US613978A - Animal-shears - Google Patents

Description

I No. 68,978. Patented Nov. 8', I898. H. V. DUNN.

ANIMAL SHEARS.

(Application filed Nov. 5, 1897.)

(No Model.)

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UNITED STATES PATENT HUGII V. DUNN, OF HURRICANE, WEST VIRGINIA.

ANlMAL-S HEAR S srmmmolv forming part of Letters Patent No. 613,978, datedi Iovember s, 1898. Application filed November 5,1897. Serial No. 657,616. on model.)

To all whom it may concern:

Be it known that I,' HUGH V. DUNN, of Hurricane, in the county of Putnam and State of West Virginia, have invented certain new and useful Improvements in Animal-Shears; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

This invention relates to shears for clipping wool, &c., and is an improvement upon the shears for which I obtained Letters Patent of the United States No. 540,156, dated May 28, 1895; and the objects of the present invention are to overcome difficulties which sometimes arose in the use of my patented shears, as hereinafter explained, and to simplify the construction of said shears as a whole. I accomplish these objects by doing away with the slot B the spring f, and bolt F of said patent and by connecting the front or inner ends of the X-levers E e to the handles A A and using these X-levers as the springs for holding the blades in cutting contact.

The invention therefore consists in the improved and novel construction and combination of parts hereinafter. described, summarized in the claims, and illustrated in the aceompanying drawings, in which- Figure 1 is a top plan view of the shears. Fig. 2 is a transverse section on line 2 2, Fig. 1. Fig. 3 is a longitudinal section through the shears, and Fig. 4 is an enlarged front view thereof.

I will refer to said drawings by the same let ters of. reference used in my said patent, so far as the parts are similar or substantially so, and will distinguish the novel features of the invention by reference -letters not found in such patent.

A A designate the opposite handles of the shears. The rear end of handles A A are pivotally connected to the ends of a bent flat band-spring D, as described in said patent, which tends to force the handles apart.

A stationary comb-blade B is fixed on the front end of handle A, and has a series of parallel teeth I). On the outer end of handle A is a cutting-blade G.

It will be observed by reference to Figs. 1

and 4 that each tooth b is beveled from the l cutting edge backward toward the next tooth,

such bevel extending from its point to its base,

and that the cutting edge of the blade 0 is diagonal to the cutting edges of the teeth, and this blade, moreover, is concave, substantially as described in my patent. Owing to the bevels of the teeth b and blade 0 it results that as blade 0 moves over the teeth b, or vice versa, the point of blade 0 will drop below the point of the tooth with which it is going to coact, although the heel of the blade will rest upon the heel of the cutting edge of the tooth, and then as the blade moves over the tooth the cutting edge of the blade will ride up on the cutting edge of the tooth, and thus an efiectual' shear cut will be realized. The point of contact, however, between the cutting edge of any tooth is always minute, and as the contact-point recedes from the base of the teeth and blade the resistance of the spring (the X-levers in the present instance) which holds the blade and teeth in contact increases, and thus a practically uniform contact-pressure is maintained between the blade and the coacting tooth. Furthermore, by reason of these bevels the bending over of the wool or material upon the teeth before it is cut is prevented and a clean cut is insured.

The rear ends of handles A A are provided with horizontal slots A in which are respectively pivoted the rear ends of the X-levers E e, the slots maintaining the levers in horizontal position. The levers E e are pivoted together at their point of intersection, and their front ends, instead of working in guide slots or grooves in the handle, as in said patent, are provided with curved slots E and a, respectively, through which pass pins J and j, respectively attached to handles A A.

These slots and pins allow the front ends of the levers the proper amount of play when the handles are drawn toward each other. The object of using-these slots and pins is to prevent the front ends of the X-levers leaving the handles.

Sometimes in using mypatented shears if an unyielding or tough object was caught between the blades C and B the pressure on the handles A would bring their rear ends toward each other, closing the X-levers, whose front ends would leave the handle, while the blades 13 C were not moved; but by confining the front ends of the X-levers to the handles, as herein shown and described, this unwonted action of the shears is prevented, and the blades B 0 must move with the handles if they are moved toward each other either at front or rear. I also in the present invention utilize these X-levers E e as the springs for holding the blades B G in proper cutting contact, thus dispensing with the parts F ff and slot 13*, (shown in the patent,) which sometimes would become clogged or would catch the wool, &c.

