US1036195A - Saw-set. - Google Patents

Description

G. H. DAVENPORT;

SAW SET.

APPLICATION FILED APR. 15, 1912..

COLUMBIA FMNOGRAFH CO. WASHINGTON, D C.

G. H. DAVENPORT.

SAW SET.

APPLICATION FILED APR. 15, 1912.

1,036,195, Patented Aug. 20, 1912.

2 SHEETS-SHEET 2.

avwamtoz Witweooeo Y COLUMBIA PLANadRAPl-l cm, WASHINGTON. D. c.

anvil blocks.

QHARLES HARRIS DAVENPORT, OF ELK PARK, NORTH CAROLINA, ASSIGNOR TO 0. D. HAMRICK AND F. J. KING, BOTH OF ELK PARK, NORTH CAROLINA.

SAW-SET.

Specification of Letters Patent.

Application filed April 15, 1912. Serial No. 690,771.

To all whom it may concern.

Be it known that I, CHARLES HARRIS DAVENPORT, a citizen of the United States, residing at Elk Park, in the county of Mitchell and State of North Carolina, have invented certain new and useful Improvements in Saw- Sets; 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.

This invention relates to improvements in saw sets.

One object of the invention is to provide a saw set having an improved construction and arrangement of setting mechanism whereby two teeth of the saw will be simultaneously upset in opposite directions and to exactly the same distance and having means whereby the extent of the set of the teeth may be regulated.

Another object is to provide a saw set having an improved means for clamplng the device in position on the saw and means for changing the gage of the setting mechanism.

A further object is to provide a saw set which will be simple, strong, and durable in construction, eflicient and reliable in operation and well adapted to the purpose for which it is designed.

WVith these and other objects in view, the invention consists of certain novel features of construction, and the combination and arrangement of parts as will be more fully described and claimed. I

In the accompanying drawings; Flgure 1 is a side view of my improved saw; Fig. 2 is a top plan view thereof; Fig. 3 is a vertical longitudinal section taken on the line 8-8 of Fig. 2; Fig. 4 is a vertical cross section taken on the line 4-4 of Fig. 1; Fig. 5 1s a horizontal section taken on the line 5-5 of Fig. 1; Fig. 6 is a perspective view of the supporting frame or casing forthe die or My improved saw set comprises a central anvil supporting frame or casing 1 which is of rectangular form and is closed on its lower side as shown. In the bottom and sides of the frame is a saw receiving slot 2 with which the blade of the saw is engaged when the device is placed inposition thereon. on the ends of the frame or casing 1 are formed channel shaped plunger supporting bars 3 on the ends of which are formed the lower stationary members 4 of a pair of plunger operating handles the upper members 6 of which are pivotally connected at their inner ends to the outer ends of the bars 3 as shown. On the inner ends of the pivoted members 6 of the handles are formed cam projections or offsets 7 which are adapted to engage the outer ends of plunger rods as will be hereinafter more fully described.

Arranged in the frame 'or casing 1 are die or anvil blocks 8 and 9 against which the teeth of the saw are upset. The blocks 8 and 9 have their upper ends curved or beveled outwardly on their inner sides to form the inclined surfaces against which the saw teeth are upset, and in said blocks are formed transverse passages 10 with which are engaged the inner reduced ends of setting plungers 11 which are disposed in the channel shaped bars 3 of the frame 1 and are slidably engaged with apertures formed in the adjacent ends of the frame and with apertures formed in guide plates 12 arranged in the bars 3 as shown. The outer ends of the plunger rods when thus arranged are in position to be engaged by the cam projections or ofisets 7 on the inner ends of the plunger operating members 5 of the handles as shown. The plungers 11 are retracted after'each operation thereof by the handle members 5 and are held in their retracted positions by coiled springs 13 arranged on the plungers between the ends of the frame and a stop pin 14 arranged through the plungers as shown.

The anvil block 9 is of substantially the same width as the space between the sides of the frame 1, while the block 8 is of less width than said space, and'said block 8 is adapted to be adjusted laterally in one direction or the other to bring the passage therein and the end of the plunger engaged with said passage nearer to or farther away block 8. The movement of the block 8 is effected by means of adjusting screws 15 one of which has a threaded engagement with each side of the frame 1 and has its inner end engaged with the adjacent side of the block so that by screwing one of the screws inwardly and the other outwardly the block 8 may be shifted in the desired direction to adjust the inner end. of the plunger rod engaged therewith with respect to the inner end of the plunger rod engaged with the opposing block 9.

The block 9 has onits ends pairs of laterally projectingguide pins 16 which are slidably engaged with pairs of horizontally disposed slots 17 in the opposite sides of the frame 1, and said block 9 is adapted to be shifted in the frame to clamp the saw between the blocks by means of clamping screws 18 which have a threaded engagement with one end of the frame and have their inner ends engaged with the outer side of the block 9 whereby when the screws are turned inwardly, said block will be brought into engagement with the adjacent side of the saw and the latter thereby clamped against the inner side of the opposing block 8.

