CA1096000A - Internal disconnect electrical device - Google Patents
Internal disconnect electrical deviceInfo
- Publication number
- CA1096000A CA1096000A CA290,588A CA290588A CA1096000A CA 1096000 A CA1096000 A CA 1096000A CA 290588 A CA290588 A CA 290588A CA 1096000 A CA1096000 A CA 1096000A
- Authority
- CA
- Canada
- Prior art keywords
- terminal
- flexible member
- electrical device
- electrical
- connection
- 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
Links
- 238000009877 rendering Methods 0.000 claims abstract description 11
- 230000000717 retained effect Effects 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 21
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims description 2
- 239000000306 component Substances 0.000 abstract description 20
- 239000012530 fluid Substances 0.000 description 10
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 239000000123 paper Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000006267 biphenyl group Chemical group 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/14—Protection against electric or thermal overload
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
ELECTRICAL DEVICE
Abstract of the Disclosure An electrical device comprising a housing having a wall retaining at least one terminal. Within the housing is an electrical component with anode and cathode connections. An apertured, substan-tially non-flexible member is retained between the electrical compo-nent and the wall of the housing. A protrusion of the terminal ex-tends through an adjacent aperture in the non-flexible member. One of the connections is electrically coupled to the protrusion of the terminal. The connection has such a configuration in relation to the adjacent aperture of the non-flexible member whereby placement of the protrusion of the terminal relative to the non-flexible member causes the connection and the terminal to electrically uncouple rend-ering the electrical device inoperative.
Abstract of the Disclosure An electrical device comprising a housing having a wall retaining at least one terminal. Within the housing is an electrical component with anode and cathode connections. An apertured, substan-tially non-flexible member is retained between the electrical compo-nent and the wall of the housing. A protrusion of the terminal ex-tends through an adjacent aperture in the non-flexible member. One of the connections is electrically coupled to the protrusion of the terminal. The connection has such a configuration in relation to the adjacent aperture of the non-flexible member whereby placement of the protrusion of the terminal relative to the non-flexible member causes the connection and the terminal to electrically uncouple rend-ering the electrical device inoperative.
Description
~9~
The present invention relates to an electrical device with means for rendering the device e1ectrically inoperative upon the occur-rence of a predetermined condition, and~ more particularly, to means for rendering the device electrically inoperative upon the occurrence of predetermined movement by at least one of the components with respect to another component of the device.
The present invention is applicable to an electrical device which, under certain circumstances, is capable of generating or evolv-ing fluid during storage and/or operation. Usuallyj the evolution or generation of fluid up to a certain amount can be accommodated within the housing of the electrical device; however, accumulation of excess fluid within the housing rnay cause the appearance of a rupture : ir, a wall of the housing -through which fluid and, perhaps, o-ther mat-ter of the electrical device may be ejec:ted. Loss of fluicl and/or other matter of the electrical device through the rupture may have a harmFul effect on the desired operational characteristics of the device.
The ejection oF a Fluid -that is combustible From the electrical device is undesirable for obvious reasons. Furthermore, ejected fluid which contacts an adjacent electrical component may adverse1y : 20 react with the contacted component or may cause the contactèd com-ponent to operate intermittently.
U.S. patent 3,248,617 discloses nonbursting capacitor where-in electrically conductive tabs, projecting from a capacitor section and connected to the bottom of terminals, have such a length between a non-flexible member and the terminals such that progressive doming of a cover of the capacitor housing will be stopped short of bursting by separation of the tab along its length thereby rendering the capacitor : inoperative. As illustrated in Figure 4 oF U.S. patent 3,248,617, the method of separation of a tab tends to result in separated tab sections with sharply uneven edge surfaces in close proximity to each ._ _ _ ~ . ~ . . . .. . .__ . . . _ _. . __ _ . __ _. . .. ... _ . .... .
6~
; other. The uneven edge surfaces of the separated tab sections may come into electrical contact with each other thereby rendering the capacitor operative to generate or evolve additional fluid within the capacitor housing. The accumulation of additional fluid within the capacitor housing may result in a rupture appearing in the housing through which liquid may be ejected.
