US784847A - Foot-vise. - Google Patents

Description

PATENTED MAR. 14, 1905.

J W FORD FOOT VISE.

APPLICATION FILED JAN.11, 1905.

JOHN W. FORD, OF DENVER, COLORADO.

Patented March 14, 1905.

PATENT OFFICE.

FOOT-VISE.

SPECIFICATION forming part of Letters Patent No. 784,847, dated March 14, 1905.

Application filed January 11, 1905. Serial No. 240,632.

To all whom it may concern.-

Be it known that I, JOHN W. FORD, a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Foot-Vises; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in foot-Vises or instruments adapted for use by blacksmiths and others for holding articles, as horseshoes and other metal parts, in place while shaping or forming them to suit the required purpose.

My object is to provide a device of this class which shall be exceedingly simple in construction, economical in cost, reliable, durable, and efficient in use; and to these ends the invention consists of the features, arrangements, and combinations hereinafter described and claimed, all of which will be fully understood by reference to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a side elevation of my improved foot-vise, showing the movable member in the closed position. Fig. 2 is a similar view, partly in section, showing the movable member in the open position. Fig. 3 is a section taken on the line 3 3, Fig. 1, viewed in the direction of the arrow. Fig. 4: is a fragmentary detail view illustrating the parts in the position shown in Fig. 1, but on a larger scale. Fig. 5 is a fragmentary detail View of the upper part of the stationary jaw, being a View looking in the direction of the arrow 5 in Fig. 1. Fig. 6 is a similar View of the upper part of the movable member looking in the direction of arrow 6 in Fig. 1. Fig. 7 is an underneath view of the lever, showing its roller fulcrumed in section, a portion of the lever being detached and its spring being omitted. In this view the parts are shown on a larger scale than in the other views.

.The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a stationary block or post to which is secured the lower part of the stationary member 6. The upper extremity of this member 6 consists of a stationary jaw 7. The member 6 is T-shaped in cross-section. Let 6 designate the web of this member, and 6 the flanges on opposite sides of the web. The movable member 8 is pivotally connected with the web of the member 6, as shown at 9. The part of the movable member above the pivot will be designated 8, and the part thereof below the pivot will be designated 8. The part of the movable member below the dotted line 10 is bifurcated, forming two arms 8, which pass through the flanges 6 of the stationary member and straddle the web 6 of the last-named member. The lower extremities of the arms 8 are curved outwardly from the stationary member, and they are connected by a pin 8 The upper extremity of the movable member is provided with a jaw 8 which cooperates With the jaw 7 of the stationary member.

Pivotally connected at the base of the movable member, as shown at 12, is a U-shaped lever-arm 13, which straddles the lower part of the movable member. Upon the arm 13 is mounted a locking-lever 14, which is connected with the arm by a spindle 15, carrying a roller 16, having bearing parts 16, located on opposite sides of the lever and engaging the arms 8 of the movable member. The said roller is provided with a central circumferential groove. T his central grooved part of the roller is engaged by the locking-lever, which is therefore fulcrumed on the roller. The locking-lever is made in two parts bolted together after they are applied to the roller. Hence the locking-lever is located between the parallel parts of the U-shaped operating leverarm. The outer arm 14 of the lever 1a, or the arm farther from the stationary member, is channeled, while the opposite arm lei is solid. The arm 14 is divided, the two parts being connected by a pin 14 The two parts of the arm 14.: are designated A and B, the part A being nearer the fulcrum. The part B is connected with the part A in such a manner that the part B has independent movement in one direction only, and 1t1s normally held in aline- ICO wardly therefrom toward the movable mem-- ber, the lower portions of the springs engag mg the respective arms 8 of the last-named member. Hence the tendency of these leafsprings is to hold the movable member in the open position, or that shown in Fig. 2, whereby the jaws 7 and 8 are separated.

