Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Kogyo

Eiichi Suzuki

Kenichi Aikou

Tugio Goto

Koji Goto

An electronic delay circuit for firing an ignition element. The delay circuit includes a capacitor which stores electric energy supplied from an electric blasting machine, an oscillator generating a clock pulse train, a circuit for over-exciting the oscillator, a counter which counts clock pulses of the clock pulse train, and a circuit for maintaining a reset state of the counter for a predetermined time period after the electric energy is supplied. The counter produces a trigger signal when it counts a predetermined number of the clock pulses, and the electric energy stored in the capacitor is discharged to the ignition element. Since the oscillator enters into the steady state in a very short time by the over-excitation, the delay circuit has large resistance to external noise.

Electronic delay circuit for firing ignition element

A cartridge for use in fixing an anchor bolt that encludes a fluidtight constructed casing having therein a first fluidtight chamber and a second fluidtight chamber separated from the first chamber, the first chamber containing a resin composed mainly of an ester of an epoxy resin with an organic acid comprising acrylic acid, methacrylic acid or a mixture thereof, the second chamber containing a curing agent for the resin. By the use of such a cartridge in fixing an anchor bolt to a base, there can be attained a quick fixation of the anchor bolt to the base, a high adhesive strength between the anchor bolt and the base, and a high chemical resistance of the cured resin, with little or no lowering of the adhesive strength for an prolonged period of time.

Growing community of inventors

Nobeoka, Japan

Eiichi Suzuki