Electronic delay detonator

• US 5,942,718 A
• Filed: 05/14/1998
• Issued: 08/24/1999
• Est. Priority Date: 06/23/1995
• Status: Expired due to Fees

• Current Assignee: IBO Industrias Quimicas LTDA
• Original Assignee: IBO Industrias Quimicas LTDA
• Inventors: Falquete, Marco Antonio, Pellin, Reginaldo Jose
• Primary Examiner(s): Jordan, Charles T.
• Assistant Examiner(s): Wesson, Theresa M.
• Application Number:
  US08/981,393
• Time in Patent Office: 467 Days
• Field of Search: 102/207, 102/206, 102/202.5
• US Class Current: 102/207
• CPC Class Codes: F42B 3/121 Initiators with incorporated integrated circuit
• CPC Class Codes: F42D 1/045 Arrangements for electric ignition dynamo-electric generators H02K

Abstract

Patent of invention of an electronic delay detonator refers to a detonator meant to initiate explosive charges after an electronically predetermined delay time, transforming thermal energy generated by a heat source (2) into electrical energy through a miniaturized thermoelectronical battery (3), packed inside the detonator shell, placing the referred heating source over the heating face (3-A) of the battery (3) which has its opposing face unheated (3-B), being coupled in the detonator a nonelectrical initiation signal conductor medium (1) for the cap, having in the detonator shell the corresponding stages of a capacitor (4) for storage of electrical energy, an electronic timing circuit (5) which provokes the energization of the electric squib, following the detonation of a primary explosive (7) and a consequent detonation of the secondary explosive (8).

Claims

1. An electronic delay detonator comprising:

couples forming a nonelectric conducting signal medium for the initiation of a blasting cap,

a detonator shell comprising corresponding stages of a capacitor for storage of electrical energy,

an electronic timing circuit which provokes the energization of an electric squib following detonation of a primary explosive and a consequent detonation of a secondary explosives,

a heat source disposed in an interior of said detonator over a heated face of a miniaturized thermoelectrical battery, an opposing face of said battery is not heated.

2. The electronic delay detonator according to claim 1 wherein:

said battery including a connection of electrical conductors composed of different materials, said connection with heated junctions and unheated junctions, respective to said heated face and said unheated face.

3. The electronic delay detonator according to claim 1 wherein:

said battery being formed by the serial connection of "N" and "P" semiconductor material couples with electrical isolation and metallic connections between said couples.

4. The electronic delay detonator according to claim 1 wherein:

battery directly converting heat into electricity by a Seebeck effect.