A sleeve J is placed on pin J underneath the end of lever E, and a similar sleeve j is placed on pin j above the end of lever e. As the lovers E e are normally held in horizontal position by the slots A in the handle, if the front end of lever E is elevated it will tend to elevate blade B, and if the front end of lever e is depressed it will tend to depress blade 0. It thus results that by pressing the front ends of levers E c in proper direction blades B O are pressed closely but yieldingly together at all times by reason of the resiliency of the X-levers.

To the handle A over the pin J is secured a thumb-piece A which renders the tool more easily handled by the operator, and the grasp of the hand also assists in keeping the blades B O in proper cutting contact.

From the foregoing description it will be seen that I have much simplified my patented shears and at the same time increased the efiiciency thereof.

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

1. An animal-shears consisting of a pair of handles cutting-blades thereon, and a spring for forcing said handles apart; with a pair of spring X-levers secured to and between the handles at both ends substantially as described, whereby the cutting-blades are kept yieldingly in contact and the handles are also kept parallel when the shears are operated, substantiallyas and for the purpose described.

2. An animal-shears consisting of a pair of handles cutting-blades thereon, a spring for forcing said handles apart, and a pair of X- levers pivoted to each other and secured to and between the handles in such manner that the handles are thereby kept parallel when the shears are operated and means for pressing the front ends of the levers in opposite directions whereby the cutting-blades are also thereby kept yieldingly in contact substantially as described.

3. In an animal-shears the combination of a pair of handles, the blades carried thereby, and spring for separating the handles; with the X-levers interposed between and respectively connected to opposite handles at their rear ends, and having a pin-and-slot connection with the handles at their front ends, for the purpose and substantially as described.

4.. An animal-shears consisting of a pair of handles cutting-blades thereon, a spring for forcing said handles apart, and a pair of X- ]evers pivoted to each other and secured at their rear ends to the rear ends of the handles, and having slots in their front ends, through which pass pins attached to the handles, for the purpose and substantially as described.

5. In an animal-shears, the combination of a blade having a series of teeth, each tooth being beveled backwardly from its cutting edge toward the cutting edge of the next adjoining tooth; and a coacting blade having its edge slightly diagonal to the edges of the teeth and adapted to have its point drop below the points of the teeth until its edge rides up on the cutting edge of a tooth, substantially as and for the purpose described.

6. In an animal-shears, the combination of the handles the blade attached to one handle having a series of parallel teeth, each tooth being beveled backwardly from its cutting edge to the base of the tooth, the bevel being greatest at the point of the tooth; and a cuttinglade attached to the other handle concaved on its under side, and having its edge slightly diagonal to the edge of the teeth, all substantially as and for the purpose specified.

'7. In a shears, the combination of a pair of handles, the blades carried thereby, and X- levers interposed between and connected to the handles at the ends of said levers, where= by the handles are kept parallel when the shears are operated and devices interposed between the handles and front ends of the le vers whereby the latter are pressed in oppo site directions and thus serve to also keep the cutting-blades in contact.

8. In a shears, the combination of a pair of handles, the blades carried thereby, and X- levers interposed between the handles, respectively pivotally connected to opposite handles at their rear ends, and slidably connected to the handles at their front ends, said X-levers being so arranged that they keep the handles parallel when the shears are operated and also keep the cutting-blades in contact.

9. The combination of the handles, the blades carried thereby, and spring for separating the handles; with the X-levers interposed between the handles and pivotally connected at their rear ends to the rear ends of the handles and slidably connected to the handles at their front ends, and means for pressing the front ends of said X-levers laterally in opposite directions, whereby the blades are held in yielding contact, for the purpose and substantially as described.

10. The combination of the handles, the blades carried thereby, and spring for separating the handles; with the X-levers interposed between the handles and pivotally connected at their rear ends to the rear ends of the handles and having slots in their front ends engaging pins secured to the handles,and means for pressing the front ends of said X- eiaets 3 sleeves on said pins, respectively, above and below. the end of the X-levers, all substantially as and for the purpose described.

In testimony that I claim the foregoing as 15 my own- Iaffix my signature-in presence of two witnesses.

HUGH V. DUNN.

In presence of-- J AMES' R. MANSFIELD, ARTHUR E. DoWELL.

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