An Improved Saw Setting and Filing Device.
Year: 1891

page_text: Date of Application, 29th Aug., 1891
Complete Specification Left, 30th May, 1892-Accepted, 29th Aug., 1892
PROVISIONAL SPECIFICATION.
An Improved Saw Setting and Filing Device.
I, WILLIAM WILSON HORN of the firm of Horn and Son of 151, Strand in
the County of Middlesex, Patent Agent, do hereby declare the nature of this
invention, a communication from Carle A. Erlandson of San Francisco State of
California, United States of America, Inventor to be as follows:-
This my invention relates to an improved saw setting and filing device and it
consists in the arrangement construction and combination of parts hereinafter
described and set forth.
My invention consists of an apparatus having suitable jaws for holding the saw
and guiding the same, hinged adjustable guides projecting above the saw, and
slides mounted in the said guides, the said slides carrying files or other sharpening
tools. The said slides are caused to reciprocate in a horizontal plane by means
of connecting rods attached to suitable cranks from the driving shaft of the
machine. The files are pressed down by suitable springs during their forward
motion and raised by a suitable cam as the slides recede.
The files are adjusted by means of screws to regulate the position of the files to
the teeth of the saw.
After the file has operated upon the tooth the saw is advanced by an arrange-
ment of a pawl, crank arms, and cam mechanism, the space of a single tooth, so
that the adjacent tooth is sharpened by the next stroke of the file, the throw of
the pawl being adjustable, so as to control the forward movement of the saw.
As the teeth recede from the filing portion of the machine, they pass between
setting blocks having inclined opposing faces, the setting pins therein having
bevelled ends adapted to engage the teeth of the saw when they stand opposite to
the pins. The setting pins are operated by means of an arrangement of levers
which are also adapted so that the setting of the teeth and the filing proceed
simultaneously, the saw being released from both at the same time and moved
forward as before described.
Dated this 90th day of August 1891.
HORN & SON,
Applicant's Agents.
COMPLETE SPECIFICATION.
An Improved Saw Setting and Filing Device.
I WILLIAM WILSON HORN of the firm of Horn & Son of 151 Strand in the
County of Middlesex Patent Agent do hereby declare the nature of this invention
a communication to me from Earle A. Erlandson of San Francisco in the State of
California United States of America Inventor and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
My invention relates to an improved machine for setting and filing saws.
It consists in certain details of construction, which will be more fully explained
by reference to the accompanying drawings in which—
Fig. 1. is a perspective view of my machine, the files and guides being thrown
back.
Fig. 2 is a plan view of the saw supporting and setting part of the machine.
Fig. 3 is a side elevation of the same, the parts being shown in working

page_text: A is the bed plate, having upon one side of it the standards B with suitable
journal-boxes in which turns a shaft C. Power may be applied to rotate this
shaft by means of pulley, gear or other suitable attachment, and through the
rotation of this shaft the devices necessary for the work will be operated. Upou
one end of tho shaft is a crank wheel D, carrying a crank pin E. and connecting
rods F from this crank pin are made to hook over pins upon the slides G, which
reciprocate upon the guides H. The slides G have arched yokes I extending
downwardly from them, and these yokes are adapted to receive and hold the files J,
by which the teeth of the saw are to be filed. In the present case I have shown
two of these sliding file-holders, and the files are set in them, so that one cuts in
one direction and the other in the opposite direction. Beneath the line of these
files and at the opposite side of the bed-plate from the crank shaft C are fitted
the guiding jaws K, in which the saw plate is placed with the teeth uppermost.
Karc posts or supports upon which the back of the saw rests, and these posts are
adjusted up or down to suit the taper of the saw blade, and so that the toothed
edge will be horizontal. The posts K¹ are secured, when adjusted, by set screws K².
The saw is so arranged with relation to the files that the latter may be drawn
across the teeth of the saw as they are caused to reciprocate by the motion of the
crank shaft, as before described.
In order to adjust the guides so that the files will fit saw teeth of any size,
the rear ends of the arms carrying the guides are hinged to swivel-sockets, as
shown at L, and these sockets have screws M passing through them horizontally,
so that by turning the screws the sockets may be moved-uearer to or farther from
cach other, and by this movement the guides, the slides, and the files will be
correspondingly moved. This connection also enables the operator to lift up
and disconnect either or both of the file guides and their operating arm,
As each file is intended to cut in one direction only, it is necessary to raise the
file after it has made its cut, so that it will be drawn back out of contact with
the saw.
This is effected by means of crank arms N, fixed upon shafts O, which
are journaled upon the bed plate, and other lover arms P are fixed to these shafts
and extend beneath the driving-shaft C, so as to be alternately engaged by
cams Q, which are fixed upon said shaft, and when the shaft is rotated one of these
cams will operate its connected lever so as to raise one of the files, while the other
is moving forward to make its cut, and then the file which has made the cut will
be raised while it is being drawn back and the other will be allowed to descend so
as to make its cut.
In order to move the saw forward after each cut, I have shown a pawl R, the
point of which engages the teeth of the saw, so as to push the saw forward
sufficiently to present new teeth for the operation of the files. This pawl is
connected with a rocking plate S, and the rocking plate is operated by levers T
and a cam or eccentric U upon the main shaft. In order to adjust the throw of
this rocking plate and the pawl, the plate is slotted and the fulcrum-pin of the
pawl is adjustable in the slot, so that it may stand nearer to or farther away from
the centre of oscillation of the plate, and thus diminish or increase the throw of
the pawl.
The teeth of the saw are set by means of the bevel-ended pins V, which slide
through the blocks W and W¹, one upon each side of the line of travel of the saw,
and each of these blocks has its upper adjacent face inclined, so that the pin
moving through the opposite block will bend the point of the saw teeth against
the inclined face of the opposing one. These points are operated alternately
by arms X, which are in turn oscillated about their fulcrum pins Y by an eccentric 'Z,
and a connecting rod Z, uniting it with the levers. The levers are connected
with the connecting rode by heads Z, which are adjusted upon the rods by 'set-
screws.
During the time when two of the teeth of the saw are being filed and two others
are being set by the operation just described the saw will be firmly clamped
between the blocks W and W₁; but when it is necessary to advance the saw

