H. W. Johns Mfg. Company exhibit at Atlanta

H. W. Johns Manufacturing Company

at Atlanta.

One of the exhibits in the electricity building at the Atlanta exhibition which has attracted attention has been the electrical exhibit of the H. W. Johns Manufacturing company, which shows an attractive arrangement of insulating materials for electrical machinery and trolley lines. Among the insulating materials shown are trolley wire devices insulated with moulded mica. Special prominence is given to the giant strain insulators with their combinations for clevis and large eye. Also the "T. P." hanger, which was introduced during the last year. Special attention is also called to the "H. W. J." mechanical clip, which has proven most satisfactory in service.

H. W. Johns Manufacturing Company at Atlanta.

A large and comprehensive display is made of vulcabeston parts used in the controllers of various manufacturers, the list practically including the makers of all controllers, such as the Westinghouse, General Electric, Steele, Sperry, Worthington, Walker and the Curtis Electric companies. There are a number of specimens of brass switches and crossings and the Philadelphia insulated crossings and trolley wire breaks. These are insulated with specially impregnated fiber, which renders the fiber nun-absorbent.

The company exhibits a novel form of car heater, which consists of a resistance wire, interwoven with and insulated by asbestos. Tests have shown these heaters to be most economical, and also permit the use of a high temperature without detriment. Included in the exhibit is a device which introduces a new name to the trade — electrotherms. These are practically resistance mats, or pads, and are composed, like the car heaters, of a resistance wire insulated with asbestos. They are flexible and are covered with flannel or rubber, depending upon whether they are to be used for local applications of heat or in damp situations. They are specially adapted for medicinal purposes.

In glass cases are shown samples of moulded mica and Monarch insulating materials in a great variety of shapes for the insulation of switches, thermostatic and other devices, and vulcabeston parts as used in dynamos, motors, street car controllers and other electrical apparatus.

The company has received for its exhibits at the Atlanta exposition for asbestos manufactures and moulded mica and vulcabeston insulating materials one gold medal for superior excellence, two silver medals, two bronze medals and an honorable mention.