Abstract This invention relates to an explosive type switching device and comprises a main explosive charge, means for causing the detonation of this main explosive charge in response to an electrical signal, a deformable diaphragm adapted to be deformed by the detonation of the explosive charge such that a shaft is projected forward from a first position to a second position in response to the deformation. The movement of said shaft causes the actuation and change of mode of at least two sets of fixed contacts. Movement of the shaft transposes at least one electrical contact member such that the first set is electrically connected to each other when said shaft is in the first position. Upon movement of the shaft the first set of fixed contacts are irreversibly disconnected from each other and the shaft moves the electrical contact member to a second position irreversibly connecting the second set of fixed contacts to each other through the contact member. The second set of contacts are located at a plane transverse to the plane of the first set of contacts.
An explosive-type switching device comprising a main explosive charge; means including an electrothermal element for causing the detonation of said main explosive charge in response to an electrical impulse; a deformable diaphragm adapted to be deformed by the detonation of said explosive charge; a shaft adapted to move axially from a first position to a second position in response to the deformation of said diaphragm; at least one electrical contact member carried by said shaft; and at least a first and secOnd set of fixed contacts, said fixed contacts of said first set being electrically connected to each other through said contact member when said shaft is in said first position and being irreversibly and electrically disconnected from each other when said shaft is in said second position and said fixed contacts of said second set being irreversibly and electrically connected to each other through said contact member when said shaft is in said second position, said second set of contacts being located in a plane perpendicular to the plane in which said first set of contacts are located, and wherein said electrical contact member carried by said shaft comprises a metallic cup surrounding the end portion of said shaft.
Claim 2
Dependent Claim
200 words
An explosive-type switching device comprising a main explosive charge; means including an electrothermal element for causing the detonation of said main explosive charge in response to an electrical impulse; a deformable diaphragm adapted to be deformed by the detonation of said explosive charge; a shaft adapted to move axially from a first position to a second position in response to the deformation of said diaphragm; at least one electrical contact member carried by said shaft; and at least a first and secOnd set of fixed contacts, said fixed contacts of said first set being electrically connected to each other through said contact member when said shaft is in said first position and being irreversibly and electrically disconnected from each other when said shaft is in said second position and said fixed contacts of said second set being irreversibly and electrically connected to each other through said contact member when said shaft is in said second position, said second set of contacts being located in a plane perpendicular to the plane in which said first set of contacts are located, and wherein said electrical contact member carried by said shaft comprises a metallic cup surrounding the end portion of said shaft.
Claim 3
Dependent Claim
18 words
The invention as defined in claim 1 wherein said cup has a flared portion to prevent premature motion.
Claim 4
Dependent Claim
90 words
The invention as defined in claim 2 wherein said means for causing the detonation of said main explosive charge includes a pyrotechnic delay element interposed between said electrothermal element and said main explosive charge, for delaying the ignition of said main explosive charge by a time dependent upon the dimensions and combustion characteristics of said element, and which further comprises a paper separator and a perforated metal disc for maintaining said delay element properly positioned and for permitting the propagation of flame and hot gases to ignite said main charge.