y as the valve travels The oil cup of the bolster being supplied with oil, the 4 -+0 +e... -- —__.- back and forth, and exhausts down past the end into the bearing surfaces of the bolster and the part of the spindle Daniel Drawbaugh’s Telephones. exhaust chamber or heater. within it will be… … of four one-inch pipes, the Bell had any thought of tele- entire length of cylinder and phonic communication. Since bed, and delivers the water the Bell telephone went into .to the boiler very hot. Pump and heater are dispensed with tercepting cup, which, revolving with the spindle, will by…
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