This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 Excerpt: ...Switch. as it will go, corresponding to the position in which the current passes through the lamp, entering by the connections abed, and leaving by the connections e f g 7i, a and h, being the line wires, and d and e, the leads to the lamps. On the pulling down of the lever, the lamp is cut out from the circuit. When ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 Excerpt: ...Switch. as it will go, corresponding to the position in which the current passes through the lamp, entering by the connections abed, and leaving by the connections e f g 7i, a and h, being the line wires, and d and e, the leads to the lamps. On the pulling down of the lever, the lamp is cut out from the circuit. When the hook H is pulled down, the levers b and g, are forced together at their upper ends into clips in the centre of the box, thus short-circuiting the apparatus, and leaving the lamp by its clips c and/, totally disconnected from the circuit. We have already referred to the use of hoods, in connection with out-door light ing, for the double purposes of protecting the lamp and of throwing its light downwards. Some forms of lamp hoods are shown in the accompanying figures 76 to 81, from which it will be seen that a variety of Fig. 76.--Hanger Board In Position Under Hood. forms have been devised. In Fig. 76, a portion of the hood has been cut away to Fig. 77.--Hood To Be Supported By A Rope. show a portion of the hanger board. It will be noticed that the support of the hood is sometimes obtained from ropes, as in Figs. 77, 78 and 79, while in other cases, the hood is supported on a pole, as in Figs. 76, 80 and 81. The connecting wires Pig. 79.--Hood To Be Supported By A Rope. dip underneath the hood on their way to the lamp terminals. Fig. 79, shows a switch handle H, projecting through the hood. The hoods are usually made of japanned galvanized iron, so arranged as to aid in the reflection of light downwards. Fig. 80.--Hood Supported On Pole. It is necessary, in the operation of arc lamps, to protect the arc from currents of air which tend to increase its unsteadiness. This is effected by covering the arc with a transparent globe. Sxich globes ar...
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Add this copy of Electric ARC Lighting (1902) to cart. $42.56, new condition, Sold by Booksplease rated 3.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2010 by Kessinger Publishing.
Add this copy of Electric Arc Lighting (1902) to cart. $60.89, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2010 by Kessinger Publishing.
Add this copy of Electric Arc Lighting to cart. $74.74, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.
Add this copy of Electric Arc Lighting ( Electro-Technical Series) to cart. $132.00, very good condition, Sold by The Book House - Saint Louis rated 4.0 out of 5 stars, ships from St. Louis, MO, UNITED STATES, published 1896 by The W.J. Johnston Company.
