Machinery for Exerting Pressure Ciroumferentially upon Annular and Cylindrical Objects, and for Fixing Tyres on Wheels.
Year: 1897

page_text: Date of Application, 2nd Apr., 1897-Accepted, 26th June, 1897
Machinery for Exerting Pressure Ciroumferentially upon Annular
and Cylindrical Objects, and for Fixing Tyres on Wheels.
I, CARL HUBER, of I Graben No. 28, Vienna, Austria, Engineer, do hereby
declare the nature of this invention aud in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statoment:-
My invention relates to an improved construction of machinery for exerting
pressure circumferentially upon annular and cylindrical objects, wherein a strong
flexible metallic chain or band is passed round the said object and has its ends
acted upon by the plungers of two hydraulic cylinders arranged opposite each
other, so that on admitting fluid pressure to the said cylinders, the plungers in
being made to advance towards each other, draw the band or chain with sufficient
force round the annular or cylindrical object to compress it to the required extent.
In carrying out the invention I prefer to place between the annular or cylindrical
object and the compressing band or chain a steel band, the ends of which are
provided with strong lugs through which is passed a screw bolt, 80 that when the
object has been compressed to the required extent, the said band is secured tightly
round the same by means of the screw bolt so that on removing the object from
the compressing chain, the said band will maintain the object in the compressed
condition until it is farther treated in any desired manner.
The machinery may be arranged in various ways for carrying my said invention
into practice; by way of example I will describe an arrangement thereof for
operating simultaneously upon two aubular or cylindrical objects, as shewn on the
accompanying drawing, in which Figure 1 shews a front elevation partly in section
and Figure 2 an end view of a machine for compressing leather tyres of the
kind described in the Specification to Patent No. 5692 of 1895 on to the rims of
wheels, the machine being arranged to operate simultaneously upon two wheels
The frame A carries two opposite hydraulic cylinders B B the action of w⚫ose
plungers C may advantageously he controlled by a screw device D D operated by
hand wheels D through gearing D' in a similar manner to that described in the
Specification to my Application for Letters Patent No. 28865 of 1896, that is to
say, the threads of the screws D are made with a pitch whose angle is slightly less
than the slipping angle so that when turned with a slight exertion of force, they
will allow the pistons to be set in motion by the fluid pressure. On each side of
the bydraulic cylinders B B are niounted axes E E on which are placed the
wheels FF that require to have the leather tyres G G compressed on to their rims.
Round these tyres are first fitted steel bands H H the ends of which are provided
with lugs H through which are passed screw bolts I and between the onds of H
and the leather tyre Gare fitted filling pieces K so that on tightening up the screw
bolt the piece K is made to press upon and keep in position that part of the tyre
which is not covered by the band H. Round the bands H H of the two wheels is
placed a strong endless chain L arranged so as to surround the greater part of
each tyre and to pass in two loops L' L' from the one wheel to the other. The
ends of the plungera C of the hydraulic cylinders are provided either with roller M
as shown, or with a rounded surface upon the loop L' of the chain L, so that upon
he plungers being forced forward they press inwards the parts L' of the chain L
nd thus cause this to be drawn gradually tighter round the wheels, thereby
compressing the leather tyre on to the rim. When this compression has been

