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Dec. 17, 1946.,
I
J. FALLON
2,412,724
' QONVEYER MECHANISM vFOR FURNACES AND OTHER APPARATUS
Filéd Dec. 28, 1944
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Dec. 17, 1946.
J. FALLON
CONVEYER MECHANISM FOR FURNACES AND 0THER
Filed Dec. 28, 1944
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APPARATUS
2,412,724
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Dec. 17, 1946. V
J. FALLON
2,412,724
CONVEYER MECHANISM FOR FURNACES AND OTHER APPARATUS
Filed Dec. 28, 1944
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Patented Dec. 17,‘ 1946
2,412,724
UNITED STATES PATENT OFFICE
2,412,724
CONVEYER MECHANISM FOR FURNACES
AND OTHER APPARATUS
John Fallon, Smethwick, England
Application December 28, 1944, Serial No. 570,167
'
In Great Britain June 27, 1944
5 Claims.
( Cl. 214-18)
1
This invention has reference to improvements
in and connected with conveyor mechanism for
furnaces and other apparatus, and is more par~
ticularly applicable for the conveyance of goods
through furnaces at elevated temperatures say
between the range of 500° C. and 1200° C. when
numerous di?culties and problems are experi
enced which are well recognized in the art.
2
tory material in the usual manner and the tun
nel or chamber therethrough contains a roller
hearth which is formed of a plurality of separate
rollers a in parallel disposition in close proximity
in a horizontal plane.’ These rollers are formed
of nickel chrome steel having a high heat re
sistant characteristic, each roller having a pro
jecting end a1 extending beyond collars 11.2. The
projecting ends a1 are located within open-ended
The object of the present invention is to pro
vide a roller platform or hearth for the support 10 slots 121 formed
longitudinally disposed chan-_
of the goods to be traversed through the furnace,
nel brackets I; connected by bolts 0 to [the side
the goods being say of an irregular size and char
walls of the furnace. The peripheries of the pro
acter, to which it is desired to apply heat treat
jecting ends a1 of the rollers normally rest in the
ment conditions for a predetermined period dur
arcuate bases of the open-ended slots b1 and are
ing the traverse of such goods particularly 15 adapted [to be rotated within these slots when
through the hot zone of the furnace, which will
raised as will be hereinafter described. The pair
avoid not only any possibility of damage to the
of collars a2 forming a part of each roller a. are
goods themselves but will also provide a trans
superposed above a. pair of longitudinally ar
mission mechanism which will not be subject to
ranged beams d which extend through the length
distortion or other defects arising from the sub 20 of the furnace chamber below the run of the
jection of the mechanism [to such high tempera
series of rollers Ct, a slight gap normally existing
ture conditions within the furnace which would
between :the periphery of each collar and the
ordinarily involve marked di?iculties in such
upper edge of the beam as clearly seen in Figs.
transmission and conveyance.
1 and 2 of the drawings. The beams 01 are
The invention consists of a conveyor mecha 25 mounted on flanged rollers e which rollers are
nism for furnaces and other apparatus, involving
rotatably and traversably mounted on a. slotted
the combination of a roller platform with a recip
head cap I which is mounted on and forms the
rocal lifting and lowering beam mechanism,
upper part of a plunger 9' adapted for ventical
which will impart to the rollers an intermittent
reciprocal motion within guide brackets h form
rotary feed motion, said rollers being supported
ing part of the framework of the furnace. The
upon bearings when in their lowest position, the
lower end of each plunger is pivotally connected
feed motion being imparted to the rollers con
by means of a link :i to the one arm of a coun
stituting the platform when the rollers are lifted
terweighted three-armed lever k, the counter
free of their hearing support.