U.S. patent 3,377,510 discloses a circuit brea]cer ~; mechanism for a capacitor which avoids the possibility of electrical reconnection between parts of the disconnected electrical circuit. The circuit breaker disclosed in that patent includes a bridge member which flexes in the direction of a bulge in the capacitor housing until the stress of the flex exceeds the strength of the electrical connection between a tab projecting from the capacitor body and a terminal thereby breaking the connection. The bridge member then returns to its initial position to increase the gap separa-tlon between the terminal and the tab. The length time for the circuit breaker mechanism disclosed in U~S. patent 3,377,510 to react to the generation or evolution of fluid within the capacitor housing may be significant because of the required flexing of the bridge member prior to breaking the electrical connection between the terminal and the tab of the capacitor.
; The reaction time required to break the electrical connection between the terminal and the tab may be intolerable under some storage and/or operation conditions.
.
..
Accordingly, it is a feature of the present invention to provide means for electrically interrupting the circuit of an electrical device whereby chance contact is minimized between the connection to the electrical compo-nent and the terminal after separation of the connection and the terminal, and wherein there is less reaction time to separate the connection and the terminal than heretofore exhibited by a commercially available circuit breaker ; mechanism.
According to a further feature of the present invention, from a broad aspect, there is provided an electrical device comprising a housing having a wall retain-ing at least one terminal. An electrical component with at ~, least two connections is provided within the housing. An ; apertured non-flexible member is retained between the electrical component and the wall of the housing in spaced relationship to the connections. The terminal extends through an adjacent aperture in the non-flexible member in a direction toward the component. One of the connections is electrically , 20 coupled to the terminal at its end in spaced relation to the adjacent surface of the non-flexible member whereby displace-ment of the terminal relative to the non-flexible member, due to slight dooming of the wall, causes delayed engagement of the connection with the adjacent surface of the non-flexible member and upon engagement due to further dooming of the wall the connection and the terminal are electrically uncoupled rendering the electrical device inoperative.
The above and other features and advantages of the present invention will be made obvious - 2a ~ -096~
to those skilled in the art by the fo110wing description which con-sidered in relation to the accompanying drawing, of which:
FIGURE 1 is a side view, partly in section, of an electrical device showing the circuit breaker of the present invention;
FIGURE 2 is a side view, partly in section, of the electrical device of this invention wherein the connection and the terminal are electrically uncoupled rendering the electrical device inoperative;
FIGURE 3 is a side view of the non-flexible member shown in FIGURE 1 and FIGURE 2;
FIGURE 4 is a partial side view of a three terminal electri-cal device showing an embodiment of the circuit breaker of the present invention; and FIGURE 5 is a side view of the non-flexible member shown in FIGURE 4.
General~ly speaking, the present invention relates to an e1ectrical device comprising a housing having a wall retaining at least one terminal. Within the housing is an electrical componen-t with anode and cathode connectiolls. An aperlured, substantially non-flexible melnber is retained between the electrical component and a wall of the housing. A protrusion of the terminal extends through an adjacent aperture in the non-flexible member. One of the connections is electri-cally coupled to the protrusion of the terminal. The connection elec-trically coupled to the protrusion of the terminal has such a con-figuration in rela-tion to the adjacent aperture of the non-flexible melnber whereby displacement of the protrusion of the terminal relative to the non-flexible member causes the connection and the terminal to electrically uncouple rendering the electrical device inoperative.
Referring now to FIGURE 1 of the drawing, an electrical device 10 includes a housing 11, terminal assemblies 12 and 13, an electrical conlponent 14, and a li~uid (not shown) in the housing and contac-ting the elec-trical component. The liquid may be a dielectric liquid such as dioctyl phthalate, or chlorinated diphenyl, or the like.
In the interest of disclosing the concepts of the present invention in its presently preferred embodinlent, the illustrated electrical :~ component 14 is a convolutely wound capacitor roll including anode and cathode metallic foils (not shown) with a dielectric cellulosic paper . separator (not shown) between and separating each of the metallic : foils. The metallic foils are of any suitable material such as aluminuln or the like. The cellulosic paper is any suitable paper such as Kraft paper. The paper is impregnated with dioctyl phthalate dielectric liquid with or without additives such as an epoxide.
