US89469A - Improved vise - Google Patents

Description

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,States *rmt EDWIN CRAWLEY AND THOMAS L. BAYLIES, OF RICHMOND, INDI- ANA.

,Letters Patent No. 89,469, dated April 27, 1869.

IMPRovED vIsE.

The Schedule referred to in these Letters Patent andl mkiifg part of the same.

vnot pressing upon anything.

Figure 2 is an elevation, showing the position they assume when pressing an object which has been placed between them, or when they come in contact with each other.

Figure 3 is a perspective view of the nut, through which the tightening-screw passes.

Corresponding letters in the several figures represent corresponding parts.

This invention relates to an improvement in automatic vises, or that class of vises the moving jaw of which has a rapid motion, when being adjusted with reference to the object to be secured therein, but which has a slower motion, and an increased force imparted to it, when it comes in contact with the thing to be held; and

It consists in the combination and arrangement of the parts of which it is composed, as will be more fully described hereinafter.

A, in the drawings, represents the back, or fixed jaw of the vise, which is to be provided with the necessary projections for securing it to a bench, and ata suitableplace, with reference to its length. It is to be provided with ears, A', which may be formed upon said jaw, or they may be made separate therefrom,` and be secured to it by bolts, or rivets -At the point where these ears, or projections are joined to the jaw A, it isto be reduced in thickness, so that the space between such ears shall onlybe equal to the thickness of the jaw B, at the point wherev it enters between said ears.

B represents the outer, or movable jawk of the vise, which may be of wrought, or cast-metal, and provided with the projection B upon its inner edge, for entering the space between the ears upon jaw A. It is to be of any required length, and is to have the usual aperture through its upper end for the passage of the tightening-screw. t

C represents the tightening-screw, which may be of the usual construct-ion, except that it is to have a much coarser thread than screws usually employed for such purposes, so that the jaw may have a more rapid motion than it does in ordinary vises. This arrangement is of great importance in vises of this construction, as it results in a considerable saving of time, in-

asmuch as, when the jaw is approaching or receding from the article to be clamped, its movement will be rapid, and, as the force to be applied doesnot depend 'entirely upon the screw, but upon the'action of a series of levers in combination therewith, it follows that any required amount oi" compressing-force can be applied by it. This screw is to have the usual head'upon its outer end, and is to be supplied with the usual handle,

or lever for turning the same.

D represents the nut,through which screw O passes..

Upon each end of this nut journals may be formed,

`for the purpose of enabling i-t to t within and control the movements of the lever E, The back side of this nut, or that portion of it which comes in contact with -the stationary jaw of thevise, is slightly curved, or

rounded, so as to insure its always having a fair bearin g upon such jaw, when in contact therewith.

It will be seen, upon reference to fig.y 2 of the draw-l ings, that as lever E and nut D recede from the fixed jaw, the nut, in order that it may maintain its proper position with reference to the screw, must necessarily partially rotate upon the journals formed -upon it,

[which is an additional function performed by such journals.

E represents a lever, which, when the jaws of the vise are not acting upon any article to hold the same, assumes the position shown in iig. 1, which is about in line with the inner edge of the ixed jaw A. The

lower end of this lever passes between the ears, or

projections A', and is pivoted to them at a point near their lower edges, while its upper bifurcated end extends to and embraces the nut D.

F represents an arm, or lever, which, in the present case, is pivoted to the movable jaw upon its edge, and at apoint nearly opposite the centre of the tighteningscrew, and extends, nearly in a line therewith, to andsome distance beyond the rear side of the .fixed jaw A.

rUpon that portion of the. upper surface of this arm, or lever which comes opposite the fixed jaw, and for some distance each way therefrom, there are formed serrations, or teeth, which -serve to receive the end of the pawl, or Adog I, for a' purposel to be hereinafter ex'- plain'ed.

Itvwill be observed, that this arm is provided with a slot, as shown at c, which is for the purpose of allowing it to travel back and forth with the jaw B, a screw passing through said slot, and into jaw A, for the purpose of retaining the back end of said lever in position during such movement.

We have shown and described this bar, or arm as attached to the edge of the jaws, but it'is apparent that a slot may be formed through the jaws, and,

This last-named arrangement we prefer for some forms of vises, and especially for such as are made of wrought-iron, as in such casesfthe forming of such slots will not endanger, to any great extent, the breaking of such jaws, and, as it willaiford a more compact arrangement of the parts, and place them more coml pletely out of the way, and where they would be less likely to be injured by falling weights.

