US820572A - Saw-setting device. - Google Patents

Description

No. 820,572. PATENTED MAY 15, 1906. S. L. HAWN.

SAW SETTING DEVICE. APIPLIGATION FILED JAN. 24, 1905.

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UNITED STATES PATENT OFFICE.

SAMUEL L. HAWN, OF ORISMAN, COLORADO, ASSIGNOR OF ONE-HALF TO ABRAHAM S. (JOAN, OF ORISMAN, COLORADO.

Specification of Letters Patent.

Patented May 15, 1906.

Application filed January 24, 1905- Serial No. 242,480-

To all whom it may concern:

Be it known that I, SAMUEL L. HAWN, a citizen of the United States, residing at Crisman, in the county of Boulder and State of Colorado, have invented certain new and useful Improvements in Saw-Setting Devices, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to saw-sets, and more particularly to that class having) automatic operating-hammers adapted to e actuated by fotpower, one of the objects being to provide a device of the character described by means of which the blow applied to the saw-tooth is uniform and applies with equal force on all parts of the tooth engaged by the hammer or setting-tool, thus obviating imperfect setting by reason of glancing or misdirected blows.

A further object of my invention is to provide a device of the character described whereby the force applied to the hammer may be so regulated that a light or heavy blow may be imparted to the saw-teeth, as desired.

A further object of my invention is to provide a device whereby a suitable setting-tool may be interposed between the hammer and the saw-teeth.

Further objects and advantages of themvention, as well as the structural features by means of which said objects are attained, will be made clear by an examination of the specification, taken in connection with the accompanying drawings, in which the same reference-numerals indicate corresponding portions throughout, and in which Figure 1 is a perspective view of my complete invention, showing saw in dotted lines. Fig. 2 is a longitudinal section. Fig. 3 is a vertical transverse section of the device with parts dotted in to show the position of the trigger and lever when the hammer is elevated. Fig. 4 is an end view showing the hammer, the setting-tool, and the adjustable rest for the saw. Fig. 5 is a perspective view of the top plate. Fig. 6 is a perspective view of the trigger. Fig. 7 is a perspective view of the anvil. Fig. 8 is a perspective view of the guide-plate, and Fig. 9 is a perspective view of the setting-tool.

1 designates a bed-plate upon which my device is preferably mounted, and 2 a vertical standard or cross-piece having an aperture '3 cut in the center thereof and bridged by the adjustably-mounted top plate 4, said plate being somewhat wider than the crosspiece.

5 designates a block the top of which is brought to the level of the floor of the aperture 3, and on this block is removably mounted a leaf-spring 6, to which is removably secured a hammer-head 7. interposed between the standard 5 and the leaf-spring 6 is a leather cushion 7 which renders the spring less liable to break. A shorter leaf-spring 8 is mounted on top of the spring 6 over the leather cushion for the purpose of distributing the strain away from the point where the screws 9 hold the same in place.

10 designates a setting-tool formed integral with a leaf-spring 1 1, removably mounted on a block 12, the setting-tool being arranged between the hammer 7 and the anvil 13, said anvil being beveled, as shown at 14, which aids in securing the desired gage.

designates a plate having an opening 16, within which the anvil rests, and having two vertical projections 17 formed integral therewith and which are arranged on either side of the anvil and extend somewhat above it and act as a guide for the saw. This plate is adjustably secured by means of the screw 18 and the slot 19, so that when a large saw is used the plate can be pushed in toward the for the teeth and when a smaller saw is used the plate can be pulled outward away from the anvil, so that so much room thereon will not be left for the teeth.

A plate 20 is adjustably mounted on the end of the bed-plate 1, preferably by means of the set-screw 21, the curved slot 22, and the pivoted links 23. One end of each of the links 23 is pivoted on the plate 20, and the other end is pivoted on the bed-plate 1, preferably by screws 24. A kerf 25 is cut in the plate to permit it to drop over one of the screws 24. When a wide set is desired, the set-screw 21 is loosened, and this plate is pushed downward, and'the saw 26, resting on the plate, is carried down with it, so that the teeth on the beveled edge 14 of the anvil are brought into a more acute angle with the head of the anvil, and consequently when struck by the hammer or the setting-tool are anvil in order that there may be more room bent at a more acute angle with the body of the saw and a wider set is obtained. If a narrow set is desired, the plate 20 can be raised to the desired height and there held securely in position by the set-screw 21. When said plate is raised,'the teeth resting on the beveled edge of the anvil are brought into a less acute angle with the top of the anvil, and consequently a narrower gage is obtained.

