US1529867A - Clamp - Google Patents

Description

March 17. 1925. 1,529,867

R. W. BURNS CLAMP v Filed NOV. 9, 1922 2 Sheets-Sheet l mums March 17. 1925.

R. W. BURNS CLAMP Filed Nov. 9, 1922 2 Sheets-Sheet 2 INVENT R:

ATTORNEYS.

Patented Mar. 17, 1925.

UNITED STATES PATENT OFFICE.

RAYMOND W. BURNS, OF POUGHKEEPSIE, NEW YORK, ASSIGNOR TO JAMES I... TAYLO'R MFG. 00., A CORPORATION OF NEIV YORK.

CLAMP.

Application filed November 9, 1922.

T alt whom it may concern:

Be it known that I, RAYMOND W. BURNS, a citizen of the United States, and a resident of Poughkeepsie, in the county of Dutchess and State of New York, have invented new and useful Improvements in Clamps, of which the following is a specification.

This invention relates to bar clamps, such as are adapted to be used in clamp machines, and I have shown the invention applied to one of the clamps of a clamp ma.- chine, although I desire it to be understood that the invention can be applied to any bar clamp.

The objects of the invention are to secure an improved bar clamp for clamping stock fiatwise or on edge, as in veneering, or for clamping thick stock; to provide a rigid broad work support on which the stock can stand on edge while being clamped together sidewise; to provide broad jaws which project upward from said broad work support in spaced relation ready for clamping; to provide an upper connecting strip upon the tops of the jaws; to make the clamping nut for one of two connecting strips free to move with respect to its jaw upon unclamping, so that the clamping nut for the other connecting strip will positively move the adjustable jaw away from the work; to secure a connection of the upper connecting strip to the rear adjustable jaw by which it can be removed and engaged again by mere insertion; to thus avoid any necessity for the operator to reach back to the adjustable jaw to effect such engagement; to enable the means upon the adjustable jaw for engaging the two connecting strips to be operated simultaneously, and to obtain other advantages and results as may be brought out by the following description.

Referring to the accompanying drawings, in which like numerals of reference indicate the same parts throughout the several views,

Figure 1 is a perspective View showing the invention embodied in a clamp machine clamp;

Figure 2 is a side elevation of the same in central vertical longitudinal section except at its attaching end;

Figure 3 is a transverse section on line 38, Fig. 2, looking in the direction indicated by the arrows;

Figure 4 is a transverse section on line Serial No. 599,781,

l-t, Fig. 2, looking-in the direction indicated by the arrows;

Figure 5 is a perspective View of the lower portion of the fixed head from the rear, with one of the bars secured thereto, and

Figure 6 is a detail perspective View of a retaining member for the lower clamping nut.

In the specific embodiment of the invention illustrated in said drawings, 1 indicates a spanner foot which is disposed transversely of the clamp and extended upwardly from the same to provide a bearing 2 for a cross-rod 3 of a clamp carrier and also extended downwardly from the clamp to provide a fork 4 to receive another cross-rod 5. I have for convenience shown sa d spanner foot as a means for connecting the ion gitudinal angle bars 6, 6 of the clamp, although it will be understood that any other suitable and well-known form of foot or means for joining the ends of said angle bars or holding them in fixed relation to each other, may be employed without departing from the spirit and scope of the invention. l

The angle bars 6, 6 are also a specific form of bar which is for convenience used to illustrate my invention, and other wellknown forms of bars may be employed. The angle bars shown are arranged in parallel relation with two of their flanges vertical and adjacent and the other two horizontal and extending outwardly apart from each other to form a work table, and at their ends away from the spanner foot 1 the bars 6, 6

. are secured to a head 7, as by being riveted thereto by their vertical flanges and also by their horizontal flanges, as clearly shown'in Figures 1 and 2. The portion of this head 7 which lies between the bars spaces them the same as the foot 1, and that portion of the head which overlies the upper surface of the bars is wider and forms an upwardly projecting fixed jaw 8 against which the work is adapted to lie, see Figure 2. The lower part of the head between the bar 6, 6 is apertured longitudinally of the same, said aperture being enlarged as at 9 to receive a rotatable nut 10 which has a handle 11 at its front projecting end for turning and is provided adjacent the head with an annular flange 12 to be engaged by a retaining member 13 to prevent longitudinal movement of the nut, while permitting such free rotation.

The threaded. endl l of a connecting. strip enters said nut 10, said strip extending between the bars 6, 6 toward the foot 1 and serving to engage an adjustable jaw 16 to clamp the same toward the. fixed jaw 8. Preferably the rearwardly extending portion of the head 7 forms wings 17, 17 at-- Qp.

The adjustable jaw 16 seats slidably upon I the work supporting surfaces of the bars 6,

6 and has arms 19, 19 extending downwardly betweenthe bars 6,6 adjacent thereto and connected at their lower ends'by a crosspiece 20 whichnnderlies said bars 6, 6, said arms also having another cross-piece 21 higher up between themselves which sup ports the connecting strlp 15, see F gures 2 and3. A bell cranklatch 22-mounted upon the adjustablejaw 16 to swing verti-- cally normally has one of its arms 23 projected into one of a series of apertures 24 in r the connecting strip 15' by a spring 25, as

said aperture lies above the upper crosspiece 21, to connect the adjustable jaw to said connecting strip; at the same time this connection can be released by swinging the latch 22ito withdraw its arm 23 from the aperture 2 1, and thus the adjustable jaw may be set wherever desired for clamping purposes.

