US391328A - Filter - Google Patents

Description

(No Model.)

J. J. MQTIGHE.

FILTER.

No. 391,328. Patented Oct. 16, 1888.

N. PETERS Phokrmfwgnpmr. Wuhillglnm D. C.

UNITED STATES PATENT Gtrrcn.

JAMES J. MOTIGHE, OF PITTSBURG, PENNSYLVANIA.

FILTER.

$PBCIPICATION forming part of Letters Patent No. 391,328, dated October 16, 1888.

Application filed July 26, 1887.

To aZZ whom, it 12mg concern.-

Be it known that l, JAMES J. MOTIGHE, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Filters; and I do hereby declare the following to be a full, clear, and exact description of the invention, reference beinghad to the accompanyingdrawings, which form part of this specification.

This invention has relation to filters for liquids, and has for its object the provision of means whereby the filter is caused to thoroughly and automatically cleanse itself of all accumulated impurities and remain constantly in a condition for supplying pure clean liquid.

The purpose and effect of my invention are to render the cleansing operation by the action of the water automatic, using filtered water as the cleansing medium.

My invention accordingly consists, first, in the provision of means and in the method of producing a counterfiow automatically and without arresting the filtering operations.

In the accompanying drawings, Figure 1 is a vertical central section of a filter embodying my invention. Fig. 2 is a similar section of a modified form of filter, and Fig. 3 a top view of the valveoperat-ing mechanism.

My improvements are especially applicable to that form of filter wherein two or more similar filtering-chambers are employed, each containing a plate, diaphragm-bed, or porous cup, and my invention does not necessitate any change whatever in the internal arrangements.

Taking the filter shown in Fig. l as an illustration or example, A designates the body of the filter divided into two chambers, A A by a vertical partition, B. Each chamber is subdivided into two compartments by a filtering diaphragm, C, of any suitable material.

D represents the water-supply branches at d, one branch leading to one compartment of a filtering-chamber, preferably in the present instance to the innermost compartment.

E E are pipes leading from the two outer compartments, respectively, and uniting at c, whence a single pipe, E, leads to the point of usage. At the junction of the branches (Z d with the main supply D a valve or cock, G,

Serial No. 245,346. (No model.)

is located, having three ports, 9 9 the port g communicating with the supply-pipe D,and the other two being so arranged that communication will be alternately established between the pipes d d and the waste-pipes h h. This valve is reversible, so that interchange ably the filter-compartments are brought into communication with the supply and outlet. At the junction of the pipes E E with the main outlet F another valve or cock, G, is located. This valve is constructed with a port,

f, to communicate with one of the pipes E E; and with a smaller port, f, forming a communication between the two pipes E E. The valve G is also reversible, and is connected by a rod, H, to the valve G. Both valves are' rotary and operate simultaneously.

Various expedients may be employed for automatically turning the valves. It will be suffieient to suggest the device shown in the drawings, which consists of a rock lever or arm, K, coupled to the valve G and supporting a bucket, r, at either end. The outlet- J pipe from the valve G is branched, so as to '75 lead to the two buckets.

The operation is as follows: The supply be ing turned on, unfiltered water flows into the inner compartment of one chamber and passes through the filtering-diaphragm, and thence by way of one of the outlet branches. Aportion of the filtered water escapes by way of the valve G and passes downward in a reverse direction through the chamber, escaping by way of the outlet in the valve G and by way of one of the outlet branches into one of the buckets. XV hen the latter is filled, its weight tilts the lever K and reverses both valves. The supply then takes a contrary direction, while a portion of the filtered water passes downwardly through the filtering-diaphragm of the first chamber, thus thoroughly cleaning the latter of all accumulations that have resulted from its previous use. The operation continues so long as there is any supply. 5 As each bucket descends, it is emptied by the opening of a valve in its bottom or by tilting or other suitable means.

The valve-controlling lever K is prevented from being slowly or gradually moved while a bucket is being filled by any suitable device as, for instance, the springs m m, which restrain the lever untila bucket is sufiicientl y filled, the weight then overcoming the spring pressure.

The modified form of filter shown in Fig. 2 has horizontal filteringdiaphragms; but the automatic principle and mode of operation are substantially the same as in Fig. 1.

The filter may be used for other liquids besides water.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-- I 1. A self-cleaning water-filter comprising twin filtering-chambers having inlet and outlet branches andinterposed automatically-operated reversible valves, said valves having ports by which the water from the main source is directed through one chamber and a portion of the water filtered therein directed through the other chamber.

2. A water-filter comprising twin inter changeable filtering-chambers with separate branches to each from the main supply and from each to a common outlet, combined with valves and valve mechanism operated by the weight of the Water, said valves having ports which alternately direct the supply through one chamber and a portion of the filtered water in a reverse direction through the other chamber, substantially as described.

3. In a filter, the combination of the twin interchangeable filtering chambers or vessels '0 O, inlet branches (1 d, outlet branches E E,

JAMES J. MOTIGHE.

Witnesses:

LOUIS MOESER, H. O. EvER'r.

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