Improvements in Vacuum Boxes for Paper Making Machinery.
Year: 1891

page_text: Date of Application, 27th Oct., 1891
Complete Specification Left, 27th July, 1892-Accepted, 27th Aug., 1892
PROVISIONAL SPECIFICATION.
Improvements in Vacuum Boxes for Paper Making Machinery.
We, DAVID HORSBURGH of 12 Peabody Street, Bolton, Lancashire, Engineer
and THOMAS TEMPLETON MACKIE LUMSDEN of the firm of James Milne & Son,
Abbeyhill, Edinburgh, in the County of Midlothian, Engineer, do hereby declare
the nature of this invention to be as follows:―
This invention relates to vacuum boxes for the wire frames of paper making
machines and under the said invention each box is provided with a series of three
rollers arranged one below and two above the axes of the upper two being in the
same plane. The upper rollers carry the wire frame and they are so arranged as
to project slightly above the upper edge of the box to prevent friction of the frame
thereon.
The upper rollers bear upon and they are driven by frictional contact with
the under roller which is covered with india rubber or other elastic material and
upon whose axis a belt pulley or other means of providing rotation is fixed. The
axes or trunnions of the upper rollers rest upon inclined frames secured to the ends
of the box. The chambers through which the water passes off are under the
invention adjustable to suit various widths of wire frame and they are each carried
upon a screwed part of a tube passing inwards through the ends of the box and
having at the outside of the box hand wheels upon them by which they are capable
of being rotated, the two lengths of tube being coupled by a sleeve at the centre
of the box which sleeve together with the parts of the tubes within the coupling
are perforated to permit of the escape of water.
Dated this Twenty-sixth day of October 1891.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Vacuum Boxes for Paper Making Machinery.
We, DAVID HOBSBURGH of 12 Peabody Street, Bolton, Lancashire, Engineer,
and THOMAS TEMPLETON MACKIE LUMSDEN of the firm of James Milne & Son
Abbeyhill, Edinburgh, in the County of Midlothian, Engineer, 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 vacuum boxes for the wire frames of paper making
machines and under the said invention, which is illustrated by the several figures
on the accompanying sheet of drawings, Figure 1 being a longitudinal section,
Figure 2 an end elevation Figure 3 a plan, Figure 4 also a plan with part of the
apparatus removed and Figure 5 a cross section, each vacuum box A is provided
with a series of three rollers one roller B being arranged below and two rollers C
above the axes of the upper two being in the same plane. The upper rollers C
carry the wire frame and they are so disposed as to project slightly above the
upper edge of the box A to prevent friction of the frame thereon. The upper
rollers bear upon and they are driven by frictional contact with the under roller B,
which is covered with india rubber or other elastic material and upon whose
shaft D, a belt pulley or other means of providing rotation is fixed. The axes or
trunnions E of the upper rollers rest upon inclined frames F erected within the
ends of the box. Between the rollers C a pipe G extends from end to end of the
box its extremities being connected to a lower pipe H through which the water is

page_text: conducted away.
The pipe G is slit throughout a portion of its length as shewn
at and from the ends of the box a half pipe or cover I extends inwards over a
greater or lesser portion of the slit parts. These half pipes or covers have guide
blocks J at their inner ends which together with the half pipes themselves are
adjustable longitudinally to suit various widths of wire frames.
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 :-
1. In a vacuum box for paper making machinery the arrangement of three
rollers as herein before described two of them in the same plane carrying the wire
frame being driven by the third and being so disposed as to prevent friction of
the frame with the edge of the box.
2. For paper making a vacuum box constructed, substantially as described with
reference to the drawings annexed.
Dated this Twenty-sixth day of July 1892.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.