The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 1987
Filed:
Nov. 09, 1984
Applicant:
Inventors:
Richard Bender, Lauf/Bayern, DE;
Hellmut Bendler, Nuremberg, DE;
Horst Penner, Furth/Bayern, DE;
Reinhold Sander, Seukendorf/Bayern, DE;
Assignee:
Dynamit Nobel Aktiengesellschaft, Troisdorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F42E / ;
U.S. Cl.
CPC ...
1022025 ; 1022023 ;
Abstract
An electric detonator has a casing and a pole piece electrically insulated with respect to the casing by means of an insulating cup, as well as with an ignition resistor electrically conductively connected to the casing and to the pole piece. In order to avoid undesirable charges on the insulating cup, which could be the cause of misfirings, the insulating cup is associated with an electrically conductive coating in contact with the casing and with the pole piece.