Improvements in Machinery for Moulding Pullies.
Year: 1889

page_text: Date of Application, 9th Mar., 1889
Complete Specification Left, 30th Aug., 1889-Accepted, 5th Oct., 1889
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Moulding Pullies.
I, HUGO LAISSLE of Reutlingen Würtemberg Germany, Civil Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improved machinery for moulding pullies whereby pullies
of various diameters whether of one piece or divided and whether having one set or
several sets of arms can be expeditiously and accurately moulded.
For this purpose the moulding machine is constructed with a framing consisting of
an upper and a lower part bolted together; in the upper part are situated a number of
metal rings fitting concentrically closely one within the other, each of which rings
represents the half mould of the rim of a pulley of corresponding diameter.
These rings are all of the same depth, so that their upper and lower ends form
together a flat surface; they are capable of being slid separately upwards into a half
mould box which is placed temporarily on top of the framing, the extent to which
they are thus raised being equal to one half the width of the pulley rim to be
moulded.
The central space within the mould ring of smallest diameter is filled out with a
cylindrical piece, the upper surface of which together with the surface formed by the
upper ends of the rings and an annular flange on the frame beyond the outermost
ring, constitute the bottom plate of the half mould box. The central piece as also the
concentric rings are carried by brackets projecting radially from the circumference of
the lower part of the casing and intermediately between these brackets are vertical
supports formed of thin plates the lower ends of which are carried as will be presently
described, while the upper ends are.
formed with a dovetail head fitting into corre-
sponding dovetail notches in the lower edges of each of the rings. These notches
constitute continuous dovetail radial grooves in which the dovetail heads of the
supports can slide radially, until they are brought beneath the particular ring which is
of the diameter required for the pulley to be moulded, so that by then raising the
supports they push up the said ring from between the two contiguous ones, so as to
make it project into the mould box as described.
The arrangements for imparting the said radial and vertical motions to the supports
are as follows:-The lower ends of the supports are fixed to blocks that can slide in
radial slots formed in arms projecting radially from a central ring that is carried by a
vertical cylinder capable of moving up and down in a central cylindrical part of the
framing. This cylindrical part of the framing carries, rotatable on a flange near its
upper end, a circular plate which is situated just below the under side of the sliding
blocks of the supports, and it is provided on its upper face with a continuous spiral
groove or grooves into which take pins projecting down from the said blocks, so that
by rotating the said plate by suitable toothed gearing the said blocks with the supports
can be moved radially to bring the latter under any particular ring as described. To
the one sliding block is fixed an outward projecting arm having a scale of inches or
other measurement marked thereon corresponding to the diameters of the different
rings, so that on moving the supports radially until the scale indicates against a fixed
index the exact diameter required, the supports will have been brought exactly under
the corresponding ring. The spindle of the toothed gear that effects the rotation of
the grooved plate is provided with a ratchet wheel with which engages a spring pawl
The supports
so as to hold the plate in the position into which it has been moved.
having been brought under the ring to be raised, the cylinder carrying the radial arms
on which rest the supports is now moved upwards, such motion being effected by