In order to gage or adjust the set of the teeth by the inner ends of the plunger rods,

I provide stop screws 19 which have a threaded engagement with the upper ends of the sidesof the frame 1 and have their lower ends projecting into the upper ends of the slot 2 in said sides whereby the distance at which the blade of the saw is permitted to enter the slot is regulated by the engagement of the ends of the screw with the points of the saw teeth. By thus arranging j the screws 19 it will be seen that when the device is applied to the saw, the teeth will be permitted to project more or less above the lower side of the inner ends of the plungers or, in other words, the teeth will be ex- V posed to a greater or less extent to the action of the ends of the plungers when forced into engagement therewith thus causing the plungersto upset the teeth to a greater or less extent according to the position at which said ends of the plungers engage the teeth.

In the operation of the device the slot 2 in the frame 1 is engaged with the saw blade and the frame lowered on the blade until the ends of the screws 19 come into engagel, the clamping screws'18 are tightened up to grip the saw between the blocks as hereinbefore described. After the saw has thus been gripped the handle members are grasped and the upper member forced downwardly toward the lower member thereby causing the offset or camprojections on i the inner ends of said handles toengage the outer ends of the plunger rods thereby forcing the plungers inwardly against the pressure of their retracting springs. This operation of the plungers will project the reduced inner ends thereof through the passages in the blocks 8 and 9 and against'the opposite sides of the twovadjacent teeth thereby upsetting one of said teeth in one direction .against the beveled surface of one of the anvil blocks and the other tooth in the opposite direction against the beveled surface of the opposing block, thus setting the teeth to the same distance as will be readily understood. The reduced tooth engaging ends of the plungers are preferably of triangular shape to correspond with the triangular shape of the saw teeth and the extremities of said reduced ends are formed on an angle as shown.

From the foregolngdescription taken 1n connection with the accompanying draw- 1. In asaw set, a central supportingframe, plunger supporting bars arranged thereon, stationary handles projecting from said bars, plunger projecting handles pivot-" ally connected to said bars, tooth setting plungers slidably mounted in said bars, and adapted to be projected by said pivoted handles, anvil blocks arranged in said frame and having their inner upper surfaces beveled or inclined in opposite directions and having therein transversely disposed plunger receiving passages, block adjusting screws arranged in one side of said frame and having their innerends engaged with the outer side of one of said pluuger'blocks whereby the latter is adjusted to clamp a saw blade bet-ween the same and the opposing block.

2. In a saw set, a central supporting frame having therein a vertical saw receiving slot and having in its sides horizontal guide slots, plunger supporting. bars arranged on the ends of said frame, station ary handles on the ends of said bars, plunger projecting handles pivotally connected to the bars, spring retracted plungers having reduced tooth engaging inner ends, anvil blocks arranged in said frame and having therein transverse plunger receiving pas sages, guide pins arranged on the ends of one of said blocks and havingasliding-engagement with'the guide slots in said frame, block adjusting screws having a threaded.

engagement with one end of the frame and having their inner ends engaged with said block whereby the latter is adjusted to clamp a saw blade between the same and the opposing block, and means whereby the 0pposing block is adjusted to regulate the distance between the inner ends of the plungers engaged with the passages in the blocks to set difierent sizes of saw teeth.

3. In a saw set, a central supporting frame, plunger supporting bars arranged on and projecting from said frame, stationary handles on the ends of said bars, plunger operating handles pivotally connected to the latter, anvil blocks arranged in said frame and having therein plunger receiving passages, spring retracted plungers slidably mounted in said bars and having their inner ends engaged with the passages in said anvil blocks, plunger projecting offsets on said plunger operating handles to project said plungers through said anvil blocks and into engagement with the teeth of the saw engaged between the blocks, means whereby one of said blocks is adjusted to bring the end of the plunger engaged therewith nearer to or farther from the end of the plunger engaged with the opposing block, and means to adjust the other block whereby the blade of the saw is clamped and held in position between said blocks.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

4. In a saw set a central supporting frame having therein a saw receiving slot, plunger supporting bars arranged on the ends thereof, stationary handles on said bars, plunger projecting handles pivot-ally connected to the latter, plungers slidably mounted in said bars, anvil blocks arranged in said frame and having therethrough plunger receiving passages, one of said blocks being of less width than the width of the frame, means whereby said block is adjusted to vary the distance between the plunger receiving passage therein and the plunger receiving passage on the opposing block whereby the ends of the plungers are spaced a greater or less distance apart for setting teeth of different size and gage screws arranged in the upper edges of the sides of said frame and having their inner ends projecting into the upper ends of said saw receiving slot whereby the engagement of the frame with the saw blade is regulated and the set of the saw teeth by the inner ends of the plungers is gaged.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHARLES HARRIS DAVENPORT.

Witnesses:

GEO. H. TRIVETT, OSSIE D. HAMRICK.

Washington, D. 0.

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