Abstract: This gas hot water heater has a storage tank with a vertical flue having an elongated tube surrounding the flue to form an inverted inner tank that is closed at its top portion while being open at its bottom portion to the storage tank. A service water inlet pipe is located at the upper portion of the storage tank to discharge cold water into the upper portion of the inner tank to flow in a swirling direction down and around the outside of the flue. This downward swirling action of the cold service water relative to the upward flow of the hot flue gases within the flue tube represents the counterflow action. A thermostatic control valve is located through the wall of the upper portion of the inverted tank so as to open the valve to the inner tank when the water temperature within the inner tank reaches a normal, predetermined high temperature at a stand-by mode when no hot water is being drawn. Hence, the control valve is normally-open during high temperature stand-by conditions.

Abstract: An outside rescue elevator system is shown for use on a high-rise building. The elevator system can be installed on existing buildings, as well as being included in new construction. The system includes a dual compartment track mounted vertically on the outside of the building, and a wheeled truck operating within one of the track compartments, and a dual cable system is included with the truck for raising and lowering the truck within the track. A portable elevator cab is connected to the truck, and the cab includes a pair of stabilizing wheels, so that the cab actually rides on a smooth vertical roadbed that extends up the exterior wall of the building.

Abstract: A liquid-to-liquid heat exchanger particularly adapted for exchanging heat from hot waste water to cold supply water. In preferred form, the heat exchanger is of the inner pipe and outer shell type in which the outer shell is sub-divided into a serpentine flow path for the cold water, and in which the inner pipe is sized so that flow of the hot water liquid therethrough normally does not fill the pipe when the pipe is horizontally disposed. The outer shell's serpentine path is comprised of a first passageway located entirely beneath the normal flow of the hot water through the pipe, and dual second passageways located on either side of and parallel to the first passageway. Flow of the cold water in the outer shell commences through the first passageway, then splits and reverses directions through the dual second passageways, thereby providing optimum heat transfer between the hot and cold water when the pipe is less than full of hot water.

Abstract: A remote control cap that is adapted to snap fit onto a spray can's head, the cap being of a unitary or one piece molded plastic structure. The cap includes a lever arm connected to a snap-on collar by inherently resilient leaf springs, the leaf springs normally biasing the lever arm out of contact with the can's valve when the cap is assembled with the can. The cap also includes a pole socket connectable to an extension pole, and the lever arm is connectable to an extension cord at an end remote from the leaf spring end, thereby permitting the can's valve to be operated by depressing the lever arm against the leaf springs' bias from a position remote from the can.

Abstract: A centrifugal type fluid moving device having a rotor operating in a working chamber around it, wherein the working chamber is established by a plurality of working chamber defining modules each of which defines a "section" of overall working chamber. Each module presents an outlet for its respective section of the chamber. Both "tiered", or stacked, module sections, and "angular" module section embodiments are disclosed.