page_text: means of a toothed rack fixed thereto, with which gears a pinion on a shaft that is
rotated by a hand wheel. For raising the ring to the exact height required for the
half mould, a vertical scale of inches is fixed on the casing, against which the before
mentioned arm carrying the horizontal scale slides until it arrives at a division
indicating the width of pulley required.
The ring is then secured in this position by means of a screw clamping device
attached to the hand wheel of the raising and lowering shaft and taking into a fixed
slotted quadrant.
A pattern of the half boss and arms of the pulley having been placed upon a centre
pin on the cylindrical piece within the pattern ring in the mould box, the moulding
is then effected in the usual manner either by ramming by hand or by a press, and
after this is completed, the pattern ring is lowered again, by lowering the supports,
which draw the ring down by their dovetail heads.
rods are
For then raising the mould box off the pattern of the half boss and arms,
provided passing vertically down through the upper frame and resting with their
lower ends on inclines formed on a ring in the framing that can be turned by hand.
The mould box fits with lugs on the upper ends of the rods which have collars
bearing against the lugs, so that on rotating the said ring with inclines the rods are
pushed up and are thus made to raise the mould box off the pattern, whereupon the
mould box is removed and the production of the second half mould is proceeded with
in the same manner.
In order to insure that the rings shall not shift in a circular direction, so that their
notches shall always form a continuous dovetail groove as described one of the
brackets that carry them is formed with its supporting edge of a ▲ shape or other
suitable form fitting into a correspondingly formed notch in each of the rings, so that
if the raised ring should have slightly shifted, it will in descending be brought back
to its correct position by the A edge entering the notch.
In order to prevent a sharp concussion when the raised parts descend upon their
supports again, there is provided in the lower end of the cylindrical part of the casing
a spring buffer which is slightly compressed by the lower end of the raising cylinder
as it arrives in its lowest position.
Dated this 9th day of March 1889.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Machinery for Moulding Pullies.
1, HUGO LAISSLE, of Reutlingen, Wurtemberg, Germany, Civil Engineer, do
hereby declare the nature of this invention and in what manner the same is to he
performed to be particularly described and ascertained in and by the following
statement
This invention relates to the construction of a machine for moulding in a rapid and
perfect manner pullies of different diameters and of any desired width, having one or
more sets of radial or curved arms.
This machine consists essentially of the following parts, which are shewn on the
accompanying drawings, the combined action of which will be hereinafter described.
1. A cylinder 1 cast in one or more parts.
.

page_text: 10. A device 41, 33, 32, 30, 29, 28, for raising, lowering and holding the
cylinder 26.
11. A device 31. 25. 23. 22. 21. for turning and holding the disc 20 with spiral
grooves.
12. A cylindrical casing 2 with moveable steady pins 5.
13. A half pattern for the pulley boss and armis.
14. The mould box 10.
In the accompanying drawings Fig. 1 shews a vertical section of the moulding
machine, on line A B Fig. 2. Fig. 2 a part sectional plan on line a b c d Fig. 1;
Fig. 3 a part sectional plan on the line e f g h Fig. 1; Fig. 4 a vertical section on
linem Fig. 2 with part of one of the pattern cylinders or rings 3, ring carrier 16,
three armed support 18 and spiral disc 20'; Fig. 5 is a section on line n-o fig. 3 of one
of the supports 15 for the pattern rings.
For describing the action of the machine, I will assume that it is desired to form
the mould of a pulley of 174 inches diameter, 4 inches width, and a hole in the boss
of 2 inches diameter with five straight arms.
The three ring carriers 16 are in the first place moved into the position correspond-
ing to that of the ring 3 having a diameter of 17 inches which is effected as follows.
By turning the hand wheel 25 in the one or the other direction, the disc 20 with spiral
grooves 47 will be rotated on the casing 27 by means of the bevil gearing 21.
Into the grooves 47 enter the extended ends of the ring carrier screws 17, so as to
be moved by their rotation.
The screws 17 being fixed to the part 16×, the bearers will be caused by the action
of the spiral dise to travel in a rectilinear direction in the slots 44 of the three armed
piece 18, either towards or away from the centre.
Simultaneously with this motion the head 40 Figure 4, of the carrier 16 will move
through dovetail notches 40 formed in the lower edges of the pattern rings 3, and in
order that there may be no obstructions to this movement the three sets of such
notches must be accurately formed by planing so as to form continuous grooves.
As in consequence of the spiral groove the carriers 16 will follow each other in a
corresponding spiral line they are brought to the concentric position by consecutively
fixing them by the screws 17. The hand wheel 25 is rotated until the scale bar 34 on
which the diameters of all the rings are marked and which is fixed to one of the
slides 16×, are brought into the position indicating the required diameter (i.e. 174 in.)
against a fixed marking edge on the casing.
At this point the described mechanism is then held securely by a ratchet wheel 22
and pawl 23. In order now to raise the pattern ring to the height corresponding to
the width of the pulley, the wheel 41, shaft 30, and pinion 29 are rotated, after
loosening the screw clamp 33, whereby the toothed rack 28, cylinder 26, the carrier
support 18 resting thereon, and the carriers 16 are raised until the scale bar 34 is
brought to the division 4 on the vertical scale 35.
As the pattern to be formed must correspond to only one half the width of the
pulley, the figure 4 inches on the scale will in reality only indicate one half that
dimension. The carriers 16 having been previously brought underneath the ring
of the required diameter as described, the raising thereof will effect the raising of such
ring to the required height of 24 inches, and it is secured in this position by clamping
the hand wheel 41 by the screw 33, which passes through a segmental slot in the piece 32,
fixed to the framing 1 by a screw bolt 35*.
This being done, the central boss 13 with arms 14 corresponding to the diameter of
the ring (there being one set for each ring) is placed upon the central pin 38. The
boss 13 is separate from the rosette for the arms so that it may be varied according to
the diameter of the shaft boring; if the pattern is intended for divided pullies, the
boss is formed with suitable flanges.
The machine being thus prepared, a suitably sized mould box 10 having three lugs,
is mounted on the studs 5, and suitably formed sand carriers are fitted adjustably in