I
weight being designated W. The third arm 7:2
The invention will now be described with par 35 of this lever‘ has pin and slot or equivalent cou
ticular reference to the accompanying drawings
pling with a shaft Z the axis of which is in par
which illustrate one means of carrying the inven
allel disposition to and disposed below the beam 02.
tion into practice ‘as applied to what may be
Referring more panticularly to Fig. 5 of the draw
termed a roller hearth furnace for effecting the
lngs the head cap f is formed on its upper face
intermittent conveyance of goods through the
with a horizontal bearing surface f1 on which
furnace at the desired speed.
the trunnions or integral spindles e1 of the
In the drawings:
?anged rollers e are adapted to rest and along
Fig. 1 is an end elevation through a section of
which surface f1 they can traverse in order to
the furnace incorporating the essential features
provide a substantially frictionless mounting of
of the mechanism comprising the present inven
the rollers e on the top of the plungers g. A
tion.
top closure plate 12 is provided to prevent any
Fig. 2 is a sectional side elevation of the mech
jumping of the rollers off the surface f1. The
anism seen in Fig. 1.
lower edges of the sides and the base of each
Fig. 3 is an end elevation through the same
beam (1 are located within the annular ?anges of
section of the furnace as that seen in Fig. 1, but 50 the rollers 6 so as to maintain a track alignment.
illustrating the roller hearth conveyer mecha
nism in its raised position.
Fig. 4 is a sectional side elevation of the mech
anism in the position seen in Fig. 3.
The operation of the mechanism forming the
essential feature of the present invention is as
‘Fig. 5 is a detailed View showing the means :
for rotatably and traversably mounting one of
the ?anged rollers forming the support for the
lifting and lowering traversable beam which is
associated with the roller hearth.
The furnace walls are constructed of a refrac
follows:
Referring ?rst more particularly to Figs. 1 and
2 which illustrate the mechanism in its normal
non-traversing position when the work may be
said to be mounted on the peripheries of the now
static series of rollers a, it will be seen that there
is no contact between the upper faces of the
60 beams d and the peripheries of the collars a2
2,412,724
4
plungers, said plungers being connected to a
forming rigid or integral parts of the rollers a.
When the desired interval of time permitted by
the cam-controlled operating mechanism con~
nected to the shafts Z and to the beams d has
rocking lever and linkage _ mechanism which
serves to transmit and effect the required lifting
and lowering motion of the beams and rollers.
2. A conveyer mechanism for furnaces and
other apparatus, comprising in combination a
roller hearth consisting of a series of parallel
rollers in close proximity located in a horizontal
passed, the beams d and rollers a assume the con
tacting position seen in Figs. 3 and 4, the longié ‘
tudinal motion of the shaft I being communicat
ed through the arm 102 to the three-armed coun
plane, said rollers being supported within elon
terbalanced lever is with the result that through
the link 7' the plunger g is lifted and through the 10 gated slots formed in brackets secured to the side
walls of the furnace chamber, a pair of parallel
?anged rollers e raises the pair of beams d so that
beams adapted for reciprocal and rising and
falling motion said beams co-operating with the
their upper faces contact the peripheries of the
collars a2 and lift the rollers a in the slots b1 to
the position seen in Figs. 3 and 4, when a cor
series of rollers forming the roller hearth of the
responding longitudinal traversing motion is 15 furnace, anti-friction supporting means for the
beams rotatably and traversably mounted on
communicated through the linkage connecting
plungers, said plungers being pivotally connected
the beams and the cam controlled operating
through linkage and rocking levers to a’ reciproe
mechanism in the direction of the arrow (Fig. 4)
cally traversable shaft which traversing motion is
with the result that an anti-clockwise rotation is
imparted to the rollers a which results in the pro 20 imparted in synchrony with the traversable
gression of the goods supported on the peripher
motion of the said beams from a power unit. ,
3. A ‘conveyer mechanism for furnaces and
ies of these rollers through the furnace for a
other‘ apparatus, comprising. in combination, a
predetermined distance. The continued opera
roller hearth consisting of .a series of parallel
tion of the cam controlled mechanism then
rollers in close proximity located in a horizontal
vserves to lower the beams d and the supported
plane, said rollers being supported within elon
rollers a until the rollers assume the position
gated slots formed in brackets secured to the side
seen in Figs. 1 and 2 of the drawings, when a lon
walls of the furnace chamber, a pair of parallel
gitudinal motion in a reverse direction as indi
cated by the arrow in Fig. 2 is imparted to the
beams adapted for reciprocal and. rising and fall
mg motion, said beams co-operating' with the
beams and the shaft 1 after the beams have been
lowered from contact with the peripheries of the
series of rollers forming the roller hearth ofrthe
furnace, flanged roller supporting means for the
beams rotatably and traversely mounted, on
collars a2, i. e. in the position seen in Figs. 1 and
2 of the drawings. This cycle of intermittent
lifting, progressing, lowering and return motion
plungers, said plungers being pivotally connected
continues throughout the whole period of oper
ation of the furnace. Thus the goods are inter
through linkage and rocking levers to a recipro
sally traversable shaft to which traversing motion
is imparted in synchrony with the traversablc.
