Improvements in Centrifugal Machines.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Centrifugal Machines.
We, JOHN LAIDLAW, of the Firm of Watson, Laidlaw & Coy., of 98, Dundas
Street, South, in the County of the City of Glasgow, North Britain, Engineers,
and JAMES WRIGHT MACFARLANE, Manager of the said Firm, do hereby declare
the nature of this invention to be as follows:-
This invention relates to improvements in the steps or bearings of the spindles
of Weston centrifugals, such as are described in Application No. 17544 of 1899,
and consists in placing a spring or other suitable elastic medium between the
revolving anti-friction washers and the stationary nut or collar on the end of the
internal spindle, so that in the event of any part of the washer surfaces or the sur-
face of the flange of the nut or collar supporting the washers not being a true
plane, or if the surface be a plane in anyway inclined to the plane, at right angles
to the axis of the vertical spindle, the elastic medium will yield a little to the
pressure caused by the unequal washers or inclined surfaces as they revolve upon
one another and thereby tend to prevent abrasion of the surfaces in contact. The
springs or other elastic mediums, may be placed upon the spindle either above or
below the washers or between any or each of them. It is well known that. at the
high speed at which these washers revolve an extremely slight deviation in the
rubbing surfaces from a true plane, coming in contact with a similar deviation or
protuberance on the surface with which it is in contact causes intense pressure
owing to the suddenness with which the weight of the basket has to be raised in
order to allow the protuberance or inclined surfaces to pass one another.
Our invention has for its object the prevention of the subsequent seizing or
firing which this intense pressure frequently causes.
Spherical shaped washers have been used for the same purpose but the sliding
friction of the spherical surface is too great to allow the washer to adjust. itself
with sufficient rapidity to be effective.
471
1
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1000
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow,
Applicants' Patent Agents.
Improvements in Centrifugal Machines.
We, JOHN LAIDLAW, of the Firm of Watson, Laidlaw & Coy., of 98, Dundas
Street, South, in the County of the City of Glasgow, North Britain, Engineers,
and JAMES WRIGHT MACFARLANE, Manager of the said Firm, do hereby declare
[Price 8d1

page_text: 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 steps or bearings of the spindles
of Weston centrifugals, such as are described in our prior Patent No. 17544 A.D.
1899, and consists in placing a spring or other suitable elastic medium between the
revolving anti-friction washers and the stationary nut or collar on the end of the
internal spindle, so that in the event of any part of the washer surfaces or the sur-
face of the flange of the nut or collar supporting the washers not being a true
plane, or if the surface be a plane in anyway inclined to the plane, at right angles
to the axis of the vertical spindle, the elastic medium will yield a little to the
pressure caused by the unequal washers or inclined surfaces as they revolve upon
one another and thereby tend to prevent abrasion of the surfaces in contact. The
springs or other elastic mediums, may be placed upon the spindle either above or
below the washers or between any or each of them. It is well known that at the
high speed at which these washers revolve an extremely slight' deviation in' the
rubbing surfaces from a true plane, coming in contact with a 'similar deviation or
protuberance on the surface with which it is in contact causes intense pressure
owing to the suddenness with which the weight of the basket has to be raised in
order to allow the protuberance or inclined surfaces to pass one another..
Our invention has for its object the prevention of the subsequent seizing or
firing which this intense pressure frequently causes.
Spherical shaned washers have been used for the same purpose but the sliding
friction of the spherical surface is too great to allow the washer to adjust itself
with sufficient rapidity to be effective.
In order that our invention may be properly understood and readily carried
into effect we have hereunto appended one sheet of drawings.
The drawing is a section of the steps or bearings of the spindle..
A is the outer revolving spindle, B is the inner spindle, E is the bottom bush
of the revolving spindle A, b is a pin connecting the bush and spindle, C1, C2 &c.
are the washers, X. X' are the springs, which in this case are dish-shaped springs.
but other forms of springy material may be employed. The springs are placed
between the bottom bush E of the revolving spindle and the washer C¹, and also
between the bottom nut F and the washer C.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
claim is
In Weston centrifugal spindles the placing of a spring or other elastic medium
above, between, or under the anti-friction washers, substantially in the manner
and for the purpose described.
Dated this th
T1 1000
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow,
Applicants' Patent Agents.