US3202549A - Leak-resistant dry cells - Google Patents

Leak-resistant dry cells Download PDF

Info

Publication number
US3202549A
US3202549A US106768A US10676861A US3202549A US 3202549 A US3202549 A US 3202549A US 106768 A US106768 A US 106768A US 10676861 A US10676861 A US 10676861A US 3202549 A US3202549 A US 3202549A
Authority
US
United States
Prior art keywords
container
cell
leak
electrode
liquid
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
Application number
US106768A
Inventor
Lewis F Urry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Union Carbide Corp filed Critical Union Carbide Corp
Priority to US106763A priority Critical patent/US3115429A/en
Priority to US106768A priority patent/US3202549A/en
Priority to GB7216/62A priority patent/GB995545A/en
Priority to US176073A priority patent/US3211992A/en
Priority to DEK46026A priority patent/DE1254238B/en
Priority to FR889674A priority patent/FR1316388A/en
Priority to GB15424/62A priority patent/GB995445A/en
Priority to FR896055A priority patent/FR1320642A/en
Priority to CH513862A priority patent/CH385938A/en
Priority to DE19621421629 priority patent/DE1421629A1/en
Priority to US322158A priority patent/US3212935A/en
Application granted granted Critical
Publication of US3202549A publication Critical patent/US3202549A/en
Priority to MY196635A priority patent/MY6600035A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/04—Regulating voltage or current wherein the variable is ac
    • G05F3/06—Regulating voltage or current wherein the variable is ac using combinations of saturated and unsaturated inductive devices, e.g. combined with resonant circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/107—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/562—Terminals characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/04—Cells with aqueous electrolyte
    • H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
    • H01M6/08—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with cup-shaped electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell

Definitions

  • LeClanche dry cell used for flashlights, portable radios, phototlash and other devices has gone through an evolution of improvements during the past decade or more in an attempt by manufacturers to prevent leakage from the cell during and after its use. Dcspite the many proposals, however, that have been advanced, there still remains a need for a better leakresistant dry cell.
  • Another object is to provide such a construction which will prohibit the migration of liquid throughout the cell container of a leak-resistant dry cell.
  • the invention comprises the provision of thin shielding layers ot a plastic material adhered to the whole exterior surfaces and to the upper interior side walls and bottom of the container-electrode of a leak-resistant dry cell.
  • FIG. 1 is a vertical elevation partially in section of a leak-resistant dry cell embodying the invention
  • FIG. 2 is a greatly enlarged view of the encircled portion indicated at 2; in FIG. 1;
  • FIG. 3 is an enlarged detail view taken along the line 3-3 of FIG. 1;
  • FIG. 4 is an enlarged detail View taken along the line 44 of FIG. 1.
  • a dry cell of a conventional construction having a cupped container-anode ill of a consumable metal, for instance, zinc, containing therein 32%,549 Patented Aug. 24., 19%5 a carbon electrode 12 embedded within a depolarizer mix 14- and an immobilized electrolyte 16 suitably in the form of a conventional paste," has provided to the containeranode it) a thin shielding layer 13 as shown in FIG. 1. As best shown in enlarged detail in FIGS. 2 and 4, the shielding layer 15 is firmly adhered to the exterior bottom and side walls of the container-anode 1G.
  • the shielding layer 18 is also applied to the interior side walls of the container-anode It at its upper edges above the depolarizer mix 14 and to its interior bottom wall as best shown in enlarged detail in FIGS. 3 and 4.
