The Practical Telephone Handbook And Guide to the Telephonic Exchange
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In our eReader you can find the full English version of the book. Read The Practical Telephone Handbook And Guide to the Telephonic Exchange Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Practical Telephone Handbook And Guide to the Telephonic Exchange
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164. Scale i.
TEST-ROOM APPLIANCES.
185 form one panel of the test-board, accommodating 400 lines.
Lightning Arrester Board. The other side of the above blocks is shown in Fig. 165. E E is a brass strip screwed on to the ebonite. The serrated edges of the brass plates F F are clamped very close to but not touching E E, which is normally connected to earth by means of a plug at the bottom end. To prevent leakage between the plates F F and E, the ebonite is grooved out underneath, as shown in Fig.... 164. To pre- vent leakage from the F plates on one block to those on the next, a small space is left when fixed, as also shown in Fig. 164.
It will be seen that when the blocks are fixed side by side, a series of troughs are formed. Into those, in which are the springs C c, the leads from the line wires are brought Fi s- '65. Scale from a large trough fixed about 9 ft. From the floor. These are threaded through sm^ll holes to the other face of the block, and are there clamped to the plates F F.
What to read after The Practical Telephone Handbook And Guide to the Telephonic Exchange?
You can find similar books in the "Read Also" column, or choose other free books by Joseph Poole to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
164. Scale i.
TEST-ROOM APPLIANCES.
185 form one panel of the test-board, accommodating 400 lines.
Lightning Arrester Board. The other side of the above blocks is shown in Fig. 165. E E is a brass strip screwed on to the ebonite. The serrated edges of the brass plates F F are clamped very close to but not touching E E, which is normally connected to earth by means of a plug at the bottom end. To prevent leakage between the plates F F and E, the ebonite is grooved out underneath, as shown in Fig.... 164. To pre- vent leakage from the F plates on one block to those on the next, a small space is left when fixed, as also shown in Fig. 164.
It will be seen that when the blocks are fixed side by side, a series of troughs are formed. Into those, in which are the springs C c, the leads from the line wires are brought Fi s- '65. Scale from a large trough fixed about 9 ft. From the floor. These are threaded through sm^ll holes to the other face of the block, and are there clamped to the plates F F.
What to read after The Practical Telephone Handbook And Guide to the Telephonic Exchange?
You can find similar books in the "Read Also" column, or choose other free books by Joseph Poole to read onlineMoreLess
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