The housing 11 includes wall or cover 16 which is retained in place ` by crimping or rolling area 17 of the cover over edge 18. The .; housing 11 including its cover 16 are fabricated From any suitable material such as.-aluminulll or -the like.
Terminal assembly 12 inclucles a rivet 19 having a shank 20 prt)~iectin~ througil aperture 21 in the cover lG. An external terminal end 22 is sui-tably attached to the shank 20. An electrically insulating washer 23 retains the rivet 19 spaced from electrical con-- 20 tact with the cover 16. The rivet 19 includes a protrusion 25 which will be discussed more fully hereinlater. Terminal assembly 13 is constructed in an analoguous manner to that of terminal assembly 14 and includes a rivet 26 projecting through aperture 27 in the cover 16, an external terminal end 28 suitably attached to the end of shank 29, an electrically insulating washer 30 retaining the rivet 26 in spaced relationship from electrical contact with cover 16, and a pro-trusion 32. Terminal assembly 12 and terminal assembly 31 are further retained in place by electrically insulating means 33.
An apertured, substantially non-flexible member 34 is adja-30 cent to the cover 16. ~rhe memoer 34 includes length and width dimen-6~ 0 sions tha-t approximate the corresponding dimensions of the cover 16.
The dimensions of the melnber 34 as well as the dimensions of the cover 16 may be -those associated with an oval or circle or rectangle or square or the like. As shown in FIGURE 1, the member 34 includes a peripherial reinforcing means or rib 35 which engages or contacts an area adjacent edge 18 of the housing 11. The rib 35 reinforces and thereby helps to render the menlber 34 non-flexible. FIGURE 3 of the drawing is a side view of the non-flexible menlber 34 illu-: strated in FIGURE 1 of the drawing. An appropriate network (not ;~ lo shown) of additional reinforcing means or ribs 35 may be formed in the member 34 and/or the member may be of suitable thickness so as to further help minimize any tendency of the member to flex in any di-rection. Member 3~ is fabricated from any suitable non-flexible and electrically insulating material such as glass reinforced poly-amide, or a phenolformaldehyde resin, or the like.
Again re-Ferring to FIGURE 1, apertures37 and 38 are formed in melllber 34. Each of the apertures 37 and 3~ hasa cross-sectional configuration that is slightly (Jreater than the cross-sectional configurat;on of the respective protrusions (either 25 or 32 as the case may be) of the respective terminal assemblies (either 12 or 13 as the case may be). Each of the protrusions projects through its respective aperture in menlber 34 and extends a very short distance beyond the member 34 in the direction toward the capacitor electri-cal component 14.
Anode connection 39, a metallic lead or tab strip suitably attached to and extending from the anode foil (not shown3 of the capa-citor electrical component 14, is bonded, such as by welding or the like, to the end of the protrusion 25 extending through the aperture 37 and slightly beyond the adjacen-t surface 41 of the non-flexible melnber 34. Cathode connection 40, a metallic lead or tab strip suitably attached to and extending from the ca-thode foil (not shown) of the 6~
capacitor electrical component 14, jc bonded, such as by welding or the like, to the end of the protrusion 32 extending through the aper-ture 38 and slightly beyond the adjacent surface 41 of the non-flexible member 34. As illustrated in FIGURE 1, the width configuration of each of the connections 39 and 40 is different than the cross-sectional configuration of the adjacent aperture formed in member 34 so that neither of the connections 39 and 40 is'able to freely move into its adjacent aperture. The difference illustrated in the several FIGURES
of the drawing is that the width of a tab strip 39 and 40 is greater than the cross-sectional configuration of its associated aperture 37 and 38.
Upon doming of the cover 16 due to the generation or evolu-tion of fluid within the housing 11, pro-trusion 25 or protrusion 32 or both are clisplaced re'lative to the non-flexible melllber 34 causing the anocle conrleGtion 39 and/or the cathode connection 40 to engage with adjacent surface 41 of the non-flexible menlber 34. Further clomillg of the cover 16 causes further disp'lacement of one or both o-f the protrusions 25 ancl 32 relative to the non-flexible menlber 34 and the connections 39 and 40. Such displacement of one or both of the protrusions 25 and 32 relative to the non-flexible member 34 and the ; connections 39 and 40 causes either one or both of the connections to electrical'ly ullcouple from its heretofore electrically associated protrusion thereby rendering the electrical device 10 inoperative.
