages and to furnish scissors and shears having a pivot-stud controlled in connecting the blades by a spring of special form carried by one of the blades and concealed by the blades, whereby the blades are sharpened in working them.
In the accompanying drawings, forming part of this application, Figure 1 is an elevation of a pair of scissors in open position. Fig. 2 is a similar view showing the scissors closed. Fig. 3 is an elevation of part of the spring-carrying blade. Fig. 4 is a sectional view on the line m at, Fig. 2. perspective view of the spring.
The same reference-numerals denote the same parts throughout the several views of the drawings.
The invention is applicable to any ordinary form of scissors or shears by simply making a cavity in the inner face of one of the blades, preferably the blade 1, having a screw-aperture 2, the other blade 3 having the usual countersunk aperture for the screw or pivot- Fig. 5 is a detail stud 4. The cavity 5 is made as close to the aperture 2 as possible and at an angle to the edges of the blade. The-cavity is of a depth equal to the thickness of the spring 6, when the latter is compressed, and said cavity is only of sufficient length and width to hold the spring. The spring is preferably composed of a short length of sheet-steel folded upon itself at 7 to form a curved bottom arm 8, adapted to rest on the bottom of the cavity, and a top arm 9, having a compound curve forming a bearing 10 for the blade 3. The said bearing is placed in the cavity nearest the cutting edge of the blade 1, and when the pivot-stud is screwed into desired position the spring will tilt or incline the blades slightly, or sufficient to produce uniform contact of the cutting edges of the blades throughout their length.
It will be observed that the spring-pressure may be varied as desired by a slight adjustment of the stud, that a loose stud is held in place by pressure of the spring on the blades, and that the spring is wholly concealed by the blades, so that it cannot be caught by or interfere with the material during cutting thereof, and that the blades sharpen themselves during their working.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-
1. The combination, with a pair of scissors, shears or similar implement, one of the blades thereof having a cavity in its inner face adjacent its pivotopening, of a platespring having an arm fitting the cavity and an arm bearing on the inner face of the comanion blade.
2. The combination, with a pair of scissors, shears or similar implement, one of the blades thereof having a cavity in its inner face adj acent its pivot-opening, of a plate-spring car- IOU ried hy the cavity and having a bearing-arm pound curved arm forming a bearing for the termlnating adjacent the cutting edge of this other blade. 10 blade and engaging the inner face of a com In witness whereof I hereunto set my hand panion blade. in the presence of two witnesses.
3. The combination, with a pair of scissors MARCELLOUS TOWNSAND SMITH. the inner face of one of its blades having, a Witnesses: cavity, of a V-shaped plate-spring having a HOWARD K. SoPER,
curved arm seated in the cavity and a com- DAVID G. BRYANT.