Air, Light and Efficiency Showing Influence of Sash Types and Building Design . Sash partly open. The T-shaped leversare attached one to each tension Sash fully opened. The tension of therod is converted into a direct thrust againstthe sash. quickly opened and closed by o?ie responsible person. 43 JS AIR, LIGHT AND EFFICIENCY For unusually lung lines, or to operate a number of lines together,^\?e recommend Pond Operating Device, Motor Driven. Thisembodies an A. C. motor specially wound for high starting automatic cut-out limits the movement of the sash in each direc-tion, and t
Air, Light and Efficiency Showing Influence of Sash Types and Building Design . Sash partly open. The T-shaped leversare attached one to each tension Sash fully opened. The tension of therod is converted into a direct thrust againstthe sash. quickly opened and closed by o?ie responsible person. 43 JS AIR, LIGHT AND EFFICIENCY For unusually lung lines, or to operate a number of lines together,^\?e recommend Pond Operating Device, Motor Driven. Thisembodies an A. C. motor specially wound for high starting automatic cut-out limits the movement of the sash in each direc-tion, and the sash may be controlled by the switch to stand at anydegree of opening desired. Enclosed gearing and electric motorof Pond Operating Device. MotorDriven.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectr, booksubjectwindows
