Improvements relating to Dust Extractors for Carding Engines.
Year: 1898

page_text: Date of Application, 27th Sept., 1898-Accepted, 26th Nov., 1898
COMPLETE SPECIFICATION.
Improvements relating to Dust Extractors for Carding Engines.
i
I, LEON DE LANDISHEER, of Quai du Ramage, 2, Ghent, in the Kingdom of
Belgium, Directeur de Filature, 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 the ventilation of encased or boxed-in carding engines,
known as full circular cards used in the preparation of flax, hemp, jute, and other
fibrous substances, the cards so designated having the feeding and doffing rollers
on the same side of the cylinder.
The main objects. of the invention are to effect an economy of space in the mill,
and to provide increased facilities for access to the workers and strippers, for the
purpose of inspecting and cleaning the same.
In the accompanying drawings, my improvements will be seen diagrammatically
illustrated as applied to a full circular carding engine surrounded by a ventilating
case.
1
Fig. 1 is a side elevation in section, shewing the mode of connecting the case
with the ventilating apparatus, and
Fig. 2 is a diagram pian of the ventilating apparatus.
In general, two or more carding engines will be set side by side, and a flue
common, to all will, carry off to the dust room the dust drawn from the several
casings.
I will, however, in the first instance, explain my invention as applied to a single
carding engine, and afterwards refer to the modification adopted when ventilating
a group of carding engines placed side by side on the same floor.
The carding engine is enclosed in a box or casing A, to which air is admitted
only through the feed opening and the delivery opening, and the construction of
this casing differs but little from those hitherto employed in connection with a fan
for the removal of dust created in the working of the engine.
Below the ground line of the casing A, and immediately under the carding
engine, is constructed a shallow pit B, which is of the full width of the engine at
back, and tapers towards the front to about one half that width.
Situate in this pit is a skeleton frame C, which serves to support a horizontal
plate C¹ of iron or other suitable material, which partially covers the pit, and is
intended to receive any deposit from the fibres under treatment too heavy to be
carried off by the draught of the ventilating apparatus.
Standing above this pit B, is the casing of the carding engine which closes the
rear end of the pit, its forward end being closed by the casting which forms the
case D of the ventilating fan.
The casing A communicates through an uncovered portion of the frame C with
the pit at its broader end, and, at its narrower end, the pit communicates through
the skeleton frame C with the fan case D.
Rotary motion is transmitted to the fan shaft through a driving belt working
over a pulley on the axle of one of the card rollers.

page_text: When the fan is set in action, a draught is created in the casing A, the air
passing freely through the feed and delivery opening, and thence around the
engine to the pit B.
Here the heavier particles in the air are intercepted, and become deposited on
the plate C¹; the finer particles, however, enter the pit, and passing along it, rise
into the fan case, from which they are discharged by the centrifugal action of the
fan down a channel D¹, into a horizontal channel D2, leading off to the dust room
external of the mill.
The casing A, besides having removable portions, as usual, to give access to the
interior, is fitted with a door E hinged near to the floor of the mill, and so arranged
that, when freed from its fastening, it will drop inwards, and close the opening
leading from the casing A to the pit B.
Provision is thus made for raking off the deposit on the plate C¹, the door E
forming a bridge for the deposit to pass over away from the engine. The removal
of the plate gives ready access to the lower working and stripping rollers, and
allows of the pit being cleared of any accumulation of dust.
A further advantage in this hinged door is, that it serves to cut off all connection
between the casing A and the pit B, in case of fire inside the engine, the draught
being immediately stopped, and the fire prevented from entering the ventilating
apparatus.
A modification of the ventilating apparatus is indicated in the diagram plan
view, Fig. 3, where a series of engines are designed to ventilate into a common
exhaust flue, the flue being proportionately enlarged to establish a proper com-
munication with the boxed-in engines.
In this arrangement, instead of fitting each engine with an exhaust fan, as
described with reference to Figs. 1 and 2, a fan of increased capacity will be applied
to the flue D2, to create a draught through the casings of the several carding engines
connected with the flue.
The pit of each engine is connected directly with the flue D2 by means of an elbow
pipe d, pointing to the fan, or in the direction of the draught.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The application to encased or boxed-in carding engines, of the full circular card
type, of the apparatus above described, whereby an efficient ventilation of the
engines is secured, with an economy of floor space; the facile removal of the
accumulated dust and increased facility of access to each engine for cleaning, are
provided for; and a sudden stoppage of the draught, when required, is obtained.
Dated this 27th day of September 1898.
NEWTON & SON,
Agents for the Applicant.