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Патент USA US2128521

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Aug. 30, 1938.
A‘. E, BECKMAN
2,128,521
SHAKE SPLITTING MACHINE
Filed April 26, 1937
20/19/ :94
BY
INVENTOR.
AXEL E. . BECKMAN
-. 72
ORNEY.
Patented Aug. so, 1938
'
2,128,521
UNITED STATES PATENT‘OFFICE
2,128,521
_
SHAKE-SPLITTING MACHINE
Axel E. Beckman, Oregon City, on‘.
Application April 26, 1937,‘ Serial No. 139,023 ‘
4 Claims. (Cl. 144-193)
This invention is directed to an apparatus for from the center with openings III, II, l2 and I3.
the manufacture of shakes and is constructed These openings are designed to provide for the
with a view to providing for the splitting from an
connection of the pltman 8 to the power wheel 9
appropriate block of a‘ shake of the desired thick-
and obviously provide for different length throws
Q ness at the butt end and of tapering formation
from the butt end.
Heretofore, at least in the majority of instances, shakes have been formed by the use of
cutting knives which are forced through the
1' block, or saws which operate on the block, with
the disadvantage that in the ?rst instance the
surface of the shake is naturally smooth and
must be subsequently treated .to get the desired
roughness or grain, and in the second instance.
ll there is a considerable loss of material dueto the
cutting width of the saw.
'
-
'
The primary object of the present invention,
therefore, is the provision of a wedge-shaped
splitting element which may be forced into the
M block and split therefrom a shake of the desired
or movements of the bars 8.
-
' 5
The bars 5 are provided near their upper ends
with channels '28 to receive cross-bars l4 which
are thus mounted to be adjusted longitudinally
of the bars 5 so that the space between any pair
of cross-bars 14 maybe adjusted. In the in- 10
stance shown, there are two sets-or pairs of such
cross-bars l4 and the space'between these bars
is to be regulated through positioning in selected
channels 28 to receive the length of block I5 from
which the shakes are to be split. The block is 15
positioned between the side bars 2 of the frame
and between a pair of cross-bars l4, thus ‘permit
ting the block to be merely placed in position,
provided, however,-that if desired holding blocks
21 may be mounted upon the blocks l5 and pre- 20
thickness at the butt end, tapering from such
vented from endwise movement though permitted
butt end and having the natural rough grain
adjustable vertical height, to accommodate the
?nish by reason of its being split from the block
rather than out therefrom.
a
The invention is illustrated in the 'accompany-
ing drawing, in which:
Figure 1 is a perspective view of the apparatus
as a whole.
.
blocks originally and as they are split away, by
pins projecting from the blocks 21 and guided
between uprights 29, as clearly illustrated, as the 25
cross-bars prevent endwise movement -'of the
block during operation of the machine.
The block of material is loosely con?ned be
Figure 2 is a longitudinal sectional view of the
a machine shown in Figure 1.
Figure 3 is a similar view showing the splitting
tween the bars M, at the same time the bars act
as abutments for the block at the time the wedge 30
splits a shake. In order to facilitate the split
implement entering the block from the end opposite the operation indicated in Figure 2.
Figure 4 is an enlarged sectional view on the
“ line 4-4 of Figure 2.
.
ting action and enable the wedge to follow the
grain of the wood and thereby properly shape the
shake, the block of material tilts slightly.
Secured to the longitudinally operating bars 6 35
Figure 5 is a transverse section through the
apparatus on the‘ line 5-15 of Figure 2.
Figure 6 is a broken longitudinal section, partly in elevation, of the apparatus.
Figure '7 is a broken elevation showing the
means for providing adjustable stroke lengths of
appropriate length of metal having rather abrupt
ends terminating at each side edge in a splitting
edge H which is naturally sharpened. The
thickness of the splitting element l6 increases 40
from the abrupt side edges or ends toward the
the slide bar.
center, being thicker'at the center, as indicated at
_
Figure 8 is a transverse section of the splitting
- tool.
‘5
is a splitting element It, which element is an
IS in Figure 8.
Beyond the splitting element, the bars 6 are
The construction providesaframe including an connected by a supporting plate IS. The sup- 45
upper box-like body I having'side walls 2 and end porting plate is secured to the under side of the
walls 3, with the body supported upon appropri- bar but is presented with an upstanding offset 2!]
ate legs. Side walls 2 are provided on their in-_ fitting a recess 2| in the inner surfaces of the
nor surfaces with longitudinally extending ver- bars 6, so that the supporting plate is on a hori
50 tically spaced bars 4 and 5 providing between zontal plane below that of the splitting element 50
them channels in each of which are mounted which is secured tothe upper surfaces of the bars
slide bars 6 united at one end beyond the frame 6. The splitting wedge has its end seated in a
in a connecting plate 1 to which is pivotally con- transverse recess 22 in the upper surfaces of the
nected a pitman 8. A belt or other power-driven bars 6, being secured by a bolt 23, the lower end of
I‘ wheel 9 is formed at different radial distances which is provided with a securing nut 24 seated 55
2
2,128,521
in an opening 25 in the lower surfaces of the
bars 6. ‘The connection described, and which is
shown more particularly in Figures 4 and 5, per
mits vertical adjustment of the splitting element
as a whole in order to select a desired thickness
of the butt end of the shake to be produced.
