Window power actuating device

Claim 1

A power window actuating device for double hung windows, said device comprising: a first vertical plate attached to a window frame, said first vertical plate having vertically extending channels thereon and terminating at a first horizontal plate, a second vertical plate slidingly held in said channels, said second vertical plate having a horizontal shelf thereon for holding said motor, spring mount means for attaching said shelf to said horizontal plate, means including a threaded shaft rotatably driven by said motor in either of two opposite directions for raising and lowering said window, said threaded shaft being axially stationary, pressure sensitive switches under said window for stopping the movement of said window when an object is in the path of said window while closing, limit switch means operated responsive to a depression of said spring mount means for stopping said motor, and said window raising and lowering means including said threaded shaft comprising a second horizontal plate attached to the top of said window, said second horizontal plate having horizontal guide means, a thread engaging plate mounted for horizontal movement in said horizontal guide means for threadedly engaging said threaded shaft to raise and lower said window responsive to the rotation of said threaded shaft.