Back to results
US 4,068,799 AGranted
Automatic ventilation regulating device for windows, doors and the like
OwnerEric Brodininventor
Life of this patent
Estimating the term…
Abstract
An automatic ventilation regulating device for windows, doors and the like, which have a movable portion and a fixed portion, including a spindle; a slide displaceable on the spindle; driving means for displacing the slide on the spindle, the spindle and the slide being connectable with the movable and fixed portions, respectively; and a settable thermostat arranged for controlling the operation of the driving means in response to the temperature in the room to be ventilated.
Claims5
An automatic ventilation regulating device for windows, doors and like having an openable portion and a fixed portion, said device including:
- a threaded spindle rotatably mounted;
- a slide displaceable on said spindle when said spindle is rotated, said spindle being pivotally connected with one portion and said slide being pivotally connected with the other portion;
- and means to automatically vary the degree to which the window or door is opened in response to temperature, said means comprising intermittently operated motor means for rotating said spindle for short periods, and a settable thermostat for controlling the operation of said motor means to drive said motor means intermittently for short periods in response to the temperature in the ventilated room.
Dependencies are inferred from the claim text.