Improvements in means for opening and closing slidable windows, shutters and other panels

摘要

487,893. Sliding-window &c. regulators. SLEIGH, H. L., CHESTON, A. S., and OLDHAM, F. A. M. Jan. 22, 1937, No. 1886. [Class 20 (iii)] An hydraulic transmission system for operating sliding windows, shutters, and the like, comprises a pressure-producing cylinder connected by one or more valveless conduits to one or more pressure-receiving piston- and-cylinder devices connected to the window, the pressure-producing cylinder containing a piston device operated by a handle through irreversible gearing or driving mechanism. In the construction shown, means are provided whereby positive opening and closing of the window is obtained, and comprises two pistons 14, 15, connected. by a threaded spindle 13 which engages with an internally-threaded nut 11 integral with or secured to a bevel pinion 10 which may be operated by a suitable handle, to cause the pistons to move within hydraulic cylinders 16, 17. A rod 36, carrying a piston 35 movable within a cylinder 29 in the vertical frame member, is attached. to each side of the window panel 1, the under surface of each piston communicating by a conduit 23 with one end of the cylinder 16, and the upper surface of each piston communicating by a conduit 28 with one end of the cylinder 17. Pressure is applied by the piston 14 to the under surfaces of the pistons 35 to raise the window, and is applied to the upper surfaces of the pistons by the piston 15 to lower the window. If desired, the piston 15 and its associated pipes may be omitted, the window being lowered by gravity assisted by the vacuum which is created when the lifting piston 14 is retracted. The space between the pistons 14, 15, may constitute or be connected to a chamber containing a reserve supply of nuid for replenishing leakage losses, each piston being furnished with a one-way valve which opens on the return or inward stroke, to permit fluid to pass from the reserve chamber.