The construction thus far described c orresponds in a general way to that shown in pending application Serial No. 508,029, filed August 10, 1922, but in the construction of that application no means were provided for clamping the tops of the fixed and adjustable jaws, toward each other, such a clamp being adapted for comparatively thin work. In the present application a construction is provided for very thick stock' -1ng str p he'has only to push its rear end or work, and a feature of the invention is t'hatthe upper ends of the fixed and adjustable jaws are also provided with means for clamping them together, as well as the lower ends. proved clamp, it will be noted that the adustable jaw 16 has at its top arms 26, 26

which project upward and are provided with a crosspiece 27 between themselves which forms a slldeway for an upper connecting strip 28 parallel to the lower connecting strip15 andhaving similar apertures 29. A. bell-crank latch 80 is'also mounted upon the adjustable. jaw 16 to swing vertically,

.andnormally its arm 31 is projected into i j possible embodnnentof the invention, it Wlll one of the apertures, 29 of the connecting strip 28, by a spring 32, as said aperture lies beneath the cross-piece27, to connect the ad- Describing this feature of the im ,justable jaw to'the upperoonnecting strip 28. The operating arms33, 34 ofv the two latches extend toward each other, as shown in Figures .2 and3, and. thus they can be readily grasped and operated by one hand, if the operator so desired.

A, The upper end of the fixed jaw 8, or head 7, is constructed like the lower end, already described, having a narrowed middle extension 35 which is apertured to receive loosely the threaded end 36 of the upper connectingstrip 28, the aperture being enlarged at its end portion next the front of the head toreceive a rotatablenut. 37 with a handle 38 for turning. Wings 39, 89 extend rearward, with recessed guideways 40 for the edges of the connecting strip extending forwardly through the adjacent smaller end portion ofthe aperture,-and while the nut 37' is provided with a flange 41'toengage the front end of, the aperture, said nut is preferably left free to move outward when slackened or unscrewed, This obviates any necessity for turning both the upper and lower clamping nuts together, in clamping-and unolamping, and enables them to be operated independently and A successively. For example, in clamping, the lower clamping nut 10 is set uptightand then the upper one 37 is clamped, and in unclamping, the upper nut 37 is first slackened and then the lower one 10 unscrewed to force the adjustable jaw away from the work. lVhile' I prefer to provide a retaining 'member' 13 for the lower clamping nut 10, it could obviously be applied to the upper clampingnut 37 and the lower ,one left free to move outward or forward, if desired, sincethe opposite ends 'ofthe head 7 are the same.

Furthermore, if" it is desired to remove theupper connecting strip 28 entirely for the insertion of work or any other purpose,

1 it can be done'by disengaging-the latch 30,

and drawing the whole strip, with its cl amping nut 37, forwardly out through itsfaperture in the-top of the head 7. Then when the operator replaces said upper connect- .necting strip into'itsi place.

Also, the angle bar construction of the bars .6, 6 provides a broad supporting surface for'work to stand .edgewiseupon wuzhout damaging its edges, and at theasame ,time the fixed and, adjustable; jaw-sarei enabled to be broad at their facing sides to engage the sides of the work.

While I have-shown. and described one be understood that this is onlyforthe, purpose of illustrating the principles of the invention and that many modifications and changes can be made in the detailconstruction without departing from the spirit and scope thereof. Therefore, I do not desire to be understood as restricting myselfexcept as required by the following claims when construed in the light of the prior art.

Having thus described the invention, what I claim is:

1. In a clamp, the combination with a bar, jaws on said bar adapted to oppositely engage a piece of work, and means for clamping said jaws together at their ends next said bar, of a clamping member for clamping together the other ends of said jaws, and means upon the tops of said jaws for engaging said clamping member.

2. In a clamp, the combination with spaced angle bars having two flanges parallel and the other two diverging in the same plane to form a broad work support, and broad work-engaging jaws on said bars, of connecting strips for said jaws one at their lower ends and between said bars and the other upon the middles of their tops, and means for moving said connecting strips longitudinally of themselves with respect to one of the jaws.

3. In a clamp, the combination with a bar, jaws on said bar adapted to oppositely engagea piece of work, and means for clamping said jaws together at their ends next said bar, of a connecting strip for clamping together the other ends of said jaws, and means upon said other endsof said jaws one for holding said connecting strip when it is pushed into engagement therewith and the other for moving said connecting strip longitudinally of itself.

4. In a clamp, the combination with a bar, a fixed jaw and a movable jaw on said bar, and means for clamping said jaws together at their ends next said bar, of a connecting strip for clamping together the other ends of said jaws, means on the movable jaw for holding said connecting strip when it is pushed into engagement therewith, and means on the fixed jaw for drawing upon said connecting strip.