  • the shielding layer L8 should be inert to materials in the cell and preferably is composed of a plastic material, for example, vinyl resin, low molecular weight polyethylene, acrylic resins, latex and cellulosic derivatives such as cellulose acetate. A lacquer made from cellulosic derivatives such as cellulose ethers may also be used with success.
  • the plastic material preferably should have good elastic properties, vinyl resin being an excellent example of such material for which reason it is generally preferred.
  • a displaceable inner seal consisting of a wax impregnated paper washer 20 and a soft seal 22 of asphalt, for example, preferably is positioned within the upper edges of the contamer-anode ill.
  • This type of seal serves to entrap liquid within the cell and, being yieldable, also serves to release pressure therein as gas is formed Within the cell.
  • a rigid, non-displaceable inner seal of the type disclosed and claimed in my copending application, Serial No. 106,760, filed concurrently herewith, may also be utilized in the construction of the dry cell shown in FIG. 1.
  • a preferred top closure for the cell comprises a flanged metal cap 24 fitted on top of the carbon electrode 12 and an insulating washer 26 carried by the metal cap 24 on which rests the inner peripheral edges of a metal washer 28.
  • the outer edges of the washer 28 are locked in engagement with a jacket 39.
  • This construction conveniently provides a venting path for the escape of gas from the cell, for example, from between the displaceable edges of the metal washer 2% and insulating Washer 26.
  • the jacket 3% is non-corrodible, it being composed of a fibrous material, for example, paper, and also has locked to it a metallic false bottom 32 which underlies and is in contact with a portion of the container-anode 10 which is left bare at its bottom exterior Wall.
  • this construct-ion prohibits an electrolytic or corrosion couple from being formed between the inner amalgamated and outer unamalgamated surfaces of the container-anode 1%, which 3 7 in such prior constructions has resulted in wasteful consumption of anode material and the harmful generation of gas within the cell container.
  • a further advantage derived from the invention is the additional protection atlorded the inner side and bottom walls of the container-anode 10 by the shielding layer 1-8.
  • a dry cell embodying the invention lends itself to manufacture in any of several ways. For example, it is conventional inthe manufacture of dry cells to make the container-anode :10 by extruding it from a calotte of zinc. This method formaking the containeranode ll) may be conveniently utilized for incorporating a the shielding layer 18.
  • the container-anode 10 maybe extruded together with a sheet or film f the plastic shielding material which is firmly adhered to it through the application of heat. This technique, however, can
  • a leak-resistant dry cell comprising a cupped container-electrode of a consumable metal having therein a depolarizer mix and electrolyte, the top surfaces of which are disposed below the top open endjof said containerelectrode, and having a thin shielding layer of a plastic material adhered to the exterior side walls and bottom thereof, and a jacket surrounding said cupped containerelectrode and having a top closure locked in liquid-tight engagement therewith, said top closure lacing disposed over the top open end of said container-electrode and dewhich said shielding layers are: composed of an acrylic ,30
  • Another technique which may also be utilized for manufactoring dry cells consists of spraying or painting the shielding layer 18 onto the container-anode 10 after it ismadef A number of dry cells embodying the invention have been made and tested tinder severe conditions of use.

