US852487A - Feed-water heater and purifier. - Google Patents

Feed-water heater and purifier. Download PDF

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US852487A
US852487A US33085506A US1906330855A US852487A US 852487 A US852487 A US 852487A US 33085506 A US33085506 A US 33085506A US 1906330855 A US1906330855 A US 1906330855A US 852487 A US852487 A US 852487A
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water
trays
casing
ridges
steam
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US33085506A
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Gustavus H Zschech
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/153—Anti-leakage or anti-return valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/18—Heating or cooling the filters

Definitions

  • the main objects of this invention are to provide an improved form of feed water heater having improved means for distributing the water and bringing the steam into contact therewith; to provide an improved structure for feed water heaters in which a minimum number of steam and water-tight joints are required; to provide an improved form of filter in which the filtering material is secured in position by gravity without requiring nails, screws or spring clips and in which such filtering material may be quickly removed for the purpose of cleaning the same; and to provide an improved arrangement of parts which will permit of ready access to all spaces for the purpose of cleaning them without requiring the use of handholes.
  • Fig. 2 is a transverse section on the line 22 of Fig. 1.
  • Fig. 3 is a section of the lower part of the casing, cor responding to Fig. 1, and showing the method of securing the filtering fabric in position.
  • Fig. 4 is a transverse section on the line 4 1 of Fig. 3.
  • Fig. 5 is a detail of one of the frames which secure the filtering fabric in position.
  • Fig. 6 is an elevation of the tubular support for the inwardly extending arms of the clamp frames.
  • Fig. 7 is a top plan of the same.
  • Fig. 8 is a bottom plan of the same.
  • Fig. 9 is a top plan of the cover of the casing.
  • Fig. 10 is a top plan of a partition which separates the upper and lower parts of the casing.
  • Fig. 11 is a transverse section on the line 1111 of Fig. 10.
  • Fig. 12 is a detail showing the means of fastening the sheet of filtering
  • the outer casing 1 is cylindrical and stands upright on end.
  • the casing 1 is closed by a head at its upper part which preferably consists of a fixed portion 5 which contains the steam outlet 6 and a removable portion, or cover 7 which is bolted in position so as to be readily removable.
  • a central loop or eye 8 is provided for lifting the cover 7.
  • the lower end of the casing is secured to a base casting 9 which is preferably made in the form of an open trough 10 extending around the base of the casing and connected with the sewer by means'of a drain which is not shown in the drawings.
  • the casing 1 is subdivided into an upper heating and purifying compartment and a lower filtering compartment, by means of a horizontally disposed annular shelf or partition 12 which is open at its middle part to permit the upward passage of steam and the downward passage of water between the two compartments.
  • An inner annular wall or casing 13 is mounted on the shelf 12 and subdivides the upper compartment into two concentric chambers.
  • the casing 13 is of substantially the same height on all sides and terminate a short distance below the cover 7.
  • the upper end of the casing 13 is open and has secured thereto an inwardly extending flange 14 which is corrugated so as to provide a plurality of radially disposed channels for conducting water from the chamber 15 into the uppermost of the trays in the inner chamber 16.
  • a series of trays 17 and 18 which are arranged alternately and are respectively downwardly and upwardly converging. These trays are provided with annular dams 19 on their up per surfaces, and are arranged to spill into each other, the trays 17 discharging their contents near the middle of trays 18 and the trays 18 overflow near the outer edges into the trays 17. In this way the water flows alternately inwardly and outwardly.
  • the dams 19 check the flow of the water so that it slowly passes along the series of trays until it is finally discharged into the filtering compartment 20 of the heater.
  • Exhaust steam is admitted from an inlet pipe 21 and passes upwardly through the middle openings and around the edges of the trays 17 and 18 and spreads outward filling the spaces of the compartment 16.
  • the steam is deflected at the mouth of the pipe 21 by means of a bell 22. uncondensed after passing the trays is discharged at the outlet 6.
