IMPROVE- MENTS IN STREET SWEEPING MACHINES.
Year: 1875

page_text: LETTERS PATENT to George Case, of the Bristol General Hospital,
in the City and County of Bristol, for the Invention of "IMPROVE-
MENTS IN STREET SWEEPING MACHINES.'
"
Sealed the 17th March 1876, and dated the 4th October 1875.
PROVISIONAL SPECIFICATION left by the said George Case at the
Office of the Commissioners of Patents, with his Petition, on the
4th October 1875.
I, GEORGE CASE, of the Bristol General Hospital, in the City and
County of Bristol, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN STREET SWEEPING MACHINES," to be as follows:-
This Invention has for its object to improve the construction of street
sweeping machines to load the dirt as it is swept up into a cart. For
this purpose a revolving brush, or by preference two brushes, are used
to sweep the dirt up an incline into a gutter placed crosswise of the
machine. The dirt as it is swept up into the gutter is carried along
the gutter by a series of buckets on an endless chain supported upon

page_text: d
•
three rollers or wheels, two of which are near the ends of the gutter,
whilst the third is carried at the upper end of an inclined frame. The
buckets after they have travelled from end to end of the gutter are
carried by the chain up an incline carrying the dirt along with them,
and deliver the dirt at the top of the incline into a cart, and then again
descend to again sweep along the gutter. The buckets are of an L shape,
and are jointed to the endless chain at the centre of one of their
sides.
د
The lower end of the triangular frame which carries the brushes, the
gutter and the elevator is supported by wheels, from which motion is
transmitted to the revolving brush or brushes and to the endless chain of
the elevator. The endless chain of the elevator receives its motion from
the chain wheel over which it passes at the top of the incline, the wheel
itself being driven by an inclined shaft and bevel gear from one or both
of the driving wheels.
By giving motion to the elevator from the top, as above described, the
chain carrying the ascending buckets is always maintained taut, and
works with less friction than when driven from its lower end. The
brushes are whole bristled instead of being in lines apart from one
another as heretofore usual, and revolve upon a fixed shaft, being driven §
at their ends by toothed wheels from the driving wheels as above
described.
The fore part of the frame of the machine is supported by a central
wheel, provision being made for raising and lowering this end of the
frame to accommodate it to different heights of carts. The machine 2
may also be readily attached to or detached from carts, as with machines
heretofore constructed.
By constructing sweeping machines in the manner above described,
they may be constructed much lighter than heretofore, and the draught
of the machines is also materially lessened; the machines can also
better adapt themselves to inequalities of the road.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Case in the Great Seal Patent Office
on the 4th April 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
CASE, of the Bristol General Hospital, in the Oity and County of Bristol,
send greeting.
'
WHEREAS Her most Excellent Majesty Queen Victoria, by. Her
Letters Patent, bearing date the Fourth day of October, 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 successors, give
and grant unto me, the said George Case, Her special license, that
I, the said George Case, my executors, administrators, and assigns,
or such others as I, the said George Oase, my 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 STREET SWEEPING
MACHINES," upon the condition (amongst others) that I, the said George
Case, 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 Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said George Case, do hereby declare
the nature of the said Invention, and in what manner the same is to bo
performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say ::
This Invention has for its object to improve the construction of street
sweeping machines to load the dirt as it is swept up into a cart.
For
this purpose a revolving brush, or by preference two brushes, are used
to sweep the dirt up an incline into a gutter placed crosswise of the
machine. The dirt as it is swept up into the gutter is carried along
the gutter by a series of buckets or scrapers on an endless chain sup-
ported upon three rollers or wheels, two of which are near the ends of

page_text: the gutter, whilst the third is carried at the upper end of an inclined
frame. The buckets after they have travelled from end to end of the gutter
are carried by the chain up an incline, carrying the dirt along with
them, and deliver the dirt at the top of the incline into a cart, and then
again descend to again sweep along the gutter. The scrapers or buckets
are of an L shape and are jointed to the endless chain at the centre of
one of their sides.
The lower end of the triangular frame which carries the brushes, the
gutter and the elevator is supported by wheels, from which motion is
transmitted to the revolving brush or brushes and to the endless chain
of the elevator. The endless chain of the elevator receives its motion
from the chain wheel, over which it passes at the top of the incline, the
wheel itself being driven by an inclined shaft and bevil gear from one
or both of the driving wheels.
By given motion to the elevator from the top, as above described, the
chain carrying the ascending scrapers or buckets is always maintained
taut, and works with less friction than when drivon from its lower end.
The brushes are whole bristled instead of being in lines apart from one
another as heretofore usual, and revolve upon a fixed shaft, being driven
at their ends by toothed wheels from the driving wheels, as ahove
described.
The fore part of the frame of the machine is supported by a central
wheel or wheels, and provision may be made for raising and lowering
this end of the frame to accommodate it to different heights of carts.
The machine may also be readily attached to or detached from carts, as
with machines heretofore constructed.
By constructing sweeping machines in the manner abovo described
they may be constructed much lighter than heretofore, and the draught
of the machines is also materially lessened; the machines can also
better adapt themselves to incqualities of the road.
In the drawing hereunto annexed I have shewn a street sweeping
machine constructed as above described.
Figure 1 shows a side view of the machine, and Figure 2 a plan
view.
In these Figures A, A, arc heavy cast-iron 'driving wheels; B, B, are
spur wheels geared by means of clutches to the wheels A; C, C, are

page_text: and when the machine is turning either way one of the brushes continues
to sweep the larger space of ground travelled over.
Fourth. Driving the endless chain of scrapers from the upper part
of the machine so as to keep the chain taut on the loading sido, sub-
stantially as described.
In witness whereof, I, the said George Casc, have hereunto set
my hand and seal, this Thirtieth day of March, in the year of
our Lord One thousand cight hundred and soventy-six.
GEORGE CASE. (L.S.)
March 30th 1876.