IMPROVEMENTS IN REGULATING THE PASSAGE OF AIR IN MIDDLINGS PURIFIERS
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I THOMAS NIELD ROBINSON of Railway Works Rochdale in the county of
Lancaster Engineer do hereby declare the nature of my said invention for
IMPROVEMENTS IN REGULATING THE PASSAGE OF AIR IN MIDDLINGS PURIFIERS
to be as follows:-
The object is to provido means wheroby air is caused to flow evenly and
regularly through every portion of a screen or sieve in a middlings purifior.
For the above purpose I interpose between the screen or sieve and the fan or
suction appliance an interceptor having louvre boards or ways passages or slits sọ
disposed as to present increased area for the passage of air, the further they are
from the fan or suction appliance and I employ in conjunction therewith one or
moro gridiron or like valves so placed and made that they may be regulated and
adjusted with ease to allow only the desired quantity of air to flow through the
screen or sieve.

page_text: CORTELE
"
I THOMAS NIELD ROBINSON of Railway Works, Rochdale, in the County of
Lancaster Engineer do hereby declare the nature of the said invention for
"IMPROVEMENTS IN REGULATING THE PASSAGE OF AIR IN MIDDLINGS PURIFIERS
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
The object is to provide means whereby air is caused to flow evenly and
regularly through every portion of a screen or sieve in a middlings purifier.
For the above purpose I interpose between the screen or sieve and the fan or
suction appliance an interceptor having louvre boards or ways passages or slits so
disposed as to present increased area for the passage of air the further they are
away from the fan or suction appliance, and I employ in conjunction therewith
one or more gridiron or like valves so placed and made that they may be regulated
and adjusted with ease to allow only the desired quantity of air to flow through
the screen or siove.
The drawing hereunto appended is a vertical section of so much of a middlings
purifier as is necessary to illustrate the means employed in carrying my invention
into effect a casing b screen or sieve c ways for admitting air beneath the screen or
sieve bd fan at top of case for drawing air from the screen 6 Any suitable
suction appliances may be used instead of tho fan, such as a Roots blower.
'Between the fan d and the screen b is interposed on intercepter e having ways
passages or slits f therethrough of smaller area the nearer, the fan or suction
appliance and of increasing area the further they are away from the said fan, or
suction appliance, g aro gridiron valves placed at convenient positions in the air
ways to allow of the speed of flow of air through such ways being regulated and
controlled.
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•
It will be obvious that a series of screens or purifiers may be employed in
combination with one fan or suction appliance and the passage of air be controlled
by interceptors and valves under my invention so that it flows at the desired speed
through each screen or purifier.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
First Regulating the passage of air in middlings purifiers by means of inter-
cepters constructed and arranged substantially as setforth.
Second Regulating the passage of air in middlings purifiers by means of
intercepters and valves constructed and arranged substantially as herein setforth.

page_text: Third In middlings purifiers the combination of suction appliances air ways
and intercepters substantially as herein specified for the purpose set forth.
Fourth In middlings purifiers the combination of suction appliances air ways
intercepters and valves substantially as herein specified for the purposes set-
forth.
Daind th_2_212
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