page_text: the slots 39, after which the box is charged with sand either. rammed in or pressed by
a press. The mould box remains on the pattern until the ring 3 has been lowered
into its original position again, this being effected as follows :-
:-
The three ring carriers 16 being formed with a dove fail head 40 fitting in a dove-
tail groove on the ring with a slight play as described, the ring will be drawn down
thereby when the carriers are lowered by the before described mechanism after
loosening the screw clamp 33.
In order to prevent any injurious concussion on lowering the moveable parts, more
particularly in regard to the dovetail heads 40 and notches in the rings, the lower end
of the cylinder 26 bears against and compresses the caoutchouc buffer 37 in the
bottom of 36, just before it arrives at the end of its motion.
In order to prevent any turning of the pattern rings 3 relatively to each other,
whereby the accuracy of the dovetail grooves would be destroyed, the one of the
supports for the rings, namely 15º, is formed angular at top as shewn at Fig. 5, and
the rings are formed with a corresponding angular notch, so that should a pattern
ring be shifted slightly round in being raised and lowered it will be brought accurately
into position again by the angular edge of 15ª in descending.
The other two
supports 15 for the rings may be flat.
As shewn at Fig. 1, the pattern rings 3 form at top collectively the surface for the
mould, in combination with the part 2, the central part within the smallest sized ring
being filled in with the part 4 carried by the supports 15 and having the pin 38 fixed
in it.
After completion of the moulding, the mould box has to be raised off the boss 13;
this is effected by turning the ring 7 by means of the bandle 8, whereby the pins 5
are pushed up by inclines 9 on the ring 7, the pins having collars as shewn, bearing
against the underside of the lugs of the mould box, whereby they raise the latter off
the boss 13. The mould box can now be removed by hand.
Should pullies be required of greater thickness in the rin than the patterns 3,
either two such rings may be raised simultaneously or the ring, when raised may be
thickened by moveable cheeks.
The arms can also be thickened by placing suitable packing pieces under the
rosettes.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In a machine for moulding pullies, the use of a series of rings or cylinders 3 of
different diameters serving as the pattern for the pulley rim, fitting closely within
each other, in combination with radially and vertically moveable carriers 16 whereby
for forming the mould of a pulley of a certain diameter, the pattern ring of the
corresponding diameter is raised up to the required height above the others, so as to
serve in combination with patterns for the arms and boss, the required half pattern
for the pulley projecting above the surface formed by the upper edges of the other
pattern rings, substantially as herein described.
2. In combination with the pattern rings 3 and carriers 16 referred to in the pre-
ceding claim, the dovetailed heads 40 of the carrier fitting in dovetail notches in the
rings, the radially removeable slides 16× supporting the carriers and the rotatable
dise 20 with spiral grooves for radially adjusting the position of the slides and carriers,
substantially as herein, described.
3. In combination with the pattern rings 3 carriers 16, slides 16* and grooved disc 20
referred to in the preceding claim, the slotted arm 18, cylinder 26, rack 28, pinion 29,
shaft 30, spindle 31, and bevil pinion 21 for supporting raising and lowering the
bearers and pattern rings, and for rotating the grooved disc, substantially as herein
described.
4. In combination with the mechanism for moulding pullies referred to in the pre-
ceding claims, the rotatable-ring 7 with inclines 9 and, pins 5 sliding in the casing 2,

page_text: for raising the mould box 10 off the boss of the pattern after moulding, substantially
as herein described.
5. The construction of machine for moulding pullies combined and operating sub-
stantially as herein described with reference to the accompanying drawings.
Dated this 29th day of August 1889.
ABEL & IMRAY,
Agents for the Applicant.