US94376A - Improvement in chuck - Google Patents

Description

waited giedre parte can.

Letters Patent No. 94,376, dated August 31, 1869.

IMPROVEMENT IN CHUCK.

The Schedule referred to in these Letters Patent and making part of the game.

To all who-m it may concern.-

Be it known that I, W. F. Bacon, of Skowhegain in the county' of Somerset, andState of Maine, have invented a new and valuable Improvement in Portable Chuck-Jaws; and I do hereby declare that the'following is a full, clear, and exact description of the construction and operation yof the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1, ofthe drawings, is a vertical longitudinal section through the centre of my chuck-jaw.

, Figure 2 is a top view of -the chuck-jaw.

Figure 3 is a vertical cross-section through Vthe centre ofthe bolt, in the line x x.

My invention relates to an improvement in chuckjaws, attached to the face-plates of engine or shaftinglathes; and consists, mainly, in a novel arrangement of devices, whereby the chuck-jaw may be easily and securely set up to the work, and `firmly bolted to the face-plate.

The letter A, of the drawings, designates the bedpiece of the chuck-jaw, which is, in form, a parallelopiped, having a slot in its front surface, and formed on its rear surface a rib, B, and bolt G.

The rib B fits in the slot of the face-plate, through which the bolt O passes, on the endof which is screwed the nut vF, thereby rinly securing the chuck-jaw to the face-plate in any desired posit-ion, with reference to the slot of the face-plate.

I) represents the sliding jaw, having a stud or projection, d', formed on its rear side, which slides in the slot in the front surface of the bed-piece A. Out in this projection is a female screw, workin gon a screw, E.

The front portion of the sliding jaw is formed into steps, in order that it may be with greaterv facility ladble end-piece a, which, after the screw is placed in po-l. sition, is secured to the body of the bed-piece by the screws a a'.

The other end of the screw E 1s expanded, forming a collar, e', fitting in a depression in the end of the slotv in the bed-piece, and then contracted, forming a journal, which passes entirely through a bearing in the end of the bed-piece, and finally fashioned into a square head, whereby the screw E -is turned, a key being applied thereto.

lo confine the jaws to the bed-piece, the front surface of the bed-piece A may have formed ou it parallel bars m Im., grooved in their inner surfaces, to receive vtongues a n', formed on the sides of the base of the sliding jaw D; but thisV I do not regard so good a method as that shown in Figure 4.

I do not desire to confine myself to the form ofthe slot in bed-pieceA, as in g. 4, but sometimes prefer to form the grooves with tongues, as shown invg. 3.

What I claim as my invention, and desire to secure by Letters Patent, is-

The adjustable bed-piece A, rib B, bolt G, with nut F and washer G, .the screw E, sliding jaw D, substantially as shown and described.

In testimony that I claim the above, I have hereunto subscribed my name, in the presence of two witnesses.

Witnesses: W. F. BACON.

HIRAM KNOWLTON, Lnvr YOUNG.

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