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Патент USA US3066722

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Dec. 4, 1962
D. L. SPANJER
3,066,712
LOG BARKING MACHINE
Filed May 4, 1959
3 Sheets-Sheet 1
INVENTOR
_L..S‘PANJER
HIS ATTORNEY
Dec. 4, 1962
D. L. SPANJER
3,066,712
LOG BARKING MACHINE
Filed May 4, 1959
3 Sheets-Sheet 2
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INVENTOR
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BY
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ms ATTORNEY
Dec. 4, 1962
D. L. SPANJER
3,066,712
LOG BARKING MACHINE
Filed May 4, 1959
3 Sheets-Sheet 3
H2
.INVENTOR
‘ DAV/D L. .S‘PANJER
United States Patent @?hce
3,066,712
Patented Dec. 4, 1962
1
2
3,066,712
belt 24. A housing 45 is provided for the pulleys and
LOG BARKING MACHINE
David L. Spanjer, Baie d’Urfee, Quebec, Canada, as
siguor, by mesne assignments, to Ibis Enterprises
Limited, Hamilton, Bermuda, a body corporate of Ber
muda
Filed May 4, 1959, Ser. No. 816,738
3 Claims. (Cl. 144-208)
the gear train 48.
The conveyors 28 and 30 of the charge unit 26,
and the conveyors 34 and 36 of the discharge unit 32
(see FIG. 2) are connected to be driven by gears 64,
66, 68 and 70, respectively, these gears being intermeshed
to drive the conveyors at an equal speed. The pulley
50 is connected to the shaft 51 to drive the gear train
48, comprising a gear 72 connected to the shaft 51,
This invention relates to log barking machines, and 10 and gear 74 which drives a gear 76 which in turn drives
more particularly to a safety device for such machines.
a gear 78 and a gear 86, gear 80 being connected to
It is an object of this invention to provide a ‘safety
the gear 78 to drive the gears 66 and 70 and there
device for a log barking machine that can stop the entire
through the gears 64 and 68. The gears 64, 66, 68 and
machine substantially without any delay in case of an
76 are connected to shafts 61, 63, 62 and 65, respec
emergency.
tively, to drive the associated conveyors.
Another object of this invention is to provide means
According to this invention a safety device has been
to operate the safety device from various locations of
provided to halt the operation of the units as quickly
the machine.
as possible in case of an emergency. Although the
Still another object of this invention is to provide
means to rotate one of the units of the machine manu
units may be stopped by stopping the engine (not shown)
that drives the units, it is obvious that by reason of the
inertia of the various moving components of the ma_
chine the units cannot possibly be stopped instantly, as
ally while the other units are inoperative.
These and other objects and advantages of this in
vention will appear more fully from the following spec
would be required in a case of an emergency. In order
i?cation made in connection with the accompanying
to stop the units almost instantly the safety device acts
drawings, in which
25 to disengage the power take-off 38 of the engine (not'
FIGURE 1 is a side View of the log barking machine
shown) from the transmission mechanism 44, and simul
mounted on a truck,
taneously, to apply a brake to the pulley 46 driven by
FIG. 2 is a rear end view of FIG. 1 showing the
the pulley 46 of the power take-off 38.
safety device, the charge and discharge units, and the
transmission mechanism,
This is achieved by an arrangement of an arm 82'
30 being pivotable around a stationary shaft 88 and pro
‘FIG. 3 is a top view of a portion of FIG. 1 showing
vided at its one end with a brake shoe 84 and at its
the gear train of the transmission mechanism and the
other end with a belt tensioner in the form of an idler
location of a clutch arrangement adapted to permit man
86. It is to be noted that the brake 84 and the idler 86 >
ual rotation of one of the units while the other units
are positioned such, that when the arm 82 is pivoted in
are inoperative,
v35 one direction the brake 84 is inoperative While the idler
FIG. 4 shows the clutch partly in longitudinal sec
86 is in tensioning relation with the belt 42, as shown in
tion, and
FIG. 2. When the arm 82 is pivoted in the other di
FIG. 5 is a cross sectional view of the clutch taken
rection the idler 86 is inoperative and the brake 84 is i
along the line 5~5 of FIG. 4 and looking in the direc
in braking relation with the pulley 46. The idler 86 is
tion of the arrows.
