Combined signal transmission device and detonating cord for blasting assembly

- Nitro Nobel AB
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Description

FIG. 1 is a side elevational view of a combined signal transmission device and detonating cord for blasting assembly with the side loop omitted showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a rear perspective view thereof;

FIG. 4 is a side elevational view thereof with the side loop; and,

FIG. 5 is a side elevational view thereof without the side loop.

Referenced Cited
U.S. Patent Documents
4426933 January 24, 1984 Yunan
4481884 November 13, 1984 Yunan
4539909 September 10, 1985 Day et al.
Patent History
Patent number: D301599
Type: Grant
Filed: May 27, 1987
Date of Patent: Jun 13, 1989
Assignee: Nitro Nobel AB (Gyttorp)
Inventor: Lars-Gunnar Lofgren (Gyttorp)
Primary Examiner: A. Hugo Word
Law Firm: Frishauf, Holtz, Goodman & Woodward
Application Number: 7/54,665
Classifications
Current U.S. Class: Explosive Or Pyrotechnic Article (D22/112)