ELECTRIC DETONATOR WITH ELECTROMECHANICAL LOCKING Russian patent published in 2017 - IPC F42C19/12 

FIELD: electricity.

SUBSTANCE: electric detonator with electromechanical locking contains a body with terminals, inside of which there is an explosive charge, an initiator with electrical leads, a key in the form of two-component microelectromechanical system (hereinafter referred to as MEMS-key), consisting of two groups of electrically independent and initially open contacts, activated by a load, an electronic time unit, that provides a countdown of the action of overload exceeding the threshold level, and generates an electrical impulse at the output in case of exceeding the duration of overload, exceeding the threshold level, of a specific time value. The contact groups are designed so that the closure of contacts of different groups is carried out under the action of forces, the direction of which is interperpendicular for different contact groups. The MEMS-key is located in the body of the electric detonator so that the closure of contacts of one group is performed under the influence of longitudinal overload, exceeding the threshold level, and the closure of contacts of another group is performed under the influence of centrifugal forces when the electric detonator rotates around the longitudinal axis. The group of contacts, triggered by the action of longitudinal overload, is connected to the terminal of the electric detonator through one contact and to the input of electronic time unit through another contact. The output of the electronic time unit is connected to the electrical lead of the initiator. The group of contacts, triggered by the centrifugal force, is connected to the second terminal of the electric detonator through one contact, and to the second electrical lead of the initiator through the other contact.

EFFECT: invention makes it possible to increase the safety of the electric detonator in service use.

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