Apparatus in Connection therewith.
Year: 1887

page_text: Date of Application, 17th Mar., 1887
Complete Left, 19th Dec., 1887-
Complete Accepted, 17th Feb., -1.888
Apparatus in Connection therewith.
I, JOHN TILLE, of Prague, Bohemia, in the Empire of Austria, Engineer and
Manager of the Industrial Schools in Prague aforesaid, do hereby declare the nature
of my said invention to be as follows:-
The object of my invention is to effect improvements in reciprocating saw mills
and in machinery in connection therewith.
1 arrange the feed in such a manner that no forward movement of the timber takes
place during the upward motion of the saw or saws, and the whole of the cutting
action is performed during the down stroke. In one arrangement the feed motion is
communicated from the main crank, or the saw frame actuated by the main crank, by
means of a connecting rod, to a bell-crank lever, the vertical portion of which has an
adjustable screw nut fitted thereto. This nut carries one end of a connecting rod,
the other end of which is jointed to a radial rod on the feed wheel, and this radial rod
carries the pawl, which drives the feed wheel. The position of the rod upon the bell
crank lever governs the length of stroke and amount of feed; and the working length
of the rod is adjustable by means of a screw nut upon the same to which the pawl
lever is jointed.
In some cases I use an intermediate crank to produce the feed motion, the dead
points of which lie in a different position to the dead points of the main crank, and
connect such additional crank, by means of a suitably arranged feed motion, with the
pawl and feed wheel. Or the main crank may be used with such last mentioned
arrangement, by placing the connecting rod at a suitable angle.
In mounting my saws I use a double frame, and stretch the saws between the
frames, using thinner blades than usual, and forming the angles of the teeth to suit
the exact angle of the saws in the frames, the lower end of the saw being so arranged
that all the saws can be adjusted at once, as to their inclination.
In adjusting the inclination of the saws I make use of a jointed rule, with a line
and plummet, clamps and adjusting screws, one portion of the rule being placed in a
ine with the teeth and the other in a vertical line-I also use an instrument with two

page_text: or three articulated joints in a horizontal position and attach it to any fixed object
near the blades, the free end being placed near the vertical rule to test the
'inclination.
The blade is then moved slowly up and down, when any irregularity is at
once seen.
Owing to the circumstance that no cutting action takes place during the upward
stroke. I am enabled to use teeth of similar forms to those of circular saws, viz.: with
a nearly vertical front to each tooth; the method of sharpening such teeth being
simple and easy, and the line of such teeth remains constant."
I make use of saws made of thinner material than usual, and use a line "set" to
the teeth and such teeth are also much broader than usual.
Separate teeth may also be used and fixed to the blade, as now carried out with
some descriptions of circular saws.
By the use of my improvements a very fine cut, with a saving of material, is
secured, with economy of power and saving of weight in machinery, and such mills
may readily be made portable.
GEO. DOWNING,
Agent for Applicant.

page_text: Apparatus in Connection therewith.
I, JOHN TILLE, of Prague, Bohemia, in the Empire of Austria, Engineer and
Manager of the Industrial Schools in Prague aforesaid, do hereby declare the
nature of my said invention 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 effect improvements in reciprocating saw Mills,
and in machinery in connection therewith.
I arrange the feed in such a manner that no forward movement of the timber takes
place during the upward motion of the saw or saws, and the whole of the cutting
action is performed during the down stroke. In one arrangement the feed motion is
communicated from the main crank, or the saw frame actuated by the main crank, by
means of a connecting rod, to a bell crank lever, the vertical portion of which has an
adjustable screw nut fitted thereto. This nut carries one end of a connecting rod, the
other end of which is jointed to a radial rod on the feed wheel, and this radial rod
carries the pawl, which drives the feed wheel. The position of the rod upon the bell-
crank lever governs the length of stroke and amount of feed; and the working length
of the rod is adjustable by means of a screw nut upon the same to which the pawl
lever is jointed.
In some cases I use an intermediate crank to produce the feed motion, the dead
points of which lie in a different position to the dead points of the main crank, and
connect such additional crank, by means of a suitably arranged feed notion, with the
pawl and feed wheel. Or the main crank may be used with such last mentioned
arrangement, by placing the connecting rod at a suitable angle.
In mounting my saws I use a double frame, and stretch the saws between the
frames, using thinner blades than usual and forming the angles of the teeth to suit
the exact angle of the saws of the frames, the lower ends of the saws being so
arranged that all the saws can be adjusted at once, as to their inclination.
In adjusting the inclination of the saws, I make use of a jointed rule, with a line
and pluminet, clamps, and adjusting screws, one portion of the rule being placed in a
line with the teeth, and the other in a vertical line. I also use an instrument with
two or three articulated joints in a horizontal position, and attach it to any fixed
object near the blades, the free end being placed near the vertical rule to test the
inclination. The blade is then moved slowly up and down, when any irregularity is
at once seen.

