IMPROVEMENTS IN MACHINERY OR APPA- RATUS FOR ROAsting Coffee, CHICORY, AND OTHER SIMILAR SUBSTANCES
Year: 1881

page_text: LETTERS PATENT to Marshall Robinson, of Manchester, in the County of
"
Lancaster, for an Invention of IMPROVEMENTS IN MACHINERY OR APPA-
RATUS FOR ROAsting Coffee, CHICORY, AND OTHER SIMILAR SUBSTANCES."
PROVISIONAL SPECIFICATION left by the said Marshall Robinson at the
Office of the Commissioners of Patents on the 30th December 1881.
MARSHALL ROBINSON of Manchester in the County of Lancaster. "IMPROVE-
MENTS IN MACHINERY OR APPARATUS FOR ROASTING COFFEE CHICORY AND OTHER
SIMILAR SUBSTANCES."
The object of this Invention is the construction of a machine which without
any alteration is capable of roasting coffee or chicory or other similar substance
and which shall not only occupy much less space be considerably lighter in weight
and perform more work in a given time than the machines hitherto used for the
same purpose but shall be capable of being attended to by one person instead of
two or more being required as heretofore.
In carrying out my Invention I mount a pan of suitable diameter upon pivots
in a framework and surrounding this pan I arrange an annular casing which also
extends underneath the pan and forms a chamber for by preference a Bunsen gas
burner which constitutes the heating medium or such burner may be replaced by a
furnace or fire-place in which case the casing forms the flue leading to the chimney.
Over the centre of this pan I further arrange a vertical shaft which carries »
series of arms or stirrers for stirring the coffee or other substance to be roasted in
the pan this shaft being carried by a frame which by means of a pair of toothed
racks working into rresponding toothed pinions keyed upon a counter shaft is
capable of being raised up bodily along with the stirrers and cover of the pan
when it is desired to empty the contents and by means of another shaft carrying
the requisite bevil gearing impart revolving motion to the stirrers. Frictional
bevil gearing is also applied to the two shafts so that by moving a lever to or fro
the pan can be tilted or the stirrers raised at pleasure.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Marshall Robinson in the Great Seal Patent Office on the 30th June
1882.
"IMPROVE-
MARSHALL ROBINSON of Manchester in the County of Lancaster.
MENTS IN MACHINERY OR APPARATUS FOR ROASTING COFFEE, CHICORY AND OTHER
SIMILAR SUBSTANCES."
The object of this Invention is the construction of a machine which without any
alteration is capable of roasting coffee, or chicory or other similar substance and
shall not only occupy much less space, be considerably lighter in weight and
perform more work in a given time than the machines hitherto used for the same
purpose, but shall be capable of being attended to by one person, instead of two or
more being required as heretofore.
And in order that this my said Invention may be the more readily understood and
carried into practical effect I have hereunto annexed a Drawing illustrative of my
improvements and will now proceed to describe the same with the assistance of the
figures and letters of reference marked thereon.
Fig. 1 is a front view and Fig. 2 a side view of my improved roasting apparatus.
Fig. 3 is a sectional plan of Fig. 2 across the line a-b and Fig. 4 is a front sectional
view of Fig. 2 across the line c-d. Fig. 5 is a plan of the top gearing.
In all the views A is the cast iron pan of suitable diameter for containing the
coffee, chicory or other substance to be roasted and which is mounted upon the
pivots B in the cast iron.frame-work-C-and-secured-in-the-horizontal-position-by-
the locking lever B¹. Surrounding this pan A I arrange an annular casing A¹
which also extends underneath the pan and there forms a chamber for (by
preference) a series of Bunsen gas-burners D. These burners D constitute the
heating medium the products of combustion being carried off through the
telescopic chimney D' leading into any convenient flue-or such burners may be
replaced by a furnace or fire-place (or other suitable beating medium) in which
case the casing A' forms the flue leading to the chimney. Over the centre of this
pan I arrange a vertical shaft E which carries a series of arms E' supporting the
adjustable stirrers E' for stirring the coffee or other substance to be roasted. These
stirrers which consist of metallic blades or plates as illustrated, are capable of being
adjusted in height from the bottom of the pan A and also in their angle with regard
to and distance from the central axis and from each other as illustrated.