FIGURE 2 of the drawing shows protrusions 25 and 32 electrically se-parated from the anode and cathode connections 39 and 40 respectively.
The electrically insulating, non-flexible member 34 is thereafter used to help avoid the possibllity of electrical reconnection between the protrusions 25 and/or 32 and anode and/or cathode connections 39 and 40 (as the case may be).
Referring now to FIGURE 4 of the drawing, a three terminal .
~96~
electrical device 50 is shown. The three terminal electrical device 50 includes a housing 11~ terminal assemblies 12, 13 and 51, two elec-trical components (not shown) having an electrically common cathode connection 40 and anode connections 39 and 52, and a dielectric li-quid (not shown) in the housing and contacting each of the electrical .; components. Each of the electrical components (not shownj may be a -. convolutely wound capacitor roll of the type described hereinbefore in the discussion of FIGURE 1.
Each of the terminal assemblies 12, 13 and 51 is constructed in an analoguous manner and as described in the description of terminal assemblies 12 and 13 shown in FIGURES 1 and 2.
- The non-flexible member 34 of FIGURES 4 and 5 of the draw-in~ includes an appropriate network of rein-forcing means or ribs 35 formed therein so as to further help minilllize any tendency of the member to flex in any direction. In adclition to apertures 37 ancl 38, the member 34, as shown in FIGURES 4 and 5, includes a third aperture 53 to accomlllodate protrusion 54 of terminal assembly 51. Anode connection 52 is bonded to the encl of protrusion 54 extending throuyh aperture 53.
Electrically insulating washer 55 retains the terminal assembly 51 in spaced relationship from electrical contact with cover 16.
: Upon doming the cover 16, protrusion 25 or protrusion 32 or protrusion 54 or any two protrusions or all protrusions are dis-placed relative to the non-flexible !nember causing the anode connec-tion 39 and/or the cathode connection 40 and/or the anode connection 52 to engage with adjacent surFace 41 of the non-flexible member 34.
Further doming of the wall or cover 16 causes further displacement of -: one or more of the protrusions relative -to the non-flexible member and the connections 39, 40 and 52. Such displacement of one or more of the protrusions 25, 32 and 54 relative to the non-flexible member 34 and the connections 39, 40 and 52 causes one or more of the connec-,~ ,, ~ .~9~
tions to electrically uncouple from its heretofore electrically associated protrusion in the manner as discussed in FIGURES 1 and
The present invention relates to an electrical device with means for rendering the device e1ectrically inoperative upon the occur-rence of a predetermined condition, and~ more particularly, to means for rendering the device electrically inoperative upon the occurrence of predetermined movement by at least one of the components with respect to another component of the device.
The present invention is applicable to an electrical device which, under certain circumstances, is capable of generating or evolv-ing fluid during storage and/or operation. Usuallyj the evolution or generation of fluid up to a certain amount can be accommodated within the housing of the electrical device; however, accumulation of excess fluid within the housing rnay cause the appearance of a rupture : ir, a wall of the housing -through which fluid and, perhaps, o-ther mat-ter of the electrical device may be ejec:ted. Loss of fluicl and/or other matter of the electrical device through the rupture may have a harmFul effect on the desired operational characteristics of the device.
The ejection oF a Fluid -that is combustible From the electrical device is undesirable for obvious reasons. Furthermore, ejected fluid which contacts an adjacent electrical component may adverse1y : 20 react with the contacted component or may cause the contactèd com-ponent to operate intermittently.
U.S. patent 3,248,617 discloses nonbursting capacitor where-in electrically conductive tabs, projecting from a capacitor section and connected to the bottom of terminals, have such a length between a non-flexible member and the terminals such that progressive doming of a cover of the capacitor housing will be stopped short of bursting by separation of the tab along its length thereby rendering the capacitor : inoperative. As illustrated in Figure 4 oF U.S. patent 3,248,617, the method of separation of a tab tends to result in separated tab sections with sharply uneven edge surfaces in close proximity to each ._ _ _ ~ . ~ . . . .. . .__ . . . _ _. . __ _ . __ _. . .. ... _ . .... .
