Safety device for conveyor belt
AssigneeBando Chemical Industries, Ltd.
InventorsKeigo Takeno, Yasuyuki Matsunaga, Ryoichi Nomura, Akihiro Nagata
Life of this patent
Estimating the term…
Abstract
A safety device for a conveyor belt which comprises a pair of magnets buried in a joint of a belt or buried in the belt with the joint therebetween, with a certain space left therebetween in the lengthwise direction of the belt, a magnetic inductor arranged oppositely to said magnets, an oscillograph connected to said magnetic inductor for self-recording or a detecting device connected to said magnetic inductor for detecting any elongation at the joint in its early stages.
Claims7
A safety device to detect elongation in a conveyor belt joint, said conveyor belt adapted to move at a substantially constant speed, said safety device comprising at least one first permanently magnetized area within said conveyor belt, at least one second permanently magnetized area within said conveyor belt and initially spaced a standard distance apart from said first at least one permanently magnetized area along the length of said conveyor belt, said first permanently magnetized area in the proximity of the forwardmost portion of said conveyor belt joint, said second permanently magnetized area in the proximity of the aftermost portion of said conveyor belt joint, at least one inductor adapted to respond to at least one said first permanently magnetized area and to at least one said second permanently magnetized area as said conveyor belt is moving past it, and means to measure the time lapse between said first permanently magnetized area response and said second permanently magnetized area response whereby the distance between said first and second permanently magnetized areas may be measured.
Dependencies are inferred from the claim text.