Abstract: A frangible joint for a structure is provided. The structure is provided having a first portion and a second portion with a feature defining a fracture plane disposed therebetween. A first housing is coupled to a first side of the first portion, the first housing having a first slot adjacent the first side and a first wall member adjacent the feature. A second housing is coupled to the second portion the first housing, the second housing having a second slot adjacent the second side and a second wall adjacent the feature opposite the first wall. A first expanding tube assembly is disposed within the first slot. The first expanding tube assembly having a first tube containing a first explosive core. A second expanding tube assembly is disposed within the second slot. The second expanding tube assembly having a second metallic tube containing a second explosive core.

Abstract: An elastomeric charge holder includes one or more holes formed therein into which is disposed an explosive charge. The elastomeric charge holder further includes one or more metal wires also disposed within the elastomeric charge holder. The elastomeric charge holder may be over molded or over extruded over each of the one or more metal wires, thereby retaining each of the one or more wires in place during use of the elastomeric charge holder. The one or more wires are also a better match of thermal coefficients to a metal confinement tube that holds the elastomeric charge holder, which results in improved retention of the elastomeric charge holder in place, particularly during initiation of the explosive charge.

Abstract: An elastomeric charge holder includes one or more holes formed therein into which is disposed an explosive charge. The elastomeric charge holder further includes one or more metal wires also disposed within the elastomeric charge holder. The elastomeric charge holder may be over molded or over extruded over each of the one or more metal wires, thereby retaining each of the one or more wires in place during use of the elastomeric charge holder. The one or more wires are also a better match of thermal coefficients to a metal confinement tube that holds the elastomeric charge holder, which results in improved retention of the elastomeric charge holder in place, particularly during initiation of the explosive charge.

Abstract: An end cap seal assembly for an electrochemical cell such as an alkaline cell is disclosed. The end cap assembly comprises a convoluted end cap which may also function as a cell terminal and an underlying insulating sealing disk. The insulating sealing disk comprises a central boss and radially extending arm terminating in a downwardly sloped elbow and upwardly sloped peripheral edge. The end cap disk has at least one vent aperture therethrough which faces the ambient environment. The insulating disk has an annular groove in its top or bottom surface, which preferably circumvents the central boss. The base of the groove defines an a rupturable membrane portion of the insulating sealing disk. The rupturable membrane is designed to rupture, preferably when the cell internal gas pressure reaches a level between about 150 and 900 psig (1034×103 and 6206×103 pascal gage) advantageously, between about 150 and 700 psig (1034×103 and 4827×103 pascal gage).

Abstract: An end cap seal assembly for an electrochemical cell such as an alkaline cell is disclosed. The end cap assembly comprises a convoluted metal support disk and underlying insulating sealing disk. The convoluted support disk has a downwardly extending wall with at least one aperture therethrough which preferably faces the ambient environment. The insulating disk has a slanted downwardly extending wall forming a rupturable membrane which underlies and abuts the inside surface of the downwardly extending wall of the support disk. The rupturable membrane is slanted downwardly at an acute angle with the cell's longitudinal axis. The rupturable membrane underlies and abuts the aperture in the downwardly extending wall of the end cap. When gas pressure within the cell exceeds a predetermined level the rupturable membrane pushes through said aperture and ruptures allowing gas to escape therefrom to the environment. A separate terminal plate can be stacked onto the metal support disk and welded thereto.

Abstract: An end cap seal assembly for an electrochemical cell such as an alkaline cell is disclosed. The end cap assembly comprises a convoluted end cap which may also function as a cell terminal and an underlying insulating sealing disk. The insulating sealing disk comprises a central boss and radially extending arm terminating in a downwardly sloped elbow and upwardly sloped peripheral edge. The end cap disk has at least one vent aperture therethrough which faces the ambient environment. The insulating disk has an annular groove in its top or bottom surface, which preferably circumvents the central boss. The base of the groove defines an a rupturable membrane portion of the insulating sealing disk. The rupturable membrane is designed to rupture, preferably when the cell internal gas pressure reaches a level between about 150 and 900 psig (1034×103 and 6206×103 pascal gage) advantageously, between about 150 and 700 psig (1034×103 and 4827×103 pascal gage).

Abstract: An end cap seal assembly for an electrochemical cell such as an alkaline cell is disclosed. The end cap assembly comprises a convoluted metal support disk and underlying insulating sealing disk. The convoluted support disk has a downwardly extending wall with at least one aperture therethrough which preferably faces the ambient environment. The insulating disk has a slanted downwardly extending wall forming a rupturable membrane which underlies and abuts the inside surface of the downwardly extending wall of the support disk. The rupturable membrane is slanted downwardly at an acute angle with the cell's longitudinal axis. The rupturable membrane underlies and abuts the aperture in the downwardly extending wall of the end cap. When gas pressure within the cell exceeds a predetermined level the rupturable membrane pushes through said aperture and ruptures allowing gas to escape therefrom to the environment. A separate terminal plate can be stacked onto the metal support disk and welded thereto.