IMPROVEMENTS IN MILLS OR MACHINES FOR GRINDING AND MIXING TEA AND OTHER SUBSTANCES
Year: 1879

page_text: LETTERS PATENT to John Bartlett, of the Firm of J. Bartlett and Sons, of the
City and County of Bristol, for the Invention of "IMPROVEMENTS IN MILLS
OR MACHINES FOR GRINDING AND MIXING TEA AND OTHER SUBSTANCES."
Sealed the 23rd September 1879, and dated the 18th July 1879.
PROVISIONAL SPECIFICATION left by the said John Bartlett at the Office
of the Commissioners of Patents on the 18th July 1879.
JOHN BARTLETT, of the Firm of J. Bartlett and Sons, of the City and County of
Bristol. "IMPROVEMENTS IN MILLS OR MACHINES FOR GRINDING AND MIXING TEA
AND OTHER SUBSTANCES.'
رو
My Invention relates to improvements in those machines consisting of a combined
mill and mixer employed for grinding and mixing tea and granular substances.
The improvements have for their chief object to reduce the head room required for
the combined machine, and enable the mill and mixer to be used either in conjunc-
tion with one another or separately, or for operating on different substances at one
and the same time:
I attain this result by such a relative arrangement of the mill and mixer as will
lessen the total height of the machine, and by the combination therewith of a shoot
capable of being adjusted to deliver from the mill either into the mixer or into
another receptacle placed alongside.
Instead of placing the mill directly over the top of the mixer, as hitherto, I mount
it to one side thereof, so that as the mixer is cylindrical I am enabled to place the
mill at lower level than usual. The end frames of the casing in which the mixing
cylinder is mounted are cast of a suitable shape to support the mill in this position,
and between them 'directly beneath the mill I mount a shoot on a horizontal axis
supported in the end frames. By inclining this shoot in the one direction or the
other the mill delivers either into the mixing cylinder through the usual opening
in the circumference thereof, or into another receptacle alongside, as the case
may be.
The mixing cylinder discharges into a receiver fitted beneath it in a suitable
opening in the frame. This drawer extends beneath the whole length of the mixing
cylinder, and is provided with a fall down front and side cheeks, so that it may
either form a drawer or a tray from which the tea or other substance may be
shovelled whilst the mixer continues in action. When used as a drawer the front
is raised and locked to the sides by a pivoted shutter bar engaging in staples
thereon, so that the entire drawer may be pulled out by handles on the front.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John-Bartlett-in-the-Great Seal-Patent-Office-on-the 17th January
1880..
JOHN_BARTLETT, of the Firm of J. Bartlett and Sons, of the City and County
-of-Bristol. "IMPROVEMENTS IN MILLS OR MACHINES FOR GRINDING AND MIXING
TEA AND OTHER SUBSTANCES."
'
My Invention relates to improvements-in-those-machines-which-consist of a
combined mill and mixer, and are employed for breaking or grinding and mixing
tea and granular substances. The improvements have for their chief object to
reduce the head room required for the combined machine, and enable the mill and
mixer to be used either in conjunction with one another or separately, or for
operating on different substances at one and the same time. I attain this result
by such a relative arrangement of the mill and mixer as will lessen the total height
of the machine, and by the combination therewith of a shoot capable of being
adjusted to deliver from the mill either into the mixer or into another receptacle
placed alongside. Instead of placing the mill directly over the top of the mixer, as
hitherto, I mount it to one side thereof, so that as the mixer is cylindrical I am
enabled to place the mill at a lower level than usual. The end frames of the casing
in which the mixing cylinder is mounted are cast of a suitable shape to support the
mill in this position, and between them directly beneath the mill I mount a shoot
on a horizontal axis supported in the end frames. By inclining this shoot in the
one direction or other the mill delivers either into the mixing cylinder through the
usual opening in the circumference thereof, or into another receptacle alongside, as
the case may be.
The mixing cylinder discharges into a receiver fitted beneath it in a suitable
opening in the frame. This receiver extends beneath the whole length of the
mixing cylinder, and is provided with a fall down front and side cheeks, so that it
may either be used as a drawer, or by lowering the front as a tray, from which the
tea or other substance may be shovelled whilst the mixer continues in action without
removing the tray from under the. mixer. When used as a drawer the front is
raised and locked to the sides by a pivoted shutter bar engaging in staples thereon,
so that the entire drawer may be pulled out by handles on the front.
Figure 1 is a perspective elevation of the improved combined mill and mixer, the
shoot being inclined away from the mixing drum so as to deliver from the mill
into a sack or other receptacle alongside, and the fall down front of the tray being
open.
Figure 2 is another perspective elevation of the same machine, the fall-down-front-
of the tray being closed.
A is the breaking or grinding mill; B, the mixing drum or cylinder; and C, the
shoot. The mill A is constructed and operates in the usual way, and it is therefore
unnecessary to illustrate its internal construction; it is supplied from a hopper D
above, as in ordinary. The drum B is also constructed in the usual way, and its
shaft b is mounted in antifriction roller bearings, and may be driven by a winch
handle applied directly to it, as in Figure 2, or geared with it by wheel and pinion,
as in Figure 1. B¹ is the opening at which the tea or other substance to be mixed
is introduced; it is closed by a sliding door or cover when the drum is in motion.
The shoot C is mounted on a pivot c at each end, one or both of which passes
through the end frames E of the machine, and has a hand wheel or handle applied.
by which the shoot may be adjusted either in the position shown, or (when opening,
B is brought opposite to it) in that indicated by dotted lines, in which latter
position it delivers through said opening B' into the drum.

page_text: It will be observed that by placing the mill A for breaking the tea to one side
of the drum B, instead of directly over it as hitherto, I am enabled to place the
mill at a lower level than the top of the drum, and to diminish the height of the
frames E, and likewise the total height of the machine. The end frames E are cast
of the form shown, and are bolted to the side framing so as to be readily taken
apart. F is the tray or drawer passing through an opening in the end frame E;
it has a fall down front F¹ hinged to the bottom and side cheeks f. When closed,
as in Figure 2, this front is locked by a shutter bar G pivoted at g to the front F¹,
passing through slotted guides g² thereon, and engaging in staples g³ fixed to
frame E, and passing through slots in front F¹.
Having described the nature of my Invention, and the manner of performing the
same, I declare that what I claim as my Invention to be protected by the herein-
before in part recited Letters Patent is,-
1st. The relative arrangement of the mill and mixer, whereby the height of the
machine is diminished without decreasing the size of the mixing drum, substantially
as shown and described.
2nd. The combination and arrangement of the mill, the mixing drum, and the
adjustable shoot, substantially as and for the purpose shown and described.
3rd. In a combined mill and mixing machine the tray or drawer with fall down
front and means for locking the same, substantially as shown and described.
In witness whereof, I, the said John Bartlett, have hereunto set my hand and
seal, this Sixteenth day of January, in the year of our Lord One thousand
eight hundred and eighty.
TAITA
ומגד החזית
JOHN BARTLET.
(L.S.)