Improvements in Mills for Grinding Coffee and the like.
Year: 1893

page_text: Date of Application, 20th June, 1893
Complete Specification Left, 16th Jan., 1894-Accepted, 17th Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements in Mills for Grinding Coffee and the like.
A communication from ERNST OSCAR LEINBROCK, of Gottleuba, in the Kingdom
of Saxony, German Empire.
I, Alfred JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:-
The present invention relates to a mill for grinding coffee, spice and the like, in
which the mill-ring as well as the mill-block is formed by pressure, the teeth
serving for disintegrating the grain being simultaneously formed therewith and
from which mill the disintegrated grain or material is not as in the usual manner
discharged to the receiver through the bottom but through the hollow block by
means of apertures provided in the walls of said block.
For manufacturing the mill-block and mill-ring cylindrical or conical sleeves of
metal are used, which by pressure are brought into the form desired, whereby
tooth-like ribs which serve for disintegrating the grain are simultaneously formed.
The mill-block is at its lower part cylindrical while the upper part is conical and
provided with spiral teeth. The lower cylindrical part of the mill-block forms
with the conical mill-ring the grinding surfaces while the teeth at the upper part of
the mill-block serve for the preparatory breaking and conveying or feeding down-
wards of the grain. As the operating surfaces do not touch each other they are
subjected to very little wear. In the lower part of the hollow mill-block are
provided apertures or slits through which the ground material must pass to reach
the receiver. As the size of the apertures remains unchanged the mill will always
grind the material uniformly.
Dated this 20th day of June 1893.
W. P. THOMPSON & BOULT,
Of London, Nottingham, Liverpool, and Manchester,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Mills for Grinding Coffee and the like.
A communication from ERNST OSCAR LEINBROCK, of Gottleuba, in the Kingdom
of Saxony, German Empire.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent 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 :-
The present invention relates to a mill for grinding coffee, spice and the like, in
which the mill-ring as well as the mill-block are hollow bodies, stamped or formed
by pressure, and the ground material does not fall through the bottom of the mill-
ring into the receiver, in the usual manner, but escapes into the same through
suitable openings formed in the lower part of the coned periphery of the mill-
block.

page_text: In the accompanying drawings
Fig. 1 is a side-view of the mill-block;
Fig. 2 is a view of the same as seen from above partly in section ;
Fig. 3 is a side view of the mill-ring, partly in section;
Fig. 4 is a view of the same seen from above partly in section;
Fig. 5 is a complete view of the same, from above;
Fig. 6 shows a view of the entire apparatus fixed together on the central shaft,
partly in section.
The hollow mill-block a and mill-ring bare formed of metal.
The hollow mill-block a has its lower part in the form of a cylinder, and is
provided with spiral ribs on its outer surface, while its upper part is conical in
form and is fitted with several pointed screw-formed or spiral teeth c. The lower
cylindrical ribbed part of the hollow mill-block, in conjunction with the slightly
coned mill-ring forms the actual grinding surface of the mill, while the upper
toothed portion breaks up the substance to be ground and passes the fragments
downwards for the grinding process. As the working surfaces do not absolutely
touch one another they are subject in only a small degree to wear and tear.
the lower part of the hollow mill-block a round or slit-shaped apertures e and in
its bottom edge notches or grooves n are cut, through which the meal or other
ground substance must pass, to find its way through the open end, of the mill-block
into any suitable receptacle provided underneath the mill.'
In
Meal or the like can only issue from the mill in such a state of comminution as
corresponds to the degree of fineness of the outlet-orifices; and as the size of these
openings is always the same, the mill will always deliver meal of the same
fineness.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent and in what manner the
same is to be performed I declare that what I claim is ;-
1. Mills for coffee and the like wherein the mill-block (a) is formed hollow and
in its lower part is provided with spirally formed ribs (r) and also with openings
such as e while its upper part is provided with large spirally formed teeth substan-
tially as described and illustrated in the accompanying drawings.
2. Mills for coffee and the like whereof the hollow mill-block (a) on its
cylindrical part is provided with spiral ribs (r) on the outer surface as well as with
slits or openings such as e near the lower end of the wall or periphery substantially
as described and illustrated in the accompanying drawings.
3. Mills for coffee and the like with a hollow mill-block (a) whereof the lower
part is cylindrical in form and provided with a number of slits such as e at a short
distance apart close to its lower edge and with notches or grooves such as n cut in
the latter substantially as described and illustrated in the accompanying drawings.
Dated this 16th day of January 1894.
W. P. THOMPSON & BOULT,
Agents for the Applicant.