  • the trays 17 are provided with upwardly disposed rims 23 at their outer edges and the trays 18 are provided with downwardly disposed rims 2 1 which rest upon the trays 18 inward of the rims 23.
  • the lower edges of Any steam which is i the rims 24 are scalloped so as to provide openings through which the steam and water may flow.
  • the trays 17 are provided with upwardly disposed tubular rims 25 around their central openings. These are provided with vertical ridges 26 on their exterior. The outer edges of ridges 26 converge upwardly and the trays 17 are provided with central downwardly disposed rims 27 which are conical and fit around the outside of the ridges 26.
  • the ridges 26 and the rims 27 are suitably proportioned to support the rims 27 above the bottom of trays 18 to permit a free passage of the water and steam.
  • Each of the trays 17 and 18 is provided with an arch at its middle part to which is secured an eye bolt 28 by means of which the trays may be lifted out of the casing.
  • Water is supplied to the chamber 15 by a pipeconnected to the inlet opening 29 and said chamber is also provided with a valved blow-off connection 30 for the purpose of draining it when it is to be cleaned.
  • the lower part of the casing is also subdivided into two concentric compartments by an inner casing or annular wall 31.. The lower edges of the wall 31 are connected with the lower head 33 of the casing. This head is preferably located above the lower edge of the casing to allow room for the blow-off connection 34 fordrainingthe "chamber 20 and cleaning out any sediment which may have accumulated on the bottom thereof.
  • a valved blow-off connection 35 drains the outer chamber 36 of the filtering compartment.
  • the water outlet which connects with the boiler is indicated at 37 the pipe being omitted.
  • the wall 31 is provided with four outlet openings 38. These openings are screened, the screens being preferably formed by perforating a limited area of the wall 31. The perforated area is in each case surrounded by aridge 39. These ridges are formed of sheet metal pressed to shape as indicated in Fig. 12. A sheet of asbestos felt 40 is stretched across the crest of each of the ridges 39 and is held in position by means of a grating or frame 41. These frames are shaped to fit the crest and outer inclined surfaces of the ridges and are each provided with a loop 42 at the top, so that they may be suspended in proper position for engaging the ridges 39 by means of lugs 43 on the wall 31.
  • the frames 41 are provided with arched cross bars 44 and inwardly extending arms 45 which are pivotally connected to the cross bars 44 at a point opposite the middle of frame 41.
  • the arms 45 are bent upward so that their inner faces will form inclined surfaces, which are downwardly converging.
  • a spherical wedge or weight 47 is interposed'between the inner ends of the arms 45 and wedges said arms outwardly so as to force the frames 41 toward the ridges 39 and securely clamp the
  • a glass water gage 49 indicates the level of 4 the water within the casing 1 and an overflow pipe 50 drains ofi any water above the level of the over-flow opening 51.
  • flow pipe 50 is provided with a trap 52 which provides a water seal to prevent the escape of steam at the over-flow pipe.
  • the trap overflows into the trough 10 and may be entirely emptied by means of a pet cook 53 at its lower end. This provides for emptying the trap to prevent freezing when the boiler is shut down.
  • the shelf 12 is provided with inwardly extending arms 54 which support the lowest tray of the series.
  • Water is supplied at the opening 29 in quantities suited to the demands upon the boilers with which the apparatus is connected. This water fills the chamber 15 and overflows at the top of the wall 13 into the uppermost tray.
  • the water is guided inward by means of a corrugated flange 14 and also by a split extension or funnel 55 which rests on the uppermost tray 17 and separately removable to permit the ready withdrawal of the trays.
  • the steam and water connections are first closed by means of their respective valves, these valves not being shown in the drawings.
  • the cover 7 is then removed, and the trays 17 and 18 are lifted one at a time by means of their loops 28 and the sediment is scraped from the trays before they are replaced.
  • the walls of the cham ber 15 are cleaned by means of a small hose, the sediment being conducted away by means of the blow-off pipe 30.
