Guides for Saw Filing or Sharpening and Ranging.
Year: 1889

page_text: Date of Application, 10th July, 1889
Complete Specification Left, 24th Oct., 1889-Accepted, 30th Nov.,
1889
PROVISIONAL SPECIFICATION.
Guides for Saw Filing or Sharpening and Ranging.
I HENRY THOMAS BURFORD of 16, Muntz Street, Smallheath, in the City of
Birmingham, Coal Merchant, do hereby declare the nature of my invention for.
GUIDES FOR SAW FILING OR SHARPENING AND RANGING to be as follows:-
The object of my invention is to facilitate the sharpening and ranging of carpenters'
and other saws in a regular and accurate manner.
I propose to accomplish this by the construction of a gauge or guide consisting of
a frame fitted with metal or other rollers and arranged according to the pattern of the
teeth to be filed. The said rollers may be constructed of a conical or other shape to
accord with the teeth of saw or the said frame may he arranged to suit the shape of
the said teeth and be fitted with parallel rollers. A guide might be constructed to
cover several teeth at a time and it would be set back from the existing face of teeth
the precise distance that the teeth require taken off them. By filing each tooth until
the rollers of guide are touched by the file it will be comparatively easy to get each
tooth equal in size. The guide would be fixed on saw by clamps or other means
and fitted with screws or other suitable arrangement for raising, lowering or
adjusting.
COMPLETE SPECIFICATION.
Guides for Saw Filing or Sharpening and Ranging.
I HENRY THOMAS BURFORD of 16, Muntz Street in the City of Birmingham, Coal
Merchant do hereby declare the nature of my invention for GUIDES FOR SAW FILING
OR SHARPENING AND RANGING and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement :-
The object of my invention is to facilitate the sharpening and ranging of carpenters
and other saws or similar tools in a regular and accurate manner.
For this purpose I propose using a gauge or guide consisting of a frame fitted with
metal or other rollers arranged according to the pattern of the teeth to be filed.
Fig. 1. shews a plan of one arrangement for this purpose. a. shews the saw in position
for sharpening, b. b. are portions of a clamp holding the saw, and c. c. are rollers for
guiding the file. These rollers practically consist of a series of cones adapted to the
teeth of the saw, a large cone alternating with a smaller one so as to throw the file
out of the horizontal. When a saw is placed in position between the rollers (c. c.)
and adjusted according to the maximum amount required to be taken off the teeth it
will be easy for a workman, by filing to the guides to get the teeth regular and equal
in size.
Another arrangement is shewn in elevation in Fig. 2. This consists of a frame of
wire or other material a. having rollers b. fitted upon it for guiding the file. One of
these frames is placed on each side of the saw to be sharpened. Both frames exactly
correspond in shape and position but in using them for filing the operator would
place his file at an angle, resting it in the position c. on the one guide and in the
position d. on the other so that the file shall deviate both from the horizontal and
from right angles to the saw and produce what is known as the "lance" pointed
tooth.
The above described arrangements may be modified and altered in many ways to
suit the various kinds of saws requiring to be treated, or they may be varied in
constructive details without deviating from the general principle so that it must be

page_text: distinctly understood that I do not in any way limit myself to the precise details of
the arrangements described in this Specification or shewn on the accompanying
drawings.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. The guide for filing or sharpening saws substantially as herein described and
shewn on Fig. 1. of drawings.
2. The guide for filing or sharpening saws substantially as herein described and
shewn on Fig. 2. of drawings.
3. The use of rollers or roller guides of any form or arrangement for guiding files
in sharpening and ranging saws so as to keep the teeth equal in size.
Dated this 30th day of September 1889.
HENRY THOS. BURFORD.