6~
; other. The uneven edge surfaces of the separated tab sections may come into electrical contact with each other thereby rendering the capacitor operative to generate or evolve additional fluid within the capacitor housing. The accumulation of additional fluid within the capacitor housing may result in a rupture appearing in the housing through which liquid may be ejected.
U.S. patent 3,377,510 discloses a circuit brea]cer ~; mechanism for a capacitor which avoids the possibility of electrical reconnection between parts of the disconnected electrical circuit. The circuit breaker disclosed in that patent includes a bridge member which flexes in the direction of a bulge in the capacitor housing until the stress of the flex exceeds the strength of the electrical connection between a tab projecting from the capacitor body and a terminal thereby breaking the connection. The bridge member then returns to its initial position to increase the gap separa-tlon between the terminal and the tab. The length time for the circuit breaker mechanism disclosed in U~S. patent 3,377,510 to react to the generation or evolution of fluid within the capacitor housing may be significant because of the required flexing of the bridge member prior to breaking the electrical connection between the terminal and the tab of the capacitor.
; The reaction time required to break the electrical connection between the terminal and the tab may be intolerable under some storage and/or operation conditions.
.
..
Accordingly, it is a feature of the present invention to provide means for electrically interrupting the circuit of an electrical device whereby chance contact is minimized between the connection to the electrical compo-nent and the terminal after separation of the connection and the terminal, and wherein there is less reaction time to separate the connection and the terminal than heretofore exhibited by a commercially available circuit breaker ; mechanism.
According to a further feature of the present invention, from a broad aspect, there is provided an electrical device comprising a housing having a wall retain-ing at least one terminal. An electrical component with at ~, least two connections is provided within the housing. An ; apertured non-flexible member is retained between the electrical component and the wall of the housing in spaced relationship to the connections. The terminal extends through an adjacent aperture in the non-flexible member in a direction toward the component. One of the connections is electrically , 20 coupled to the terminal at its end in spaced relation to the adjacent surface of the non-flexible member whereby displace-ment of the terminal relative to the non-flexible member, due to slight dooming of the wall, causes delayed engagement of the connection with the adjacent surface of the non-flexible member and upon engagement due to further dooming of the wall the connection and the terminal are electrically uncoupled rendering the electrical device inoperative.
The above and other features and advantages of the present invention will be made obvious - 2a ~ -096~
to those skilled in the art by the fo110wing description which con-sidered in relation to the accompanying drawing, of which:
FIGURE 1 is a side view, partly in section, of an electrical device showing the circuit breaker of the present invention;
FIGURE 2 is a side view, partly in section, of the electrical device of this invention wherein the connection and the terminal are electrically uncoupled rendering the electrical device inoperative;
FIGURE 3 is a side view of the non-flexible member shown in FIGURE 1 and FIGURE 2;
FIGURE 4 is a partial side view of a three terminal electri-cal device showing an embodiment of the circuit breaker of the present invention; and FIGURE 5 is a side view of the non-flexible member shown in FIGURE 4.
General~ly speaking, the present invention relates to an e1ectrical device comprising a housing having a wall retaining at least one terminal. Within the housing is an electrical componen-t with anode and cathode connectiolls. An aperlured, substantially non-flexible melnber is retained between the electrical component and a wall of the housing. A protrusion of the terminal extends through an adjacent aperture in the non-flexible member. One of the connections is electri-cally coupled to the protrusion of the terminal. The connection elec-trically coupled to the protrusion of the terminal has such a con-figuration in rela-tion to the adjacent aperture of the non-flexible melnber whereby displacement of the protrusion of the terminal relative to the non-flexible member causes the connection and the terminal to electrically uncouple rendering the electrical device inoperative.
Referring now to FIGURE 1 of the drawing, an electrical device 10 includes a housing 11, terminal assemblies 12 and 13, an electrical conlponent 14, and a li~uid (not shown) in the housing and contac-ting the elec-trical component. The liquid may be a dielectric liquid such as dioctyl phthalate, or chlorinated diphenyl, or the like.