Description

24, 1965 L. F. URRY 3,202,549
' LEAK-RESISTANT DRY CELLS Filed May 1. 1961 ER 5; E ES ZINC CUP [3 :ISHIELDING LAYER 32 INVENTOR.
LE WIS F. U R RY A T TOR/V5 Y United States Patent This invention relates to leak-resistant dry cells of the type having a closed container surrounding the cell proper.
The so-called LeClanche dry cell used for flashlights, portable radios, phototlash and other devices has gone through an evolution of improvements during the past decade or more in an attempt by manufacturers to prevent leakage from the cell during and after its use. Dcspite the many proposals, however, that have been advanced, there still remains a need for a better leakresistant dry cell.
One proposal that has been adopted commercially is to encase a conventional dry cell within a closed container comprising a non-metallic jacket, a false bottom and a metallic top closure. Dificulty has been encountered, however, in preventing the jacket, which has been made from a fibrous material, for example, paper, from being penetrated by liquid exudate which may escape from the cell, for example, in the event the container-electrode becomes perforated during use of the cell. Several proposals have been suggested for overcoming this difticulty by incorporating a liquid-proof barrier into the jacket. Such proposals, however, while protecting the jacket, still permitted liquid to escape from the cell and suffer from the disadvantage that the liquid is free to migrate throughout the cell container, eventually coming into contact with the top and bottom closures where leakage is most apt to occur. Another difiiculty rought about by this migration of liquid has been the possible interference with the proper venting of gas from the cell, resulting in the harmful build-up of pressure within the cell container. Still another dificulty encountered has been that the liquid often becomes a source for the generation of gas, for when it comes into contact between the containcr-elec trode and the bottom of the cell container, they being made from diiterent metals, an electrolytic couple is created which may cause gas to be generated. Various proposals have been advanced for overcoming these difiiculties, for example, by incorporating a seal between the container-electrode and jacket, but these suggestions have not entirely solved the problem and generally have increased the difliculty and cost of manufacturing the cells.
It is therefore the principal object of the invention to provide a construction for a leak-resistant dry cell which will more effectively prohibit leakage.
More specifically, another object is to provide such a construction which will prohibit the migration of liquid throughout the cell container of a leak-resistant dry cell.
Briefly, these and other objects are achieved by the invention which comprises the provision of thin shielding layers ot a plastic material adhered to the whole exterior surfaces and to the upper interior side walls and bottom of the container-electrode of a leak-resistant dry cell.
In the accompanying drawing:
FIG. 1 is a vertical elevation partially in section of a leak-resistant dry cell embodying the invention;
FIG. 2 is a greatly enlarged view of the encircled portion indicated at 2; in FIG. 1;
FIG. 3 is an enlarged detail view taken along the line 3-3 of FIG. 1; and
FIG. 4 is an enlarged detail View taken along the line 44 of FIG. 1.
Referring to the drawing, a dry cell of a conventional construction having a cupped container-anode ill of a consumable metal, for instance, zinc, containing therein 32%,549 Patented Aug. 24., 19%5 a carbon electrode 12 embedded within a depolarizer mix 14- and an immobilized electrolyte 16 suitably in the form of a conventional paste," has provided to the containeranode it) a thin shielding layer 13 as shown in FIG. 1. As best shown in enlarged detail in FIGS. 2 and 4, the shielding layer 15 is firmly adhered to the exterior bottom and side walls of the container-anode 1G. The shielding layer 18 is also applied to the interior side walls of the container-anode It at its upper edges above the depolarizer mix 14 and to its interior bottom wall as best shown in enlarged detail in FIGS. 3 and 4. The shielding layer L8 should be inert to materials in the cell and preferably is composed of a plastic material, for example, vinyl resin, low molecular weight polyethylene, acrylic resins, latex and cellulosic derivatives such as cellulose acetate. A lacquer made from cellulosic derivatives such as cellulose ethers may also be used with success. Also, the plastic material preferably should have good elastic properties, vinyl resin being an excellent example of such material for which reason it is generally preferred. A displaceable inner seal consisting of a wax impregnated paper washer 20 and a soft seal 22 of asphalt, for example, preferably is positioned within the upper edges of the contamer-anode ill. This type of seal serves to entrap liquid within the cell and, being yieldable, also serves to release pressure therein as gas is formed Within the cell. A rigid, non-displaceable inner seal of the type disclosed and claimed in my copending application, Serial No. 106,760, filed concurrently herewith, may also be utilized in the construction of the dry cell shown in FIG. 1.
A preferred top closure for the cell comprises a flanged metal cap 24 fitted on top of the carbon electrode 12 and an insulating washer 26 carried by the metal cap 24 on which rests the inner peripheral edges of a metal washer 28. The outer edges of the washer 28 are locked in engagement with a jacket 39. This construction conveniently provides a venting path for the escape of gas from the cell, for example, from between the displaceable edges of the metal washer 2% and insulating Washer 26. The jacket 3% is non-corrodible, it being composed of a fibrous material, for example, paper, and also has locked to it a metallic false bottom 32 which underlies and is in contact with a portion of the container-anode 10 which is left bare at its bottom exterior Wall.
