Year: 1887

page_text: Date of Application, 29th Mar., 1887
Complete Left, 29th Dec., 1887
Complete Accepted, 3rd Feb., 1888
We ROBERT LUKE HOWARD, ELIOT HOWARD and ROBERT SAMUEL LLOYD all
of the firm of Hayward Tyler and Company of 84 Upper Whitecross Street in the
City of London, Engineers, do hereby declare the nature of this invention to be as
follows:
In hot air engines of the character of the Rider hot air engine patented
30th September 1875 No. 3404 or such hot air engines in which the lower part
of the heater is exposed to the direct heat of the fire such lower part wears out
much quicker than the other part thus necessitating the insertion of an entire new
heater; moreover in order to make the heater more fire resisting it is usually made
of a special and expensive mixture of cast iron. Now according to our invention
and in order to cheapen the manufacture and facilitate the renewal we in one modifi-
cation make the lower part of the heater separate from the rest of the heater which
may be of ordinary or cheaper cast iron and unite it thereto by means of bolts and
nuts or any other suitable means for easy detachment and renewal when this lower
part has been too much burnt away by the fire. In order to enable us to con-
veniently detach and attach the lower part of the heater we provide the enclosing
fire box or mantle with one or more lids or doors which are lined with fire brick.
In another modification we make the door on the fire box large enough to remove
the entire heater or only the lower removable part of same if so made. If such
door is placed in the front the smoke outlet at the back may be so constructed as
to act as a hand hole for reaching the parts to be detached. A further mode of
lessening the cost of repairs consists in providing an annular baffler or shield under-
neath the annular bottom part of the heater which is most exposed to the direct
heat. This shield may be supported from the fire box or from the heater and be
used with or without the other improvements hereinbefore referred to.
This construction of heater and shield may be used in connection with the improved
form or construction of fire box or mantle described in the specification of Okes's
rn |

page_text: patent dated 6th August 1886 No. 10034 the fire box being according to that
invention made in two or more parts joined by vertical flange joints and suspended
from the underside of the hot air cylinder. We may however according to our
invention make the fire box of an upper and a lower part which are detachably
connected by bolts and nuts or other suitable means in a horizontal joint whereby
we gain access to the heater or the lower detachable part of same.. By our invention
the cost of repairs is lessened and when needed they are much more promptly and
easily executed than heretofore was the case.
ROBERT LUKE HOWARD.
ELIOT HOWARD.
ROBERT SAMUEL LLOYD.
By Jensen & Son,
77, Chancery Lane, London, W.C.,
Patent Agents.

page_text: We, ROBERT LUKE HOWARD, ELIOT HOWARD and ROBERT SAMUEL LLOYD all
of the firm of Hayward Tyler and Company of 84 Upper Whitecross Street in the
City of London Engineers 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 :-
In hot air engines of the character of the "Rider " hot air engine patented
30th September 1875 No. 3404 or such hot air engines in which the lower part of
the heater is exposed to the direct heat of the fire such lower part wears out inuch
quicker than the other part thus necessitating the insertion of an entire, new heater ;
moreover in order to make the heater more fire-resisting it is usually made of a
special and expensive mixture of cast iron. Now according to our invention and in
order to cheapen the manufacture and facilitate the renewal we in one modification
make the lower part of the heater separate from the rest of the heater which may be
of ordinary or cheaper cast iron and unite it thereto by means of bolts and nuts
or any other suitable means for easy attachment and renewal when this lower part
has been too much burnt away by the fire.
Figure 1 of the accompanying drawings is a vertical section through the heater
and fire box of a Rider hot air engine thus constructed. The heater is made of an
upper part A and a lower part B the two being united by bolts and nuts. In order
to enable us to conveniently detach and attach the lower part B of the heater we
provide the enclosing firebox or mantle C with one or more lids or doors which are
lined with fire brick. We have in this case shewn two such hand hole doors D and F
fastened as shewn or it may be by means of one central bolt with cross bar like a mud
hole door for a steam hoiler. G is the outlet to the chimney.
In another modification shewn in the vertical sectional view Figure 2 we make the
door on the fire-box large enough to remove the entire heater or only the lower
removable part of same if so made. If such door is placed in the front as here shewn
at F the smoke outlet G at the back may be so constructed as to act as a hand-hole
for reaching the parts to be detached. For this purpose we may provide it with a
hand hole door H attached by hinge and fixed by one or more thumb nuts. If the
whole heater is to be withdrawn the fire door and opening at F must be made deeper.
A further mode of lessening the cost of repairs consists in providing an annular baffler
or shield I underneath the annular bottom part of the heater which is most exposed
to the direct heat. This shield may however also be of any other suitable form for
deflecting. It may be supported from the fire box or from the heater and be used
with or without the other improvements herein before referred to.
This construction of heater and shield may be used in connection with the improved
form or construction of fire box or mantle described in the Specification of Okes's
Patent dated 6th August 1886 No. 10034, the firebox being according to that
invention made in two or more parts joined by vertical flange joints and suspended

page_text: from the underside of the hot air cylinder. We may however according to our
invention make the firebox of an upper and a lower part which are detachably
connected by bolts and nuts or other suitable means in a horizontal joint as above
described and shewn with reference to the heater whereby we gain access to the heater
or the lower detachable part of same.
By our invention the cost of repairs is lessened and when needed they are much
more promptly and easily executed than heretofore was the case.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is: —
First Constructing the heater in hot air engines of the character described of
an upper and a lower part detachably connected together and providing means for
conveniently detaching and attaching such lower part substantially as and for the
purpose set forth.
Second-The manufacture and use of a shield under the heater of such engines
substantially as set forth.