434 
with the piston, is drawn up out of the 
way so that the ice can-be broken up 
out of the vessel, and applied to the 
confectioner’s or other uses, or to be 
stored in an ice-house. 
The patentee directs thick small plates 
of glass to be cemented air-tight into 
the lid of the vessel, and into the piston- 
plate, in corresponding situations, in 
order that the operator may see when 
the water has become frozen. This, 
however, and some other parts of the 
apparatus in detail, appear to us not so 
far perfected as to be beyond the reach 
of material improvement. We hope 
that these will be timely made by the 
patentee himself, and not by infringers. 
To Witt1am and Joun CricutTon, of 
Manchester, Lancashire, for an Im- 
provement in the Cylinders used in 
Carding Engines, and other Machines 
for preparing Cotton or Wool, or any 
other fibrous Substances for being Spun. 
—18th March, 1823. 
Tue principle of this invention con- 
sists in the inlaying of bars of wood in 
the surfaces of smoothly-turned hard 
composition cylinders, in order to be 
enabled to affix the card-leathers on to 
such cylinders by nails or tacks, driven 
through their edges into the wood, at 
the same time that the backs of the 
cards themselves rest on the composi- 
tion, instead of having recourse to 
screws, or to screw-pins and nuts, pass- 
ing through the entire coat of the com« 
position cylinders, heretofore in use, for 
fixing on their cards. 
An axis, carrying those cast-iron 
wheels, the outer ones at the distance 
of the length of the intended cylinder 
and the other. intermediate, forms the 
carcase or framing of the cylinder; and 
its surface is formed of sheet-iron affixed 
round the same, in the manner usual 
for receiving an entire coating of com- 
position: but the patentee provides a 
number of long and very shallow trays 
of cast-iron, adapted to the width of 
the cards to the length of the cylinder, 
and to its curvature, and these he affixes 
firmly on to the sheet-iron cylinder by 
copper rivets, not touching each other, 
but leaving between them spaces of 
about an inch wide, into which spaces 
bars of wood, of somewhat’ greater 
thickness than the height of the trays, 
and closely fitted in between them, and 
are secured by screws to the sheet-iron 
cylinder; the outside ofthe cylinder is then 
carefully painted with white-lead and oil, 
and when become dry the laying on of 
Patents for Mechanical and Chemical Inventions. 
[Dee. I, 
the composition is commenced, with a 
hard brush, laying it evenly over all the 
bottoms and edges of the trays: this 
being done in a warm room, this first 
coat of composition will soon become 
dry ; and then another coat is laid on 
and dried, and so on, until the trays 
are quite filled up with ,composition, 
and their edges also thickly covered 
thereby, nearly or quite equalling the 
bars. of wood in height. 
The whole surface having become 
dry and hard, the cylinder is removed, 
and laid by its necks in lathe-bearings, 
and is rotated by a handle during the 
turning down of its surface, by proper 
tools, to the exact intended diameter, 
and with a perfectly smooth surface, 
partly composed of longitudinal bars of 
wood, but principally of a composition 
not liable to expand, shrink, or soften 
by changes of the weather, which were 
the evils formerly experienced, when 
wooden and other. coverings for card 
cylinders were used or tried. 
The. composition which is used, but 
not claimed by the patentees, is pre- 
pared by boiling a mixture of common 
glue and whitening with white-lead 
paint and linseed oil, to the consistency 
of a thick paint. 
Upon these improved cylinders the 
leathers’ of the sheets of cards are 
fastened by nails or tacks, as was _prac- 
tised with wooden cylinders. When, by 
the repeated changing of the cards as 
they wear out, any of the bars of wood 
become too full of rail holes to answer 
their purpose, they may be: unscrewed 
and removed, and if great eare is used, 
without chipping up the composition; 
and then other similar bars may be in- 
serted in their places, and planed down 
even with the composition: in long 
cylinders the bars of wood are usually 
made in two lengths for the conve- 
nience of these occasional replacings. 
To Jarvis Boot, of Nottingham, in that 
County, for his Apparatus and Method 
for Singeing of Lace, to rémove' the 
loose Fibres of the Threads.—13th 
December, 1823. ; 
Tuts is the third patent extant for 
accomplishing the object last mentioned, 
viz., Mr. Hall’s, in 1817, by means of 
the flame of a’ gas-light, and Mr. Don- 
kin’s, in September 1823, by! means of 
atmospheric air heated to ignition; so 
great 1s the quantity of lace now made 
on machines, and requiring singeing 
amongst its finishing operations. 
The present invention consists in ap- 
plying 