5. In a clamp, the combination with a bar, a front jaw and a rear jaw on said bar, and means for clamping said jaws together at their ends next said bar, of a connecting strip for clamping together the other ends of said jaws, means on the top of the rear jaw for holding said connecting strip when it is pushed into engagement therewith, and means on the front jaw for drawing upon said connecting strip.

6. In a clamp, the combination with a bar, jaws on said bar adapted to oppositely engage a piece of work, and means for clamping said jaws together at their ends next said bar, of a connecting strip for clamping together the other ends of said jaws, a slideway for said connecting strip on one of said jaws, means permitting insertion of said strip in said slideway and holding it against withdrawal, and means on the other jaw for drawing upon said connecting strip.

7. In a clamp, the combination with a bar, jaws on said bar adapted to oppositely engage a piece of work, and means for clamping said jaws together at their ends next said bar, of aconnecting strip for clamping together the other ends of said jaws, a slideway on one of said jaws, a latch permitting insertion of said strip in said s'lideway and holding it against withdrawal, and means on the other jaw for drawing upon said connecting strip.

8. In a bar. clamp, the combination with jaws adapted to oppositely engage a piece of work, of connecting strips extending between the opposite ends of said jaws, and means for moving said connecting strips longitudinally of themselves, one in both directions and the other in only one direction.

9. In a bar clamp, the combination with jaws adapted to oppositely engage a piece of work, of connecting strips extending between the opposite ends of said jaws, and means on one of said jaws for both pulling and pushing upon one of said connecting strips and only pulling upon the other. 7

10. In a clamp, the combination with a bar, jaws on said bar adapted to oppositely engage a piece of work, of connecting strips extending between the opposite ends of said jaws, and means for moving both said con necting strips longitudinally of themse ves, the one next the bar in both directions and the one away from the harm only one direction. r

11. In a clamp, the combination with a bar, jaws on said bar adapted to oppositely engage a piece of work, connecting strips extending between the opposite ends of said jaws, and means for moving both said. connecting strips longitudinally of themselves, the one next the bar in both directions and the one away from the bar only in clamping direction.

12. In a clamp, the combination of two jaws adapted to engage opposite edges of a piece of work, connecting strips extending from one of said jaws to the other at the opposite ends thereof, means on one of said jaws for adjustably engaging said strips, and clamping nuts upon the other jaw engaging the other ends of said connecting strips, one of said nuts being held against movement in either direction and the other free to move in one direction.

13. In a clamp, the combination of two jaws adapted to engage opposite edges of a piece of work, connecting strips extending for said connecting strip frorn'one of said jaws to the other at the opposite ends thereof, means on one of said jaws for adjustably engaging said strips, and clamping nuts 'upon' the other jaw engaging the other ends of said connecting strips, one of said nuts being held against movement longitudinally of the strip in both directions and the other free to move longitudinally backward when unscrewed.

14. In a clamp, the combination of a jaw having a seat and a wing projecting longitudinally from said seat, said seat and wing having a longitudinal recess in the inner wall thereof, a clamping screw loose in said seat, a handled nut on said screw at the front of the head, a connecting strip extending rearwardly from said screw and having a projecting lateral edge lying'in said recess to resist turning in either direction, and a second jaw adapted to be engaged by said strip.

15. In a clamp, the combination of a jaw having at its opposite ends parallel seats with longitudinal recesses therein, clamping screws loose in said seats, handled nuts on said screws at the front of the jaw, connecting strips extending rearward from said screws and engaging said recesses to resist turning, and a second jaw adapted to be engaged by said strips.

1 6. In a clamp, the combination with a bar, aws on said bar adapted to oppositely engage a piece of work, and connecting strips extending from one of said jaws to the other, of latches on one of said jawsfor engaging said connecting strips, said latches arranged and adapted to be operated either Separately or together.

17. In a clamp, the combination with abar, jaws on said bar adapted to oppositely engage a piece of work, and connecting strips extending from one of said jawsto the other,of oppositely disposed latches on one of said jaws between said connecting strips,

screw and having a projecting lateral edge lying in said recess to resist turning in either direction, and a second aw adapted to be engaged by said strip.

19.In a clamp, the combination of a jaw having a seat and a wing projecting longitudinally from said seat, a clan-ipingsc-rew loose in said seat, a handled nut on said screw at the front of the head, a connecting strip extending rearward from said screw andhaving a projecting lateral edge engaging said wing to resist turning in either direction, and a second jaw adapted to be engaged by said strip.

' 20. In a clamp, the combination of a jaw having a seat and a wing projecting from said seat,a clamping screw loose in said seat, a handled nut on said screw at the front of the head, a connecting strip extending rearward from said screw and en gaging said wing to resist turning in either direction, and a second jaw adapted to be engaged by said strip.

21. In a clamp, the combination with spaced bars forming a work support, and work-engaging jaws on said bars, of connecting strips for said jaws one at their lower ends and between said bars and the other at the tops of said jaws, and means for moving said connecting strips longitudi nally of themselves with respect toone of the j aws. A

. RAYMOND Wt BURNS.

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