Abstract: A building sprinkler system includes a pump having an input for receiving water and an output that is connected to selectively feed a plurality of sprinkler heads. A driver is operatively connected to the pump for driving the pump. A cooling arrangement is provided for cooling the pump during pump testing operations. The cooling arrangement includes: a heat exchanger with a primary loop formed by a flow path for delivering water from the output of the pump through the heat exchanger and back to the input of the pump, and a secondary loop formed by a flow path for delivering coolant from the heat exchanger through a radiator and back to the heat exchanger so that heat is transferred from the water to the coolant via the heat exchanger and from the coolant to air via the radiator.

Abstract: An apparatus for coupling a tag trailer to a towing vehicle includes first and second elongate linkages each having respective first and second ends. The first ends are coupled with respective coupling structures on the towing vehicle, and the second ends are pivotally coupled with a tow support at respective first and second positions such that the first and second linkages are angled with respect to one another to define an instant center of rotation between the towing vehicle and the trailer at a location spaced from the first and second coupling structures on the trailer.

Abstract: A building sprinkler system includes a pump having an input for receiving water and an output that is connected to selectively feed a plurality of sprinkler heads. A driver is operatively connected to the pump for driving the pump. A cooling arrangement is provided for cooling the pump during pump testing operations. The cooling arrangement includes: a heat exchanger with a primary loop formed by a flow path for delivering water from the output of the pump through the heat exchanger and back to the input of the pump, and a secondary loop formed by a flow path for delivering coolant from the heat exchanger through a radiator and back to the heat exchanger so that heat is transferred from the water to the coolant via the heat exchanger and from the coolant to air via the radiator.

Abstract: A building sprinkler system includes a pump that feeds a plurality of sprinkler heads. A driver is operatively connected to the pump for driving the pump. A speed control is responsive to suction pressure at a suction side of the pump. The speed control is configured to reduce driver speed when the suction pressure falls below a set threshold pressure value to maintain the suction pressure above the set threshold pressure value.

Abstract: A sprinkler system for building includes an internal combustion engine which operates a water pump. The water pump in turn forces water through pipes to sprinkler heads. The engine is at least in part controlled by a throttle control mechanism which includes a spring biased piston which is moved in response to the output pressure of the pump. This prevents the pump from exceeding the rated pressure of the system components.

Abstract: A sprinkler system for building includes an internal combustion engine which operates a water pump. The water pump in turn forces water through pipes to sprinkler heads. The engine is at least in part controlled by a throttle control mechanism which is responsive to pressure.

Abstract: A sprinkler system for building includes an internal combustion engine which operates a water pump. The water pump in turn forces water through pipes to sprinkler heads. The engine is at least in part controlled by a throttle control mechanism which is responsive to pressure.

Abstract: The stop control for an organ console comprises a panel including groups of touch sensitive switches disposed in pairs with an adjacent indicating lamp, wherein the switches of a pair respectively actuate and deactuate a given stop while the lamp indicates whether the stop is actuated. The switches of a pair are connected to set and reset terminals of a latching circuit which provides an output for energizing the indicating lamp and for controlling appropriate stop circuitry in the organ. The touch sensitive switches are disposed in groups according to the organ manual or function to which the corresponding stops pertain. A general cancel switch returns the various latching circuits to a reset condition. A transposer control circuit includes a plurality of switches and adjacent indicating lamps wherein the depression of a particular switch operates a latching circuit and resets other latching circuits associated with the transposer.