US2556089A - Cathodic protection device - Google Patents
Cathodic protection device Download PDFInfo
- Publication number
- US2556089A US2556089A US31336A US3133648A US2556089A US 2556089 A US2556089 A US 2556089A US 31336 A US31336 A US 31336A US 3133648 A US3133648 A US 3133648A US 2556089 A US2556089 A US 2556089A
- Authority
- US
- United States
- Prior art keywords
- channel members
- tubular member
- rod
- flanges
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004210 cathodic protection Methods 0.000 title description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- 210000003414 extremity Anatomy 0.000 description 11
- 210000002445 nipple Anatomy 0.000 description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000000725 suspension Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000013175 Crataegus laevigata Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 210000001364 upper extremity Anatomy 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
Definitions
- ⁇ Our invention relates to cathodic protection devices, more particularly to devices intended to support a bar of magnesium or other anodic metal within a water tank, such as the tank of a hot Water heater, so that such bar of metal will waste away and prevent electrolytic action on the confronting walls of the tank.
- Figure 1 is a fragmentary sectional view of the intake end of a water tank showing its connections with a supply line and showing my cathodic protection device installed therein,Y
- Figure 2 is 'an enlarged sectional View through l2 2 of Figure 1 showing the manner in which my partsof the'device.
- Our cathodic protection device is particularly adapted for installation in 'a hot water tank T.
- Water tanks of this type are commonly provided with an internally threaded inlet in the head of the tank.
- Such inlet is adapted to receive a nipple N, which, in turn, is connected to a fitting, such as a collar C or T. This, in turn, is connected to a service pipe P.
- a fitting such as a collar C or T.
- Our device includes a pair of channel members l having flanges 2.
- Each channel member is provided with a central groove 3, which when the two channel members are placed back to back are complementary to form a tube extendingthe length of the channel members.
- the two channel members are spot welded together as indicatedl by 4 adjacent their central portions: so that the extremities of the channel members may be spread apart.
- the proportions of the channel members are such that before being spread apart they may slide freely within the nipple N.
- the upper extremities of the channel flanges 2 provided with small lugs 5 which overlie and rest upon the upper extremity ofthe nipple N. so as to limit movement of the device into the nipple.
- a rod 6 is loosely iitted within the central bore provided by the grooves 3.
- the lower exvtremity of the rod 6 is provided with a head 'l which receives a collar 8.
- the lower extremity of the collar 8 ⁇ is internally threaded to receive the correspondingly threaded upper end of a magnesium rod 9.
- the upper external surface of the collar 8 is tapered to form a wedge adapted to enter between the grooves 3.
- a corresponding tapered collar I0 is provided at the upper end of the rod 6.
- the collar I0 is engaged by a nut Il so that when the nut Il is tightened on the rod 6, the collars 8 and l0 are forced between the channel members l to spread their extremities.
- spot welds 4 serve principally to hold the assembly together prior to installation and that it is immaterial whether these welds hold or break when the channel members are spread apart.
- a cathodic protecting device adapted for installation in a tubular member, comprising: a pair of elongated channel members disposed back-to-back, the confronting portions of said channel members defining a central passage and the flanges of said channels defining with a surrounding tubular member parallel water courses; a rod extending through said passage and adapted to support-an anode element; a wedge member at at least one end of saidpassage; and
- a cathodic protecting device adapted for installation in a tubular member, comprising: a pair of elongated channel members disposed back-to-back, the confronting portions of said channel members denning a central passage and the flanges of said channels defining with a surrounding tubular member parallel water courses; means connecting said members at their central portions, whereby their extremities may be forced apart; a rod extending through said passage, and adapted to support an anode element; a wedge member at at least one end of said passage; and means for forcing said wedge into said passage to spread said channel members and force the extremities of said flanges into electrical contact with the surrounding walls of said tubular member.
- a cathode suspension device for electrical grounding contact with a tubular Vmember in communication with a tank, comprising: a pair of elongated channel members disposed back-toback and insertable into a tubular member and forming therewith parallel fluid courses; means for spreading said channel members to force the flange extremities thereof into the material of the surrounding tubular member for electrical contact therewith; and means for suspending an anoderod from said channel members.
- a cathode suspension device for electrical grounding contact with a tubular member in communication with a tank, comprising: a pair of elongated channel members disposed back-toback and insertable Yinto a tubular member and forming therewith parallel fluid courses; a tack weld at the centralY portions of said channel members; means for spreading said channel members to force the flange extremities thereof into the material of the surrounding tubular form a structure I-shaped member for electrical contact therewith; and means for suspending an anode rod from said channel members.
- a cathode suspension device for electrical grounding contact with a tubular member in communication with a tank, comprising: a pair of channel members disposed back-to-back and insertable into a tubular member, said elongated channel members having longitudinally extending marginal flanges and defining with said tubular member parallel water courses and the confronting portions of said channels defining a central bore; Wedge and tension rod means operable insaid bore to spread said channel members thereby to force said flanges into the material of the surrounding tubular member for electrical contact therewith; and means for suspending an anode rod from said channel members.
- a cathode suspension device for electrical grounding contact with a tubular member in communication with a tank, comprising: a pair of channel members disposed back-to-back and insertable into a tubular member, said elongated channel members having longitudinally extending marginal flanges and defining with said tubular member parallel water courses and the confronting portions of said channels defining a central bore; wedge and tension rod means operable in said bore to'spread said channel' members thereby to force said flanges into the material of the surrounding tubular member for electrical contact therewith; means forsuspending an anode rod from said channel members; and stop means at one end of said channel members engageable with the end of said tubular member tolimit movement of said channel members therein.
- a cathode suspension device forV electrical grounding Contact with a tubular member in communication with a tank comprising: a pair of elongated channel members disposed back-toback and insertable into a tubular member and forming therewith parallel fluid courses; means for spreading said channel members to force the flange extremities thereof into the material of the surrounding tubular ⁇ member for electrical contact therewith; means for suspending an anode rod from said channel members; and stop means at one endrof said channel members engageable with the end of said tubular member to limit movement of said channel members therein.
- a cathodic protecting device adapted for insertion in a tubular water conduit: a pair of elongated channel members disposed back-to-back to in cross-section adapted to t within a tubular waterV conduit with the extremities of the channel flanges in engagement with the walls thereof, and defining therewith parallel water passages; an anode element-means for suspending said element from said channel members; and means for spreading said channel members to force the extremities of said flanges into lighting contact with the walls of said conduit.
- a cathodic protecting device adapted for insertion in a tubular water conduit: a pair of elongated channel members having anges and a connecting/web, a groove extending alongrsaid web, whereby, when said channel members are placed back-to-back to form a structure I-shaped in cross-section a central bore is formed and whereby when said channel members are placed in a tubular-water conduit said channels bee therewith multiple water courses; a rod extending through said bore; an anode element sus- 5 t 6 pended from said rod; and wedge means on said NIT rod for spreading said channel members to force U ED STATES PATENTS the extremities of said flanges into lighting con- Numbel Name Date tact with said surrounding tubular Water conduit. 1,315,785 Lutz Sept. 9, 1919 EXTR MEIM 5 OTHER REFERENCES JAMES WLLACE: Transactions of The Electrochemical Society,
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
Description
Patented June 5, Y1951 CATHODIC PROTECTION DEVICE Evan L. James, Hawthorne, and Albert R. Duim and James Wallace, Inglewood, Calif., assignors to Mission Appliance Corporation, Hawthorne, Calif., a corporation of California Application June 5, 1948, Serial No. 31,336
9 Claims.
`Our invention relates to cathodic protection devices, more particularly to devices intended to support a bar of magnesium or other anodic metal within a water tank, such as the tank of a hot Water heater, so that such bar of metal will waste away and prevent electrolytic action on the confronting walls of the tank.
Included in the objects of our invention are:
First, to provide a device of this character which may be readily and quickly fitted within the intake nipple of a hot water storage tank and forced into positive, dependable and permanent electrical contact therewith.
Second, to provide a device of this character which insures proper electrical contact with a surrounding nipple even though the internal diameter of the nipple may vary substantially.
Third, to provide a device of this class which may be installed in or removed from the hot Water heater after manufacture is completed, or in the heater after or during service installation, without removing any part of the heater.
Fourth, to provide a device of this class which may be used in avertical or a horizontal position and is capable of withstanding substantial mechanical shock, such as incidental to handling of the heater, without damage.
Fifth, to provide a device of this character which does not appreciably interfere with the flow of Water into the water tank.
With the above and other objects in view, reference is directed to the accompanying drawings in which:
Figure 1 is a fragmentary sectional view of the intake end of a water tank showing its connections with a supply line and showing my cathodic protection device installed therein,Y
Figure 2 is 'an enlarged sectional View through l2 2 of Figure 1 showing the manner in which my partsof the'device.
u Our cathodic protection device is particularly adapted for installation in 'a hot water tank T.
Water tanks of this type are commonly provided with an internally threaded inlet in the head of the tank. Such inlet is adapted to receive a nipple N, which, in turn, is connected to a fitting, such as a collar C or T. This, in turn, is connected to a service pipe P. `Our device is designed to be anchored within the nipple N.
Our device includes a pair of channel members l having flanges 2. Each channel member is provided with a central groove 3, which when the two channel members are placed back to back are complementary to form a tube extendingthe length of the channel members. The two channel members are spot welded together as indicatedl by 4 adjacent their central portions: so that the extremities of the channel members may be spread apart. The proportions of the channel members are such that before being spread apart they may slide freely within the nipple N. The upper extremities of the channel flanges 2 provided with small lugs 5 which overlie and rest upon the upper extremity ofthe nipple N. so as to limit movement of the device into the nipple.
A rod 6 is loosely iitted within the central bore provided by the grooves 3. The lower exvtremity of the rod 6 is provided with a head 'l which receives a collar 8. The lower extremity of the collar 8`is internally threaded to receive the correspondingly threaded upper end of a magnesium rod 9. The upper external surface of the collar 8 is tapered to form a wedge adapted to enter between the grooves 3. A corresponding tapered collar I0 is provided at the upper end of the rod 6. The collar I0 is engaged by a nut Il so that when the nut Il is tightened on the rod 6, the collars 8 and l0 are forced between the channel members l to spread their extremities. This is done after the device, including the magnesium rod 9, is inserted through the nipple N. The wedging action of the collars 8 and'lil force the corners of the iiangesy 2 into the walls of the nipple N so as to provide positive electrical contact with a minimum of contact resistance.
In the event it is desired to remove the device. this may be done by loosening the nut il prying upwardly on the lugs 5. However, it is seldom necessary to remove the device, particularly if an adequate size of magnesium rod is employed. This is particularly true in instal." lations within hot water tanks for the reason that after several years of use; that isy during the period that the magnesium rod is present, the, interior walls of the tank will gradually lime up and the protecting Iinner shell of lime deposit will obviate the need of replacing the 3 magnesium rod when it has been dissipated. It will be observed from Figures 2 and 3 that the device offers a minimum interference with flow of water into the water tank.
It should be noted that the spot welds 4 serve principally to hold the assembly together prior to installation and that it is immaterial whether these welds hold or break when the channel members are spread apart.
It will be observed that both installation and removal may be accomplished without removing or'altering the heater in any manner. Also, although the device is shown as installed in a vertical position, it may be installed as readily in a horizontal position, inasmuch as the assembly is rigidly supported in its nipple and the magnesium rod is, by reason of the material comprising the rod, relatively light.
Many other embodiments of the invention may be resorted to without departing from the spirit of the invention.
We claim:
l.V A cathodic protecting device adapted for installation in a tubular member, comprising: a pair of elongated channel members disposed back-to-back, the confronting portions of said channel members defining a central passage and the flanges of said channels defining with a surrounding tubular member parallel water courses; a rod extending through said passage and adapted to support-an anode element; a wedge member at at least one end of saidpassage; and
means for forcing said wedge into said passage to spread said channel members and force the extremities of said flanges into electrical contact with the surrounding walls of said tubular member.V
2. A cathodic protecting device adapted for installation in a tubular member, comprising: a pair of elongated channel members disposed back-to-back, the confronting portions of said channel members denning a central passage and the flanges of said channels defining with a surrounding tubular member parallel water courses; means connecting said members at their central portions, whereby their extremities may be forced apart; a rod extending through said passage, and adapted to support an anode element; a wedge member at at least one end of said passage; and means for forcing said wedge into said passage to spread said channel members and force the extremities of said flanges into electrical contact with the surrounding walls of said tubular member.
3. A cathode suspension device for electrical grounding contact with a tubular Vmember in communication with a tank, comprising: a pair of elongated channel members disposed back-toback and insertable into a tubular member and forming therewith parallel fluid courses; means for spreading said channel members to force the flange extremities thereof into the material of the surrounding tubular member for electrical contact therewith; and means for suspending an anoderod from said channel members.
4. A cathode suspension device for electrical grounding contact with a tubular member in communication with a tank, comprising: a pair of elongated channel members disposed back-toback and insertable Yinto a tubular member and forming therewith parallel fluid courses; a tack weld at the centralY portions of said channel members; means for spreading said channel members to force the flange extremities thereof into the material of the surrounding tubular form a structure I-shaped member for electrical contact therewith; and means for suspending an anode rod from said channel members.
6. A cathode suspension device for electrical grounding contact with a tubular member in communication with a tank, comprising: a pair of channel members disposed back-to-back and insertable into a tubular member, said elongated channel members having longitudinally extending marginal flanges and defining with said tubular member parallel water courses and the confronting portions of said channels defining a central bore; wedge and tension rod means operable in said bore to'spread said channel' members thereby to force said flanges into the material of the surrounding tubular member for electrical contact therewith; means forsuspending an anode rod from said channel members; and stop means at one end of said channel members engageable with the end of said tubular member tolimit movement of said channel members therein.
'7. A cathode suspension device forV electrical grounding Contact with a tubular member in communication with a tank, comprising: a pair of elongated channel members disposed back-toback and insertable into a tubular member and forming therewith parallel fluid courses; means for spreading said channel members to force the flange extremities thereof into the material of the surrounding tubular` member for electrical contact therewith; means for suspending an anode rod from said channel members; and stop means at one endrof said channel members engageable with the end of said tubular member to limit movement of said channel members therein.
8. A cathodic protecting device adapted for insertion in a tubular water conduit: a pair of elongated channel members disposed back-to-back to in cross-section adapted to t within a tubular waterV conduit with the extremities of the channel flanges in engagement with the walls thereof, and defining therewith parallel water passages; an anode element-means for suspending said element from said channel members; and means for spreading said channel members to force the extremities of said flanges into lighting contact with the walls of said conduit. y
9. A cathodic protecting device adapted for insertion in a tubular water conduit: a pair of elongated channel members having anges and a connecting/web, a groove extending alongrsaid web, whereby, when said channel members are placed back-to-back to form a structure I-shaped in cross-section a central bore is formed and whereby when said channel members are placed in a tubular-water conduit said channels denne therewith multiple water courses; a rod extending through said bore; an anode element sus- 5 t 6 pended from said rod; and wedge means on said NIT rod for spreading said channel members to force U ED STATES PATENTS the extremities of said flanges into lighting con- Numbel Name Date tact with said surrounding tubular Water conduit. 1,315,785 Lutz Sept. 9, 1919 EXTR MEIM 5 OTHER REFERENCES JAMES WLLACE: Transactions of The Electrochemical Society,
vol. 90 (1946), pages 485, 486. REFERENCES CITED Y The following references are of record in the 10 le of this patent:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US31336A US2556089A (en) | 1948-06-05 | 1948-06-05 | Cathodic protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US31336A US2556089A (en) | 1948-06-05 | 1948-06-05 | Cathodic protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2556089A true US2556089A (en) | 1951-06-05 |
Family
ID=21858870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US31336A Expired - Lifetime US2556089A (en) | 1948-06-05 | 1948-06-05 | Cathodic protection device |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2556089A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2860781A (en) * | 1956-03-21 | 1958-11-18 | Hughes & Co | Cathodic protection of metal structures |
| US3813468A (en) * | 1972-06-14 | 1974-05-28 | Pickford Holland Co Ltd | Electrodes for glass furnaces |
| US5006214A (en) * | 1990-02-05 | 1991-04-09 | Burchnell Donald H | Cathodic protection apparatus |
| US20040099539A1 (en) * | 2002-11-27 | 2004-05-27 | Jim Yule | Corrosion-inhibited system and method for providing a utility service to a plurality of consumers |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1315785A (en) * | 1919-09-09 | Sylvania |
-
1948
- 1948-06-05 US US31336A patent/US2556089A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1315785A (en) * | 1919-09-09 | Sylvania |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2860781A (en) * | 1956-03-21 | 1958-11-18 | Hughes & Co | Cathodic protection of metal structures |
| US3813468A (en) * | 1972-06-14 | 1974-05-28 | Pickford Holland Co Ltd | Electrodes for glass furnaces |
| US5006214A (en) * | 1990-02-05 | 1991-04-09 | Burchnell Donald H | Cathodic protection apparatus |
| US20040099539A1 (en) * | 2002-11-27 | 2004-05-27 | Jim Yule | Corrosion-inhibited system and method for providing a utility service to a plurality of consumers |
| US6955746B2 (en) | 2002-11-27 | 2005-10-18 | Jim Yule | Corrosion-inhibited system and method for providing a utility service to a plurality of consumers |
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