In the interest of disclosing the concepts of the present invention in its presently preferred embodinlent, the illustrated electrical :~ component 14 is a convolutely wound capacitor roll including anode and cathode metallic foils (not shown) with a dielectric cellulosic paper . separator (not shown) between and separating each of the metallic : foils. The metallic foils are of any suitable material such as aluminuln or the like. The cellulosic paper is any suitable paper such as Kraft paper. The paper is impregnated with dioctyl phthalate dielectric liquid with or without additives such as an epoxide.
The housing 11 includes wall or cover 16 which is retained in place ` by crimping or rolling area 17 of the cover over edge 18. The .; housing 11 including its cover 16 are fabricated From any suitable material such as.-aluminulll or -the like.
Terminal assembly 12 inclucles a rivet 19 having a shank 20 prt)~iectin~ througil aperture 21 in the cover lG. An external terminal end 22 is sui-tably attached to the shank 20. An electrically insulating washer 23 retains the rivet 19 spaced from electrical con-- 20 tact with the cover 16. The rivet 19 includes a protrusion 25 which will be discussed more fully hereinlater. Terminal assembly 13 is constructed in an analoguous manner to that of terminal assembly 14 and includes a rivet 26 projecting through aperture 27 in the cover 16, an external terminal end 28 suitably attached to the end of shank 29, an electrically insulating washer 30 retaining the rivet 26 in spaced relationship from electrical contact with cover 16, and a pro-trusion 32. Terminal assembly 12 and terminal assembly 31 are further retained in place by electrically insulating means 33.
An apertured, substantially non-flexible member 34 is adja-30 cent to the cover 16. ~rhe memoer 34 includes length and width dimen-6~ 0 sions tha-t approximate the corresponding dimensions of the cover 16.
The dimensions of the melnber 34 as well as the dimensions of the cover 16 may be -those associated with an oval or circle or rectangle or square or the like. As shown in FIGURE 1, the member 34 includes a peripherial reinforcing means or rib 35 which engages or contacts an area adjacent edge 18 of the housing 11. The rib 35 reinforces and thereby helps to render the menlber 34 non-flexible. FIGURE 3 of the drawing is a side view of the non-flexible menlber 34 illu-: strated in FIGURE 1 of the drawing. An appropriate network (not ;~ lo shown) of additional reinforcing means or ribs 35 may be formed in the member 34 and/or the member may be of suitable thickness so as to further help minimize any tendency of the member to flex in any di-rection. Member 3~ is fabricated from any suitable non-flexible and electrically insulating material such as glass reinforced poly-amide, or a phenolformaldehyde resin, or the like.
Again re-Ferring to FIGURE 1, apertures37 and 38 are formed in melllber 34. Each of the apertures 37 and 3~ hasa cross-sectional configuration that is slightly (Jreater than the cross-sectional configurat;on of the respective protrusions (either 25 or 32 as the case may be) of the respective terminal assemblies (either 12 or 13 as the case may be). Each of the protrusions projects through its respective aperture in menlber 34 and extends a very short distance beyond the member 34 in the direction toward the capacitor electri-cal component 14.
Anode connection 39, a metallic lead or tab strip suitably attached to and extending from the anode foil (not shown3 of the capa-citor electrical component 14, is bonded, such as by welding or the like, to the end of the protrusion 25 extending through the aperture 37 and slightly beyond the adjacen-t surface 41 of the non-flexible melnber 34. Cathode connection 40, a metallic lead or tab strip suitably attached to and extending from the ca-thode foil (not shown) of the 6~
capacitor electrical component 14, jc bonded, such as by welding or the like, to the end of the protrusion 32 extending through the aper-ture 38 and slightly beyond the adjacent surface 41 of the non-flexible member 34. As illustrated in FIGURE 1, the width configuration of each of the connections 39 and 40 is different than the cross-sectional configuration of the adjacent aperture formed in member 34 so that neither of the connections 39 and 40 is'able to freely move into its adjacent aperture. The difference illustrated in the several FIGURES
of the drawing is that the width of a tab strip 39 and 40 is greater than the cross-sectional configuration of its associated aperture 37 and 38.