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another tooth it is temporarily released by moving the block W₁ a little way from
the block W. This is effected by mounting the block W upon the end of a
sliding bar a. This bar slides in suitable guides beneath the bed plate A, and is
operated by a lever b, which is fulcrumed upon the bed plate and has its upper end
extending to a point near the shaft C. Upon the shaft C and in line with this
lever is a cam c, which engages the lever at the proper interval between the
movements of the saw setting and filing cranks or cams, so that when these latter
are temporarily out of action the lever and slide will be moved and the clamps
opened, and the pawl acting upon the saw will press it forward, after which the
clamps are again closed to hold the saw firmly while the next set of teeth are being
Bet and filed.
In order to hold the files properly down to their work and prevent their jumping
or chattering, I have shown the spring arms d, fixed to a supporting standard and
having adjusting screws e in the ends, which press upon the guides upon which
the file-carrying slides travel, and thus hold them down to their work.
The whole device is easily adjustable for saws having any sizes of teeth or any
depth of blade.
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. In a saw filing device, the jaws for holding and guiding the saw, the hinged
adjustable guides projecting transversely above the saw, slides travelling upon said
guides and having yokes or means for holding files which are reciprocated therewith,
a driving shaft and cranks, and connecting rods uniting said cranks with the
reciprocating slides, substantially as herein described.
2. The combination, in a saw filing machine, of clamps for holding the saw,
hinged adjustable guides extending transversely above the saw blade, file carrying
slides travelling upon said guides, a crank shaft, crank connecting rods by which
said slides und files are caused to reciprocate, and spring arms with adjusting
screws adapted to press upon the guides to hold the files down, substantially as
herein described.
3. In a saw filing machine, the saw holding clamps, the hinged guides extending
above the edge of the saw, file carrying slides and cranks by which the slides are
caused to reciprocato upon the guides, and lifting arms, cranks, and cams upon the
main shaft by which said arms are actuated to alternately lift each of the guides
when the slides are being withdrawn after the file has made its cut, whereby it is
withdrawn out of contact with the saw tooth, substantially as herein described.
4. In a saw filing machine, the saw holding clamps, file carrying slides, and
cranks by which they are reciprocated, hinged guides upon which the slides travel
above the edge of the saw, swivel heads to which the guides are hinged, and screws
by which said swivel heads may be adjusted to or from each other to regulate the
position of the files to the teeth of the saw substantially as herein described.
5. In a saw-filing machine the saw holding guides.or clamps, file carrying slides
cranks and connecting rods by which they are actuated, guides upon which the
slides travel above the teeth of the saw while being withdrawn after making a cut,
in combination with the pawl crank arms and cam by which the saw is advanced
after each cut, substantially as herein described.
6. In combination with a saw holding and filing device, as herein described, the
levers and cam by which the saw is advanced and the pawl carrying plate having
a radial slot and adjusted nut and pin whereby the throw of the pawl may be
regulated, substantially as herein described.
7. In the saw filing and setting machine guides within which the saw is supported
file carrying slides with connecting-rods and crank, and guides upon which the
files are reciprocated across the edge of the saw, setting blocks between which
the saw teeth pass having the inclined opposing faces, the setting pins having
bevelled ends adapted to engage the teeth of the saw when they stand opposite

page_text: the pins and levers by which said pins are actuated, substantially as herein
described.
8. A saw setting and filing apparatus consisting of the guide-jaws between
which the saw blade is placed reciprocating file carrying slides travelling above the
edge of the saw, setting blocks having the bevelled opposing faces and the setting
pins sliding therein, with the reciprocating levers by which said pins are actuated,
an arm upon which one of the setting-blocks is fixed, and a fever and cam by
which said arm is moved, so as to open the jaws and release the gaw while the feed
mechanism acts to move it forward, and by which the jaws are closed to clamp the
saw when the Betting pins and files are acting upon the teeth thereof,,substantially
as herein described.
9. In a saw filing & setting machine the setting blocks with inclined opposing
faces, setting-pins with bevelled ends adapted to engage the saw teeth, and bend
them in opposite directions, levers engaging and actuating the setting pins, an
eccentric and eccentric-rod, and adjusting-heads and set-screws by which the pin
actuating levers aro adjustably connected with the eccentric-rod substantially as
herein described.
•
10. In a saw filing and setting device, the jaws for holding the saw, the
horizontally moving setting pins and files, in combination with the vertically-
adjustable posts or supports for the back of the saw and the holding screws,
substantially as herein described.
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FM 1800