IMPROVEMENTS IN OBTAINING AND APPLYING MOTIVE POWER
Year: 1875

page_text: LETTERS PATENT to Richard Bevan, of Dunstable, in the County of
Bedford, for the Invention of "IMPROVEMENTS IN OBTAINING AND
APPLYING MOTIVE POWER."
Sealed the 14th March 1876, and dated the 18th September 1875.
PROVISIONAL SPECIFICATION left by the said Richard Bevan at the
Office of the Commissioners of Patents, with his Petition, on the
18th September 1875.
I, RICHARD BEVAN, of Dunstable, in the County of Bedford, do
" IMPROVEMENTS IN
hereby declare the nature of the said Invention for
OBTAINING AND APPLYING MOTIVE POWER," to be as follows:-
This Invention consists in the use and adoption of certain arrange-
ments in regard to the boiler, and also in respect to the mechanical
arrangements to operate in correspondence with such boiler, or with
any other suitable prime mover provided with the said arrangements.
The mechanical arrangements above described comprise a wheel or
disc, having on the side or circumference thereof pins or projections.

page_text: Above and below a frame encompasses this disc..or wheel,-which-is-kept-
in motion by the piston rod (or_a_connecting rod from it.) of_a_steam_
cylinder (though other suitable prime mover may be adopted). On this
frame are a number of projecting gripes-or-teeth, whose distance apart
should not be equal with that of the pins or projections on the wheel or
disc. These gripes or teeth should be hung so as to move when struck
with sufficient force, so that on contact the resistance of the wheel or
disc would move them backwards and forwards, but if blocked on either
side the wheel would be turned. This can be accomplished in a variety
of ways, as will be well understood by practical men.
The boiler is constructed in any suitable form, and is fitted internally
with cogged circular compartments. The flame from the furnace rises
between these cogged compartments, but whether they are to be circular,
radiating, or parallel is a matter of simple calculation. The entrance of
draught and chimney are small, and a trap opening upwards is fitted to
prevent return of the smoke. These cogged compartments are open at
the top so as to communicate with the steam chamber, on which there
would be at least three safety valves secured by weight. Or the boiler
may be fitted with parallel compartments not cogged. The smoke
instead of rising freely upwards is conveyed by a chimney to the
draught chimney beneath. Should the smoke not freely pass into the
furnace it may be forced by a force pump in the descending chimney.
-SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Richard Bevan in the Great Seal Patent Office on
the 18th March 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
BEVAN, of Dunstable, in the County of Bedford, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighteenth day of September, in the
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
_cessors, give-and- grant unto me, the said Richard Bevan, Her-special
licence that I, the said Richard Bevan, my executors, administrators,
and assigns, or such others as I, the said Richard Bevan,, my
1

page_text: 66
executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
* IMPROVEMENTS IN OBTAINING AND APPLYING MOTIVE POWER," upon the con-
dition (amongst others) that I, the said Richard Bevan, my executors
or administrators, by an instrument in writing under my, or their, or
one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was
to be performed, and cause the same to be filed in the Great Scal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE; that I, the said Richard Bevan, do hereby declare
the nature of my said 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 consists in the use and adoption of certain arrange-
ments in regard to the boiler, and also in respect of mechanical arrange-
ments to operate in correspondence with such boiler or with any other
suitable prime mover provided with the said arrangements for the
purposes of obtaining and applying motive power.
The mechanical arrangements above mentioned comprise a wheel or
disc, having on the side or circumference thereof pins or projections.
Above and below a frame encompasses this disc or wheel, which is kept
in motion by the piston rod of a steam cylinder, or by a connecting rod
from said piston rod, though other suitable prime mover than steam
may be adopted. On this frame are a number of projecting grips or
teeth, whose distance apart should not be equal with that of the pins or
projections on the wheel or disc. These grips or teeth should be hung
so as to move when struck with sufficient force, so that on contact the
resistance of the wheel or disc would move them backwards and
forwards, but if blocked on either side the wheel would be turned. This
can be accomplished in a variety of ways, as will be well understood by
practical men.
The boiler is constructed in any suitable form, and is fitted internally

page_text: from the furnace rises between these corrugated cogged-or-toothed-com--
partments, but whether they-are-to-be-circular, radiating;-or-parallel-is-a-
matter of simple calculation. The entrance of draught and chimney
should be small, and a trap opening upwards is fitted toprevent the return™
of the smoke. These corrugated, cogged, or toothed compartments are
open at the top so as to communicate with the steam chamber, in which
there should be at least three safety valves secured by means of weight.
Or the boiler may be fitted with parallel compartments not cogged. The
smoke instead of rising freely upwards is conveyed by a chimney to the
draught chimney beneath. Should the smoke not freely pass into 1
the furnace it may be forced by a force pump in the descending
himne
circular motion to prime mover; Figure 2, cross section.
Figure 3 is view of one form of boiler.
Figure 4 is view of another form of boiler; Figure 5, part view of
modification of boiler shown in Fig. 4.
In the said Figures 1 and 2 a direct circular movement is imparted
(dispensing thereby with the eccentric at present in use) by a wheel a
attached to shaft a³, which carries the driving wheel of the engine or
prime mover, said wheel a having a number of projecting limbs 6 on its
-side..or_sides.;_or instead thereof shelves or teeth projecting from its
circumference. In a casc c would be a number of suspended teeth or
grips d to impart motion to the wheel, the case being impelled by a
rod e connected with the steam cylinder. It is evident that as the
resistance of the wheel a can be made to exceed that of the suspended
teeth or grips & these would be swayed backwards and forwards if left
wholly or partially round by the forward and backward motion of the
case c, but if impediments be placed on their sides, either above and
below on the same side (or on opposite sides, if both above or both
below) the wheel must be turned round. These impediments are, as I
intend to be, formed of projections g from two cross pieces h, said cross
pieces removing them above or below the pivots or points of suspension i,
and thereby holding the grips or teeth cither on one side or the other to
enable reverse motion of the engine to take place. These cross pieces

page_text: are worked together by a connection rod k, which is at hand to the
driver in all cases.
Figure 3 represents an improved form of boiler for the generation of
steam, said boiler being fitted with what I term parallel departments.
The heated products from the furnaces rise between the compartments a
containing the water by the spaces 6 left between same and into the
chimney c, and thence conveyed down the side or back of the boiler by.
a descending pipe or flue d or suitable arrangements to the furnace, as
in Fig. 4, or if necessary under the fire-bars, as in Fig. 3, and the
products by this means are conveyed 'to the furnace and completely
burnt, so that I thus effect the complete consumption of smoke. Should
the smoke not freely pass into the descending pipe or flue da force
pump may be placed in connection with same to force the products
down to and into the furnace, to be therein consumed.
Figure 4 is view of another form of the boiler. The boiler is con-
structed similar to that shewn in Figure 3, but instead of parallel
compartments corrugated or cogged compartments a' are used, arranged
vertically, as shewn, or as in Figure 5 said cogged compartments a¹ may
be arranged horizontally.
Having now particularly described and ascertained the nature and
object of the said Invention and in what manner the same is to be
performed or carried out in practice, I hereby declare that I claim the
Invention of "Improvements in Obtaining and Applying Motive Power,"
substantially as the same is herein-before set forth and described and
illustrated by the accompanying Drawings.
In witness whereof, I, the said Richard Bevan, have hereunto set
my hand and seal, this Seventeenth day of March, in the year
of our Lord One thousand eight hundred and seventy-six.
30 Witness,
R. W. G. BEVAN.
RICHP. BEVAN. (L.S.)