US703376A - Vise. - Google Patents

Description

No. 703,376. Patented July I, |902.

c. n. BINGHAM.

VISE.

(Application filed Feb. 7, 1902.) (No Model.)

lam f lllllllll lli llll Wzinamen UNITED STATES PATENT OFFICE;

CHARLES DARWIN BINGHAM, OF \VATERTOVVN, NEW YORK, ASSIGNOR TO PRENTISS VISE COMPANY, OF NEW YORK, N. Y.

VISE.

sPEUIFIlUATlUN forming part Of Letters Patent No. 703,376, dated July 1, 1902.

Application filed February '7, I902. Serial No, 93,068. (No modeli To all whom it may'concern:

Be it known that 1, CHARLES DARWIN BING- HAM, of Watertown, in the county of J efferso'n and State of New York, have invented anew and useful Improvement in Vises, of which the following is a specification.

My improvement relates to what are known as parallel-jaw bench-Vises. Its object is to strengthen the vise and to enable it to more effectively resist tensional strain without enhancing the expense of construction.

I will first describe by reference to the accompanying drawings the manner in which my invention is carried into eifect and will then point out more particularly in the claini those features which I believe to be new and of my own invention.

In the drawings, Figure 1 is alongitudinal central section of a machinists vise embodying my invention. Fig. 2 is abottom plan of the movable jaw detached. Fig. 3 is a front elevation of-the movable jaw. Fig. 4 is a rear elevation of the backjaw or body of the vise.

A is the cast-iron back jaw or body of the vise, which is what is known as a paralleljaw bench-vise. To it is fixed the nut B, which is engaged by the vise-screw E of the movable jaw.

O is the head of the movable jaw. D is its shank, made of wrought iron or steel and having the form of a tubular cylinder. In practice I make it out of the regular gas-pipe of commerce, which is comparatively cheap and can be had in a sufficient variety of sizes and thicknesses to make it available for any desired range in sizes of vises. The head 0 is cast upon the exterior of the wrought-metal cylindrical tubular slide or shank D, the two being united by and during the operation of casting the head 0, and the shank D is then longitudinally slotted, as at (Z, to permit it to straddle the neck I) of the nut B, which is housed in the shank and engages the screw E,

as shown. The cast-iron of the head 0 is stopped out of or excluded from the interior of shank D. If admitted thereto, it would perform no useful office, because in cooling it would shrink and draw away from the interior surface of the pipe. By omitting it there is less boring and cutting of the head for the passage of the screw, and I am also enabled to provide within the compass of the head a chamber f, which may be utilized for a variety of purposes. In the present instance it contains thecollar c, by whichthe screw E is swiveled in the head. This collar after the screw is inserted through the hole bored for it in the comparatively thin front wall of the head is slipped on the stem of the screw to the position shown in Fig. 1 and is there secured tothe shank by a set-screw c, which can be reached through a hole 6 in the head C and pipe D. The vise thus made is exceed ingly strong, durable, and efficient, the cost of construction is not enhanced, the screw is completely housed and protected, and the defects incident to prior constructions, whether 'cast-iron'or wrought-irongare done away with.

lVith very'f'ew exceptions all parallel-j aw bench-Vises, so far as I am informed, aremade of cast-iron'and possess the defects incident tothat material, which is'stron'g in compression, but comparatively weak in tension. The strain which tends to break such vices is in most cases that which tends to hold the jaws apart against the pressure of the screw. This strainis greatest directly underneath the opbeen objectionable and unsatisfactory for the reason, among others, that the intense heat to which it or a portion of it is subjected in the operation of casting and molding the castiron jaw upon it tends to-materially put it out of shape and distort it out of true to such an extent as to make it useless until restored to its'original and proper shape, which lat ter cannot be done except ata costwhichis practically prohibitory; but by giving the wrought-metal shank a tubular cylindrical form these objections are to a very great extent, if not entirely, removed. The wrought metal is put into the best shape possible to resist any tendency to distortion due to the IOO casting operation and to effectively maintain its original shape. The Wrought-metal tube of course is, as hereinbefore stated, left intact until after the cast-iron head of the jaw is fully completed. The longitudinal slot d in the under side of the tube is then milled;

but the tube not being afterward exposed to heat is not distorted, but retains its original shape.

What I claim herein as new, and desire to secure by Letters Patent, is as follows:

In a vise a sliding jaw composed-o1": a castiron head a Wrought-metal pipe-shank united with the cast-iron head by and during the casting operation, and longitudinally slotted, I5

for the passage of the neck of'the feed-nut on the stationary jaw orvisie-body, and a screw to engage said nut swiveled' in the front wall of the cast-metal head and housed in the Wrought-metalpipe-shank, as and. for the 20 purposes hereinbetore set forth,

In testimony whereof I have hereunto set my hand this 1st day of February, 1902.

CHARLES DARWIN BINGHAM.

Witnesses:

FRANK WENZEL,

O. E. KINNE.

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