page_text: Owing to the circumstance that no cutting action takes place during the upward
stroke, am enabled to use teeth of similar forms to those of circular saws, viz.: with
a nearly vertical front to each tooth; the method of sharpening such teeth being
simple and easy, and the line of such teeth remains constant."
I make use of saws made of thinner material than usual, and use a fine "set" to
the teeth, and such teeth are also much broader than usual. Separate teeth may also
be used and fixed to the blade, as now carried out with some descriptions of circular
Saws.
By the use of my improvements a very fine cut, with a saving of material, is
secured, with economy of power and saving of weight in machinery, and such mills
may readily be made portable.
And in order that my said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawings.
Fig. 1 is an edge view, and Fig. 2 a side view, shewing my jointed rule or
inclinator, and the method of application in adjusting the inclination of the saws.
Fig. 3 is a section, on the line rx of Figs. 1 and 2.
Fig. 4 is a plan, and Fig. 5 a side view of the articulated rule, used to test and set
the inclination of the blade and teeth.
Fig. 6 shews the form of the teeth of the saws.
Fig. 7 is an outline view, shewing the arrangement of mechanism adapted to
operate the Saw, in the manner delineated and shewn in Fig. 14.
Fig. 8 is a front elevation of the saw frames, and Fig. 9 a side view of the same.
Fig. 10 is an outline view, shewing the arrangement of mechanism adapted to
operate the saw, in the manner delineated and shown in Fig. 15.
Fig. 11 is a detail view of the upper part of Fig. 7.
Fig. 12 is intended to illustrate a motion of the saw and timber respectively,
resulting in cutting during the up-stroke, which this invention is intended to
avoid.
Fig. 13 is intended to illustrate the motion of the saw and timber respectively, with
ordinary teeth, and a better method of operating the feed motion.
Fig. 14 is intended to illustrate the effect of the arrangement shewn in Fig. 7.
Fig. 15 is intended to illustrate the effect of the arrangement shewn in Fig. 10.
Figs. 16. 17 and 18 are details of the frame shew in Fig. 8; Fig. 16 being a
section, on the line c. d of Figs. 17 and 18, Fig. 17 is a front view, and Fig. 18 a
horizontal plan, partly in section.
The motions of the teeth and timber respectively are shewn in Figs. 12, 13, 14
and 15. The positions of the points of the teeth, marked 1 to 7, are shown in their
highest positions, in Figs. 12 and 13, by the indications 11 to 71; and the positions of
the points, in their lowest positions, in the four figures 12, 13, 14 and 15, are shewn
by the indications 1" to 7"; the dotted lines representing the path of motion, during
one complete revolution of the driving crank (Figs. 7 and 10).
The log b (Figs. 8 and 9) is mounted in the usual manner, and the feeding is
effected by the usual spur wheel and pawl gearing.
Referring to Figs. 7 and 11, k is the crank, and ky one of the connecting rods to
the journals yy (Fig. 8). R is the feed ratchet wheel. a is the pawl and 6 the spring
The forked
for actuating the pawl, carrried by the arm e, working on the centre z.
end of the arme is pivotted at h to a sleeve g, capable of sliding a short distance upon
the rod t, the sliding distance being regulated by the aut d. The rod t is connected
by a rod (not shown) joining n to y. When the crank is in its lowest position, the
sleeve rests against the collar c. When the crank k ascends, the rod t is driven
from m towards m' (Fig. 7) by the bell crank lever m, o, n leaving the pawl at rest
until the nut d engages the sleeve g, and thereby drives the feed wheel R the
necessary distance. This arrangement ensures the intermittent action of the feed, as
herein before mentioned.
The second arrangement is shewn in Fig. 10, which also contains a pawl and
ratchet wheel, for feeding. The arm e is jointed directly to the rod hạm.
The ben

