US1172951A - Saw-clamp. - Google Patents

Description

J. H. DALLlS.

SAW CLAMP.

APPLICATION FILED JAN.2I, 1914.

' Patented Feb. 22,1916.

Tm: com-1mm PLANDGRAPH co., WASHINGTON, l) c.

JAMES H. DALLIS, OF PHILADELPHIA, MISSISSIPPI.

SAW-CLAMP.

Specification of Letters Patent.

Patented Feb. 22, 1916.

Application filed January 21, 1914. Serial No. 813,451.

To all whom it may concern:

Be it known that 1, JAMES H. DALLIs, a citizen of the United States, residing at Philadelphia, in the county of Neshoba and State of Mississippi, have invented certain new and useful Improvements in Saw- Clamps; and I do hereby 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.

My invention relates to new and useful improvements in saw clamps and resides in the provision of a novelly constructed clamp that is simple as to construction, reliable and efficient in operation and cheap to manufacture.

An important object of my invention is to provide a device of the character described which consists of cooperating clamping jaws that are normally held in spaced relation to each other by novel means forming a part of the invention and adapted to be moved into clamping engagement with a saw and held in that position by means forming a part of the invention.

7 The above and additional objects are accomplished by such means as are illustrated in the accompanying drawings, described in the following specification and then more particularly pointed outin the claims which are appended hereto and forma part of this application.

With reference to the drawings, wherein I have illustrated the preferred embodiment of my invention as it is reduced to practice, and throughout the several views of which similar reference numerals designate corresponding parts, Figure 1 is a front elevation illustrating my device as it would appear in assembled position, Fig. 2 is a side elevation, Fig. 3 is a vertical sectional view taken on line 3-3 of Fig. 1, Fig. 4: is a sectional view taken on line 4-4: of Fig. 2 showing the detail arrangement of the supporting rollers, Fig. 5 is a sectional view taken on line 55 of Fig. 2 showing the position of the roller supporting frame relative to the support therefor, and Fig. 6 is a detail perspective view of the fixed jaw of the table or support clamping means.

Referring to the drawings the numerals l and 2 designate cooperating clamping jaws that are provided with flat opposed faces adapted to clamp a saw. The jaws 1 and 2 are reduced from their central portion to the ends thereof and are formed in the nature of elongated plates having parallel outer edges and scalloped inner edges.

Secured centrally of the ends of the jaw 2 uponthe outer face thereof is a supporting armB having its upper terminal recessed and securely fixed or formed integral with the jaw 2. This bar 3 extends outwardly from the jaw 2 and supports at its free outer terminal a supporting plate or bar 4. A metal band 5 is secured upon the reduced end of the bar 3 and intermediate its ends is secured by suitable fastening means to the plate 4:. The upper portion of the plate 4: is offset as at 6 to sufficiently space the same from the member 3 which is approxi mately diametrically opposite. The portion 6 is longitudinally slotted from its upper end so as to receive the intermediate portion of a jaw handle or lever 7. A. pivot pin 8 is inserted through the upper portion of the offset portion 6 and the intermediate portion of the handle or lever 7. The lever 7 is enlarged at its upper end as at 9 and secured by suitable fastening means 10 to the central portion of the jaw 1. The lever 7 is reduced centrally of its ends as at 11 to facilitate the pivotal connection above described. The other end of this lever 7 is enlarged as at 12 and apertured to receive an adjusting screw 13 provided with a handle portion 11. The adjusting screw 13 is inserted through the aperture adjacent the end of the enlarged portion 12 of the lever 7 and has bearing engagement with the adjacent face of the member 1 which is opposite the enlarged'portion 12. A helical retractile spring 15 is secured at its terminals to the ends of the bars 7 and 4 and serves to normally hold the jaws 1 and 2 in open inoperative position. The jaw 2 is provided adjacent each end upon its outer face with supporting bars 16 each having an integral or otherwise suitably secured parallel arm 17 carried at one terminal adjacent the outer end of the arm 16 and having its free terminal spaced from the inner edge of the adjacent jaw. The arms 17 are spaced from the arms 16 and are longitudinally grooved in their opposed faces as at 18 to receive the sliding roller supporting block 19 which is approximately U-shaped and has a roller 20 journaled therein. This roller 20 is disposed for engagement with the rear edge of a saw blade and is adjustable by means of adjusting screws 21 threaded through the the members 16 are table or support engaging clamps consisting of a fixed jaw 24 secured at the end of the arms 16 and a similar U-shaped jaw 25 secured in a recess in the arms 16. A screw clamp 26 is threaded through the jaw 24 cooperating with the U-shaped jaw 25. The screw clamp 26 consists of a head portion 27 acting as a jaw,

a screw threaded shank 28 threaded through the jaw 24 and a handle portion 29. The screw clamp 26 and U-shaped jaw 25 are adapted to grip the edge of a table, work bench or other support for the purpose of securing the saw clamp in the proper position relative to clamping a saw.

It will be readily seen with reference'to the foregoing description and accompanying drawings that to clamp the saw, the

saw is placed between the jaws 1 and 2 so that its rear edge is disposed in engagement with the rollers 20. The rollers may be adjusted to provide for the disposal of the toothed edge of the saw as desired with relation to the outer edges of the jaws 1 and 2. The handle member 141 is operated to bring the jaws into cooperative clamping engagement with the saw and the saw is then ready to be filed or otherwise operated upon.

The most important object of the invention is the cheapness with which the device may be constructed in combination with the efiicient operation provided.

. In reduction to practice, I haverfound that the form of my invention, illustrated in the drawings and referred to in the above description, as the preferred embodiment is the most efficient and practical; yet realizing that the conditions concurrent with the adoption of my device will necessarily vary, I desire to emphasize the fact that various minor changes in details of construction, proportion and arrangement of parts may be resorted to, when required, without sacrificing any of the advantages of my invention, as defined in the appended claims.

What is claimed is 1. A saw clamp comprising spaced pairs of supporting arms, the arms forming each pair being arranged in spaced relation to each other and having their opposed faces provided with longitudinal grooves, cooperatingclamping jaws located at the upper ends of the arms, means for operating said jaws, roller supporting blocks slidably mounted in the grooves formed in the opposed faces of each pair of arms, and vertically disposed adjusting screws located between the arms forming each pair, and connected to the blocks, and adapted when adjusted to eflect a simultaneous adjustment of the blocks.

2. A saw clamp comprising spaced pairs of supporting arms, the arms forming each pair being of unequal lengths and arranged in spaced relation, a fixedjaw secured to the longer arm of each pair, a vertically di posed operating lever pivoted to the shorter arm of one pair, a companion jaw carried by the upper end of the lever and an operating screw adjustable through end of the lever and against the adjacent arm, and a spring having one end connect ed to the lower end of the lever and its opposite end connected to the adjacent arm, for the purpose specified.

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

JAMES H. DALLIS.

WVitnesses:

L. J. OATLEDGE,

M. O. POVY.

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

- Washington, D. C.

the lower

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