US939448A - Filter. - Google Patents

Description

I A. G. SHEAK.

FILTER.

I I APPLICATION FILED NOV. 20, 1908. 939,448, Patented Nov.9, 1909. I E 2 SHEETS-SHEET 1. J6 J4 Jill 2f Z6 Jig- 2.

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v FILTER. I APPLICATION FILED NOV. 20, 1908.

939,448, Patented Nov. 9, 1909.

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UNITED sirnrns PATENT OFFICE.

ANDREW G. SHEAK, OF BING-HAMTON, NEW YORK, ASSIGNOR TO THE NINETEEN HUN- DEED WASHER COMPANY, OF BINGHAMTON, 1\TEW YORK, A CORPORATION.

FILTER.

Specification of Letters Patent.

Patented Nov. 9, 1909.

Application filed November 20, 1908. Serial No. 463,669.

To all whom 'it may concern:

Be it known that I, ANDREW G. SHEAK, a citizen of the United States, residing at Binghamton, in the county of Broome and State of New York, have invented a new and useful Filter, of which the following is.

suitable material, while the filtering stone,

isrevolved. In devices of this general class the cylindrical stone is usually cleaned when rotating by a cleanser constructed preferably of a strip of carborundum being brought into contact with the stone by means of a thumb screw located on the out-.

side of the casing of the filtering chamber. It is obvious that if the screw is turned up too far it will make the pressure of the cleanser on the stone too great, inwhich case the stone is held from rotation and cannot be cleaned. On the other hand, if the screw is not turned up far enough the pressure would not be sufficient and no cleaning would result. The regulation of the degree of pressure between the cleansing and the revoluble filtering stone by means of a thumb screw, therefore, is a feature which requires considerable skill on the part of the operator.

The present invention is designed to overcome this difliculty and provide a cleansing device that will always have substantially uniform pressure sufiicient to thoroughly clean the filtering stone without unnecessarily wearing it away.

A further object'of the invention is to provide a cleanser in which means are employed for automatically holding the cleanser against the stone. 7

A still further object of the'invention is to provide a cleansing strip mounting of such nature that the degree of pressure exercised will be to some extent regulated by the variations in degree of hardness or softness of the stone, so that the cylindrical stone will always remain symmetrical.

- A still further object of the invention is to provide a device of this class in which provision is made for holding the cleanser away from the stone when necessary, and especially to lock the cleanser firmly in place in accordance with the invention.

during shipment in order to prevent displacement or breakage.

With these and other objects in view, as

.will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts, hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of. the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings :-Figure 1 is a vertical section of a filter constructed Fig. 2 is a horizontal section of the same. Fig. 3 is a detail perspective view of the cleaner detached. Fig. 4c is a detail section illustrating the construction of the cam by which the cleaning member is actuated. Fig. 5 is a sectional perspectlve vlew lllustrating a slight modification. Fig. 6 is a detail perspective view illustrating a further modification of the cleaner and its controlling means. Fig. 7 is a detail sectional view of the screw employed in the structure shown in Fig. 6. Fig. 8 is a detail perspective view illustrating the construction of the cleaner when employed in connection with large filters.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

'Tl1 filtering casing may be of any capacity in accordance with the quantity of water required, but in the drawings the most simple form of household filter is shown.

The filtering casing comprises a vertical cylinder 10, at the top of which is a head 11 slightly dome shaped, and to which is coupleda water inlet pipe 12. At the bottom of the casing is a discharge cock 13 through which the filtered water may pass.

Between the upper flange of the casing 10 and the bolting flange of the head 11 is secured a slightly dished partition 1 1 at the center of which is a depending boss 15 bored out from the bottom to form a bearing for filtering stone 17. To the base of the filtering stone is secured a hollow stem 19 that discharges into an enlarged chamber 19 leading to the discharge cock 13, and the water after passing through the stone flows through this hollow stem toward the point of discharge.

At the upper end of the hollow stem 19 is secured a recessed disk 20 forming one half of a ball race, the opposite half of which is formed in a cupped disk 21 that is secured to the lower portion of the cylinder, and in the ball race are arranged bearing balls 22, so that the cylindrical filtering stone may rotate without unnecessary friction.

Secured to the spindle 16 is a turbine disk 26 having vanes or buckets 27 against which the jets of water are directed from nozzles 28, these nozzles being carried by the partition 14; and opening at the top into the space between the partition and the cover 11, so that all of the water entering through the pipe 12 must pass through these nozzles 28 and be directed against the buckets or vanes of the turbine disk after which it passes into the filtering chamber 10 at a point outside the cylindrical filtering stone. The water thence passes through the stone and the hollow stem 19 to the point of discharge and during its passage will be cleared of impurities.

After the filter has been used a short time the outer surface of the stone will become coated with slime and other impurities removed from the water, and it becomes necessary to remove this coating. For this purpose a cleansing strip 30 is employed, this strip being preferably formed of carborundum or other suitable material. This cleansing strip is forced against the surface of the stone and as the latter is revolved the coating is removed and the surface will be thoroughly cleaned.

