US1863910A - Saw swage - Google Patents

Description

June 21, 1932. M'OREY 1,863,910

SAW SWAGE I Filed June 28, 1930 INVENTO CARL MORE) swaging members.

Patented June 21, 1932 UNITED STATES PATENT OFFICE CARL MOREY, OF BIG RAPIDS, MICHIGAN, ASSIG-NOR TOv HAN CHETT MANUFACTURING 7 i (30., OF BIG RAPIDS, MICHIGAN SAW SWAGE Application filed June 28,

This invention relates to saw swages that consist of the usual swaging block formed with a saw-receiving slit and provided with a saw-clamping screw and cam-like rotatable A fork for helping to maintain the swage on the saw is connected to the swage block by an arm. The fork, being in advance of the swage block, is usually termed the front fork and the arm or bracket connecting it to the blockis known as the front bracket. The saw-clamping screw is actuated by a clamping lever and the swaging member is rotated by means of a swaging lever. v

My invention is found in a new arrangement of certain of the parts of a typical saw swage such as that just described and in adapting a compressed air cylinder to the operation of the swage in a novel way.

The objects of my improvement are topicvide a simple, inexpensive, convenient and fast-working construction forthe swage block and for the air cylinder, the front fork adjustment and for the clamping and'swaging levers and their associated parts.

Another object is to provide a tool in which the power cylinder is arranged to take the place of the front bracket that heretofore connected the front fork to the swage block, thus reducing weight and cost of manufacture.

A further object is to support the weight of the power cylinder at bothits endsindependently of the swaging die.

A still further object is to produce a swaging tool that is convenient to handle, more compact and, therefore, capable ofbe ing operated more speedily than other air-actuated swages with which I am familiar.

A still further object is to provide a convenient means for holding the swage steady while it is being manipulated. For that purpose I provide a hand-lever in position to be conveniently grasped by the operator and I may also provide the hand lever with an air Valve and with means for shifting the valve to operate the air cylinder by the mere pressure of the operators thumb.

The means by which I accomplish the above mentioned objects consists primarily in mak- 1930. Serial N0. 464,658.

ing the swage block and the air cylinder integral by uniting them by means of a rigid connection, such as a bracket.

In order to position the swaging member in the swage block so it will give the appropriate tooth shape to the saw it is often necessary to rotate the swage block about its horizontal axis very slightly. I provide for that purpose an upright screw adjustment between the front fork and the front end of the cylinder so that the cylinder end can be raised or lowered'by the operator, and the swage block positioned accordingly.

In my improved construction the front end of the cylinder, including the packing box for the piston rod, is remote from the swaging block and the other end of the cylinder is to the rear. The swaging block and the back end of the cylinder can be located close togetherin a compact space. Two connecting rods, located one at each side of the cylinder, extend rearwardly past the cylinder and are pivotally connected to the arm that operates the swaging member. The connecting rods are, therefore, relatively long'and their angular movement is correspondingly slight, so that the force of the piston is always applied in nearly a direct line to the swage actuwould be the case if the cylinder were pivoted at one end, and how the alignment and relative position of the several parts is permanently maintained, thereby distinguishing fromconstructions in which the cylinder is pivotally mounted on some part of the tool.

With the foregoing and certain other objects in view, which will appear later in the specification, my invention comprises the devices described and claimed and the equivalents thereof.

In the drawing Figs. 1 and 2 are side views of the invention as it appears when applied to a saw to be swaged, Fig. 1 showing the piston rod partly extended, as on the swaging stroke, Fig. 2 showing the same parts with the piston rod retracted into the cylinder and the swage block drawn back for operation on the next tooth of the saw.

Fig. 3 is a part longitudinal section taken through the supporting handle, showing the air valve and control button.

As is clearly shown in the drawing,numeral 1 is the swage block mounted on the saw 2 which is received in the slot 3 of the block in position to be operated on by the swaging member 4 when the latter is partly rotated by a lever 5. Numeral 6 designates the front fork located in advance of the swage block 1.

In my improvement the swage block 1 and fork 6 are connected together only by theair cylinder 7 which is equipped with'the usual piston and piston rod, in known manner.

The back end 80f cylinder 7 is connected to the swage block 1 by bracket 9 preferably integral with or else rigidly secured to both the cylinder end 8 and the swage block 1, as shown in Fig. 2.

To raise or lower the front end of cylinder 7, in order to slightly tilt the swage block 1 to give the desired shape of tooth as previously noted, I provide on cylinder 7 a projec tion 10, through which passes a threaded bolt 11 that can be moved up and down and held by lock nut 12. The lower end of bolt 11 is fastened to front fork 6 by a nut 13. Adjusting the bolt 11 up or down enables the operator to give a proper degree of tilt to the swage block 1.

The packing box 14 slidingly receives th piston rod 15 at the outer end of which a cross-head 16 is provided, the ends of which are pivoted ,to the corresponding ends of a pair of connecting rods 17, one at each side of the cylinder 7 the back ends of the rod 17 being pivoted to a similar cross-head 18 secured to the upper end of the swage-actuating lever 5.

