IMPROVEMENTS IN APPARATUS FOR DRYING OR STOVING YARNS
Year: 1879

page_text: LETTERS PATENT to David Picken Smith, of Thornliebank, in the County
of Renfrew, North Britain, Engineer, for the Invention of "IMPROVEMENTS
IN APPARATUS FOR DRYING OR STOVING YARNS."
PROVISIONAL SPECIFICATION left by the said David Picken Smith at the
Office of the Commissioners of Patents on the 4th December 1879.
DAVID PICKEN SMITH, of Thornliebank, in the County of Renfrew, North
Britain, Engineer. "IMPROVEMENTS IN APPARATUS FOR DRYING OR STOVING
YARNS."
This Invention has for its object the combination of improved apparatus to be
employed in connection with the drying or stoving of yarns, and in carrying it out
stoves or drying chambers are constructed of brickwork, or of metal, or of a com-
bination thereof, or of other suitable materials, and carriages are provided upon
which to enter and hold the yarns in the stoves, the stoves and carriages being
made of sizes adapted to each other. A. convenient size of carriage is about
sixteen feet long by about four feet broad, and four to five feet high; but other
sizes may be adopted if preferred. The carriages consist of open frames mounted
on wheels, and rails are by preference laid down to guide them into and out of the
stoves. The top horizontal side pieces of each carriage are made with bearings for
the ends of transverse horizontal rods or poles on which the hanks of yarn are
hung, and these rods are by preference fitted with small toothed wheels at one end
to receive motion from a worm shaft or other gearing for the purpose of moving
the hanks slowly round whilst in the stove so as to prevent the parts resting on the
rods from being insufficiently acted on. The banks or rods carrying them are
placed on the carriage whilst this carriage is outside of the stove, and when filled
the carriage is run into the stove and the door closed.
For simple drying purposes a current of heated air is, by preference, passed
through the stove or drying chamber, the air entering at the top, and being drawn
off by one or more outlets at the bottom by means of a fan or other blower. The
air is heated by means of steam which passes through a number of horizontal pipes
crossing the upper part of the stove or drying chamber, the air inlet being above
the steam pipes, and the air passing downwards between them.
For stoving purposes, as required in preparing yarns for Turkey-red dyeing, the
stove may be heated in the same manner as the stoves in use for that purpose.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said David Picken Smith in the Great Seal Patent Office on the 2nd
June 1880.
DAVID PICKEN SMITH, of Thornliebank, in the County of Renfrew, North
Britain, Engineer. "IMPROVEMENTS IN APPARATUS FOR DRYING OR STOVING
YARNS."
My said Invention has for its object the combination of improved apparatus to be
employed in connection with the drying or stoving of yarns, and in carrying it out a
stove or drying chamber is constructed, and carriages are provided on which to
enter and hold the yarns in the chamber, the chamber and carriages being made of:
sizes adapted to each other. The carriages consist of open frames mounted on
wheels, and rails are by preference laid down to guide them into and out of the
chamber. Provision is made in connection with the carriages for turning the rods
or poles on which the yarn banks are hung slowly round whilst in the chamber so
as to prevent the parts resting on the rods from being insufficiently acted on. The
hanks or rods carrying them are placed on the carriage whilst this carriage is
outside of the chamber, and when filled, the carriage is run into the chamber and
the door closed.
For simple drying purposes a current of heated air is, by preference, passed
through the chamber, the air entering at the top, and being drawn off by one or
more outlets at the bottom by means of a fan or other blower. The air is heated
by means of steam, which passes through a number of horizontal pipes crossing the
upper part of the chamber, the air inlet being above the steam pipes, and the air
passing downwards between them.
For stoving purposes as required in preparing yarns for Turkey-red dyeing the
stove may be heated in the same manner as the stoves heretofore in uso for that
purpose.
And in order that my said Invention, and the manner of performing the same
may be properly understood I hereunto append two Sheets of explanatory
Drawings to be hereinafter referred to, and representing yarn drying apparatus as
made with my improvements. In these Drawings the same reference numerals
are used to mark the same or like parts wherever they are repeated.
Figures 1 and 2 on the two accompanying Sheets of Drawings are vertical sections
as at right angles to each other of one modification of my improved apparatus.
The drying chamber forms the lower part of a rectangular structure, such lower
part being made with castiron frames and side plates 3, and having openings at
opposite ends, to which hinged doors 4, 5, are fitted. The upper part of the
structure is an open topped wooden casing 6, having within it a number of
horizontal pipes 7, through which steam is passed for the purpose of heating the
air which passes in a downward direction between the pipes 7. The steam pipes 7
are arranged in sections, each section being fixed in separate end chests 8, formed
with branches 9, 10, for the attachment of inlet and outlet steam pipes; this
arrangement in sections and with separate end chests being very convenient and
admitting of the quantity of steam pipes being easily increased or diminished to
the extent of one or more sections, or of steam being passed through more or fewer
of the sections accordingly, as it may be found desirable in different cases. The
air is drawn downwards through the structure by means of a fan 11 (or it might
be any other suitable blowing apparatus) being led thereto by two ducts 12.
The carriage for carrying the yarn, and which is shown as in position in the
drying chamber, consists of an open framing made up of longitudinal side frames 13,
connected by transverse bars 14, at the corners, and mounted on wheels 15, which
run on and are guided by rails 16. The carriage in the modification delineated is
made for two horizontal rows of rods 17, on which the yarn hanks are hung, and

page_text: the ends of these rods 17 rest in opentopped bearings formed for them in the side
frames 13. Each rod 17 has formed or fixed on it, near one end, a wormwheel 18,
and when the rods are in their places their several wormwheels 18 gear with one
or other of two screw shafts 19 carried upon the side frames 13, the ends of these
shafts 19 projecting a little beyond the ends of the carriage, and being formed
with coupling forks or crossheads. On one 4 of the doors there is fitted a bearing
for a short spindle, having a coupling crosshead or fork 20 on its inner end and a
winch handle 21 on its outer end, and when the door is closed the coupling 20
engages with one of the shafts 19, which can then be turned by turning the
handle 21. The other door 5 is fitted with gearing for transmitting the motion
from one shaft 19 to the other; this gearing consisting of an external vertical
shaft 22, geared by bevil wheels to two short spindles 23, 24, passing through the
door, and having coupling forks or crossheads on their inner ends to engage with
the ends of the shafts 19.
There may be two or more of the carriages for each drying chamber so that one
may be filled ready to be placed in the chamber as soon as another has been
drawn out.
Having thus particularly described my said Invention, and the manner of
performing the same, I have to state that I do not restrict myself to the precise
details herein described or delineated, but that what I believe to be novel and
original and claim as the Invention secured to me by and in terms of the herein-
before in part recited Letters Patent is,―
The combination of a carriage or carriages fitted with rods for carrying hanks of
yarn with a drying or stoving chamber, the rods having connections, by means of
which they can be turned whilst in the chamber, and the various parts being
arranged substantially as and for the purposes hereinbefore described.
In witness whereof, I, the said David Picken Smith, have hereunto set my
hand and seal, this Thirty-first day of May, in the year of our Lord One
thousand eight hundred and eighty.
Witness,
EDMUND HUNT,
Patent Agent,
Glasgow.
DAVID P. SMITH. (L.S.)