In order to clear the filtering chamber of the dirty water, a waste connection 31 having a suitable valve 32 is employed, so that the water may pass directly from the filtering chamber out through the waste pipe instead of being forced through the filter, and during this operation it is preferred to close the discharge cock 13 for the filtered water.

In carrying out the present invention, the cleaning strip 30 is secured at one end of a pivotally mounted plate 34 that preferably is of arcuate form in horizontal section in order to follow the contour of the stone, and the cylindrical filtering chamber. At one side of this plate is arranged a pair of arms 85, carrying and rigidly secured to a pivot pin 36, the upper and lower ends of which pass through guiding openings formed in vertically alined lugs 37 that project from the inner wall of the casing 10, so that the plate may swing freely with the pin 36 as a center of movement in order to bring the cleansing strip 30 into contact with the filtering stone.

In order to permit the free entrance of water adjacent to the cleansing strip, the plate provided with suitable openings '10.

Projecting from the top of the plate 31 is a finger 4-1. having at its upper end an outwardly turned lug 42 that is arranged to engage a cam plate 43 that is secured to the inner wall of the casing 10, the cam plate in the present instance having its surface inclined approximately at an angle of fiftyfive degrees. The plate and strip tend to de scend by gravity and in moving down the lug 42 will ride against the cam 13, and in so doing the plate will naturally be turned with the pin 36 as a center of movement, so that the cleansing strip will be forced into contact with the periphery of the filtering stone, and the degree of pressure exercised upon the strip will be practically constant. The force with which the strip is moved into contact with the stone depends upon the weight of the plate and the strip, and the angle of the cam 43, and the correct pressure having been previously determined by experiment the weight of the plate and the angle of the cam are permanently fixed.

As the filtering stone wears away, the plate will descend and in order to prevent uneven wear at the top of the stone, the strip is made of such length as to extend above the top and below the bottom of the stone, the initial extension above the top of the stone being such that the whole of the surface of the stone will be acted upon no matter how small its diameter may become.

The filtering stones are not entirely homogeneous, some parts being harder than others, and if the pressure always remains constant, the soft places will wear faster than the hard ones, and the stone will become uneven and out. of shape and in such condition that it could not be cleaned.

It is to be observed that the present device is so constructed that the moment one portion of the filtering stone becomes higher than another, it is necessary for the cleansing strip to move back as the higher portion passes thereuntler, and as the plate cannot be pushed back without increasing the pressure at the point where the lug 42 rests on the cam 43, this increase in pressure is exercised in forcing the cleaning strip against the higher portion of the cylinder with greater force and the higher and harder portion is thus removed and the stone kept symmetrical.

In the modified construction shown in Fig. 5,11 finger ll is secured to the bottom of the plate 3 1 and rests on an inclinedv cam 13 secured at the bottom of the filtering chamber, the result being the same as previously described.

In order to prevent accidental removal of the cleaning strip and plate and to prevent shaking of the same during handling and transportation, means are employed for locking the plate in place.

Depending from one of the arms or'lugs 35 is a pair of spaced strips 47 48, the strip 48 nearest the pivot pin terminating-short of the lower end of the strip 47. iThese strips are spaced to form a slot for the reception of the headed end of a screw 49 that passes through a small stuffing box 50 in the wall of the filtering chamber, and is provided with a knurled or milled operating knob 51. By turning the knob in one .direction the screw may be drawn outward until the head en -ages against the inner faces of the strips 4 and 48 pulls the plate 34 outward from the filtering stone, and locks it firmly against the inner wall of the filtering chamber, and this is the normal position of the cleansing strip during transportation and during the use of the filter. It is only when the strip is needed for cleaning purposes that the screw is turned in the-opposite direction in order to allow the strip to bear against the surface of the stone.

Secured to the pivot pin 36 is one end of a flexible strip 52, the upper end of the strip being free and normally forming a stop which by engagement with the uppermost lug 37 will prevent the withdrawal of the plate from the casing. By bending this strip outward the plate may be drawn up until the lower end of the pivot pin is unseated from the lowermost lug 37 and the strips 47 and 48 are free from the screw 50, and then by pushing the plate down the upper end of the pivot pin 36 may be free from the upper lug 37 and the plate and cleaning strip removed.

The construction of the mounting of the cleaner may be modified in a variety of ways, one of the modified structures being shown in Fig. 6. In this case the upper and lower arms 35 are connected by a strip 48 and one of the edges of this strip is en gaged by a flat headed screw 60 the screw being left handed and being adapted to an opening formed in a screw 51 to the left or anti-clock-wise that extends through the stuffing box previously described.