Upon doming of the cover 16 due to the generation or evolu-tion of fluid within the housing 11, pro-trusion 25 or protrusion 32 or both are clisplaced re'lative to the non-flexible melllber 34 causing the anocle conrleGtion 39 and/or the cathode connection 40 to engage with adjacent surface 41 of the non-flexible menlber 34. Further clomillg of the cover 16 causes further disp'lacement of one or both o-f the protrusions 25 ancl 32 relative to the non-flexible menlber 34 and the connections 39 and 40. Such displacement of one or both of the protrusions 25 and 32 relative to the non-flexible member 34 and the ; connections 39 and 40 causes either one or both of the connections to electrical'ly ullcouple from its heretofore electrically associated protrusion thereby rendering the electrical device 10 inoperative.
FIGURE 2 of the drawing shows protrusions 25 and 32 electrically se-parated from the anode and cathode connections 39 and 40 respectively.
The electrically insulating, non-flexible member 34 is thereafter used to help avoid the possibllity of electrical reconnection between the protrusions 25 and/or 32 and anode and/or cathode connections 39 and 40 (as the case may be).
Referring now to FIGURE 4 of the drawing, a three terminal .
~96~
electrical device 50 is shown. The three terminal electrical device 50 includes a housing 11~ terminal assemblies 12, 13 and 51, two elec-trical components (not shown) having an electrically common cathode connection 40 and anode connections 39 and 52, and a dielectric li-quid (not shown) in the housing and contacting each of the electrical .; components. Each of the electrical components (not shownj may be a -. convolutely wound capacitor roll of the type described hereinbefore in the discussion of FIGURE 1.
Each of the terminal assemblies 12, 13 and 51 is constructed in an analoguous manner and as described in the description of terminal assemblies 12 and 13 shown in FIGURES 1 and 2.
- The non-flexible member 34 of FIGURES 4 and 5 of the draw-in~ includes an appropriate network of rein-forcing means or ribs 35 formed therein so as to further help minilllize any tendency of the member to flex in any direction. In adclition to apertures 37 ancl 38, the member 34, as shown in FIGURES 4 and 5, includes a third aperture 53 to accomlllodate protrusion 54 of terminal assembly 51. Anode connection 52 is bonded to the encl of protrusion 54 extending throuyh aperture 53.
Electrically insulating washer 55 retains the terminal assembly 51 in spaced relationship from electrical contact with cover 16.
: Upon doming the cover 16, protrusion 25 or protrusion 32 or protrusion 54 or any two protrusions or all protrusions are dis-placed relative to the non-flexible !nember causing the anode connec-tion 39 and/or the cathode connection 40 and/or the anode connection 52 to engage with adjacent surFace 41 of the non-flexible member 34.
Further doming of the wall or cover 16 causes further displacement of -: one or more of the protrusions relative -to the non-flexible member and the connections 39, 40 and 52. Such displacement of one or more of the protrusions 25, 32 and 54 relative to the non-flexible member 34 and the connections 39, 40 and 52 causes one or more of the connec-,~ ,, ~ .~9~
tions to electrically uncouple from its heretofore electrically associated protrusion in the manner as discussed in FIGURES 1 and
2 of the drawing thereby rendering the electrical device 50 inopera-tive. The electrically insulating, non-flexible member 34 is there-after used to help avoid the possibility of electrical reconnection ; between a protrusion and the anode and cathode connections. Whenusing a three terminal device as shown in FIGURE 4, it is desirable that at least two protrusions separate from their cooperatively as-sociated connection so that the electrical device is inoperative thereafter across any combination of terminals.
The term "electrical device" as used herein means and in-cludes, but is not limited to, any electrical device adapted for storing electrical energy such as a capacitor as well as any electri-cal device adapted for dischar~e of electrical energy by an electro-chemical reaction between positive and negative electrodes such as a battery.
The term "flu;d" as used herein medns and includes, but is not limited to, gases and liquids.
While the invention has been disclosed with respect to the presently preferred embodiments thereof, numerous modifications may be made by those skilled in the art without departing from the spirit thereof. Therefore, it is intended that -the appended claims cover modifications and variations which come within the spirit and scope of the claimed invention.
