IMPROVEMENTS IN FILTERS
Year: 1880

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine, Lake,
& Co., Patent Agents, Southampton Buildings, London, for an Invention of
"IMPROVEMENTS IN FILTERS." A communication from abroad by The Boston
Water Purifier Company, of Portland, Maine, United States of America.
COMPLETE SPECIFICATION filed by the said William Robert Lake at the
Office of the Commissioners of Patents on the 19th July 1880.
WILLIAM ROBERT LAKE, of tho Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN FILTERS." A communication
from abroad by The Boston Water Purifier Company, of Portland, Maine, United
States of America.
This Invention relates to improvements in filters chiefly designed for filtering
water, and has for its object such a construction of the said filters that by pointing
ȧ handle or indicator in an upward direction the water is filtered, by pointing it in
à downward direction the filter is cleansed, by pointing it forty-five degrees to the
left of a vertical line the filter is cleansed in a reverse direction, and by pointing it
horizontally to the left the water passes through unfiltered.
My Invention is illustrated in the accompanying Drawing, in which,-
Figure 1 is a front elevation of the filter with the handle turned into the position
for filtering, and
Figure 2 is a vertical section of the same.
Figure 3 is a similar section with tho parts in the position for the first cleaning,
and
Figure 4 is a similar section of a portion of the filter with the parts in the
position for the second cleansing.
Figure 5 is a horizontal section of the plug in position for filtering.
Figure 6 is a horizontal section with the plug in the position for passing the
water through unfiltered.
Figure 7 is a vertical transverse section of the said plug taken through the
central hole therein.
Like letters indicate the same parts throughout the Drawing.
A is a chamber containing charcoal or other suitable substance held in place by

page_text: wire gauze a, a, above and below, and supported by perforated plates b, b. B and
Care respectively the top and bottom plates closing the chamber, the perforated
plates b, b, being prevented from becoming loose, and lying against the plates B, C,
by means of rings or guards d, d.
D is the faucet or cock having passages e and f, the former leading to the carbon
chamber A and the latter to the vertical tube g, which passes through the carbon
chamber and opens into the chamber above the gauge à and plate b; h represents
the passage which leads to the supply-pipe; h, the passage leading to the house
pipe; and, the passage leading to the wasto pipo; all of the said passages connect
with the plug.
His the plug having the handle or pointer m fixed to its forward end or sido,
and having the grooves or channels p, q, 8, and v of the peculiar shapo shown, and
a hole t. The operation of the said filter is as follows:-
To filter the water the pointer m is turned upward, thus bringing the plug into
the position shown in Figures 1, 2, and 5. When the plug is in this position the
water enters through passago h in the pipe E, passes through the channel p in the
plug, and passage e in the faucet up through the carbon chamber, and down through
the tube g, the passage f, the plug-channel q, and the passagok into the house
through the pipe F.
-To-cleanse-the-filter-the-pointer m-is turned-downward, thus reversing the plug.
and bringing it into the position_shewn in Figure 3. The water then passing
through the passago h in the pipe E passes through channel q in the plug into the
passage, thence up through the tube g down through the carbon through the
passage e, the plug channel 8, holo t, and out through the hole into the waste-
pipe Ğ.
To cleanse the filter a second time for the purpose of removing the filter-full of
uncleansed water, which still remains in the same, I give the pointer about three-
eighths of a turn to the left from its downward position, thus bringing the plug
into the position shown in Figure 4; the water then passes from the passage h
through the connection p¹ into the plug-channel p, thence into the passage e, up
through the carbon (washing out the water remaining there), down through the
-tube-g, the passage-f-the-connecting-end--into-the-channel-, and-through-it-into
the hole t, and thence through the front s' of the channel 8, which enters through
the hole t into the passugo of the waste pipe.
A hole bored through the plug, and represented by dotted lines v, may be used
instead of the channel v if desired.
To allow the water to pass through unfiltered the pointer is turned horizontally
toward the house-pipo F, bringing the plug into the position shown in Figure 6;
the water then passes from the passage in the supply pipe E, through the hole t
in the plug, and into the passage in the house pipe F.
It will therefore be seen that by means of the handle or pointer, and with a
single cock, first, the water may be filtered; second, the plug reversed and the
filter cleansed; third, the plug turned again and the filter full of water left purified ;
and fourth, the water passed through unfiltered.
Having thus fully described the said Invention as communicated to me by my
foreign correspondents, and the manner of performing the same, I wish it understood
that I claim,
First. In a filter the combination with the faucet having the passages e and f
of the plug having the channels p and q, substantially as above set forth and for
the purpose specified.
Second. In a filter the combination with the faucet having the passages e and f
of the plug having the channels q and 8, the hole t, and the waste pipe G, substan-
tially as above set forth and for the purpose specified.
Third. In a filter the combination with the faucet having the passages e and fof
the plug having the channels p and 8, and the channel or hole v and the waste-
pipe G, substantially as above set forth and for the purpose specified.

page_text: Fourth. The combination of the carbon-chamber provided with the tube g, the
gauze a, a, the plates b, b, and the guards d, d, the faucet provided with the
passages e, f, the plug having the channels p, q, 8, v, and the pointer m, all
arranged substantially in the manner and for the purpose herein set forth.
In witness whereof, I, the said William Robert Lake, have hereunto set my
hand and seal, this Nineteenth day of July, in the year of our Lord One
thousand eight hundred and eighty.