US98447A

US98447A - Improvement in gauge for filing sawh

Info

Publication number: US98447A
Authority: US
Publication date: 1869-12-28
Anticipated expiration: 1886-12-28

Description

waited tat l ,gaten-t @titte oLIvn'R 'rYso-N,

or oTHo, 10W-A.

Letters Patent N 98,447, dated Deoember 28, 1869.

moa-

The Schedule referred to in these Letters Patent and making part of chez same. I

and I do hereby declare that the following is a full' land exact description of the same, reference being had to the accompanying drawings, and to the letters v of reference marked thereon.

This invention relates to an improved gauge for use in filing saws; and

It consists mainly in the employment of rollers, at#

.tached to asnitable frame, by means of which the operation of the file is limited to a certain point.

It further consists also in various details of construction, by means of which the rollers and other Vparts are adjusted to suit diiereut saws.

The details of construction, and method of opera.- tion will be fully described hereinafter. i In the drawings- Figure lis a perspective view of my invention, and

Figure 2 is a side elevation. y

lo enable othersskilled in the art to make and use my invention, l will now proceed to describe fully itsv construction and operation.

A represents a casting, which consists essentially of the extension a and bent arms a), united by the bar ai.

By `the arrangement of parts shown, a frame is formed in which the saw is held during the operation of filing.

B B representrollers turning in slotted bearings b b, upon each side of the' frame A, as shown. These bearings are secured to the frame by means of thumbscrews, which pass through the slots and enter suitable orilices in the frame A.

To permit greater adjustment than would be'possible by means of the shits in the bearings alone, I make other orifices in the frame at proper points, into' which the thumb-screws may be shifted when desired.

C represents a bearing-bar, located upon the inside of the bar a2, which is sustainedin place by means of pins c', extending through the bar a2, and which is actuated in a parallel plane by means of the screw c, as shown.

`D represents a latch, provided with the projection d, which is pivoted to the inside of one of the arms 3l, as shown.

The extension a is provided with a bolt and thumbscrew, by means of which it is secured to the slotted standard eof base E.

`'Theoperation of my invention will be easily under-A stood.

The base E is secured to the saw-frame or table .in

any suitable manner. The saw is enclosed by the.-

frame, and the latter is adjusted on the standard at the required angle to suitthe shape of the teeth. The bearing-bar O is then advanced by the screw c, until the saw is firmly clamped. The latch falls down over the teeth as soon as the saw is moved to the proper position for filing. The rollers should now be so adjusted that their upper edges shall be in line with the deepest point or line to be filed. It necessarily follows, therefore, that when this point is reached, the

file will operate no longer, but will bear upon the rollers.

By this device all the teeth of a saw may be uniformly tiled, it being, in fact,impossible to make a mis- A take.- It is simple in all its parts, and yet is adapted .frame A, rollers B, bearingbar 0,*and latch D, when combined as and for the purpose described.

'.lhis specification signed and witnessed, this 5th day of August, 1869. y

OLIVER T YSON.

Witnesses: I y

- H. BEECHER,

'THOMAS O. GONNELL.