The term "electrical device" as used herein means and in-cludes, but is not limited to, any electrical device adapted for storing electrical energy such as a capacitor as well as any electri-cal device adapted for dischar~e of electrical energy by an electro-chemical reaction between positive and negative electrodes such as a battery.
The term "flu;d" as used herein medns and includes, but is not limited to, gases and liquids.
While the invention has been disclosed with respect to the presently preferred embodiments thereof, numerous modifications may be made by those skilled in the art without departing from the spirit thereof. Therefore, it is intended that -the appended claims cover modifications and variations which come within the spirit and scope of the claimed invention.
Claims (8)
1. An electrical device comprising a housing having a wall retaining at least one terminal, an electrical component with at least two connections within the housing, an apertured non-flexible member retained between the electrical component and the wall of the housing in spaced relation-ship to the connections, the terminal extending through an adjacent aperture in the non-flexible member in a direction toward the component, one of the connections electrically coupled to the terminal, the connection electrically coupled to the terminal at its end in spaced relation to the adjacent surface of the non-flexible member whereby displacement of the terminal relative to the non-flexible member due to slight dooming of the wall causes delayed engagement of the connection with the adjacent surface of the non-flexible member and upon engagement due to further dooming of the wall the connection and the terminal are electrically uncoupled rendering the electrical device inoperative.
2. The electrical device of claim 1, wherein the non-flexible member helps prevent electrical reconnection between the connection and the terminal.
3. The electrical device of claim 1, wherein the non-flexible member includes reinforcing means to reinforce the non-flexible member against flexing.
4. The electrical device of claim 3, wherein the reinforcing means are rib means.
5. The electrical device of claim 1, wherein the configuration of the terminal extending through the adjacent aperture and protruding beyond the adjacent surface of the non-flexible member is an elongated cylinder, the configuration of the connection is a strip and the con-figuration of the aperture is an elongated cylinger having a cross sectional area which is slightly greater than the cross sectional area of the terminal extending therethrough.
6. The electrical device of claim 1, wherein the device is adapted for storage of electrical energy.
7. The electrical device of claim 6, wherein the device is a capacitor.
8. The capacitor of claim 7, wherein the capacitor includes a liquid dielectric.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75909177A | 1977-01-13 | 1977-01-13 | |
| US759,091 | 1977-01-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1096000A true CA1096000A (en) | 1981-02-17 |
Family
ID=25054377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA290,588A Expired CA1096000A (en) | 1977-01-13 | 1977-11-10 | Internal disconnect electrical device |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5388153A (en) |
| AU (1) | AU515481B2 (en) |
| CA (1) | CA1096000A (en) |
| DE (1) | DE2801433A1 (en) |
| GB (1) | GB1577904A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4106068A (en) * | 1977-01-27 | 1978-08-08 | General Electric Company | Pressure sensitive interrupter |
| JPS5568335U (en) * | 1978-11-04 | 1980-05-10 | ||
| US4454561A (en) * | 1982-07-26 | 1984-06-12 | Emhart Industries, Inc. | Electrical component having a resistance element |
| DE3522073C2 (en) * | 1985-06-20 | 1994-12-15 | Siemens Ag | Electrical winding capacitor |
| JPH0662532U (en) * | 1993-02-09 | 1994-09-02 | ニチコン株式会社 | Aluminum electrolytic capacitor |
| JPH09129519A (en) * | 1995-10-30 | 1997-05-16 | Matsushita Electric Ind Co Ltd | Electrolytic capacitor with safety mechanism |
-
1977
- 1977-11-10 CA CA290,588A patent/CA1096000A/en not_active Expired
- 1977-11-21 GB GB4840577A patent/GB1577904A/en not_active Expired
- 1977-12-16 JP JP15160177A patent/JPS5388153A/en active Pending
-
1978
- 1978-01-03 AU AU32134/78A patent/AU515481B2/en not_active Expired
- 1978-01-13 DE DE19782801433 patent/DE2801433A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5388153A (en) | 1978-08-03 |
| GB1577904A (en) | 1980-10-29 |
| AU3213478A (en) | 1979-07-12 |
| DE2801433A1 (en) | 1978-07-27 |
| AU515481B2 (en) | 1981-04-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |