The first claim of reissued letters patent No. 8986, granted to
Robert Newton, December 2d 1879, for an improvement in gang ploughs
(the original patent, No. 56,812, having been granted to F. S.
Davenport, as inventor, October 9th, 1886), namely,
"1. In a wheel plough, the combination, with a swing axle and
ground or carrying wheel, of friction clutch mechanism and means
for engaging and disengaging the latter with the ground or carrying
wheel, said parts being constructed and adapted to raise the plough
by locking the swing axle to the carrying wheel by friction clutch
engagement, and raise the plough beam by the draft or power of the
team, substantially as set forth,"
is, in view of the state of the art at the time of the invention
of Davenport, not infringed by an apparatus in which the axle and
the friction clutch mechanism are different, as devices, from those
of the patent.
The first claim of the reissue is invalid, the reissue having
been applied for more than thirteen years after the original patent
was granted and after the defendant had begun to make machines of
the pattern complained of.
The defendant's machine did not infringe the original patent,
and the reissue was taken to cover it.
Page 119 U. S. 374
This was a bill in equity to recover for the infringement of
letters patent. The case is stated in the opinion of the Court.
MR. JUSTICE BLATCHFORD delivered the opinion of the Court.
This is a suit in equity brought in the Circuit Court of the
United States for the Northern District of Illinois by Robert
Newton against the Furst & Bradley Manufacturing Company and
others to recover for the infringement of reissued letters patent
No. 8,986, granted to the plaintiff, December 2, 1879, on an
application filed October 15, 1879, for an improvement in gang
plows (the original patent, No. 56,812, having been granted to F.
S. Davenport as inventor, October 9, 1866).
The specification and claims of the original, and those of the
reissue, and the drawings of the reissue, are as follows, the parts
in each which are not found in the other being in italic:
"
Original"
"Be it known that I, F. S. Davenport, of Jerseyville, Jersey
County, and State of Illinois, have invented a new and improved
gang plow, and I do hereby declare that the following is a
full, clear, and exact description thereof, which will enable
others skilled in the art to make and use the same, reference being
had to the accompanying drawings, forming part of this
specification,
in which -- "
"Figure 1 is a plan or top view of my invention; Fig. 2, a side
view of the same, partly in section, as indicated by the line
x
x, Fig. 1; Fig. 3, a transverse vertical section of the same,
taken in the line
y y, Fig. 1. Similar letters of
reference indicate like parts."
"This machine consists of a frame A, made of two parallel beams
or bars
a a braced together near the front and back pieces
b b. From each of these beams or bars depends a plow B. To
the front crosspiece is bolted an iron standard C strengthened by
an iron stay D running down to the back crosspiece. To the top of
the standard C is attached a spring seat E, the whole supported
upon two wheels F F, each turning upon
an iron axle c, attached
to a hinged board G."
"It will be observed that one of the
axles c, is
attached to the front or upper side of the hinged board G and the
other to the back or underside in such a manner that when it is
turned down in a horizontal position to lower the plows to the
ground, the wheel that runs in the furrow will be as much lower
than the other as the depth of the furrow may require. The
axle that carries the wheel that runs in the furrow is so
formed that it may be removed from the back of the
hinged
board and
bolted to the front, so that the machine
may run level when there is no furrow for the wheel to run in, as
is the case when preparing the ground for cotton seed. "
"The
hinged board G is attached to the plow frame by
two iron hinges, H H', the one H on the side of the long beam,
forming an arm or lever I, to which is attached a chain J, which
passes over a wheel K, and is made fast to the plow frame. The
wheel K turns upon a stud in the end of a lever L, this lever being
bolted to the footboard M, which is hinged to the plow frame in the
same manner and at the same place as the axle
board G. To
the opposite end of the footboard is bolted a bracket or stop
d, against which rests an arm
e, by which the
hinged board G is operated; the arm
e being held
in the vertical position by a latch N, which is lifted by placing
the foot on the back part of it."
"Now it will be seen that to lower the
plows to the
ground, it is only necessary to bring down the arm
e till
a block
f, which is bolted to its side, rests upon a
roller g of a lever O which is secured in the required
position by a notched quadrant N. It will be observed that as the
lever O is moved forward from notch to notch, the plows will cut
deeper and deeper, and the reverse as it is drawn back. By these
details. the driver has entire control of the depth of the furrow
without moving from his seat or stopping the machine."
"Through a mortise in the top of
the arm
e
passes a small iron lever P, to which is attached a rod Q,
connecting it with a brake R, which acts upon one of the wheels F;
the brake R working upon a pin fixed in a block of wood or an iron
plate fastened to the front side of the
hinged board G.
The object of this brake is to facilitate the operation of lifting
the plows out of the ground when the machine is moving forward, for
by applying but a little force to the lever P, the brake is pressed
sufficiently hard to the wheel to turn the
hinged board to
the vertical position."
"The draft pole or tongue C is fastened to the underside of the
footboard M by two bolts
a' a number of holes being made,
so that the tongue may be moved to the right or left to give the
required land to the plows. The back holes
b' are made
oblong so that it can be slanted when needed. The tongue may, if
necessary, be used on either side of the draft line, and the double
tree attached to the footboard independent of the tongue. This
arrangement is chiefly for the convenience of using three horses
abreast."
"When the
hinged board G is turned down in the
horizontal position, the lever or arm I gives the chain J, which is
attached to it, considerable slack, allowing the tongue to move up
and down without influencing the plows, constituting what is
commonly called 'a limber tongue.'"
"In regard to raising the plows out of the ground, it will be
observed that the front part of the machine is lifted nearly
two-thirds of its course before the lever I tightens the chain and
commences to lift the back part. This contrivance produces an easy
motion without causing either jerk or strain upon the horses or the
machine."
"The hind plow can be raised or lowered independent of the
other; the standard B', sliding in an iron block O' and operated by
a lever, A', extending forward to the front of the seat and secured
in the required position by notches in the side of the seat
standard, as shown in Fig. 3."
"I claim as new, and desire to secure by letters patent --"
"@1. The lever P, rod Q, and brake R, arranged and operated as
and for the purpose described."
"2. The hinged board G in connection with the reversible axles,
substantially as and for the purpose described."
"3. The lever O and quadrant N for regulating the depth of the
furrow, substantially as and for the purpose specified."
"4. Lifting the hind part of the machine by means of the lever
or arm I in connection with the chain J, wheel, K, and lever, L,
these parts operating together, substantially as and for the
purpose described."
"5. Hinging the footboard M to the plow frame as described."
"6. Securing the tongue or draft pole to the footboard M in the
manner and for the purpose described."
"7. The sliding plow standard, B', guide block O', lever, A, and
notched seat standard C when used together and in connection with
the other parts."
"8. Connecting the lever L with the tongue or draft pole by
fastening it to the footboard, the whole operating together,
substantially as and for the purpose set forth.@"
"
Reissue"
"Be it known that I, F. S. Davenport, of Jerseyville, Jersey
County, and State of Illinois, have invented a new and improved
wheel plow, and I do hereby declare that the following is
a full, clear, and exact description thereof, which will enable
others skilled in the art to make and use the same, reference being
had to the accompanying drawings, forming part of this
specification."
"
The object of my invention is to provide improved means for
utilizing the draft of the team in raising a plow from the ground,
and to this end my invention consists first in the combination,
with a swing axle and ground or carrying wheel, of friction clutch
mechanism and means for engaging and disengaging the latter with
the ground or carrying wheel, said parts being constructed and
adapted to raise the plow by locking the swing axle to the carrying
wheel by friction clutch engagement, and raise the plow beam by the
draft or power of the team; second, in the combination, with a
ground wheel, a swing axle, and a plow beam connected to the
latter, of clutch mechanism connected to the axle, and adapted by
engagement with the wheel to utilize the draft of the team in
turning the swing axle into upright position, and thereby raise the
plow beam; third, in the combination, with a ground wheel, a swing
axle, and a plow beam connected to the latter, of a friction clutch
connected to the axle, and adapted, by contact with the wheel, to
turn the axle into upright position, and thereby raise the plow
beam by the aid of the draft of the team."
"
Referring to the drawings, Figure 1 is a plan or top
view of my invention; Fig. 2
is a side view of the same,
partly in section, as indicated by the line
x x, Fig. 1;
Fig. 3
is a transverse vertical section of the same, taken
in the line
y y, Fig. 1. Similar letters of reference
indicate like parts."
"This machine consists of a frame, A, made of two parallel beams
or bars
a a braced together near the front and back pieces
b b. From each of these beams or bars depends a plow B. To
the front crosspiece is bolted an iron standard C strengthened by
an iron stay D running down to the back crosspiece. To the top of
the standard C is attached a spring seat E, the whole supported
upon two wheels F F, each turning upon
a journal c of a swing
axle G."
"It will be observed that one of the
journals c is
attached to the front or upper side of the
swing axle G
and the other to the back or underside in such a manner that when
it is turned down in a horizontal position to lower the plows to
the ground, the wheel that runs in the furrow will be as much lower
than the other as the depth of the furrow may require. The
journal that carries the wheel that runs in the furrow is
so formed that it may be removed from the back of the
swing
axle and
be secured to the front, so that the machine
may run level when there is no furrow for the wheel to run in as is
the case when preparing the ground for cotton seed."
"The
swing axle G is attached to the plow frame by two
iron hinges H H', the one H on the side of the long beam forming an
arm or lever I, to which is attached a chain J, which passes over a
wheel K and is made fast to the plow frame. The wheel K turns upon
a stud in the end of a lever L, this lever being bolted to the
footboard M, which is hinged to the plow frame in the same manner
and at the same place as the axle G. To the opposite end of the
footboard is bolted a bracket or stop
d, against which
rests an arm
e, by which the
swing axle G is
operated, the arm
e being held in the vertical position by
a latch N, which is lifted by placing the foot on the back part of
it."
"Now, it will be seen that to lower the
plow to the
ground, it is only necessary to bring down the arm
e till
a block
f, which is bolted to its side, rests upon a
stop g of a lever O which is secured in the required
position by a notched quadrant N. It will be observed that as the
lever O is moved forward from notch to notch, the plows will cut
deeper and deeper, and the reverse as it is drawn back. By these
details the driver has entire control of the depth of the furrow
without moving from his seat or stopping the machine."
"Through a mortise in the top of arm
e passes a small
iron lever P to which is attached a rod Q, connecting it with a
brake R, which acts upon one of the wheels F, the brake R working
upon a pin fixed in a block of wood or an iron plate fastened to
the front side of the
swing axle G. The object of this
brake is to facilitate the operation of lifting the plows out of
the ground when the machine is moving forward, for by applying but
a little force to the lever P, the brake is pressed sufficiently
hard to the wheel to turn the
swing axle to the vertical
position."
"The draft pole or tongue Cx is fastened the under side of the
footboard M, by two bolts
ax, a number of holes being
made, so that the tongue may be moved to the right or left to give
the required land to the plows. The back holes
bx are made
as oblong
slots, so that
the tongue can
be slanted when needed. The tongue may, if necessary, be used on
either side of the draft line, and the double tree, attached to the
footboard independent of the tongue. This arrangement is chiefly
for the convenience of using three horses abreast."
"When the
swing axle G is turned down in the horizontal
position, the lever or arm I gives the chain J, which is attached
to it, considerable slack, allowing the tongue to move up and down
without influencing the plows, constituting what is commonly called
a 'limber tongue.'"
"In regard to raising the plows out of the ground, it will be
observed that the front part of the machine is lifted nearly
two-thirds of its course before the lever I tightens the chain and
commences to lift the back part. This contrivance produces an easy
motion, without causing either jerk or strain upon the horse or the
machine."
"The hind plow can be raised or lowered independent of the
other, the standard, B', sliding in an iron block, O', and operated
by a lever, A', extending forward to the front of the seat, and
secured in the required position by notches in the side of the seat
standard, as shown in Fig. 3."
"
Having fully described my invention, what I claim as
new, and desire to secure by letters patent,
is --"
"1. @In a wheel plow, the combination, with a swing axle and
ground or carrying wheel, of friction clutch mechanism, and means
for engaging and disengaging the latter with the ground or carrying
wheel, said parts being constructed and adapted to raise the plow
by locking the swing axle to the carrying wheel by friction clutch
engagement, and raise the plow beam by the draft or power of the
team, substantially as set forth."
"2. In a wheel plow, the combination, with a ground wheel, a
swing axle, and a plow beam connected to the latter, of clutch
mechanism connected to the axle, and adapted, by engagement with
the wheel, to utilize the draft of the team in turning the swing
axle into upright position, and thereby raise the plow beam,
substantially as set forth."
"3. In a wheel plow, the combination, with a ground wheel, a
swing axle, and a plow beam connected to the latter, of a friction
clutch connected to the axle, and adapted, by contact with the
wheel, to turn the axle into upright position, and thereby raise
the plow beam by aid of the draft of the team, substantially as set
forth.@"
The answer sets up, among other defenses, noninfringement and
that the reissued patent is invalid because not for the same
invention as the original. On a hearing on proofs, the circuit
court entered a decree which finds that the equities are with the
defendants, and that they do not infringe on the rights of the
plaintiff, and dismisses the bill. The plaintiff has appealed to
this Court.
By the opinion of the circuit court in the case, 14 F. 465, it
appears that the defenses of noninfringement and of the invalidity
of the reissue were sustained. Infringement is not asserted in this
Court as to any claim of the reissue but the first.
In regard to the subject matter of that claim the specification
of the reissue states that the invention consists
"in the combination, with a swing axle and ground or carrying
wheel, of friction clutch mechanism, and means for engaging and
disengaging the latter with the ground or carrying wheel, said
parts being constructed and adapted to raise the plow by locking
the swing axle to the carrying wheel by friction clutch engagement,
and raise the plow beam by the draft or power
Page 119 U. S. 383
of the team."
The first claim of the reissue uses the same language, with the
prefix of the words "In a wheel plow," and the addition at the end,
of the words "substantially as set forth."
The other alterations made in the specification are that
"
gang plow" is changed into "
wheel plow;"
"
iron axle" into "
journal;" and "
hinged
board" into "
swing axle."
The first claim of the original patent is for a combination of
the lever P with the rod Q and the brake R. When force is applied
to the lever P, motion is communicated through the rod Q to the
brake R, which brake acts on the periphery of one of the two
supporting or carrying wheels F, the axle of which
c is
attached to a hinged board G and by the action of the brake the
hinged board is changed from a horizontal position to a vertical
position, and the effect is to facilitate the operation of lifting
the plows out of the ground. The first claim of the original patent
covers only the combination of the three specific devices -- the
lever P, the rod Q, and the brake R. The first claim of the reissue
calls the brake R "friction clutch mechanism," and calls the lever
P and the rod Q "means for engaging and disengaging the latter with
the ground or carrying wheel," and then claims the combination of
four things: (1) friction-clutch mechanism (2) means for engaging
and disengaging it with the ground or carrying wheel (3) a swing
axle (4) a ground or carrying wheel.
The hinged board G of the plaintiff's original patent is ten or
twelve inches wide, and at each end of it is a spindle for one of
the two ground or carrying wheels to run on, the spindles being in
line with one edge of the hinged board. The forward ends of the
plow beams are attached by joints to what is the back edge of the
hinged board while that board is horizontal, so that, when it comes
to be vertical by the action of the brake and the forward movement
of the team, the forward ends of the plow beams are raised in
height a distance equal to the width of the hinged board, lifting
the plows.
The defendants' machine is thus described in the opinion of the
circuit court, and the description is conceded by the counsel for
the plaintiff to be a fair one:
"The defendants' machine
Page 119 U. S. 384
is a wheel or sulky plow, with a bent or cranked iron axle upon
which the plow beams are pivoted at about two-thirds of the
distance from the forward end to the coulter, so that the plow is
nearly balanced upon the axle or crank, and the arrangement of the
mechanism is such that when the plow is running or operating in the
ground, the crank part is in a horizontal position, and when it is
desired to raise the plows out of the ground, the crank is turned
upward toward a vertical position, whereby the forward ends of the
beam are raised until the point of the plow runs out of the ground.
After the forward end of the beam has risen to a certain point, it
strikes a stop, so that when the crank has resumed a vertical
position, the plow is balanced across the crank part of the axle,
thus sustaining the plow at the height above the ground of the
crank when in a vertical position. This turning of the crank axle
so as to lift the plow is accomplished by a friction band or brake,
which is made to engage with an inner extension of the hub of one
of the carrying wheels so that as the wheel moves forward it causes
the crank axle to turn upward from a horizontal to a vertical
position."
The circuit court was of opinion that if the state of the art
was such as to entitle Davenport to a broad claim for any device by
which the plow is lifted by the power of the team through a brake
or friction clutch, the defendants' machine would infringe. But the
court found that prior to Davenport, devices had been used in
agricultural implements for utilizing, by means of a brake, the
motion of the carrying wheel through a crank axle in raising
operative parts of the machine from the ground, which devices were
so alike in structure and so analogous in use to those of Davenport
as to require his claims to be limited to his specific devices. In
view of those prior devices, the court held that the defendants'
friction band could not be regarded as the same means for engaging
and disengaging the carrying wheel and the axle as the brake of
Davenport, and that the defendants' crank axle was not the
plaintiff's hinged board. In these views we concur.
The reissue was applied for more than thirteen years after the
original was granted, and after the defendants had begun
Page 119 U. S. 385
to make machines of the pattern now complained of. The original
patent did not make a swing axle and a carrying wheel elements in
the combination of the first claim of that patent. The reissue was
evidently taken to cover the defendants' machine, which did not
infringe the first claim of the original patent because it did not
have the Davenport brake R. No mistake or inadvertence is shown.
The plaintiff, in his testimony as a witness, assigns as a reason
for the reissue that he thought there "was a mistake and a
deficiency in the patent," that he did not consider that other
manufacturers respected it, that he considered it deficient because
it applied the friction brake to the periphery of the wheel, and
that he believed the patent was entitled to cover different
friction clutch devices, so as to be a better protection against
infringers.
Without pursuing the subject further, we are of opinion that,
within numerous decisions of this Court, the reissued patent is
invalid as respects its first claim.
Decree affirmed.