central shaft E is supported in bearings in the cross head F and in the top or
cover E of the pan and is capable of being raised up bodily along with such cover
and the stirrers when it is desired to tilt the pan A for the purpose of emptying
its contents the cover E³ being guided up and down in slots A2 formed in the
cast iron sides C and being suspended by means of the chains G passing over the
chain wheels H upon the counter-shaft I and guide pullies H¹ and counterbalanced
by the weights J.
This
Revolving notion is imparted to this shaft E and to the stirrers by means of the
driving shaft K and bevil gearing L whilst by means of the friction bevil
gearing M and double coupling boxes M¹ the operator can by moving the lever N
in the direction of the arrow, cause the cover of the pan to be raised simultaneously
with the stirring mechanism and then by pulling such lever in the contrary
direction the pan can be tilted-this last operation being effected by the cord or
chain O secured at one end to the lever P mounted upon one of the pivots B,
.winding itself round the shaft I to which the other end of such chain is secured―
or such pan may be tilted by the operator raising the lever P by hand. It will be
readily observed that the pan A can be locked in the tilted position by means of
the catch Q being placed beneath the short arın of the lever P.

page_text: The action and mode of using this machine may be described as follows:-The
coffee, chicory or other material to be roasted being supplied to the hopper R all
that is necessary is to open the back hinged portion S of the cover E and to allow
a sufficient quantity of the substance to be roasted to fall from the hopper into the
pan A-the gas burners D, having been meanwhile ignited the stirrers E are set in
inotion by passing the driving belt on to the fast pulley T. When sufficiently
roasted which can be readily ascertained by raising the front hinged portion U of
the lid or cover E³, the strap is passed from the fast on to the loose pulley T' (to
which the grooved friction bevil wheel M is affixed) the stirrers are raised up by
pushing the lover N in the direction of the arrow, this causes the counter shaft I
to revolve (by putting the friction apparatus in gear) and in so doing to wind up
the chains G and so to raise the cover E³ and stirrers E simultaneously-and which
are retained in their raised position by the pawl a taking into one of the teeth of
the ratchet wheel b. To tilt the pan A for the purpose of facilitating the removal
of its contents through the hinged door V upon the front of the pan, which is first
opened, it is only necessary to draw back the locking lever B' and then either to
reverse the position of the lever N by pulling it in the contrary direction to the
arrow, when the chain O becomes wound round the shaft I or such pan can be
tilted by means of the hand lever P.
Having thus particularly described and ascertained the nature of this my said
Invention together with the best methods with which I am acquainted for carrying
the same into practical effect, I wish it to be distinctly understood that I do not
confine myself to the precise details, relative proportions or dimensions of the
various parts of the improved roasting apparatus for coffee, chicory and other similar
substances, herein before described and illustrated on the accompanying Drawing
as the same may be considerably varied without departing from the Invention, but
what I claim in such apparatus is :-
1st. The general construction and arrangement of apparatus for roasting coffee,
chicory and other substances substantially as herein before described and illustrated
on the accompanying Drawing.
2nd. Constructing the pan of roasting apparatus with a surrounding casing and
heating the same substantially as herein before described and illustrated on the
accompanying Drawing.
3rd. The construction and arrangement of scrapers or stirrers and mode of
adjusting the same substantially as and for the purposes herein before described and
illustrated on the accompanying Drawing.
4th. The combination and arrangement of mechanism for raising the cover of the
pan and the stirring mechanism simultaneously substantially as and for the purpose
herein before described and illustrated on the accompanying Drawing.
5th. Mounting the pan on pivots for facilitating the emptying of its contents and
operating the same as hereinbefore described and illustrated on the accompanying
Drawing.
In witness whereof I the said Marshall Robinson have hereunto set my
band and seal this 28th day of June, in the year of our Lord 1882.