Posted by showcrop on July 22, 2018 at 14:39:58 from (75.68.37.174):
I have been taking up flooring as part of the process for putting down a new floor. There were two half inch holes in the old wide pine floor boards an inch from a wall. Then in the basement I found next to one hole, a small pulley with a one inch wheel that aligned with one of the holes. This pulley also aligned with where a coal fired boiler would have been. This told me that there was a control of some sort mounted on the wall above the holes. A quick search showed me a diagram of a thermostatic control for the draft of a boiler which connects to the boiler by a pair of cables running through pulleys. The house where I grew up which was built in 1949 had hydronic heat via an oil burner and cast iron radiators. I know that there were however still plenty of coal fired boilers well into the sixties. Does anyone remember a thermostat that controlled the boiler by this type of system?
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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