Carhart Tree Insulator

TRADE NOTES AND NOVELTIES

AND MECHANICAL DEPARTMENT.

"Conventions come and conventions go, but an

'ad.' talks on forever."

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ELECTRIC LIGHTING SPECIALTIES OF E. M. CARHART & CO.

A number of inventions and improvements for electric lighting purposes have recently been devised by Mr. Van A. Thomas, superintendent of the Narragansett Electric Lighting Co., of Providence, R. I., some of which we illustrate in the accompanying drawings, as manufactured by E. M. Carhart & Co., of Providence, R. I.

Figs. 1. and 2. — Mast Arm.

The mast arm, shown in Fig. 1, is simple, strong and durable, made of two pieces of L iron, which are used as conductors as well as for the track to carry the lamp out over the street. These tracks with the supporting brace, are insulated from the pole, dispensing with the cable, which has always been a source of annoyance, as well as incurring continual expense. A switch is placed on the pole to switch out the lamp circuit while the lamp is being trimmed. Fig. 2 shows a section of the arm.

Figs. 3. — Tree Insulator.

By the use of the tree insulator, shown in Fig. 3, the line is kept in a normal position, while the tree is allowed to sway in the wind, thus relieving the wire of all strain.

Figs. 4. — Carbon Holder.

Figs. 5. — Insulation for Arc Lamps.

The carbon holder, shown in Fig. 4, is claimed to be an improvement over any other in use. "When the thumb screw is turned to take out the carbon, it holds the adjustable part of the holder open ready to receive the new carbon. The operation will be readily understood by reference to the illustration.

The arc lamp insulation, Fig. 5, is intended for use upon lamps that are necessarily hung so low as to admit of being accidentally touched. It is made to fit any style of lamp.

Figs. 6. — Adjustable Pole Step.

The detachable pole step for trimmers, shown in Fig. 6, does away with the necessity of the trimmer carrying a ladder, in addition to his load of carbons. A socket is fastened to each side of the pole, and the trimmer, taking two small steps, places one in each of the socket, goes up the pole, trims the lamp, comes down, takes out his steps, replaced them in his pocket, and goes to the next lamp post, and so on, thus accomplishing a greater amount of work.

Figs. 7. — Cable Clip.

The cable clip, Fig. 7, is simple in construction, easily adjusted in passing a fixture, and very durable, being made of the best galvanized iron.

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