  • a man hole 57 is provided to permit of con venient access to the filtering compartment.
  • the filtering screens may be readily removed by lifting out the weight 47 and then lifting out the frames 41 and removing the felt screens 40.
  • the felt screens 40 After the felt screens 40 have been cleaned, it is a simple matter to place them across their respective ridges and hang the frames 40 back into position over said ridges. Then the weight 47 is replaced, all of the frames 40 are forced tightly against the ridges 20 so as to securely hold and stretc the felt.
  • a device of the class described the combination of a casing having perforated walls, a partition formed of fabric stretched across the perforations in said wall and spaced away from said walls, a supporting ridge interposed between said fabric and walls, and a removable frame for securing said fabric upon said ridge.
  • a filter comprising a casing having an outlet opening in its walls, a screen extending across said opening, an inwardly extending ridge surrounding said screen, a sheet of fabric stretched across said ridge and spaced away from the screen, and a frame fitting along said ridge and normally urged toward the same for securing the fabric in position.
  • a filter comprising a casing having a perforated area in one of its walls, an inwardly extending ridge surrounding said per forated area, a fabric stretched across said ridge, and a weighted frame fitting said ridge and normally urged toward the same by gravity for securing the fabric upon said ridge.
  • a filter comprising a casing having a vertically disposed wall, an outlet opening in said wall, an inwardly extending ridge surrounding said opening, a sheet of filtering material stretched across said ridge, a frame fitting along said ridge and loosely suspended in position for securing the filtering material thereon, and a weighted arm normally urging said frame into contact with said ridge.
  • a filter comprising a casing having vertically disposed walls and having outlet openings at opposite sides of said walls, inwardly extending ridges surrounding said openings, sheets of fabric stretched over said ridges, individual frames fitting each of said ridges for clamping the fabric thereon said frame having inwardly extending parts, and a weight interposed between said parts and adapted to normally urge said frames toward their respective ridges.
  • a filter comprising a casing having vertically disposed walls and having outlet openings at opposite sides of said walls, inwardly extending ridges surrounding said openings, sheets of fabric stretched over said ridges, individual frames fitting each of said ridges for clamping the fabric thereon, said frames having inwardly extending parts, said parts being inclined away from each other, and a wedge interposed between said parts for forcing the frames toward their respective ridges.
  • a filter comprising a casing having vertically disposed walls and having outlet openings at opposite sides of said walls, inwardly extending ridges surrounding said openings, sheets of fabric stretched over said ridges, individual frames fitting each of said ridges for clamping the fabric thereon, individual arms pivotally connected to each of said frames and extending toward each other, said arms having downwardly converging surfaces at their inner ends, and a weight resting between said converging surfaces and adapted to wedge said arms outwardly for clamping said frames against said ridges.

Description

PATENTED MAY 7, 1907.
G.- 11280115011. FEED WATER HEATER AND PURIFIER.
APPLIQATION FILED AUG.16,1906.
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PATBNTED MAY '7, 19,01.
G. ZSGHECH. PEEDWATER HEATER AND PURIFIER.
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APPLIQATION FILED AUG.16,19D6.
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GUSTAVUS II. ZSCHECH, OF BERWVYN, ILLINOIS.
FEED-WATER HEATER AND PURIFIER.
Specification of Letters Patent.
Patented May 7, 1907.
Application filed August 16, 1906. Serial No. 330,855.
To all, whom, it may concern:
Be it known that I, GUSTAVUS H. ZSCHEGH, a citizen of the United States of America, and a resident of Berwyn, Illinois, have invented certain new and useful Improvements in Feed-l/Vater Heaters and Purifiers, of which the following is a specification.