40 urged upon the belt 42 to keep the belt tensioned for
Referring now more particularly to the drawings, 10
transmitting rotary motion from the pulley 48 to the
designates a truck on which is mounted a log barking
pulley 46. Whenever the idler 86 is retracted from its '
machine 12 (see FIG. 1). The log barking machine
operational position relative to the belt 42, the belt 42 '
12 comprises a barking unit 14 in the form of a rotary
will be untensioned to prevent transmission of motion
drum 16 equipped with cutter arms 18 connected to the 45 ‘from the pulley 40 to the pulley 46. The belt 42 will I
drum 16 and adapted to bark a log 20. A pulley 22
slip.
drives the drum 16 by means of a belt 24.
The arm 82 is also provided with a spring 96 being A.
The logs to be barked are advanced into the barking
connected to a point 98 of the arm 82, to constantly
unit 14 by a charge unit 26, comprising two cooperating
urge the arm 82 to pivot in a direction to untension the
conveyors 28 and 30, positioned at one end of the bark~
belt 42, and simultaneously, to apply the brake 84 with .
ing unit 14. The logs, after being barked in the barking
unit 14, are transported therefrom by a discharge unit
32, comprising two cooperating conveyors 34 and 36,
force to the pulley 46.
A locking device 90 is provided to hold the arm 82
in a position, so that the idler 86 is in tensioning rela
tion with the belt 42. The locking device 90 comprises
positioned at the other end of the barking unit.
A power take-oil 38 (see FIG. 2) is provided by the 55 a rod 94 connected at its one end to the lower portion
engine (not shown) of the truck 10. A pulley 40, con
of the arm 82 and at its other end to a past center lock
nected to the power take-off 38, drives by means of a
92. When the past center lock 92 is actuated to be
belt 42 and a transmission mechanism 44 the barking
released, the rod 94 is retracted to retract the idler 86
unit 14, the charge unit 26, and the discharge unit 32,
from its tensioning relation with the belt 42 to cause
simultaneously.
The transmission mechanism 44 (see FIGS. 2 and 3)
includes a gear train 48, pulleys 46 and 54 keyed to a
60 the belt 42 to slip.
As soon as the locking device 90
is released and the rod 94 is retracted, the arm 82 is
forced by the spring 96 to pivot, so that the brake shoe
84 will be forced into frictional contact with the pulley
train 48 is driven by the pulley 50 by means of the shaft
46. The pulley 46 being disengaged from the power
51, the pulley 56 in turn being driven by means of a 65 take-off 38 of the engine (not shown) of the machine,
belt 52 driven by the pulley 54. The shaft 56 is con
and the braking action of the brake 84 to stop the pulley
shaft 56, and a pulley 50 keyed to a shaft 51. The gear
nected to a clutch 58 and a bevelled gear arrangement
46, will cause the units to be halted.
60 to rotate the pulley 22. As the pulley 46 is driven
To release the locking device 90, the lever arm 100
by the pulley 46 by means of the belt 42, the pulley 46
of the past center lock 92 is simply pulled upwards.
drives the pulley 54 to drive the gear train 48, and also 70 This is achieved by means of a cord 102 connected to the
drives the shaft 56 to drive the pulley 22. The barking
lever arm 100 and leading to various locations of the
unit 14 is rotated by the pulley 22 by means of the
machine.
3,066,712
4
of said barking unit to transport logs from said barking
It is to be noted that in case of an emergency when
unit, a transmission mechanism adapted to drive said
the safety device is operated, the inertia of the barking
unit 14, by reason of its substantial weight, is such that
the action of the safety device would not be powerful
enough to halt all the units instantly when the barking
unit 14 would be positively connected to the shaft 56.
units simultaneously, a driver, a ?rst drive element con
nected to be driven by said driver, said transmission
mechanism including a second drive element, connecting
means to transmit rotary motion from said ?rst element
to said second element to operate said transmission mech
anism, means rendering said connecting means in opera
tive to transmit motion and to brake said second ele
In view thereof a clutch arrangement has been provided
to automatically permit the barking unit 14 to continue
rotating when the saftey device is operated to provide
for the charge unit 26 and discharge unit 32 to be halted 10 ment and forcibly halt operation of said transmission
mechanism thereby stopping said units when said driver
instantly. This is important, as an emergency is vmore
is in operation, said transmission mechanism including
likely to arise at the charge unit 26 and the discharge
means for maintaining a drivable connection between
unit 32, because of the position and the manner of opera
said transmission mechanism and said barking unit in a
tion of the units, rather than at the barking unit 14.