In the instance shown, the machine is designed
for two blocks and the splitting element [6 and
supporting plate i9 will be duplicated, as indi~
10 cated in Figures 2 and 3.
In operation, the blocks l5, or one such block
if only one is to be used, are placed in position
between the appropriate pair of cross-bars i4.
bar and spaced apart to provide a guideway, slide
bars movable in the respective guideways, a split
ting tool arranged transverse and connected to
the respective slide bars, the ends of the tool ?t
ting in notches in the respective slide bars, with
the notches of a depth exceeding the maximum
thickness of the tool to thereby accommodate and
provide for vertical adjustment of the tool with
respect to the slide bars without projecting the
tool above the upper surface of the slide bars, a 10
material block supporting plate connected to the '
respective slide bars, said plate having offset ter
minals secured to the lower surfaces of the slide
These cross-bars have been adjusted to prevent '
bars, with the offset terminals of a depth to
undue endwise movement of the block in‘ the hold the supporting plate in a position below any
splitting operation and the block in position rests possible position of the tool in the slide bars, 15
upon the particular underlying supporting plate means for reciprocatitng the slide bars to simul
I 9. In the driving of the power wheel 9, the bars taneously operate the tool and supporting plate,
6 are moved in one direction, the splitting ele
the upper guide bars being formed with a series
20 ment is caused to enter the end of the block, but
of notches extending longitudinally of said bars, 20
incident to its construction, compels a splitting and cross bars loosely ?tting similar notches of
operation rather than a cutting operation.
the respective guide bars to hold the material
This splitting operation incident to the forma
block against longitudinal movement on the sup
tion of the block follows the grain of the block porting plate during operation of the knife.
25 in a taper, so that the resultant shake is tapered
2. A construction as de?ned in claim 1, includ
from one end to the other. As the splitting ele
ing holding blocks to rest upon the upper surface 25
ment moves through the split and beyond the of the material block and means carried by the
block at the opposite end, the corresponding upper guide bars for preventing longitudinal
movement of the supporting plate i9 permits the movement of the holding block without interfer
30 split shake to drop free of the plate into a pile in
ing with free vertical movement thereof.
the lower portion of the frame. The splitting ele
3. A shake making apparatus, comprising a
ment is now beyond the opposite end of the block
frame, upper and lower guide bars secured on the
and as the movement of the power wheel is con
inner surfaces of the frame and spaced apart to
tinued, the bars 6 are moved in the opposite di
form guideways, slide bars movable in the respec
35 rection and a second shake is split from the block
tive guideways, a wedge arranged transverse and 35
with the butt end at the opposite end of the block.
connected to the respective slide bars, a material
Thus, in a reciprocation of the pitman, two shakes block
supporting plate connected to the respective
are formed, as will be plain from Figures 2 and 3
slide bars, the upper surface of the plate being
of the drawing. Furthermore, if two blocks are below the path of movement of the wedge and
used and the splitting element and supporting spaced
therefrom, means for loosely con?ning a
element are duplicated, the apparatus will form
two shakes at each movement of the supporting
bars 6 or four shakes in each complete recipro
cation of the bars.
7
If longer shakes are to be produced than the
minimum for which the machine is adapted, the
cross-bars I 4 are adjusted to accommodate the
greater length of block and the vertical position
of the splitting element I6 is adjusted and
through the obvious use of supporting means in
the channel 22 below the connected portion of
the splitting element, so as to increase or decrease
the thickness at the butt end of the shake for
providing the different desired lengths of shake.
It is to be particularly noted that the splitting
elements do not cut the material. In cutting
through the material of the block, there is neces
sarily approximately the same thickness of mate
rial of the block divided by the cutting whereas
through the use of the improved splitting ele
ment, which splits and does not cut, it will be
apparent that the wedge formation of the split
ting element causes that portion of the block di
vided by the initial split to be iorced to bend
downwardly, thus splitting the shake from the
block ahead of the splitting element, resulting in
a breaking of the fiber and bringing the shake to
the desired taper and presenting at the same time
that desired roughness or grain-showing highly
desirable in articles of this character.
What is claimed to be new is:
1. A shake making apparatus including a frame
having side and end bars, upper and lower guide
bars secured on the inner surface of each’ side
material block on the plate to permit a slight
movement of the block in the direction of move
ment of the wedge and tilting of the block in the
formation of a shake, whereby when the wedge is
advanced toward the block of material on the
40
plate, the wedge will split a shake from the block, 45
the forward end of the shake passing between the
plate and wedge and the block falling in position
for formation of a subsequent shake.
4. A shake making apparatus, comprising a
frame, upper and lower guide bars secured on the
inner surfaces of the frame and spaced apart to
form guideways, slide bars movable in the re
spective guideways, a two-edge wedge arranged
transverse and connected to the respective slide
bars, a material block supporting plate con-4 55
nected to the respective slide bars, the upper
surface of the plate ‘being below the path of
movement of the two-edge wedge and spaced
therefrom, means for loosely con?ning a material
block on the plate to permit a slight movement of 60
the block in the direction of movement of the
wedgev and slight tilting of the block in the for
mation of a shake, means for reciprocating the
two-edge wedge whereby when the two-edge
wedge is advanced in one direction toward the
block of material on the plate, the wedge will split
a shake from the block, the forward end of the
shake passing between the plate and wedge and
the block falling in position to be acted on in the
reverse movement of the wedge in the formation
of a subsequent shake.
.
AXEL E. BECKMAN.
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