An abutment 19 on cylinder end 8 and an adjustable stop screw 20 mounted on the cross-head 18 provide the means for adjustably limiting the forward movement of the piston rod and also the forward rocking movement of lever 5 and the forward or working movement of the swage member 4.

I n order that the operator may convenient- .ly'steady the machine while in use and also have its operation under complete control I secure to the bracket 9 a laterally projecting tubular extension 21 and on this extension passages 21a, 216 that lead to the two ends of the cylinder, in known manner. The valve is spring seated, as at 25, and at the upper end of the handle is a push button 26. IVhen the push button 26 is forced down it compresses the sprlng and the valve is in position to supply air to one end of the cylinder through the port 216. WVhen button 26 is released the lever 5 is restored to its original position by spring 25.

In use, the operator places the tool on a saw, as shown, adjusts the swaging members 4 in the usual way, and by means of bolt 11 raises or lowers the front end of cylinder 7 so as to tilt the swaging block 1 to give the desired shape of tooth.

Air supply pipe 24 being connected to a source of compressed air, the operator holds the tool steady by means of handle 22 and by pressing button 26 with his thumb causes the swage member to operate on the saw tooth.

On the working stroke the strain of swaging'is brought as a direct pull on the connecting rods 17 and, therefore, these rods may be light, and yet strong enough for the purpose.

The piston rod packing box 14, being on that end of the cylinder remote from the swaging mechanism, can be as long as necessary, without increasing the overall length of the tool. In a tool of this sort the item of weight is of importance and every pound saved is in the interest of more accurate and faster work. 7 r

In the tool herein described the weight of one end of the cylinderis supported on the swage block 1 and the weight of the other end is carried by the bolt 11 and fork 6. None of the cylinder, piston, piston'rod or crosshead weights is carried by the swage member 4, which is consequently left free to perform its work of tooth shaping accurately and in its intended'manner.

Quick and easy withdrawal of swage 4 from the block 1, along with lever 5 is provided for by arranging cross-head 18 and its associated parts as shown in Figs. 1 and 2,

where numeral 18a indicates a vertical slot in the cross-head bracket and 18b designates aset screw. The middle part of cross-head bar 18 is shaped to slip downwardly into the slot where it is secured by the set screw. Unfastening the screw 18?) and lifting. the bar out of the slot disconnects the connecting rods 17 from the lever 5 and permits the latter and swage 4 to bewithdrawn from the block.

Having thus described my invention, what I claim and desire to secure by Letters Patent is: i

1. A saw swage including a swage block formed with a saw-receiving slot and having a swaging member, a power cylinder having an end rigidly secured to said swage block, a piston rod operative through the front end of the cylinder, at least one connecting rod secured at its front end to the piston rod and extending past the cylinder and operatively connected at its rear end with said swaging member. I

2. A structure as set forth in claim 1 wherein the front end of the cylinder remote from the swage block is supported by a guide member resting-on the teeth of the saw that is being operated on, an adjusting bolt operable between the guide member and said cylinder and arranged to tilt the cylinder and thereby slightly rotate the swage head.

3. In a saw swage of the class described including a slotted swage block and a swaging member in said block and a lever for oscillating the member, a cross-head secured to said lever and projecting laterally beyond a side of the swage block, a power cylinder fixed at one end to the swage block, said cylinder projecting forwardly lengthwise the saw, a piston rod in said cylinder, projecting from its other end and having a cross-head thereon that projects beyond a side of the cylinder, a connecting rod disposed along the side of the cylinder and connecting said cross-heads, an abutment member carried by said lever and arranged to abut against a fixed stop on the cylinder and means for adjusting said abutment member.

4. In combination, a block, a swage member operative therein, a power cylinder, a bracket member integral with and connected to said block and cylinder, a guiding fork in front of the block and beneath the cylinder, and adjustable screw connecting said fork and cylinder adapted to raise and lower the end of the cylinder, and mechanism operatively connecting said cylinder and swage member for the purposes set forth.

5. In combination, a slotted block, a swaging member therein, a power cylinder, mechanism operatively connecting said cylinder and swaging member, said cylinder rigidly secured at one of its ends to the swage block and extending forwardly therefrom, air conduits operatively communicating with the ends of the cylinder and with a source of compressed air, a handle integral with said block, an air-control valve within said handle operatively arranged in communication with said conduits for manual displacement in one direction, and yielding retracting means for restoring the valve to position after such displacement.

6. In combination, a saw swage including a swage head and a swaging member therein, an air cylinder integral with the swage head, mechanism operatively connecting said cylinder and said swaging member, an upstanding swage-steadying handle rigidly secured to the swage head at a side thereof, air control means associated with said handle and operable by the hand that grasps the handle, said means adapted to control the admission or release of compressed air to said cylinder.

7. A saw swage constructed as set forth in claim 6 wherein the swage-steadying handle is formed with a valve chamber, an air valve therein, means for manually actuating the valve in one direction by the hand that grasps said steadying handle, and a yieldable spring arranged to restore the valve to its normal position after such displacement.

the slot of said bracket, and fastening means releasably securing the bar in the bracket.

In testimony whereof, I afiix m si nature.

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