Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 78
3. Jockey Roller Spring. The tension of the jockey roller spring shall be 100 grams, measured as.shown in Figure 6. … 4. Sliding Bar Lower Adjusting Nuts. Set the lower nuts on the sliding bar so thatthe feed pawl has stroke enough to carry the ratchet tooth just sufficiently beyond thecenter of the jockey roller to permit the roller to complete the stopping of the feed wheel.This adjustment must be very,…
Telegraph
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