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A detonator device and assembly for the initiating a plurality of signal transmission lines with a pressure impulse. The detonator device comprising a detonator casing having a signal receiving end and a firing end. The firing end of the detonator device being substantially shaped to conform with th

A detonator device and assembly for the initiating a plurality of signal transmission lines with a pressure impulse. The detonator device comprising a detonator casing having a signal receiving end and a firing end. The firing end of the detonator device being substantially shaped to conform with the pressure impulse initiation therein. The firing end having a contact wall of substantially uniform thickness for contacting a plurality of signal transmission lines in a compatible connector element and transmitting a pressure impulse thereto.

대표청구항 ▼

A detonator device and assembly for the initiating a plurality of signal transmission lines with a pressure impulse. The detonator device comprising a detonator casing having a signal receiving end and a firing end. The firing end of the detonator device being substantially shaped to conform with th

A detonator device and assembly for the initiating a plurality of signal transmission lines with a pressure impulse. The detonator device comprising a detonator casing having a signal receiving end and a firing end. The firing end of the detonator device being substantially shaped to conform with the pressure impulse initiation therein. The firing end having a contact wall of substantially uniform thickness for contacting a plurality of signal transmission lines in a compatible connector element and transmitting a pressure impulse thereto. active region produces a magnetic field varying with said applied torque; a first torque transmitting element directly or indirectly attached to or forming a part of said member at said central axis of rotation in such a manner that torque is proportionally transmitted between said member and said first transmitting element; a second torque transmitting element directly or indirectly attached to or forming a part of said member at the periphery of said member in such a manner that torque is proportionally transmitted between said member and said second transmitting element; one of said first and second transmitting elements being the element through which applied torque is transmitted to said member and the other of said transmitting elements being the element through which torque transmitted radially through said member is transmitted away from said member; magnetic field sensor means mounted proximate to said magnetoelastically active region and oriented with respect thereto to sense the magnitude of the magnetic field at said sensor means and provide said output signal in response thereto; at least said magnetoelastically active region of said member being formed of a material having a coercivity sufficiently high that the field arising from said member does not magnetize regions of said member proximate to said member to give rise to parasitic magnetic fields which are of sufficient strength to destroy the usefulness, for torque sensing purposes, of the net magnetic field seen by said magnetic field sensor means. 2. A magnetoelastic torque sensor, as claimed in claim 1, wherein said member is formed of a polycrystalline material wherein at least 50% of the distribution of local magnetizations lie within a 90° quadrant symmetrically disposed around said single circular direction. 3. A magnetoelastic torque sensor, as claimed in claim 2, wherein said member is formed of a polycrystalline material wherein each crystallite has cubic symmetry. 4. A magnetoelastic torque sensor, as claimed in claim 1, wherein said member is formed of a material selected from the group consisting of martensitic stainless steels, precipitation hardening stainless steels containing chromium and nickel, quenched and tempered alloy steels, tool steels, high nickel content maraging steels, ductile permanent magnet materials, magnet steels, Permendur, Alfer, Kovar, hard drawn nickel and hard drawn Permalloy. 5. A magnetoelastic torque sensor, as claimed in claim 1, wherein the coercivity of said member is greater than 15 Oe. 6. A magnetoelastic torque sensor, as claimed in claim 1, wherein the coercivity of said member is greater than 20 Oe. 7. A magnetoelastic torque sensor, as claimed in claim 1, wherein the coercivity of said member is greater than 35 Oe. 8. A magnetoelastic torque sensor, as claimed in claim 1, wherein said magnetic field sensor means comprises a solid state sensor. 9. A magnetoelstic torque sensor, as claimed in claim 1, wherein said magnetic field sensor means comprises a flux gate inductor. 10. A magnetoelastic torque sensor, as claimed in claim 1, wherein said magnetic field sensor means is mounted and oriented with respect to said magnetoelastically active region to sense the polarity of said magnetic field. 11. A magnetoelastic torque sensor, as claimed in claim 10, wherein said magnetic field sensor means is mounted in a fixed position relative and proximate to said magnetoelastically active region. 12. A magnetoelastic torque sensor, as claimed in claim 10, wherein said sensor means is positioned radially centered over said magnetoelastically active region. 13. A magnetoelastic torque sensor, as claimed in claim 12, wherein said sensor means comprises at least two sensors positioned proximate one of the opposite surfaces of said member. 14. A magnetoelastic torque sensor, as claimed in claim 11, wherein said sensor means comprises at least one sensor positioned proximate each of the opposite surfaces of said membe r. 15. A magnetoelastic torque sensor, as claimed in claims 11 wherein said member is tapered in a radial direction from a thick end at the axis of rotation to a thin end at the periphery. 16. A magnetoelastic torque sensor, as claimed in claim 15, wherein said sensor means is positioned at the periphery of said member. 17. A magnetoelastic torque sensor, as claimed in claim 1, wherein said magnetoelastically active region comprises two or more circumferentially distinct, magnetically contiguous, circumferential regions which are oppositely polarized in a circumferential direction. 18. A magnetoelastic torque sensor, as claimed in claim 17, wherein said sensor means is positioned proximate to said member and overlying the intersection of the contiguous, oppositely polarized circumferential regions. 19. A magnetoelastic torque sensor, as claimed in claim 17, wherein said magnetoelastically active region comprises two contiguous, oppositely polarized circumferential regions, said sensor means comprises two sensors positioned along the same radial line, one sensor being radially centered over each of the contiguous oppositely polarized regions. 20. A magnetoelastic torque sensor, as claimed in claim 1, wherein said magnetoelastically active region has, in the absence of a torque applied to said member, a circumferential magnetic orientation having no net magnetization component in the radial direction of said member. 21. A magnetoelastic torque sensor, as claimed in claim 1, wherein said first torque transmitting element comprises hub means for connecting a shaft to said member. 22. A magnetoelastic torque sensor, as claimed in claim 1, wherein said second torque transmitting element is a rim having a connecting device for connecting the rim to an external member. 23. A magnetoelastic torque sensor, as claimed in claim 1, wherein said first and second transmitting elements are formed of a low permeability material. 24. A magnetoelastic torque sensor, as claimed in claim 1, including low permeability spacing means for spacing said first and second transmitting elements from said magnetoelastically active region. 25. A method of sensing a torque transmitted between radially separated locations, comprising the steps of: (a) providing a magnetoelastically active region comprising a ferromagnetic, magnetostrictive disk-shaped member having opposite generally circular surfaces and a central axis of rotation, said region being magnetically polarized in a single circumferential direction and possessing sufficient magnetic anisotropy to return the magnetization in said region, following the application of torque to said member, to said single circumferential direction when the applied torque is reduced to zero, said magnetoelastically active region being formed of a material having a coercivity sufficiently high that the torque induced field arising from said magnetoelastically active region does not magnetize regions of said member proximate to said magnetoelastically active region to give rise to parasitic magnetic fields which are of sufficient strength to destroy the usefulness, for torque sensing purposes, of the net magnetic field seen by magnetic field sensing means; (b) providing first and second torque transmitting elements directly or indirectly attached to or forming a part of said member at said central axis of rotation and said periphery of said member in such a manner that torque is proportionally transmitted between said member and said transmitting elements; (c) transmitting torque to said member through one of said first and second transmitting elements, radially through said member and away from said member through the other of said transmitting elements; (d) producing a magnetic field as a consequence of transmitting torque radially through said member; and (e) sensing the magnitude of the magnetic field at a position proximate to said magnetoelastically active region as an indication of the magnitude of the torq