In describing the operation of my improved device let D represent the floor orsurface upon which the device stands or is mounted. Now assuming that the parts are in the open position, or that shown in Fig. 2, and it is desired to close the jaws or move the jaw 8 toward the jaw 7, the operator places his foot upon the outer extremity of the operating-arm 13 and forces the same downwardly to the position shown in Fig. 1. Duringthis downward movement of the arm 13 the channel-arm 14 of the locking-lever 1 1 strikes the floor I) with suflicient force to throw the arm 14 to the locking position, or into engagement with the toothed edge E of the stationary member. This occurs just before the operating-arm 13 assumes the horizontal or approximately the horizontal position. Assuming now that the movable jaw 8 is against the stationary jaw 7 or against a part (not shown) between the two jaws, there will be a tendency for the lower part 8 of the movable member to move outwardly or away from the stationary member; but this it cannot do, since the arm 14 of the locking-lever is in engagement with the toothed edge of the stationary member, since in order that the lower portion of the movable member may move outwardly it must carry the locking-lever with it, and this would cause the fulcrum 15 of the locking-lever to travel in an arc F (see Fig. 1) in the direction indicated by arrow (0, or toward the stationary member, which of course is impossible. Attention is called to the fact that in the successful operation of this device the arm 13 should not be allowed to pass below the horizontal line G shown in Fig. 1, since if it should the locking-lever could not hold the movable member in the closed position, as in this event the fulcrum-pin 15 in traveling in the arc F would move away from the stationary member during the initial movement of the lower part of the movable member, and this movement would of course disengage the locking-lever from the toothed part of the member 6. Now assuming that the parts are in the locked position, as shown in Fig. 1, if it is desired to unlock the movable member the operator places his foot upon the outer extremity of the locking-lever and a slight downward pressure will cause the part A of the lever-arm 14 to move upwardly, while the part B of said arm engages the toothed edge E. This will break the lever-arm. so to speak, sufliiciently to disengage the part B from the toothed edge E, and thus release the movable member in a manner that will be readily understood. In this event the locking-lever will be thrown to position shown in Fig. 2, and the leaf-spring C will again throw the part B into alinement with the part A of the lever-arm 14:

Having thus described my invention, what I claim is 1. In a foot-vise, the combination of a stationary member and a movable member, the movable member being pivoted on the stationary member, an operating lever-arm pivotally connected with the stationary member below the pivot of the movable member, and a locking-lever fulcrumed on the operating-lever, the fulcrum of the locking-lever being provided with a bearing which engages the movable member below the pivot of the latter, the locking-lever having a jointed arm, a spring for normally holding the two parts of the jointed arm in alinement, the stationary member being provided with a notched or toothed part which is engaged by the jointed arm of the locking-lever when the movable member is in the closed position.

2. In a foot-vise, the combination of a stationary member, a movable member pivotally mounted on the stationary member, a spring normally holding the movable member in the open position, an operating lever-arm pivotally connected with the lower part of the stationary member, and a locking lever fulcrumed on the operating-lever, the fulcrum of the locking-lever having a bearing which engages the lower part of the movable member, the latter being so shaped that the fulcrum bearing on the locking-lever acts to close the operating-jaw of the movable member, as the operating-lever is thrust downwardly.

3. In a foot-vise, the combination of a stationary member which is T-shaped in crosssection having flanges on opposite sides of a central web, a movable member bifurcated to straddle the stationary member, the arms of the bifurcated part passing through openings formed in the flanges of the stationary member, the movable member being pivotally connected with the web of the stationary member, the lower parts of the bifurcated portion of the movable member being curved outwardly from the stationary member, an operating lever-arm pivotally connected with the lower part of the stationary member, the lever-arm being U-shaped and straddling the lower portion of the movable member, and a locking-lever located between the two parts of the U-shaped lever-arm and fulcrumed thereon, the said locking-lever having bearings at its fulcrum which engage the curved arms of the bifurcated portion of the movable member. 7

4. In a foot-vise, the combination of an upwardly-projecting stationary member, a movable member having a jaw at its upper eX- tremity and bifurcated below the jaw to straddle the stationary member and pivotally connected with the latter, springs mounted on the stationary member, acting on the movable member and having a tendency to hold it in the open position, an operating lever-arm connected with the lower part of the stationary member and bifurcated to straddle the lower part of the movable member, the latter being outwardly curved, a locking-lever fulcrumed on the operating lever-arm and having bearings at its fulcrum engaging the lower curved portion of the movable member, one arm of the locking-lever being jointed and a leafspring having one extremity connected with the part nearer the fulcrum while the other extremity bears upon the other part whereby the two parts are normally held in alinement, the stationary member being notched to engage the spring-held arm of the locking-lever when the operating-lever is thrust downwardly, Substantially as descrlbed.

5. In a foot-vise, the combination'of a stationary member, a movable member pivotally 3 connected with the stationary member, an operating lever-arm, and a locking-lever fulcrumed on the lever-arm and carrying a bearing engaging the movable member.

6. In a foot-vise, the combination of a sta- 35 tionary member, a movable member pivotally connected therewith, an operating lever-arm, a roller journaled on the arm and bearing on the movable member, and a locking-lever fulcrumed on the roller.

7. In a foot-vise, the combination of a stationary member, a movable member pivotally connected therewith, an operating lever-arm, a roller journaled on the arm, a locking-lever fulcrumed on the roller, the latter having a 45 circumferential groove engaged by the lever, the roller also having bearing parts engaging the movable member on opposite sides of the lever-arm. 4

In testimony whereof I afiix my signature in 5 presence of two witnesses.

JOHN IV. FORD.

\Vitnesses:

DENA NELSON, A. G. EBERT.

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