Improvements in Automatic Saw Setting and Sharpening Machines.
Year: 1885

page_text: Improvements in Automatic Saw Setting and Sharpening
Machines.
JOHN ANDERSON 38 Elswick Row Newcastle upon Tyne Machine Maker
I do hereby declare the nature of my invention for AUTOMATIC SAW SETTING
AND SHARPENING and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
This which relates to the mode of Setting and Sharpening each alternate tooth
in oposite directions or with the sett in one operation, thus giving the perfectly true
and even Cutting edge so essential to good results in Bandsaw Cutting, may be
thus described. The saw is placed into the vice provided with adjustable sett
anvils and hammers. In a transverse position over the vice are two paralel shafts
each holding a file to operate in oposite directions with an easy forward motion on
the teeth of the saw, while the saw is held firmly in the vice, the setthammers
operating at the same time To repeat the operation the vice opens, the files are
raised and return with a quick motion and the saw propelled forward. The whole
is directed by suitable Cams and levers and springs. This machine will take the
smallest or largest saws also small or large files.
I will now proceed to explain my said Invention more in detail by the aid of
the accompanying drawings, reference being had to the letters and figures marked
thereon.
Figure 1. is a side elevation on line 1-2, shewing the working parts connected
with the files. The automatic Vice and the Gauge.
Figure 2 is side view shewing parts of feed, and setting arrangement. Figure 3
is a plan showing parts of feed and rocking arm with position of shafts carrying
the files.
Figure 4. is an end vew shewing feedbar and pawl and position of saw and sett
arrangement.
In figures 1. 2 and 3 A is the driving shaft, on one end of which is fixed the
driving pully (not shown) This shaft is supported in suitable bearings, and has
fixed on it the Cams J, and S, and Crank arm with rooler B.
C. is a female Cam pivoted at top to the side of the frame, and has a V grove in
one side indicated by dotted line M. to which is attached by the link E. 1. the
Crossliead D. and it is connected by links E. 2. to the levers E. pivoted on shaft F.
and top ends connected by Rods G. to the paralel shafts H on which are adjustable
Grips E. 3. one of which is fitted with a socket D. 1 to receive the file tang and the
other with screw E. 4. having a Centre in which the file is held, and capable of
being adjusted to the angle of the teeth. The said paralel shafts work in sockets E. 5,
one of which is situated immediatly above the vice in sockets X.1 to allow of
vertical motion and pressed down by springs X. 2. so as to allow elastic pressure to
the files. The nut G. 1 çan be slackened and the arm P. with the files raised to
allow a broad saw to be put into and taken out of the machine. The set pin H. 1
forms a stop to ensure a uniform edge on the saw. When in operation the saw is
received into the vice I. and held by means of lip O. and lever L pressed by spring N.

page_text: while the files perform the forward motion, and at the end of the stroke, Câm J.
comes into contact with rooler K. raising the arm L. opens the vice. At the same
time Arin P. pivoted at R is raised by means of connecting link g and so lifting
the files clear from the Saw, and rooler B. coming into the upper part of Cam C.
causes the files to return with a quick motion. At the same time Cam S. lifting
one end of lever T. the other end acting on Bell Crank U, and it acting on feed bar V.
and pawl W. moves the saw forward. The required distance being regulated by
screw X and check nut Y. The setting is performed by the hammers or punches A. 1
and levers Z. pivoted on shaft V. 1 and connected by links B. 1. to T lever A. 2
held up by spring T.1 and pivoted at B. 2. and pressed by Cam S. in its revolution
giving the saw the required sett, being regulated by screws B. 3. The Gauge D. 1
connected to lever D. 2 pivoted at D. 3 and adjusted by screw D. 4. to the different
width of saws.
Having now particularly ascertained and described the nature and object of my
said Invention together with the mode of carrying the same into effect, I wish it
to be understood that I claim as my Invention
Firstly. All the mechanism for imparting simultaneous motion to the two files.
Secondly. The combination for setting, substantially as and in the manner shewn
upon the accompanying drawing, and as described in the above Specification, or
any mere modification thereof.