The main objects of this invention are to provide an improved form of feed water heater having improved means for distributing the water and bringing the steam into contact therewith; to provide an improved structure for feed water heaters in which a minimum number of steam and water-tight joints are required; to provide an improved form of filter in which the filtering material is secured in position by gravity without requiring nails, screws or spring clips and in which such filtering material may be quickly removed for the purpose of cleaning the same; and to provide an improved arrangement of parts which will permit of ready access to all spaces for the purpose of cleaning them without requiring the use of handholes. These objects are accomplished by the device shown in the drawing in which Figure 1 is a vertical section of a feed water heater and purifier constructed according to this invention. Fig. 2 is a transverse section on the line 22 of Fig. 1. Fig. 3 is a section of the lower part of the casing, cor responding to Fig. 1, and showing the method of securing the filtering fabric in position. Fig. 4 is a transverse section on the line 4 1 of Fig. 3. Fig. 5 is a detail of one of the frames which secure the filtering fabric in position. Fig. 6 is an elevation of the tubular support for the inwardly extending arms of the clamp frames. Fig. 7 is a top plan of the same. Fig. 8 is a bottom plan of the same. Fig. 9 is a top plan of the cover of the casing. Fig. 10 is a top plan of a partition which separates the upper and lower parts of the casing. Fig. 11 is a transverse section on the line 1111 of Fig. 10. Fig. 12 is a detail showing the means of fastening the sheet of filtering fabric over the openings between the two chambers of the filtering compartment.
In the construction shown in the drawings, the outer casing 1 is cylindrical and stands upright on end. The casing 1 is closed by a head at its upper part which preferably consists of a fixed portion 5 which contains the steam outlet 6 and a removable portion, or cover 7 which is bolted in position so as to be readily removable. A central loop or eye 8 is provided for lifting the cover 7. The lower end of the casing is secured to a base casting 9 which is preferably made in the form of an open trough 10 extending around the base of the casing and connected with the sewer by means'of a drain which is not shown in the drawings.
The casing 1 is subdivided into an upper heating and purifying compartment and a lower filtering compartment, by means of a horizontally disposed annular shelf or partition 12 which is open at its middle part to permit the upward passage of steam and the downward passage of water between the two compartments. An inner annular wall or casing 13 is mounted on the shelf 12 and subdivides the upper compartment into two concentric chambers. The casing 13 is of substantially the same height on all sides and terminate a short distance below the cover 7. The upper end of the casing 13 is open and has secured thereto an inwardly extending flange 14 which is corrugated so as to provide a plurality of radially disposed channels for conducting water from the chamber 15 into the uppermost of the trays in the inner chamber 16. In the chamber 16 are mounted a series of trays 17 and 18 which are arranged alternately and are respectively downwardly and upwardly converging. These trays are provided with annular dams 19 on their up per surfaces, and are arranged to spill into each other, the trays 17 discharging their contents near the middle of trays 18 and the trays 18 overflow near the outer edges into the trays 17. In this way the water flows alternately inwardly and outwardly. The dams 19 check the flow of the water so that it slowly passes along the series of trays until it is finally discharged into the filtering compartment 20 of the heater.
Exhaust steam is admitted from an inlet pipe 21 and passes upwardly through the middle openings and around the edges of the trays 17 and 18 and spreads outward filling the spaces of the compartment 16. The steam is deflected at the mouth of the pipe 21 by means of a bell 22. uncondensed after passing the trays is discharged at the outlet 6.
The trays 17 are provided with upwardly disposed rims 23 at their outer edges and the trays 18 are provided with downwardly disposed rims 2 1 which rest upon the trays 18 inward of the rims 23. The lower edges of Any steam which is i the rims 24 are scalloped so as to provide openings through which the steam and water may flow. The trays 17 are provided with upwardly disposed tubular rims 25 around their central openings. These are provided with vertical ridges 26 on their exterior. The outer edges of ridges 26 converge upwardly and the trays 17 are provided with central downwardly disposed rims 27 which are conical and fit around the outside of the ridges 26. The ridges 26 and the rims 27 are suitably proportioned to support the rims 27 above the bottom of trays 18 to permit a free passage of the water and steam. Each of the trays 17 and 18 is provided with an arch at its middle part to which is secured an eye bolt 28 by means of which the trays may be lifted out of the casing.
Water is supplied to the chamber 15 by a pipeconnected to the inlet opening 29 and said chamber is also provided with a valved blow-off connection 30 for the purpose of draining it when it is to be cleaned. The lower part of the casing is also subdivided into two concentric compartments by an inner casing or annular wall 31.. The lower edges of the wall 31 are connected with the lower head 33 of the casing. This head is preferably located above the lower edge of the casing to allow room for the blow-off connection 34 fordrainingthe "chamber 20 and cleaning out any sediment which may have accumulated on the bottom thereof. A valved blow-off connection 35 drains the outer chamber 36 of the filtering compartment. The water outlet which connects with the boiler is indicated at 37 the pipe being omitted.
The wall 31 is provided with four outlet openings 38. These openings are screened, the screens being preferably formed by perforating a limited area of the wall 31. The perforated area is in each case surrounded by aridge 39. These ridges are formed of sheet metal pressed to shape as indicated in Fig. 12. A sheet of asbestos felt 40 is stretched across the crest of each of the ridges 39 and is held in position by means of a grating or frame 41. These frames are shaped to fit the crest and outer inclined surfaces of the ridges and are each provided with a loop 42 at the top, so that they may be suspended in proper position for engaging the ridges 39 by means of lugs 43 on the wall 31. The frames 41 are provided with arched cross bars 44 and inwardly extending arms 45 which are pivotally connected to the cross bars 44 at a point opposite the middle of frame 41.
The arms 45 are bent upward so that their inner faces will form inclined surfaces, which are downwardly converging. A spherical wedge or weight 47 is interposed'between the inner ends of the arms 45 and wedges said arms outwardly so as to force the frames 41 toward the ridges 39 and securely clamp the A glass water gage 49 indicates the level of 4 the water within the casing 1 and an overflow pipe 50 drains ofi any water above the level of the over-flow opening 51. flow pipe 50 is provided with a trap 52 which provides a water seal to prevent the escape of steam at the over-flow pipe. The trap overflows into the trough 10 and may be entirely emptied by means of a pet cook 53 at its lower end. This provides for emptying the trap to prevent freezing when the boiler is shut down. The shelf 12 is provided with inwardly extending arms 54 which support the lowest tray of the series.
The operation of the device shown is as follows: Water is supplied at the opening 29 in quantities suited to the demands upon the boilers with which the apparatus is connected. This water fills the chamber 15 and overflows at the top of the wall 13 into the uppermost tray. The water is guided inward by means of a corrugated flange 14 and also by a split extension or funnel 55 which rests on the uppermost tray 17 and separately removable to permit the ready withdrawal of the trays. As the water accumulates in the outer part of the tray 17 it overflows the dams 19 and passes down the inner wall of the rim 27 into the tray 18. The water then flows outward, being again impeded by dams 19 and runs over the rim 24 into the succeeding tray 17. In this manner the water passes along the entire series of trays un til it finally falls into the filtering chamber 20. Exhaust steam from the engine enters the casing through the pipe 21 and flows upwardly filling all of the spaces of the chamber 16. The steam passes up through the central openings in the trays and through the spaces between the brackets .54 in the shelf 12. In this manner the steam is brought into intimate contact with the water While such water is slowly passing over the trays and the water is raised to a temperature near the boiling point. This heating of the water while it slowlytrickles over the trays causes the foreign matter which is held in suspension to be precipitated. The precipitated particles are retained upon the trays by means of the dams 19. Any excess of steam which is not condensed by the water passes out of the exhaust opening 6. The condensed steam together with the heated and The overpurified water flows into the compartment 20 and is then filtered through the asbestos felt 40 and stored in the outer chamber 36 of the filtering compartment until it is drawn off at the outlet 37, as required by the boiler.
