| 摘要 |
PURPOSE:To continuously visualize the flow of gas, by operating an operation rod, of which the leading end is provided with an applicator having not only an oil container provided to the upper part thereof but also a coating head provided to the lower end thereof and further by a fine connection pipe between, from the outside of a visualized container. CONSTITUTION:When the oil adhered to a wire 4 is converted to smoke to be lost, a rotary introducing device 20 is operated to reciprocally move a coating head 6 and the oil is again applied to the wire 4 by said head 6. In this case, the oil passes through a fine pipe 22 to be continuously infiltrated in the coating head 6 from an oil container 9 and, therefore, it is unnecessary to move the coating head 6 to the oil container to immerse the same therein according to a conventional method and smoke is continuously generated from the wire 4. The rotary introducing device 20 capable of being operated from the outside of a visualized container 1 and driving the spur gear 19 meshing with the rack 18 of the operation rod 7 is mounted to a cylindrical pipe 11.
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