USRE3883E - Improved vise - Google Patents

Description

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EDWIN cnAwLEY AND -frHoMAs L.

BAYLIES, OF RICHMOND INDIANA.

IMPROVED VISE.

The Schedule referred to in these Letters Patent and making parl: of the sama.

To all whom it may concern:

Be it known that we, EDWIN GnAwLnY'and THOMAS L. BAYLIES, of Richmond, in the county of Wayne and State of Indiana, have invented a new and useful Improvement in Automatic Vises and lwe do hereby declare that the followingis a full, clear, and exact 'description of the same, reference being had to the annexed drawings making a part of this specification, in which- Figure 1 is an elevation oiour improved vise, showing the position the parts assume when the jaws are not pressing upon anything.

Figure 2 is an elevation showing the position the parts assume when the jaws are 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 actuating-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 motion is 'automatically changed to a slower one, giving increased force when said jaw comes in contact with the thing to bc held. 1

A in the drawings represents the back or fixed jaw of the vise, which is to be provided with the necessary projections by means ot' which it is secured to the bench. l

In the accompanying example said jaw is provided with ears A', which may be formed upon the jaw, or may be made separate and secured thereto by bolts or rivets.

A modification oi' the construction of jaw A may be made, by which the ears A' are dispensed with, and in place thereof a `projet-.ting toe-piece is secured to the lower end o thejaw, to which the lever E is hinged.

B is thJe movable jaw, and is provided with a projection, B', near its lower end, which ts between the earsA, and is held in contact with lever .E by theaction of spring G. In the modification hereinbefore referred to the lower end of jaw B is hinged to the lever E at a point near the fulcrum of saidlever.

The screw O is of ordinary construction, excepting that its threads are much coarser than those on screws ordinarily employed for such purposes, so that the jaw may have a more rapid mot-ion when being adjusted than it does-in ordinary vises. This arrangement is of great importance iiiyises of this construction, as it results in a considerable saving of time, inasmuch as, when the jaw is approaching to or receding from the article to be clamped, its movements will be rapid, and as the compressing force to be applied does not depend entirely upon the screw, but upon the action of a series of levers in combination therewith, it follows that any required compressing force can be applied by it. The head of screw C is supplied with the usual handle or lever for turning the same.

E represents a lever, which, when the jaws of the vise are not acting against any article between them, occupies a position parallel to the iixed jaw A', as shown in fig. 1, where it is held, in that case, by a spring, H, another form of the spring being shown at fm.. In this construction oi' the vise the lower end of lever E is situated between the ears A', and is hinged to the lower side of said ears.

The upper end of lever E is bii'urcated, and iu this arrangement yof parts a nut, I), is secured to the upper end of said lever, through which screw C passes, by means of which lever E is operated.

In order to accommodate nut D, as held by screw (l, to diiierent positions of lever E, said nut is supported on journals having their bearings in the bifurcations of lever E. i

F represents an arm,whieh in the present case is pivoted on the 'side of movable jaw B, at a point nearly opposite the center of screw (3, and extends in va line therewith to some distance beyond iiied jaw A.

Upon the upper edge of that portion oi' arm F, which comes opposite jaw A, and for some distance each way therefrom, there are formed serrations or teeth which serve to receivethc end of a pawl or dog, 1, for a purpose hereinafter explained.

It will be observed that the arm F is provided with a slot, as shown at c, which is for the purpose of allowing it toA travel back and forth with jaw B.' A screw passes through said slot and into jaw A, for the purpose of retaining that end of said arm in position.

XVe have shown and described this bar or arm as attached `to the sides of the jaws, but it is apparent that a slot may be formed through'the jaws and through'lever Il, near its upper end, and this arm be .passed through such slots and be made to operate therein, and that these slots may be located at any desired point beneath screw C.' This moditication will afford a more compact arrangement of'the parts, and place them more completely out ot' the way.

The spring G, which is attached to the lower portions of the jaws, or to projections formed thereon, is for the purpose of acting on said jaws and separating their upper ends when the screw'is turned outward.

' A spring, H, shown in another form at m, is attached to jaw A. and to lever E which yields to the movement ol'I lever E when the atter is drawn, by the action of the screw, away from the fixed jaw A, but' which, when the screw is turned in the opposite direction, operates to draw said lever back to the position Ashown in tig. l of the drawings.

l. represents a dog or pawl, which is pivoted to jaw A at such a point` as will permit its outer end to fall into and engage with the teeth formed upon'the npper surface of' arm F, for the purpose of forming for4 the time a fixed `fulcrnm for jaw B. j

K represents la tripping-toe, which is attached to lever E, and is for the purpose of tripping the pawlI, it being so: arranged with relation thereto that it serves to keep the pawl I from engaging with the teeth on afrm F lwhen the lever E and jaw A are together, and during the operation of adjusting the jaw,

The operation of our improved vise is as followsz.'

The parts being in the position shown in fig. 1 lare ready for the reception ofV the article to be held, the pawl I being raised.

,'Ihe screw G is turned in the proper direction', by which the moving jaw is made to approach the art-icle to bc held, and'when it comes in contact therej with the continuation of the movement of the screw overcomes the resistance of the spring H-or m, and the upper end of lever-E recedes from jawA, as a consequence of which the tripping-toeV is withdrawn from pawl I, thus permitting said paw] to engage with theteeth on arm F, which has the eiect to convert jaw B into a lever for the time, the fulcrum of which is at the point where arm F is pivoted to said jaw.

When jaw B has been converted intoa lever, as, by the above-describedmovement of the parts, the said jaw is actuated by ille pressure of lever E against projection B', thus forcing outward the lower end of vthe jaw, which is supported and guided in its movements by a screw or piu on projection B working ina slot in the ears A. A

As a consequence of the abovefdescribed arrangement of lever E and whatis now both lever and jaw Y pressure of lever E being applied to tbe/ long arm of lever or jawv B, the fulcrum of the latter, as 4before observed, being at'the point where arm F is pivoted to it, thus giving to thevise a largely-increased power' of compression over what could be obtained with the screw alone, while it possesses all the advantages of a rapidly-moving vise when being opened or closed.l

Having thus described our invention,

What we claim and desire to secure by Letters Pat,

ent, is-

1. In combination with B, lever E, nut D, and screw G, so arranged that the movable jaw and lever shall form a compound lever,

operated by the screw for the'compression of an/artijaws, substantially in the maning the spring to yield, .brings into action the united compressing force of the 'screw and com .substantially in the manner set forth.

pound lever,

4. The combination and arrangement ofthe jaws A and B, lever E, nut D, screw O, bar F, pawl I, and

trippingtoe K, substantially asset fort-h.

5. The combination of the screw, the jaws, bar, pawl, and tripper, the paw] engaging the bar so as to convert the latter into a fulcruln on which the movable jaw may cscillate, substantially as set forth. l

EDWIN GRAWLEY.

. THOMAS L. BAYLIES.

Witnesses:

J oHN ELLioT'r, S'rnrfnnn Woons.

the jaw A a movable jaw,

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