Improvements in Centrifugal Machines.
Year: 1895

page_text: Date of Application, 10th Apr., 1895
Complete Specification Left, 29th May, 1895-Accepted, 29th June, 1895
Improvements in Centrifugal Machines.
We JOHN LAIDLAW, of the Firm of Watson Laidlaw & Co. 98 Dundas Street,
South, in the County of the City of Glasgow, North Britain, and JAMES WRIGHT
MACFARLANE, also of 98 Dundas Street, South, in the County of the City of
Glasgow, North Britain, Engineers, do hereby declare the nature of this invention
to be as follows :—
This invention relates to an improvement in centrifugal machines which are
driven at a high speed, and is more particularly applicable to that class of
centrifugal machine which is used for separating cream from milk. In such
machines if from any cause they get slightly off the balance, the drum has a
tendency to oscillate which causes the drum to rise up out of its place and smash
the machine.
The object of this invention is to provide a safety appliance which prevents the
drum rising out of position. The arrangement is applied to the spindle of the
drum near its lower end. One way of carrying out this invention is to cut a recess
in the spindle, and to provide one or more stops detachably attached to a fixed
support so that their ends may project into the recess. The stop or stops do not
touch the spindle in ordinary circumstances, but prevent the drum rising up.
The stops can be detached to allow of the drum being lifted out if desired.
Instead of the recess in the spindle a nut may be screwed on to the spindle and a
bracket provided over the nut to prevent the drum and spindle rising up.
it is desired to lift out the drum the nut is unscrewed from the spindle.
Dated this 9th day of April 1895.
When
BOTTOMLEY & LIDDLE,
154 St. Vincent Street, Glasgow, Applicants' Agents.
Improvements in Centrifugal Machines.
We, JOHN LAIDLAW, of the Firm of Watson Laidlaw & Co. 98 Dundas
Street, South, in the County of the City of Glasgow, North Britain, Engineers,
and JAMES WRIGHT MACFARLANE, Manager of the said Company, 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:
In such
This invention relates to an improvement in centrifugal machines which are
driven at a high speed, and is more particularly applicable to that class of
centrifugal machine which is used for separating cream from milk.
machines if from any cause they get slightly off the balance the drum has a
tendency to oscillate, which causes the druin to rise up out of its place and damage
the machine.
The object of this invention is to provide a safety appliance which prevents the
drum rising out of position. The arrangement is applied to the spindle of the

page_text: drum near its lower end. One way of carrying out this invention is to cut a
recess in the spindle, and to provide one or more stops detachably attached to a
fixed support so that their ends may project into the recess. The stop or stops
do not touch the spindle in ordinary circumstances, but prevent the drum rising
up. The stops can be detached to allow of the drum being lifted out if desired.
Instead of the recess in the spindle a nut may be screwed on to the spindle and a
bracket provided over the nut to prevent the drum and spindle rising up.
When
it is desired to lift out the drum the nut is unscrewed from the spindle.
In the accompanying drawing several methods of carrying this invention into
practice are illustrated.
In Figures 1, 2, 3, 4, and 6 a recess a is cut in the spindle, and one or more
stops bare attached to the framework c so that their ends may project into the
recess. These stops are removable so that the drum and spindle may be lifted
out when desired. In Figure 1 the stop consists of a pin which is screwed into a
hole in the framework, so that its end may project into the recess in the spindle.
In Figures 2, 3, and 6 the stop consists of a ring in halves fitting into the recess.
In Figures 2 and 6 the ring is kept in position by a nut d screwed on to the fixed
framework. In Figure 3 the two half rings are bent as shown, and they fit into
a recess formed in the framework. The part which fits into the recess is wedge-
shaped so that when the two halves are pinned together, the ring cannot lift up.
In Figure 4 the stop consists of a straight pin which fits partly into the recess in
the spindle, and partly into a recess formed in the framework. Instead of forming
a recess in the spindle we may screw a nut on to the spindle and attach a bracket
to the framework which prevents the nut and spindle from rising. This is
illustrated in Figure 5.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is:-
A safety attachment to the spindle of a centrifugal machine for preventing the
drum to which the spindle is attached from rising out of its proper working
position.
Dated this 28th day of May 1895
BOTTOMLEY & LIDDLE,
154 St. Vincent Street, Glasgow, Applicants' Agents.