page_text: lever lever mon vibrates upon o as a centre, by means of the connecting rod qn,
bell crank lever pr and connecting rod r. k; k. being the crank. kr, is, in this
case, the feeding rod, and ky the sawing rod...
In the position shewn in Fig. 10 the crank k is near the dead point, while the links
forming the feed motion are moving rapidly, thus effecting my object of feeding while
the saw is at rest or nearly so.
1 make use of a double saw frame, shewn in elevation in Fig. 8, in side view in
Fig. 9, and in detail in Figs. 16, 17 and 18. In Figs. 8 and 9, M N. O P is the
inner frame, vu is the outer frame. The saw blades are strained between 3 and N,
the force being sustained by the struts O P.
In Figs. 16, 17 and 18, M is a portion of the top of the innner frame, and T is a
portion of the outer frame. The inner frame M. is provided with a projection H on
each side, and the outer frame is similarly provided with a projection H. F is a
wedge with a bolt and nut. By screwing up the nut the wedge F is drawn forward
and the frame N. O, P. is lengthened; the tension of the saw blades being thereby
effected. The inclination of the inner frame (and consequently of the saw blades)
with respect to the outer frame, is adjusted by screws F', (Fig. 18)-By this arrange-
ment the whole strain of the saw blades is sustained by the inner frame, and the outer
frame is entirely relieved therefrom.
The instrument, which I call an "inclinator," is shewn in Figs. 1, 2 and 3, as applied
to a saw blade. The two portions 8 and 9 of the inclinator are jointed at 10.-
11 and 12 are two screw clamps to clamp the saw blade, as shewn. A spring is fitted
to 12 to drive the limbs apart, and a screw 13 is fitted to draw them together. A line
and plummet 14 are used to adjust the vertical limb 8. The inclination of the saw
blade is adjusted, by means of the inclinator, to suit the speed of the feed; and the
speed at which the feed travels is regulated by means of the screw attachment m
(Figs. 7 and 10).
When the blade has been adjusted, as last aforesaid, the horizontal articulated
rule shewn in Figs. 4 and 5 is then attached to any fixed object next to the
blades, by means of the clamp 15, in such a manner that the end 16 is coincident
with the blade. By then moving the saw frame up and down, any irregularities in
the blade and teeth can be detecter.
The blades perform no work in their upward motion, and the teeth are formed
as shewn in Fig. 6, so that the edges are nearly or altogether in line with each
other. This arrangement imparts great strength to the teeth. The teeth are sharpened
in the direction shewn by dotted lines, other forms of teeth may be used, especially
such as are formed with the cutting edges broader than the rest of the teeth, such
teeth being manufactured and fixed to the blade in the usual manner.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what I
claim is :-
1. In combination with reciprocating power saws, the method and means of
effecting a dwell or stoppage (or nearly so) of the feed twice during each revolution
of the driving crank, that is to say, once at the beginning of the ascent, to prevent
the action of the teeth during their upward motion, and also during the descent,
when the teeth are cutting, substantially as herein before described and shewn on the
drawings.
2. In combination with reciprocating power saws as aforesaid, the feeding mechanisin
shewn in Figs. 7 and 11, having a loose sleeve g-capable of a limited amount of
motion between the projections c and d, upon the rod t, substantially as and for the
purpose herein before described and shewn in such figures 7 and 11.
3. In combination as aforesaid, the feeding mechanism shown in Fig. 10, sub-
stantially as and for the purpose herein before described.
4. The application and use of an independent frame M N O P, capable of being
adjusted in the main frame, substantially as and for the purposes hereinbefore
described and shewn in Figs. 8, 9, 16, 17 and 18 of the drawings.

page_text: 5. The application and use of the "inclinator" substantially as and for the purpose
hereinbefore described and shewn in Figs. 1, 2 and 3 of the drawings.
6. The application and use of the articulated horizontal rule substantially as and
for the purpose hereinbefore described and shewn in Figs. 4 and 5 of the drawings.
7. The method of forming the teeth of saws for the purpose aforesaid, substantially
as herein before described and shewn in Fig. 6 of the drawings.
8. The general arrangement, construction, and combinations of parts severally and
respectively constituting my improvements in reciprocating saws and in machinery
and apparatus in connection therewith substantially as herein before described and
shewn on the drawings.