1808] 
NEW PATENTS 
fis 
LATELY ENROLLED. 
en 
MR. ALLAN POLLOCK’S (PAISLEY), for a 
Stove on a new Construction, and va- 
rious Improvements applicable to Stoves, 
Grates, and Fire-places. 
ROM the figures and description of 
the specification before us, we learn 
that in the lower compartment of the 
stove is placed the fire-place, or grate, 
set in or surrounded with brick, stone, 
&c. and behind, or on any, or ‘all. the 
sides, except that in which the doors are 
made, is fixed a second back, or exterior 
part of iron, which with a piece, in which 
a set of edue bars or shelves are cast or 
fixed, affor ds a winding passage ; through 
this the air being admitted at the lower 
part from without, by means of an aper- 
ture or apertures ‘left for that purpose, 
becomes heated by contact with the 
stove to a suitable temperature, but can- 
not be decomposed or subjected to any 
chemical change, because the interposed 
mass of brick, or stone, &c. prevents the 
iron or metallic parts from being too 
strongly heated; and the said heated air 
ascends from the winding passage into 
the pipe, and thence into ‘the apartment 
through suitable openings into the tase 
or ot cher ornamental piece attop. The 
space between the grate and the upper 
part of the fire- place i is partly closed, in 
such a way that the smoke and impure 
air from the fire is made to ascend by a 
circuitous or spiral course, through the 
several openings where its heat is com- 
municated to the pipe and to the body 
of the stove previous to its escape, which 
is permitted through the chimney. To 
prevent any decomposition or chemical 
change from being effected at the inner 
surface of the pipe, or atany other of the 
surfaces at which air is intended to be 
heated, and introduced into apartments, 
it is expedient, and of importance, that 
the said surfaces should possess a hard 
and glassy coating, tor which purpose Mr. 
P. adds such a proportion of lime, &c. to 
the sand or loam to be made use of in 
forming the moulds, in or upon which the 
metal is to be cast, as shall render the 
sand or loam partially fusible, that the 
action of the heat from the fluid and ig- 
nited metal convert a certain portion of 
the said sand or loam into’a glassy coat- 
ing, adhering to, and defending the face 
thereof, from such decomposition or che~ 
nical change. 
By the drawings, this stove appears an 
“Ta to an apartment : it ha howe- 
“p 
4 
’ 
ver, as in other similar cases, capable of 
great variations in its figure, and may be 
made of artificial stone, pottery, &c. in 
stead of metal; in these, and in all other 
constructions, in order that the fire should 
be seen without opening the doors or 
apertures of communication between the 
apartment and the fire-place, he glazes 
them with Muscovy talc. 
Scarcely any article of domestic eco- 
nomy has called forth the talents of inge- 
nious men more than the article stoves or 
fire-places: the invention now described 
cannot he. fully set. forth for want 
of the accompanying figures, The ad- 
vantages of Mr. Pollock’s stoves are ‘said 
to be as follow :— 
They produce a complete circulation 
of air in every part of the room, without 
those currents of cold air which always 
exist in rooms. warmed in the usual mane 
ner; a constant current of warm air en- 
tering the room from the external atmo- 
sphere, which is heated in its passage 
through the stove, while the cold air 1s 
continually passing off the aperture in_ 
the ash-pit door. ‘The coating the parts 
of the stove through which the air passes 
to be heated, preserves its purity. They 
produce an equal temperature throughout 
the room. Part of the front of the stove 
being transparent renders the fire visible, 
allowing both light and heat to pass into 
the room, and preserving the cheerful ap- 
pearance of an open fire. The lining of 
the stoves with stone or brick renders them 
perfectly secure from all danger of fire. 
They completely cure smoky chimneys; 
prevent the inconveniences of dust, save 
a great proportion of the fuel, and burn 
the fine or small coal nearly as well as the 
large. 
¥ 
— EE 
MR. HOULDITCH’s (LONG ACRE,) for Ime 
provements of Four-wheeled Carriages 
of different Descriptions, 
The nature of this invention, is, that, 
with regard to crane-necked carriages 
instead of connecting the crane to or 
with the set of wheels in the usual man- 
ner, springs are interposed between the 
axles, &c. to which the whéels are usually 
att ached, and the cranes. This is done 
by means of bolts or screws, or keyed- 
pieces, so that the body remains firmly 
connected, and in its place as long as is 
required, though it is easily taken off and 
another "pody substituted, as occasion - 
may demand. Two cranes are used in 
preference 
