than this is obtained the side motion of the car tensible heel- may produce lateral pressures of from 3,000 to 57,000 0 portion ar- pounds on-the couplers. AN IMPROVED SAW-SHARPENER. ranged to ele- In order to determine the relative positions of two A novel device for sharpening the teeth of saws,… … interest to prospective inventors of car-couplers we with the heel. The body give them for what they are worth. The essentials of the disk acts as a flex- changing the pitch of the saw-teeth, is the subject of are: First, that the coupler will couple on any prac- ible diaphragm, and its an…
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