To clean the heater, the steam and water connections are first closed by means of their respective valves, these valves not being shown in the drawings. The cover 7 is then removed, and the trays 17 and 18 are lifted one at a time by means of their loops 28 and the sediment is scraped from the trays before they are replaced. The walls of the cham ber 15 are cleaned by means of a small hose, the sediment being conducted away by means of the blow-off pipe 30.
A man hole 57 is provided to permit of con venient access to the filtering compartment. After the water is drawn out of this compartment by means of the blow-off connections 34 and 35 the filtering screens may be readily removed by lifting out the weight 47 and then lifting out the frames 41 and removing the felt screens 40. After the felt screens 40 have been cleaned, it is a simple matter to place them across their respective ridges and hang the frames 40 back into position over said ridges. Then the weight 47 is replaced, all of the frames 40 are forced tightly against the ridges 20 so as to securely hold and stretc the felt.
that I claim as my invention and desire to secure by Letters Patent is:
1. In a device of the class described, the combination of a casing having perforated walls, a partition formed of fabric stretched across the perforations in said wall and spaced away from said walls, a supporting ridge interposed between said fabric and walls, and a removable frame for securing said fabric upon said ridge.
2. A filter comprising a casing having an outlet opening in its walls, a screen extending across said opening, an inwardly extending ridge surrounding said screen, a sheet of fabric stretched across said ridge and spaced away from the screen, and a frame fitting along said ridge and normally urged toward the same for securing the fabric in position.
3. A filter comprising a casing having a perforated area in one of its walls, an inwardly extending ridge surrounding said per forated area, a fabric stretched across said ridge, and a weighted frame fitting said ridge and normally urged toward the same by gravity for securing the fabric upon said ridge.
4-. A filter comprising a casing having a vertically disposed wall, an outlet opening in said wall, an inwardly extending ridge surrounding said opening, a sheet of filtering material stretched across said ridge, a frame fitting along said ridge and loosely suspended in position for securing the filtering material thereon, and a weighted arm normally urging said frame into contact with said ridge.
5. A filter comprising a casing having vertically disposed walls and having outlet openings at opposite sides of said walls, inwardly extending ridges surrounding said openings, sheets of fabric stretched over said ridges, individual frames fitting each of said ridges for clamping the fabric thereon said frame having inwardly extending parts, and a weight interposed between said parts and adapted to normally urge said frames toward their respective ridges.
6. A filter comprising a casing having vertically disposed walls and having outlet openings at opposite sides of said walls, inwardly extending ridges surrounding said openings, sheets of fabric stretched over said ridges, individual frames fitting each of said ridges for clamping the fabric thereon, said frames having inwardly extending parts, said parts being inclined away from each other, and a wedge interposed between said parts for forcing the frames toward their respective ridges.
7. A filter comprising a casing having vertically disposed walls and having outlet openings at opposite sides of said walls, inwardly extending ridges surrounding said openings, sheets of fabric stretched over said ridges, individual frames fitting each of said ridges for clamping the fabric thereon, individual arms pivotally connected to each of said frames and extending toward each other, said arms having downwardly converging surfaces at their inner ends, and a weight resting between said converging surfaces and adapted to wedge said arms outwardly for clamping said frames against said ridges.
Signed at Chicago this 9th day of August GUSTAVUS H. ZSCHECH.
Witnesses HARRY F. HAMLIN, EUGENE A. RUMMLER.
US33085506A 1906-08-16 1906-08-16 Feed-water heater and purifier. Expired - Lifetime US852487A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2666737A (en) * 1949-01-10 1954-01-19 Shell Dev Fractionating column with removable trays
US2702741A (en) * 1951-07-19 1955-02-22 Celanese Corp Tower reactor
US4341640A (en) * 1976-09-27 1982-07-27 Standard Oil Company Urea hydrolysis

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2666737A (en) * 1949-01-10 1954-01-19 Shell Dev Fractionating column with removable trays
US2702741A (en) * 1951-07-19 1955-02-22 Celanese Corp Tower reactor
US4341640A (en) * 1976-09-27 1982-07-27 Standard Oil Company Urea hydrolysis

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