An Improved Saw Sharpening Device.
Year: 1893

page_text: Date of Application, 17th Aug., 1893
Complete Specification Left, 1st Mar.. 1891-Accepted, 7th Apr., 1894
PROVISIONAL SPECIFICATION.
An Improved Saw Sharpening Device.
We, MARVEL DAYTON MINER, Carpenter and Saw Filer, and CHARLES
PACKERT CLARK MINER, Produce Dealer and Farmer, the former of Leyden
and the latter of Charlemont both in the State of Massachusetts, United States
of America, do hereby declare the nature of this invention to be as follows
--
1
The saw sharpening device of this invention consists of a three part frame
folding up on hinges and provided at top with clamping jaws for holding a saw to
be sharpened. The jaws are closed against the saw and opened by means of a cam
shaft journalled in the frame, the cam part acting against downward extensions of
the jaws. One of the jaws carries by a ball or other joint a file frame in which the
This
file may be held, adjusted and worked to and fro for sharpening the saw.
frame consists of an arm leading from the clamping jaw to a sleeve which serves as
à guide and carrier for a rod working in it and carrying the saw file, the rod being
worked from a handle at the opposite end of the rod. The file is held by its ends
in carriers adjustable on the rod by means of set screws. The clamping jaws may
be provided with grooves on their outer surface to serve as guides for the lower
edge of the file. The saw may be reversed without removal by shifting the legs or
parts of the frame and the file may be correspondingly reversed by turning its
frame round on the joint.
Dated this 17th day of August 1893.
-
THOMAS R. SHILLITO,
89, Chancery Lane, London, W.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
An Improved Saw Sharpening Device.
Ji
i
We, MARVEL DAYTON MINER, Carpenter and Saw Filer, and CHARLES
PACKERT CLARK MINER, Produce Dealer and Farmer, the former of Leyden
and the latter of Charlemont, both in the State of Massachusetts, United States
of America do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention has for object to provide a saw sharpening device of simple
construction which will hold the blade of the saw firmly and which can be readily
reversed to enable the operator to work on both sides of the saw without removing
the same from the clamp, also to provide an improved file holder that can be easily
moved longitudinally of the clamp and adjusted at any desired angle as the saw is
being sharpened.
In the drawing
Fig. 1 is an end elevation of the device of this invention;

page_text: ig. 3 a sectional view on line - of Fig.
Fig. 4 a detail view.
A is a central frame and B, B', two side frames forming the body of the device.
The central frame A consists of two parallel legs a which are connected and braced
by any desired number of cross bars a'. The side frames B, B', are each composed
of two parallel legs or supports connected and braced by one or more cross
pieces, and the legs or supports b are connected at their upper ends, preferably
by means of hinges C to the legs of the central frame so that when not in use the
frames can be folded up and the device stored in a small space. The side
frames B, B', are connected and strengthened, when separated or adjusted apart
from the central frame, by links 62. The legs a of the central frame are slightly
longer than the legs of the side frames so that when either of the latter is moved
away from the central frame and the legs rest on the floor, the central frame will
be inclined in the opposite direction thereto, as shewn in the drawing.
A series of parallel levers or arms D are pivotally connected at an intermediate
point of their length to the upper cross bar a' of the central frame A, being
arranged in pairs on opposite sides of the cross bar with their upper ends rigidly
attached to the jaws E of the saw clamp.
In the legs of the central frame A below the upper cross bar a¹ thereof, is
journalied a transverse shaft F extending between the pairs of levers D parallel to
the cross bar a and provided with a suitable handle or crank G for turning the
same. Shaft F is oval in cross section as shewn in Fig. 2, so that as it is turned
to bring its longest diameter at right angles to the length of levers D the lower
ends of these on opposite sides of the bar a' will be forced apart and the jaws E
carried at the upper ends thereof will be forced closely together to clamp or hold a
saw placed between them.
The jaws E are provided on their outer face with longitudinal grooves or ways H
and on the same faces on opposite sides of the grooves are fixed by screws or other
suitable means metal plates I the inner edges of which project slightly over said
grooves so as to form a slide bed along which a socket K having a suitable slide
extension may be moved. L is a ball provided at the end of an arm N and
adapted to work in the socket K and to be fixed therein by means of a set screw O.
At the outer end of arm N there is pivotally mounted a sleeve P through which
extends a rod Q provided at one end with a handle R and at the other end with a
removable enlarged head q, and capable of being turned round in sleeve P.
(Fig. 3) is a longitudinal groove to allow of fixing by means of set screws U the
file holders S at the desired distance apart upon rod Q. T is a file held in the
two file holders. V is a collar mounted upon sleeve P and furnished with a set
screw W for screwing against and fixing rod Q in any desired position according
to the position required for the file T and thus adapt it to sharpen teeth of varying
pitch.
the saw.
The device operates as follows:-The saw to be sharpened is inserted between
the jaws E, and the transverse shaft F turned to bring its longèst diameter at right
angles to the length of levers D and thus force the jaws firmly against the blade of
The arm N is then turned in its bearing so as to bring the file in the
proper position relatively to the saw blade whereupon the arm is fixed by screw O.
Rod Q is then reciprocated longitudinally and the file T thereby caused to quickly
sharpen the tooth of the saw with which it comes in contact. Socket K is moved
along the groove H until all the teeth have been sharpened on one side. The
device is then reversed by swinging the central frame A against the side frame
which was previously extended. This causes the jaws and saw blade between them
to extend in a direction opposite to that previously occupied by them. The
socket K is moved longitudinally of the jaw until it reaches the end of the bed on
which it travels and then withdrawn and placed in the bed in the other jaw and
the teeth on that side sharpened. The jaws are preferably provided on their
outer faces with a series of grooves which serve as guides for the lower edge of
the file.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The general arrangement, construction and combination of parts constituting the
saw sharpening device, substantially as described and shewn.
Dated this 1st day of March 1894.
THOMAS R. SHILLITO,
89, Chancery Lane, London, W.C., Agent for the Applicants.