According to this invention, the clutch arrangement 15 predetermined direction While allowing rotation of said
barking unit in said predetermined direction when said
includes a clutch 58 connected to the shaft 56 driving the
transmission mechanism is halted.
bevelled gear arrangement 60, the pulley 22, and the
2. A machine for barking logs comprising, .a rotary
barking unit 14. Clutch 58 is of a commonly known
barking unit to bark such logs, a charge unit positioned
type, either the ratchet type or the type shown in Patent
No. 1,708,215 to W. A. Chryst. Preferably, the common 20 at one end of the barking unit to advance logs to said
barking unit, a discharge unit positioned at the other
1y known ratchet type clutch is used including a mem
end of said barking unit to transport logs from said
ber 104 connected to the shaft 56, and a partly splined
barking unit, a driver, a transmission mechanism con
shaft 106 having a positive connection with the member
nected to said driver to operate said units simultaneously,
104 to transmit rotary motion from the member 104 to
a ?rst pulley connected to be driven by said driver, said
a member 108 connected to drive the bevelled gear ar
transmission mechanism including a second pulley, a
rangement 60. The member 108 is usually provided with
belt adapted to transmit rotary motion from said ?rst
six notches 110 and four pawls 112 adapted to cooperate
pulley to said second pulley, a safety device including a
with each other such that the member 108 is driven in
brake connected to said machine and positioned to be
one direction only. The portion 114 of the shaft 106
extending in the member 108 is adapted to actuate the 30 applied to stop said second pulley, and a tensioning
mechanism connected to said machine and positioned to
pawls 112 and to urge two of the pawls 112 radially
apply tension to said belt to transmit such motion, ?rst
into operational relation with the member 108 when the
means to release the tensioning mechanism and to apply
shaft 106 is rotated in one direction. When, however,
said brake to stop said units substantially simultaneously,
the units 26 and 32 are halted and the shafts 56 and 106
said
transmission mechanism including means for main~
35
are inoperative, the shaft portion 114, the notches 110,
taining a drivable connection between said transmission
and the pawls 112 cooperate with each other to render
mechanism and said barking unit in a predetermined
the pawls 112 inoperative relative to the notches 110
direction
while allowing rotation of said barking unit in
and member 108 to permit the member 108 to continue
rotating.
said predetermined direction when said transmission
units will be halted, but, for the aforementioned rea
sons, the charge unit 26 and the discharge unit 32 are
3. The device claimed in claim 2 in which said ?rst
means includes means extending along the machine and
operable at various locations therealong to operate said
It will be seen that in case of an emergency all three 40 mechanism is halted.
halted instantly by the prompt action of the safety de
vice and by the provision of the clutch arrangement.
first said means.
With the provision of the clutch 58 another purpose 45
is served, namely that, when the shaft 56 and the units
26 and 32 are inoperative, the barking unit 14 may be
rotated manually in one direction only. This will permit
the operator of the machine to carry out operations on the
barking unit 14, requiring rotation thereof, ‘without rotat 50
ing the engine or the transmission mechanism.
It should be understood that the description and draw
ings herein are illustrative only, and that various changes
and modi?cations may be made in the structure disclosed
without departing from the spirit of the invention.
I claim:
55
References Cited in the ?le of this patent
UNITED STATES PATENTS
247,075
Olson _______________ __ Dec. 4,
Mitchell ____________ __ Sept. 10,
Rivers _______________ __ Oct. 5,
Whitlock ____________ __ Apr. 8,
Eklund et al. _________ __ Jan.'20,
2,646,092
2,779,363
2,880,942
Kolpe et a1. __________ .._ July 21, 1953
Laughton ____________ __ Jan. 29, 1957
215,700
64,545
Australia ____________ __ June 11, 1958
Switzerland __________ __ May 7, 1913
l. A machine for barking logs comprising, a rotary
barking unit to bark such logs, a charge unit positioned
at one end of the barking unit to advance logs to said
barking unit, a discharge unit positioned at the other end
Larzelere ____________ __ Sept. 13, 1881
1,248,700
1,727,933
2,330,996
2,591,751
2,625,968
1917
1929
1943
1952
1953
Hall _________________ __ Apr. 7, 1959
FOREIGN PATENTS
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