It will be observed that in turning the screw for the purpose of pulling the cleanser away from the filtering cylinder, the large flat end of the smaller screw 60 engages the inner wall of the strip 48 and as the movement of that side of the screw which comes in contact with the edge of the strip 48 is upward, the tendency is to lift the cleanser from the inclined cam, thus preventing binding. The smaller screw 60 being threaded left handed can never unscrew without pulling the head against the strip.

In the construction shown in Fig. 8, the cleaner is provided with an auxiliary weight 61 in order to afford suflicient pressure on inder.

.to produce greater inertia in which case The cleanser works more slowly on the inclined cam, and this is found to be advantageous in the larger sizes of filters.

It will be observed that in the structure shown in Fig. 8, the cam 43 is arranged adjacent the center of the cleanser and the latter is provided with a finger 42 for en gagement with said cam.

I claim 1. In filtering apparatus a revoluble cylindrical filtering member, a slidable gravity-operated cleansing strip therefor, and

means for deflecting said strip into contact with the filtering member, said member and means cooperating to support the strip.

2. In filtering apparatus, a revoluble cylindrical filtering member, a movable cleansing strip therefor, and immovable means in the path of said strip, said means and strip cooperating for maintaining constant unvarying pressure between the strip and said member.

3. In filtering apparatus, a filtering chamber, a revoluble cylindrical filtering member therefor, a movable cleaning member arranged to. engage the filtering member, and means separate from and in the path of said member and cooperating therewith for auto maticallyimaintaining uniform pressure between the two members and compensating for wear on said members.

*4. In filtering apparatus a filtering cha1nber, a revoluble cylindrical filtering member arranged therein, a movable cleaning and grinding member arranged to engage the filtering member, and means separate from and in the path of said movable member and cooperating therewith for automatically maintaining the filtering and cleaning and grinding members in engagement with constant unvarying pressure, said means compensating for wearing away of such members.

5. In filtering apparatus, a filtering chamber, a revoluble cylindrical filtering member therein, a cleansing strip, a pivotally and slidably mounted support therefor, a fixed deflecting device, and means carried by the support and cooperating with said deflecting device for urging the strip under practically uniform stress in the direction of the filtering member.

6. In filtering apparatus, a filtering chamber, a revoluble cylindrical filtering member therein, a cleaning strip, a pivotally mounted support for said strip, the support tending to move downward by gravity, and a cam for directing the support toward said filterin member.

I. In filtering apparatus, a filtering chamber, a revoluble cylindrical filter therein, a cleansing strip, a pivotally mounted plate supporting the same, and a cam tending to revolve said plate and thus move the strip into engagement with said filtering member.

8. In filtering apparatus, a filtering chamber, a revoluble cylindrical filtering member therein, a cleansing strip, a pivotally mounted plate supporting said strip, and an inclined cam on which the weight of the plate and strip are imposed, said cam tending to revolve the plate and move the strip into engagement with the filtering member.

9. In filtering apparatus, a filtering chamber, a revoluble cylindrical filtering member therein, a cleansing strip, a pivotally mounted plate carrying the same, a finger projecting from the plate, a lug extending from said finger, and an inclined cam with which said lug engages.

10. In filtering apparatus, a filtering chamber, a revoluble cylindrical filtering member therein, a cleansing strip, a plate carrying the same, a pivot pin secured to the plate, a pair of lugs projecting from the wall of the chamber and having openings for the recep tion of said pin, the latter being longitudinally and revolubly movable in said openings, and a cam tending to turn said plate and force the strip into engagement with said filtering member.

11. In filtering apparatus, a filtering chamber, a revoluble cylindrical filtering member therein, a cleansing strip, a plate carrying the same, a pivot pin rigid with the plate, a pair of projecting lugs having guiding openings for the reception of the pivot pin, a finger projecting from the plate, and a stationary cam with which said finger engages, substantially as specified.

12. In filtering apparatus, a filtering chamher, a revoluble cylindrical filtering member the deflecting means to move the support and the cleansing strip in the direction of the filtering member, and maintaining it by gravity with constant unvarying pressure against the filtering member, and means extending through the wall of said chamber for binding the support against the wall.

13. In filtering apparatus, a filtering chamber, a revoluble, cylindrical filtering member therein, a cleansing strip, a pivotallv mounted plate carrying said strip, a. pair of spaced strips on the plate, a headed screw extending bet-ween said strips, an operating knob carrying the screw, and means tending to move the plate in the direction of the filtering member.

14:. In filtering apparatus, a filtering chamber, a revoluble cylint'lrical filtering member therein, a cleaning strip, apivotally mounted support for the strip, the support tending to move downward by gravity, means for directing the support toward said filtering member, and an auxiliary weight carried by said cleaning member and tending to hold the same in engagement with the filtering member.

In testimony that I claim the foregoing as my own, I have hereto atlixed my signature in the presence of two witnesses.

ANDREXV G. SNEAK.

lVitnesses IsRAnL T. Dnro, LYNDON lV. Lnwme.

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