Patents by Inventor Brooke J. Calder, Jr.
Brooke J. Calder, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4166418Abstract: An improved delay primer unit for detonating an explosive material in a borehole with a detonating cord down line extending into the borehole. The primer comprises an explosive element capable of detonating the explosive material upon being detonated, means for preventing direct detonation of the explosive element by the down line, a time delay detonating element extending between the down line and the explosive element with a known detonation time delay value between first and second ends of the delay element, means slidably associating the first end with the down line and means for connecting the second end in detonation relationship with the explosive element. The improvement in this type of unit is the provision of the explosive element as a support element and a detonating cord wrapped around the support element to form a primer.Type: GrantFiled: May 23, 1977Date of Patent: September 4, 1979Assignee: Austin Powder CompanyInventor: Brooke J. Calder, Jr.
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Patent number: 4141296Abstract: A method of charging a borehole with at least first and second separate sections of explosive material, which method comprises the steps of providing a detonating cord extending into the borehole, providing a first primer on a first carrier having a time delay connection between the cord and the first primer, this time delay having a first selected value, providing a second primer on a second carrier having a time delay connection between a cord and the second primer, the time delay of the second carrier having a second selected value different from the first selected value, sliding the first carrier and primer along the cord and into detonation association with the first section of explosive material and sliding the second carrier and primer along the same cord to detonation association with the second section of explosive material.Type: GrantFiled: November 11, 1976Date of Patent: February 27, 1979Assignee: Austin Powder CompanyInventors: Brooke J. Calder, Jr., David L. Childs, Roger N. Prescott, Donald W. Lyons
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Patent number: 4133247Abstract: A method of charging a borehole with at least first and second separate sections of explosive material, which method comprises the steps of providing a detonating cord extending into the borehole, providing a first primer on a first carrier having a time delay connection between the cord and the first primer, this time delay having a first selected value, providing a second primer on a second carrier having a time delay connection between a cord and the second primer, the time delay of the second carrier having a second selected value different from the first selected value, sliding the first carrier and primer along the cord and into detonation association with the first section of explosive material and sliding the second carrier and primer along the same cord to detonation association with the second section of explosive material.Type: GrantFiled: January 3, 1978Date of Patent: January 9, 1979Assignee: Austin Powder CompanyInventors: Brooke J. Calder, Jr., David L. Childs, Roger N. Prescott, Donald W. Lyons
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Patent number: 4085676Abstract: There is provided an elongated, flexible unitary detonating device of indeterminate length for detonating a selected explosive material within a bore hole. The detonating device includes, in combination, a detonating cord capable of detonating the selected explosive material when initiated while in direct contact with the selected explosive and a flexible energy absorbing layer formed around and carried by the detonating cord. The energy absorbing layer is formed from an energy absorbent material and has a radial thickness sufficient to preclude detonation of the selected explosive in direct contact with the energy absorbing layer when the detonating cord is initiated. In addition, an arrangement is provided for allowing stripping of the energy absorbing layer from the detonating cord at any selected position along the detonating cord to expose a portion of the detonating cord.Type: GrantFiled: December 2, 1976Date of Patent: April 25, 1978Assignee: Austin Powder CompanyInventors: Brooke J. Calder, Jr., Robert J. Belock, Roger N. Prescott
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Patent number: 4024817Abstract: There is provided an elongated, flexible unitary detonating device of indeterminate length for detonating a selected explosive material within a bore hole. The detonating device includes, in combination, a detonating cord capable of detonating the selected explosive material when initiated while in direct contact with the selected explosive and a flexible energy absorbing layer formed around and carried by the detonating cord. The energy absorbing layer is formed from an energy absorbent material and has a radial thickness sufficient to preclude detonation of the selected explosive in direct contact with the energy absorbing layer when the detonating cord is initiated. In addition, an arrangement is provided for allowing stripping of the energy absorbing layer from the detonating cord at any selected position along the detonating cord to expose a portion of the detonating cord.Type: GrantFiled: June 2, 1975Date of Patent: May 24, 1977Assignee: Austin Powder CompanyInventors: Brooke J. Calder, Jr., Robert J. Belock, Roger N. Prescott
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Patent number: RE30621Abstract: A method of charging a borehole with at least first and second separate sections of explosive material, which method comprises the steps of providing a detonating cord extending into the borehole, providing a first primer on a first carrier having a time delay connection between the cord and the first primer, this time delay having a first selected value, providing a second primer on a second carrier having a time delay connection between a cord and the second primer, the time delay of the second carrier having a second selected value different from the first selected value, sliding the first carrier and primer along the cord and into detonation association with the first section of explosive material and sliding the second carrier and primer along the same cord to detonation association with the second section of explosive material.Type: GrantFiled: April 16, 1980Date of Patent: May 26, 1981Assignee: Austin Powder CompanyInventors: Brooke J. Calder, Jr., David L. Childs, Roger N. Prescott, Donald W. Lyons
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Patent number: RE31953Abstract: A method of charging a borehole with at least first and second separate sections of explosive material, which method comprises the steps of providing a detonating cord extending into the borehole, providing a first primer on a first carrier having a time delay connection between the cord and the first primer, this time delay having a first selected value, providing a second primer on a second carrier having a time delay connection between a cord and the second primer, the time delay of the second carrier having a second selected value different from the first selected value, sliding the first carrier and primer along the cord and into detonation association with the first section of explosive material and sliding the second carrier and primer along the same cord to detonation association with the second section of explosive material.Type: GrantFiled: December 31, 1980Date of Patent: July 23, 1985Assignee: Austin Powder CompanyInventors: Brooke J. Calder, Jr., David L. Childs, Roger N. Prescott, Donald W. Lyons