Having described the construction of a dry cell incorporating the principles of the invention, the advantages made possible by the invention may now be clearly visualized. During or after use of the cell, and especially when the cell has been subjected to severe conditions of discharge, the container-anode 1d may become perforated, in which event liquid is prevented from escaping from the cell and from migrating throughout the cell container by the shielding layer *Iuii. Hence, the difficulties heretofore brought about :by migration of liquid to the top and bottom closures, for example, interference with proper gas venting from the cell, are effectively eliminated. By this construction, it will also :be noted that the use of a liquid-proof barrier heretofore incorporated into the jacket is dispensed with, thereby reducing the cost of manufacturing the cell, since the liquid cannot penetrate the jacket, and the full dry strength of the jacket 3%} utilized in order to resist the build-up of gas pressure within the cell c011- tainer which may develop during operation of the cell.
An important advantage achieved by the invention is made possible by the fact that the shielding layer 18, in the event of perforation of the container-anode d0, prevents liquid from coming into contact with its outer sur 1=aces at least during the useful life of the cell. In contrast with prior dry cell constructions, this construct-ion prohibits an electrolytic or corrosion couple from being formed between the inner amalgamated and outer unamalgamated surfaces of the container-anode 1%, which 3 7 in such prior constructions has resulted in wasteful consumption of anode material and the harmful generation of gas within the cell container.
Also, a further advantage derived from the invention is the additional protection atlorded the inner side and bottom walls of the container-anode 10 by the shielding layer 1-8. In prior dry cell constructions, it has been appreciated thatthese portions of the container-electrode perform no useful purpose, other than to contain liquid within the cell, and in fact are detrimental, for the upper inner edges of the container-electrode, in particular, are
subject to being attacked and corroded during use of the cell. This results in escape of liquid from the containerelectrode,'the harmful generation of-gas and .the possibility of internal short-circuits occurring within the cell. This latter condition has been found to anise from the fact that, when corrosion occurs, anode metal tends to go into solution which eventually deposits over the depolarizer mix in the form of metallic itrees. These so-called so that practically all of the container-anode bottom is protected against corrosion.
The construction of a dry cell embodying the invention lends itself to manufacture in any of several ways. For example, it is conventional inthe manufacture of dry cells to make the container-anode :10 by extruding it from a calotte of zinc. This method formaking the containeranode ll) may be conveniently utilized for incorporating a the shielding layer 18. Thus, the container-anode 10 maybe extruded together with a sheet or film f the plastic shielding material which is firmly adhered to it through the application of heat. This technique, however, can
tests that dry cells of the invention released an amount of gas in a period of several months which equalled that released by cells of a conventional construction over a period of a day.
It will be understood that various changesand modifications may be made in the dry cell construction described herein without departing from the spirit and scope of the invention.
What is claimed is:
1. In a leak-resistant dry cell comprising a cupped container-electrode of a consumable metal having therein a depolarizer mix and electrolyte, the top surfaces of which are disposed below the top open endjof said containerelectrode, and having a thin shielding layer of a plastic material adhered to the exterior side walls and bottom thereof, and a jacket surrounding said cupped containerelectrode and having a top closure locked in liquid-tight engagement therewith, said top closure lacing disposed over the top open end of said container-electrode and dewhich said shielding layers are: composed of an acrylic ,30
resin.
'4. A leak-resistant dry cell as defined iby claim 1 in Which s-aid shielding layers are composed of latex.
5. A leak-resistantdry cell as defined by claim 1 in which-said shielding layers are-composed of a low molecbe used-only forapplying the shielding layer 118 to the exterior bottom and side walls of the container-anode 10. Another technique which may also be utilized for manufactoring dry cells consists of spraying or painting the shielding layer 18 onto the container-anode 10 after it ismadef A number of dry cells embodying the invention have been made and tested tinder severe conditions of use.
These tests demonstrated the elfectiveness of the inven' tion, for cells othenwise identical inconstructi-on but having no shielding layer applied to the container-electrode of the cell evidenced leakage while those. cells embodying the invention showed no evidence of leakage nor of mi ditional tests for determining the amount of gas released by them over a period of time. It was shown in these ular weight polyethylene.
A leak-resistant dry cell as defined by claim 1 in which said shielding layers are composed of a cellulosic material. a
' 7. Aleak-resistant dry cell as defined iby claim '6 in which said cellulosic material is cellulose acetate. 7
8. A leak-resistant dry cell as defined iby claim 6 in which said cellulosic material is a lacquer.
References Cited hy the Examiner UNITED STATES PATENTS 2,146,377 2/39 MacCallum; 2,198,423 4/40 Anthony; 136-132 2,283,379 5/42 MacCallum '136l31 2,5 9,159, 9/51 Gelardin. r 2,708,684 7 5/55 Grieve"; 136-132 x 2,773,920 12/56 Glover 136-l07 2,833,848 5/58 Marty 136182X 7 master: PATENTS 471,425 9/37 Great Britain.
H. MACK, Primary Examiner. 4 JOHN R. SPECK, Examiner.
to the interior bottom' of said