G represents a spring, which is to be attached to the lower portion of the jaws, or'to a projection formed thereon, for the purpose of acting upon such jaws for the purpose of separating their upper ends, as the Vtightening-screw is turned outward.

H represents a spring, which may be attached to I represents a dog, or pawl, which is to be pivotcdv to the jaw A, at such a point as will permit its outer end to fall into and engage with teeth formed upon the upper surface of the arm, or lever F, for the purpose of bringing the lever-F into action so soon as the v jaws come in contact with the article to be held.

K represents a tripping-toe, which may be attached to the side of lever E, or it mayhave a projection upon its side, which may rest within the slot of such lever. In either case, it is to travel with said lever, and is for the purpose of tripping said pawl, it being so arranged with relation thereto, thatwhen the jaws-of the vise are to be separated for thepurpose of receiving the article to be held, it will, by the action of spring H and lever E, raise the pawl out of the notches,

or arm F, and thus permity jaw B to follow the movements of the screw.

The operation of our improved vise is as follows:

The parts being in the position shown in g. l, are ready for the reception of the article to be held. The pawl I, having been raised by the action of spring H and lever E, the article to be held is to be inserted between the jaws, and screw C turned in the proper direction,to cause the moving jaw toapproach such article; and when it comes in contact therewith, the continued movement of screw G overcomes thetensionvof spring H, and the upper end of lever F commences to recede from jaw A; the rst'result of which is to cause the tripping-toe to recede from pawl I, and permit said, pawl to engage with the teeth formed upon arm F, which has the eifect to convert jaw B into a lever for the time, the fulcrum of which is at the point at which the arm F is pivotcd to said jaw.

When the jaw B has been converted into a lever, by the abovedescrbed movement of the parts, the

projection B', upon its lower portion, is brought in contact with lever E by reason of the fact that lever E, so soon as it leaves its position in contact with jaw A, commences to approach this projection, and, w-hen in contact therewith, serves as the moving power for what is now both lever and jaw B, thus forcing cutward its lower-end, which is guided in its movements by a screw working in -a slot, b, formed in the ears upon jaw A.

As a consequence of the above arrangement of the levers F and B, a large increase of power is obtained by the further turning of' screw C, as it is apparent that the distance from the point at which lever F is pivotcd to jaw A, is nearer the point of its contact with its fnlcrum on lever, or jaw B, than is the point at which the power is applied to said lever, thus leaving the long arm of such lever on the side of the applied force, and the short` arm on the side of the resistance.

A still further increase of power is obtained by the operation of this long arm of lever Eupon the lower or 'long arm of jaw, or lever B, its fulcrum, as before observed, being at the part at which arm F is pivoted to it, thus enabling lever E to press upon its long arm, and thus give to the vise a largely-increased power of compression over what could be obtained with a screw idly-moving vise, when being opened or closed.

Having thus described our invention,

vWhat we claim, and desire to secure by Letters Patent, is v l l. In combination with the jaw A,`a movable jaw, B, lever E, nut D, and screw C, so arranged that the movable jaw and lever shall form a compound lever, operated by the screw forj-the compression of an article placed between the jaws, substantially in the manner set forth.

2. In combination with saidparts set forth' in the first clause of claim, the bar F, and pawl I, arranged to form an adjustable fulcrum for the jaw B, substantially as set forth.

3. The combination of the jaws A and B, screw C, lever E, and nut D, with an adjustable fulcrum and spring, H, so arranged that the movable jaw shall be actuated by the screw in closing upon an article placed between the jaws, until the increased resistance, causing the spring to yield, brings into action the united compressing-force of the screw and compound lever, substantially in the manner set forth.

and B, leverE, nut D, screw O, bar F, paw] I, and j tripping-toe K, substantially as set forth.

In testimony whereof, we have signed our names to this specification, in the presence of two subscribing witnesses.

EDWIN CRAWLEY. THOS. L. BAYLIES. Witnesses:

JAS. A. McMEANs, E. S. BRAGG.

alone, while it possesses all the advantages of a rap- 4. The combination and arrangement of the jaws A

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