Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 572
g that it carries the door farenough to give the lock the proper-contact. By merely revolving thewheel right or left, the spring tight-ens or loosens and accordingly the doormoves quickly or slowly to suit condi-tions. The Monarch Hangers are noiselessdue to the fact that the wheels havewide… … bai con- Inunil operating device suchnecting the doors whichmust elevator fronts. Another good feature of importanceespecially where automatic elevatorsare used is the spring mechanism at-tached to one wheel making it possibleto close doors tightly merely by start-ing them. As generally known, the…
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