Claims (1)

1. IN A LEAK-RESISTANT DRY CELL COMPRISING A CUPPED CONTAINER-ELECTRODE OF A CONSUMABLE METAL HAVING THEREIN A DEPOLARIZER MIX AND ELECTROLYTE, THE TOP SURFACES OF WHICH ARE DISPOSED BLOW THE TOP OPEN END OF SAID CONTAINERELECTRODE, AND HAVING A THIN SHIELDING LAYER OF A PLASTIC MATERIAL ADHEREED TO THE EXTERIOR SIDE WALLS AND BOTTOM THEREOF, AND A JACKET SURROUNDING SAID CUPPED CONTAINERELECTRODE AND HAVING A TOP CLOSURE LOCKED IN LIQUID-TIGHT ENGAGEMENT THEREWITH, SAID TOP CLOSURE BEING DISPOSED OVER THE TOP OPEN END OF SAID CONTAINER-ELECTRODE AND DEFINING A FREE SPACE ABOVE SAID DEPOLARIZER MIX AND ELECTROLYTE; THE IMPROVEMENT WHICH COMPRISES THE PROVISION OF ADDITIONAL THIN SHIELDING LAYERS OF PLASTIC MATERIAL ADHERED TO THE INTERIOR SIDE WALLS ABOVE SAID DEPOLARIZER MIX WITHIN SAID FREE SPACE AND TO THE INTERIOR BOTTOM OF SAID CONTAINER-ELECTRODE.
US106768A 1961-03-10 1961-05-01 Leak-resistant dry cells Expired - Lifetime US3202549A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US106763A US3115429A (en) 1961-05-01 1961-05-01 Leak-resistant dry cell
US106768A US3202549A (en) 1961-05-01 1961-05-01 Leak-resistant dry cells
GB7216/62A GB995545A (en) 1961-03-10 1962-02-23 Three-phase voltage regulator
US176073A US3211992A (en) 1961-03-10 1962-02-27 Three-phase voltage regulators employing a saturable reactor and condenser in each phase
DEK46026A DE1254238B (en) 1961-05-01 1962-02-28 Three-phase voltage equalizer
FR889674A FR1316388A (en) 1961-05-01 1962-03-01 Three-phase voltage regulator
GB15424/62A GB995445A (en) 1961-05-01 1962-04-24 Improvements in and relating to cells
FR896055A FR1320642A (en) 1961-05-01 1962-04-28 Leak-free dry cell
CH513862A CH385938A (en) 1961-05-01 1962-04-30 Waterproof dry cell
DE19621421629 DE1421629A1 (en) 1961-05-01 1962-05-02 Leak-resistant dry cell
US322158A US3212935A (en) 1961-05-01 1963-11-07 Leak-resistant dry cell
MY196635A MY6600035A (en) 1961-05-01 1966-12-31 Improvements in and relating to cells

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US10676261A 1961-05-01 1961-05-01
US106763A US3115429A (en) 1961-05-01 1961-05-01 Leak-resistant dry cell
US106768A US3202549A (en) 1961-05-01 1961-05-01 Leak-resistant dry cells
US322158A US3212935A (en) 1961-05-01 1963-11-07 Leak-resistant dry cell

Publications (1)

Publication Number Publication Date
US3202549A true US3202549A (en) 1965-08-24

Family

ID=27493537

Family Applications (3)

Application Number Title Priority Date Filing Date
US106768A Expired - Lifetime US3202549A (en) 1961-03-10 1961-05-01 Leak-resistant dry cells
US106763A Expired - Lifetime US3115429A (en) 1961-03-10 1961-05-01 Leak-resistant dry cell
US322158A Expired - Lifetime US3212935A (en) 1961-03-10 1963-11-07 Leak-resistant dry cell

Family Applications After (2)

Application Number Title Priority Date Filing Date
US106763A Expired - Lifetime US3115429A (en) 1961-03-10 1961-05-01 Leak-resistant dry cell
US322158A Expired - Lifetime US3212935A (en) 1961-03-10 1963-11-07 Leak-resistant dry cell

Country Status (6)

Country Link
US (3) US3202549A (en)
CH (1) CH385938A (en)
DE (2) DE1254238B (en)
FR (2) FR1316388A (en)
GB (1) GB995445A (en)
MY (1) MY6600035A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3437530A (en) * 1967-02-24 1969-04-08 Esb Inc Leak-resistant dry cell

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3288650A (en) * 1961-05-01 1966-11-29 Union Carbide Corp Leak-resistant dry cell
US3881959A (en) * 1972-09-14 1975-05-06 Fuji Electrochemical Co Ltd Air cell
US4059717A (en) * 1976-10-26 1977-11-22 Esb Incorporated Battery having mask which electrochemically inactivates limited surface of metallic component
FI65688C (en) * 1981-04-27 1984-06-11 Sporax Oy CONTACT CONTROL FOR BATTERIES I ETT GALVANISKT BATTERI
DE3902648A1 (en) * 1989-01-30 1990-08-09 Varta Batterie GALVANIC ELEMENT
EP2341302A1 (en) * 2008-01-11 2011-07-06 Johnson Controls Technology Company Heat exchanger

