US198637A - Improvement in atmospheric filters - Google Patents

Improvement in atmospheric filters Download PDF

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Publication number
US198637A
US198637A US198637DA US198637A US 198637 A US198637 A US 198637A US 198637D A US198637D A US 198637DA US 198637 A US198637 A US 198637A
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atmospheric
filters
improvement
ludlow
filter
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces

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  • FIG. 1 of the drawings is arepresentation of a front view of my improved filter, and Fig. 2 is a cross-section thereof.
  • This invention has relation to improvements in atmospheric filters.
  • the object of my invention is to free the atmosphere of all material impurities, and deliver it perfectly pure to the'cold-air ducts of hotairfurnaces, so that when heated it may pass out of the flues and be distributed without the injurious effects above stated.
  • the nature of the invention consists in two frames, fastened together face to face, each one within the other, and then securedremovablytogether. Between the netting is placed a layer, 0, of cotton-wool or other suitable material, of suflicient thickness to arrest the particles of soot or dust in the air, and to allow air to pass through freely.
  • These frames are placed in a cold-air chamber or duct, and efl'ectually exclude foreign matter from the hot-air chamber of a furnace or other heater.
  • the filter thus formed is perfectly effective of the object sought to be produced 5 but when the filter is or must be placed upon the exterior of a building, I prefer to place a sheet of fine gauze, D, (wire preferably,) on the exterior face of the frame, which is exposed to the weather. This serves to arrest the coarser particles, thereby lessening thefrequency of the necessity of changing the cotton, and, in great measure, to break the 2.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)

Description

R. G. LUDLOW. Atmospheric Filter.
Patented Dec.- 25, 1877.*
x x-xx YYY YYY
YYY
.INVENTOR flaw/x67 4M,
ATTORNEY N PETERS, PHOTO-LITNOGRAPHER, WASHINGTON, D C,
UNITED STAT S PATENT OFFICE.
RICHARD O. LUDLOW, OF ST. LOUIS, MISSOIIRI.
IMPROVEMENT IN ATMOSPHERIC FILTERS.
Specification forming pbrt of Letters Patent N0, 198,637, dated December 25, 1877; application filed November 17, 1877.
To all whom-"it may concern:
Be it known that I, RIGHARD O. LUDLOW, of St. Louis, in the county of St. Louis and State of Missouri, have invented a new and valuable Improvement in Atmospheric Filters; and I do hereby declare that the follow-.
ing is a'full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.
Figure 1 of the drawings is arepresentation of a front view of my improved filter, and Fig. 2 is a cross-section thereof.
This invention has relation to improvements in atmospheric filters.
In regions where bituminous coal is used the atmosphere is saturated with imperceptible particles of soot, which, when admitted to dwellings and other buildings, is deposited on walls, furniture, and other objects, to their great injury and disfigurement.
The object of my invention is to free the atmosphere of all material impurities, and deliver it perfectly pure to the'cold-air ducts of hotairfurnaces, so that when heated it may pass out of the flues and be distributed without the injurious effects above stated.
The nature of the invention consists in two frames, fastened together face to face, each one within the other, and then securedremovablytogether. Between the netting is placed a layer, 0, of cotton-wool or other suitable material, of suflicient thickness to arrest the particles of soot or dust in the air, and to allow air to pass through freely. These frames are placed in a cold-air chamber or duct, and efl'ectually exclude foreign matter from the hot-air chamber of a furnace or other heater.
Being protected from the direct contact of the wind and weather in the said chamber or duct, the filter thus formed is perfectly effective of the object sought to be produced 5 but when the filter is or must be placed upon the exterior of a building, I prefer to place a sheet of fine gauze, D, (wire preferably,) on the exterior face of the frame, which is exposed to the weather. This serves to arrest the coarser particles, thereby lessening thefrequency of the necessity of changing the cotton, and, in great measure, to break the 2. The combination, with the sheets of network B B and an interposed layer of cottonwool, of a sheet of net-work, of a fine mesh, exterior to the sheets B B, substantially as specified.
In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.
RICHARD c. LUDLOW.
Witnesses:
O. P. SAY oR, Enw. WELSH.
US198637D Improvement in atmospheric filters Expired - Lifetime US198637A (en)

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