27 desi nates a foot-treadle pivoted on the sharpened spikes 28, which rest on the floor. Connecting one end of the foot-treadle with the outward end of the lever 28 is a chain 29. The lever 28 is pivotally mounted on the standard 2 and is provided with a stem or pin .30, engaged by a spring 31. The lower end of the trigger 32 is pivotally mounted on the said lever 28, and the upper end thereof is actuated by the spiral spring 33. This trigger passes through an opening 34 in the leaf-spring 6, and the cam 35 on said trigger is adapted to engage the under portion of said leaf-spring. he top plate 4 is provided with slots 36 and is held in place by the set-screws 37, which are disposed within the slots and set in the cross-piece 2, and by means of which the position of the plate may be regulated. The top plate is further provided with an oblong slot 38 near its outer or overhanging edge, and the upper end of the trigger, which is curved, is adapted to pass through and travel within this slot and is held in close contact with the plate at the end of the slot by means of said spiral spring 3-3. When pressure is imparted to the end of the foot-treadle connected with the chain 29, the outward end of the lever 28 is drawn downward and the other end, on which the trigger 32 is pivotally mounted, is raised against the tension of the s ring 31. The upper end of the trigger, w ich, as before stated, is curved, bears against the plate at the end of the slot 38 and is gradually pushed to the right in its ascent and against the tension of the spiral spring 33. The cam 35 being in engagement with the under side of the leaf-spring. 6 forces said spring upward, and thus elevates the hammer which is carried by the end of said leaf-spring. The u per end of the trigger-is thus gradually pus ed to the right until the cam is brought out of engagement with the leaf-s ring 6, causing the spring to descend and the hammer to fall upon the setting-tool 10, beneath which is arranged one of the teeth of the saw 26, as shown in Fig. 1. The force of the blow is regulated thus by said adjustable top plate 4. When said plate is moved to the right, the upper end of the trigger is consequently force more to the right in its ascent than when the plate is moved to the left. When said plate is adjusted to the left, the trigger assumes a more nearly vertical position, and hence when the lever 28 is actuated and the trigger forced upward "the cam 35 is not brought out of engagement with the leafspring 6 until said spring has been raised higher than when the plate 4 is adjusted more to the right. As soon as the pressure on the outer end of said lever 28 is removed the inner end of the lever is forced downward by means of said spring 30 and the pin 31. By keeping one foot on the treadle and alternately imparting pressure to both ends thereof the successive action of the trigger is brought about, and consequently the ham- .mer is kept in constant operation and thespeed thereof is entirely within the control of the operator.-

While a preferred embodiment of my invention has been illustrated, it is obvious that certain modifications of form and arrangement of parts will suggest themselves to the skilled operator and mechanic; but such modifications come well within the spirit and scope of my invention as disclosed and claimed, and I do not, therefore, desire to be restricted or limited to the exact construction and arrangement shown.

In the drawings it will be noted that the hammer-head 7 is made separate from the leaf-spring 6 and secured thereto by screws. The object of this form is to enable the harm Iner-head to be readily and easily removed when worn and a new one substitued; but, if preferred, the hammer-head may be formed integral with the leaf-spring. The leafspring 11 may also be dispensed with by forming the setting-tool 10 integral with the hammer head or by securing it thereto.

The bed-plate 1, upon which my entire device is mounted, may be formed integral with a work bench or table,- or it may be removably secured thereto by screws or other suit= able means.

Having thus described my said invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a setting device, a hammer, a spring? handle therefor, a controllingdever, a trigger pivotally mounted on said lever and having a shoulder to engage with the handle, a plate having a slot therein within which the trigger is arranged to travel, and a spring secured to said plate and arranged to hold the trigger against one wall of the slot whereby the trig ger is caused to disenga e the hammer.-

2. In a saw-setting evice, the combine tion, with a suitable support,- and an anvil carried by said support, of a leaf-spring having one end mounted on the support, a saw settin tool formed integral with the other end 0 said leaf-spring and thereby held sus pended over the anvil, a second leaf spring having one endmounted on the support, a hammer carried by said second leaf spring, and means for automatically raisin and re: leasing said second leaf-spring and amrner.-

3. In a saw-setting device, a hammer, a spring-handle therefor, a controllingdever, a-

spring for returning the lever to its starting position, a trigger pivotally mounted on said lever and having a shoulder engaging with the handle whereby said handle is raised and released, a plate having a slot within which the trigger is arranged to travel, and a spring arranged to hold the trigger against one wall of the slot whereby the trigger is caused to disengage the hammer.

4. In a saw-setting device, an anvil, a sawsetting tool movably mounted above said anvil, a hammer mounted above the saw-setting tool and adapted to engage therewith, a hammer-head, a flexible handle for said hammerhead, a support having one end of said handle rigidly secured thereto, a second support, a lever mounted thereon, a spring actuating said lever, a trigger pivotally mounted on the lever and arranged to operate the handle, a plate adjustably mounted on said second support and having a slot therein within which the upper end of the trigger is arranged to travel, and a spring secured to said plate and arranged to hold said trigger in place.

5. In a saw-setting device, a suitablymounted bed-plate, a vertical cross-piece secured thereto, an anvil secured thereto, a setting-tool movably mounted above the anvil, a hammer-head mounted above the anvil, a flexible handle for said hammer-head, a lever pivoted on the cross-piece, a spring secured to the bed-plate and arranged to control one end of the lever, a trigger pivotally mounted on said lever and arranged to throw the handle into and out of operation, a plate adjustably mounted on said cross-piece and overhanging the same, a slot in said plate within which the upper end of the trigger is arranged to travel, a support rigidly secured to the bed-plate and having one end of the flexible handle rigidly mounted thereon, and a spring secured to said plate and to the upper end of said trigger and adapted to control the same.

6. In a saw-setting device, an anvil mounted on a suitable support, a hammer-head mounted above said anvil, a spring-handle having the hammer-head secured to one end thereof, a rigid support having the other end of the handle mounted thereon, a second support, a lever pivotally mounted on said second support, a spring controlling one end of the lever, a trigger pivotally mounted on said lever and adapted to raise and release the handle, a plate adjustably mounted on the top of said second support and having a slot therein within which the upper end of the trigger is arranged to travel, a spring secured to said plate and arranged to control the upper end of said trigger, and means for actuating said lever.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

SAMUEL L. HAWN.

Witnesses:

HENRY A. DRUMM, E. E. BEoKErT.

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