page_text: effected to the required extent, the bolt I is screwed up so as to tighten the band H
round the tyre, after which the wheel can be removed, to be farther treated in the
kuown manner for securing the tyre on the wheel rim.
If desired, a uniform compression of the tyre round its entire periphery may bo
insured, by slackening back the plungers of the hydraulic cylinders after a certain
compression has been effected, so as to relieve the tyre of pressure, and then, after
turning the wheel partly round within the band H, again applying the pressure to
the chain L, and this may be repeated as often as may be necessary.
Although I prefer to arrange the machine for operating simultaneously upon two
wheels or other circular or cylindrical objects, yet it will be obvious that it may
be constructed for operating upon a single object only, in which case the chain L,
instead of being endless, would have its ends pivoted respectively to lugs on the
two plungers so as to be drawn together by the advance of these. Such a
construction of the chain can also be applied to the double arrangement as in the
modification shown in plan at Figure 3.
In this cases the axes EE carrying the wheels FF are fixed vertically upon
the bed plato A of the machine, so that the wheels Fare horizontal. Round the
tyre of each wheel is passed, firstly, a metal band H, as in the first arrangement,
and then a separate length of chain I, the ends of which are provided with book
shaped attachments that engage with hook shaped lugs C¹ on the heads of the
plungers of the hydraulic cylinders B, so that on forcing these forward they
draw the chains tight round the wheel tyres as before. D D are the controlling
screw devices as in the first described construction.
The machine may also be adapted for effecting the pressing inward of tho aides
of the trough-shaped rim of the wheel for securing the tyre thereon after it has
been compressed, as shewn at Figure 4, which is a side view of the machine shewn
at Figure 3 with the necessary additions.
For this purpose there are fixed on the top of the hydraulic cylinders B
brackets N upon which is mounted the axis of one of the wheels after the
tyre G has been compressed thereon, and while it is still secured by the band H.
The wheel is suspended at such a height that the lowest part of its trough-shapod
rim O will be situated exactly on the same level as the two pressing tools P fixed
on the upper sides of the plunger heads C', so that on these being caused to advance
by the hydraulic pressure they will press inwards the portion of the sides of the
rim situated between them, so as to grip the dovetail shaped inner periphery of
the tyre G. On the completion of such pressure, the plungers C are slightly
withdrawn and the wheel F having been.turied round to the required extent, the
following portion of the rim is compressed in like manner, and so on.
When the cylindrical surface of the object to be compressed is of some width,
a modification may be employed as indicated at Figure 5. In this case the band
or chain is passed right round the object F, and the ends thereof, after passing
each other side by side, are attached to the piston rods of hydraulic cylinders B
80 that on admitting fluid pressure to the front sides of the pistons, these in being
forced backward and thus exerting a pull on the chain cause this to exert the
requisite compression upon the object.
It will be evident that the above described machine can be employed for exerting
compression round the periphery of cylindrical or annular objects for a variety of
purposes, such as, for instance, for compressing the one end of a cylindrical boiler
section for fitting into the end of another section before rivetting; also for bringing
together the two ends of au iron or steel hoop for securing them together by
welding or othorwisc.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
-
1. In a machine for exerting pressure circumferentially upon annular and
1 "
"
C

page_text: metal band or chain which is passed round the object to be compressed and is 80
arranged in connection with the plungers or pistons of the cylinders that on these
being made to exert a strain on the chain, this is contracted round the object so as
to exert the required compression thereon, substantially as described.
2. In the machine referred to in the preceding claim, the use of a metal band
which is fitted round the annular or cylindrical object underneath the compressing
chain or band and has its euds tightened up by a screw bolt, so as to retain the
object in the compressed condition after it has been released from the compressing
chain, substantially as described.
3. In a machine for exerting pressure circumferentially upon annular and
cylindrical objects, the combination with two opposite hydraulic cylinders of an
endless metal band or chain which is passed round two circular or cylindrical
objects to be compressed, situated on each side of the hydraulic cylinders, the
plungers of which are made to press upon the parts of the chain situated between
the two oircular objects so as to tighten the parts extending round such objects and
thereby to exert compression thereon, substantially as described.
4. In a machine for exerting pressure circumferentially upon circular or
oylindrical objects the combination of two hydraulic cylinders BB with
plungers CC, an endless chain L adapted to be passed round the peripheries of
the circular or cylindrical objects such as F, and acted upon at the middle part
by the plunger C, a steel band H also passed round the object underneath the
chain L and having its ends tightened by a screw bolt, and a filling piece K
bearing against the part of the periphery of the object F which is not acted upon
by the chain L, substantially as described with reference to the drawings.
5. The modification of the machine referred to in Claims 3 and 4 wherein
separate chains L are passed round each of the wheels F, and have their enda
suitably engaged with the plungers of the hydraulic cylinders, substantially as
described with reference to Figures 3 and 4 of the drawings.
6. The combination with a machine for compressing tyres on to the rims of
wheels, such as is herein described of tools attached to the plungers of the hydraulic
cylinders, adapted to press inwards the sides of the trough-shaped wheel rims after
the tyres have been compressed thereon, substantially as described with reference
to Figuro 4 of the drawings.
1
1005
ABEL & IMRAY,
Agents for the Applicant.