Improvements in Centrifugal Machines..
Year: 1894

page_text: Date of Application, 8th Mar., 1894-Accepted, 7th July, 1894
COMPLETE SPECIFICATION:
Improvements in Centrifugal Machines..
I, AUBIN OLLIER, Mechanical Engineer, of 20 Rue Saint Remi Bordeaux,
Gironde, in the Republic of France, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to improvements in the construction of centrifugal machines
of the Adant type, such as described in Specification No. 13084/88 used in the
manufacture of refined sugar in tablets or cakes for the purpose of avoiding the
frequent occurrence of accidents owing to the rupture either of the cast-iron plates
which form the upper joint-coverings, enclosing and securing the moulds to the
drum of the centrifugal, or to the rupture of the bolts or nuts fitted with wings or
ears which hold the said joint coverings in position.
These joint-covers and bolts and nuts partake of the rapid rotary motion of the
basket of the centrifugal, and in case of rupture they are hurled violently against
the fixed outer case which is pierced and shattered thereby, the broken fragments
being scattered with great violence so that not only are the workmen exposed to
the risk of being seriously; even fatally wounded, but also all apparatus in the
immediate vicinity of the centrifugal are liable to more or less injury..
To prevent such accidents, frequently fatal, I have invented a device to be
secured to the centrifugal basket, namely a ring placed at a height sufficient to
prevent the hurling of broken fragments against the case of the centrifugal. In
the event of the fracture of any of the parts within the said circle (which I call
the "safety ring") the fragment or fragments is or are intercepted by the ring the
broken piece or pieces being retained. and continuing to rotate with the machine,
but without giving rise to accident, or injury to persons or things. As such an
occurrence must involve the production of a rumbling sound, emanating from the
machine, the attendant in charge is warned by the abnormal noise, and will, at
once stop the machine to effect the necessary repairs by substituting a spare, piece
for the broken one, all parts being made interchangeable.
The accompanying drawings illustrate the application of my invention ï.e., of a
safety-ring to a centrifugal machine of the Adant type.
Like letters indicate like parts.
Figure 1 is a vertical section of the upper part of such a centrifugal, the basket
being provided with the safety ring of my invention.
Figure 2 is a horizontal section of the centrifugal, on the line y of Figure 1.
Figures 3, 4 and 5 show on an enlarged scale, the details of construction of the
safety-ring secured to the basket A of the centrifugal.
Figure 3 is a section on the broken dotted and crooked lines 1-2-3-4, 5678
of Figure 2.
Figure 4 is an elevation of a single sector of the safety-ring, showing one of the
joint-covers e securing the sectors of the ring a properly so-called, and
Figure 5 is a vertical section of the safety-ring a and of its joint-cover e on the
crooked line st of Figure 4.
The safety-ring formed of a flat metallic circle or ring c arranged around the
upper part or flange A of the basket of the centrifugal. Fixed to the flat upper
surface of cas by rivets d is one of the webs of an angle-iron 6 whereof the other
web is attached by rivets d¹ to the broad band or ring a placed thus on edge
against and inside & on the flat ring c. Bolts and nuts g-arranged at suitable and
regular intervals and passing through the horizontal web of 6 the flat ring c and
the upper flange A of the basket, secure the latter to the collar a. The latter is

page_text: made in say two parts secured together by the joint-covers e by means of rivets or
equivalent f. The collar a and "angle-iron b may be constructed in one, two or
more pieces similarly joined together by joint-covers or fish-plates.
The collar is surfaced prior to being mounted in the centrifugal and its internal
diameter preferably is made from one to two millimetres smaller than that (P) of
the basket for the purpose of guiding the moulds M when they are slipped into the
centrifugal and to prevent their catching upon the top of the filtering sheets or
web of the basket.
The rivets d d and have countersunk heads d' f' on the inner surfaces which
require to be smooth or flush.
The safety-ring is placed below the cover C and within the outer cylindrical
casing T of the centrifugal machine; it in no way interferes with the working
thereof. The fine liquor or clarified syrup is fed into the moulds by the
conduits D:
The safety-ring here shown as formed in three parts abc rivetted together may
be constructed in one two or more sections of cast metal of a tough strong nature
and of the form of a high flanged collar as shown in Figure 6.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. In a centrifugal machine of the Adant type the arrangement of a safety-ring
or high collar firmly secured to the upper part of the basket and participating in
its rotary movement for the purpose of preventing the scattering with violence? of
any broken pieces against the fixed outer casing of the centrifugal substantially as
described and illustrated in the accompanying drawings.
2. In a centrifugal machine of the Adant. type a safety ring comprising two
metallic circles such as a and c securely joined together by an angle-iron ring band
joint covers e the whole firmly fixed on the upper part of the basket A or formed
of a high flanged collar made in one or more sections secured to the upper part of
the basket A substantially as described and illustrated in the accompanying
drawings.
3. The combination with the basket of a centrifugal machine of the Adant type
of a collar or band secured to its upper edge substantially as and for the purpose
described.
Dated this.8th day of March 1894.
W. P. THOMPSON & BOULT,
Agents for the Applicant.