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB471425A (en) * 1936-03-03 1937-09-03 Kurt Bruckmann Improvements in or relating cells for electric batteries
US2146377A (en) * 1933-04-28 1939-02-07 Alfred Henry Redfern Dry battery
US2198423A (en) * 1938-05-31 1940-04-23 Ray O Vac Co Leakproof dry cell
US2283379A (en) * 1935-09-09 1942-05-19 Maxolite Holdings Ltd Dry battery
US2569159A (en) * 1947-01-09 1951-09-25 Gelardin Benjamin Gas permeable coating for dry cell flashlight batteries
US2708684A (en) * 1953-12-03 1955-05-17 Burgess Battery Co Primary cell
US2773926A (en) * 1953-03-12 1956-12-11 Union Carbide Canada Ltd Dry cell
US2833848A (en) * 1955-03-23 1958-05-06 Marty Wilbert Henry Flat dry cell battery

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE600456C (en) * 1936-01-09 Telefunken Gmbh Arrangement for taking a practically constant voltage from an alternating current network with fluctuating voltage
US2644024A (en) * 1949-09-28 1953-06-30 Union Carbide & Carbon Corp Anode assembly for primary galvanic cell
NL86940C (en) * 1950-02-23
US2807658A (en) * 1954-07-09 1957-09-24 Union Carbide Corp Spiral-wound cathode for external cathode primary battery
US2830110A (en) * 1955-02-08 1958-04-08 Burgess Battery Co Primary cell and battery
US2900434A (en) * 1956-01-03 1959-08-18 Union Carbide Corp Corrosion inhibitors
US2859265A (en) * 1956-03-15 1958-11-04 Dow Chemical Co Primary cell
NL232109A (en) * 1957-10-09

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2146377A (en) * 1933-04-28 1939-02-07 Alfred Henry Redfern Dry battery
US2283379A (en) * 1935-09-09 1942-05-19 Maxolite Holdings Ltd Dry battery
GB471425A (en) * 1936-03-03 1937-09-03 Kurt Bruckmann Improvements in or relating cells for electric batteries
US2198423A (en) * 1938-05-31 1940-04-23 Ray O Vac Co Leakproof dry cell
US2569159A (en) * 1947-01-09 1951-09-25 Gelardin Benjamin Gas permeable coating for dry cell flashlight batteries
US2773926A (en) * 1953-03-12 1956-12-11 Union Carbide Canada Ltd Dry cell
US2708684A (en) * 1953-12-03 1955-05-17 Burgess Battery Co Primary cell
US2833848A (en) * 1955-03-23 1958-05-06 Marty Wilbert Henry Flat dry cell battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3437530A (en) * 1967-02-24 1969-04-08 Esb Inc Leak-resistant dry cell

Also Published As

Publication number Publication date
GB995445A (en) 1965-06-16
DE1421629A1 (en) 1968-12-12
FR1320642A (en) 1963-03-08
MY6600035A (en) 1966-12-31
DE1254238B (en) 1967-11-16
FR1316388A (en) 1963-01-25
US3212935A (en) 1965-10-19
US3115429A (en) 1963-12-24
CH385938A (en) 1964-12-31

Similar Documents

Publication Publication Date Title
US3802923A (en) Resealable vent closure for sealed galvanic dry cell
US3202549A (en) Leak-resistant dry cells
US3090824A (en) Leak-resistant dry cell
EP0138323A1 (en) Intumescent material-coated galavanic cells
US4529673A (en) Electrochemical cell having a safety vent closure
US2773926A (en) Dry cell
US3278339A (en) Primary dry cells
US3338750A (en) Leak-resistant dry cell
US2543106A (en) Deferred action primary battery
US3615860A (en) Dry cell construction having a one piece plastic closure
US3506495A (en) Primary dry cell
US3223557A (en) Leak-resistant dry cell
US2707200A (en) Leak-resistant dry cell
US2307763A (en) Dry cell battery
US3214298A (en) Leak-resistant dry cell
US3795545A (en) Leak-proof zinc chloride dry cell
US2822416A (en) Primary cell
US2231319A (en) Dry cell
US2859265A (en) Primary cell
US3184341A (en) Leak-resistant dry cell
US3179537A (en) Leak-resistant dry cell
CA1064105A (en) Primary dry cell with masked separator
US2592439A (en) Dry cell seal closure
US3115428A (en) Leak-resistant dry cell
US3288650A (en) Leak-resistant dry cell