mittently traversed and progressed in predeter
mined steps through the furnace from the recep
tion to the delivery end of the tunnel or chamber
motion of the said beams from a power unit oper
ating a rotatable cam to which said beams an
in which the heating or other treatment exists. 40
'The cam controlled mechanism for effecting a
synchronized longitudinal motion of the shaft Z
and of the pair of parallel beams dis of the char
acter described and illustrated in the speci?ca
tion of the United States Patent No. 1,909,906,
It will be appreciated that the foregoing mech
anism dispenses with the usual continuous or in
termittent drive connected to each roller orsec
tion of vrollers forming the hearth of the furnace
or other chamber, and that during the period
when the rollers are being rotated they are lifted
free of their normal static bearings or supports
and thus the mechanical effort required to rotate
the rollers in the forward or progressive feed di
rection is a minimum, and that during the major
active period of the heat treatment of the goods
upon the platform or hearth the rollers are rest
ing on and are supported by the ?xed bearings ‘
' in the brackets as already described, and are thus
restrained from distortion due to any elevated
temperature conditions obtaining within the fur
nace.
shaft are linked.
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ii. A conveyer mechanism forfurnaces com
prising in combination a roller hearth formed
as a series of parallel metallic rollers having a
high heat resistant characteristic, said rollers
being located in close proximity one to another
in a horizontal plane, a pair of collars provided
adjacent the ends of said rollers,'vertical1y slotted
bearing brackets secured to the side walls of the
so
furnace, a pair of longitudinally arranged parallel '
beams located below said collars and normally out
of engagement therewith, a ‘series of ?anged
rollers supporting said beams, slotted head caps
adapted to rotatably and traversably support the
spindles of the ?anged rollers, vertically recipro
cal plungers forming a mounting for the said
head caps and flanged rollers, pivotal link and
lever connection between said plungersjand' a
reciprocal shaft, said shaft and beams being linked
to a synchronising cam operated-unit whereby
60 the required cycle of intermittent lifting, travers
ing, lowering and return traverse motions of the
mechanism is obtained.
'
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,
' I claim:
5. A conveyer mechanism for furnaces and
1. A conveyer mechanism for furnaces and
other apparatus, comprising, in combination, .a
other apparatus, comprising in combination a 65 series of rollers forming a platform, a support
roller hearth consisting of a series of parallel roll
for the rollers, guides for retaining the rollers.
ers in close proximity located in a horizontal
against horizontal displacement, a movable beam
plane, said rollers being supported within elon
extending beneath the rollers, and means for rais
gated slots formed in brackets secured to the side
ing the beam to lift the rollers off said support,
walls of the furnace chamber, a pair of parallel
then moving the beam horizontally to rotate the
beams adapted for reciprocal and rising and fall
rollers in their guides andthen lowering the beam
7 ing motion said beams co-operatingv with‘ the se
ries of rollers forming the roller hearth of the
furnace, anti-friction supporting means for the
beams; said means being rotatably- mounted on
to return the rollers to said support.
I _
‘JOHN FALLON. I
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