Abstract: An apparatus for a gate valve between chambers includes a valve housing defining a flow path. A male valve portion is rotatable on a fixed axis in the housing. The male valve portion including a first male mating surface positioned at a first angle less than perpendicular to the axis. A female valve portion is fixed in the valve housing for receiving the male portion. The female valve portion including a first female mating surface positioned at a second angle matching the first angle. An o-ring seals the male valve portion to the female valve portion when the male valve portion is rotated into the female valve portion. A polished surface contacts the o-ring when the male valve portion is rotated. When the male valve portion is rotated into the female valve portion the o-ring is compressed thereby sealing the gate valve and closing the flow path.

Abstract: An apparatus for a gate valve between chambers includes a valve housing defining a flow path. A male valve portion is rotatable on a fixed axis in the housing. The male valve portion including a first male mating surface positioned at a first angle less than perpendicular to the axis. A female valve portion is fixed in the valve housing for receiving the male portion. The female valve portion including a first female mating surface positioned at a second angle matching the first angle. An o-ring seals the male valve portion to the female valve portion when the male valve portion is rotated into the female valve portion. A polished surface contacts the o-ring when the male valve portion is rotated. When the male valve portion is rotated into the female valve portion the o-ring is compressed thereby sealing the gate valve and closing the flow path.

Abstract: A variable air flow volume conditioned air distribution system of the kind having an air flow duct for supplying conditioned air to a room and a valve in the duct for regulating the volume of air flowing through the duct has a controller which senses the flow velocity in the duct and the room temperature in the room.The controller combines a temperature signal with a flow velocity signal through a velocity spring. A temperature change resets the flow velocity set point and produces a corresponding change in the volume flow through the duct.The controller includes an adjustable bias for the velocity spring for varying the rate of the velocity spring from a low spring rate for control at a low maximum permitted flow velocity in the duct to a higher spring rate for control at a higher permitted maximum flow velocity flow in the duct and vice versa.

Abstract: An air flow velocity controller in a variable air volume control system interlocks a room temperature signal from a thermostat with the velocity set point so that the velocity controller maintains a constantly regulated amount of air into a room in proportion to the room's thermostat demands and independent of variations in the static pressure in the duct.The controller includes a maximum lift cam and a movable spring fulcrum which are both mounted in a common cam housing to permit the maximum velocity setting to be adjusted for varying room requirements while maintaining a constant spring range regardless of the maximum velocity setting.The controller is constructed to provide automatic compensation for control offset produced by changes in the static air pressure in the duct.The controller includes the ability to control the air flow at a minimum velocity so that the air can be economically reheated or a minimum volume of air flow can be maintained for ventilation requirements.

Abstract: A dual duct variable volume air conditioning system has a first, cold duct for supplying cold air and a second, reset duct for supplying either hot air in a first mode of operation or cold air in a second mode of operation. A self-contained system regulator positions first and second valves in the first and second ducts in response to changes in room temperature. The regulator is effective to reverse the direction of response of the second valve to temperature in the second mode of operation from the direction of response of that valve to a similar temperature change in the first mode of operation so that the reset duct can be used as a hot duct with the system supplying warm or cold air on demand in the heating season (without mixing) and as a cold duct to double the cooling capacity of the system in the cooling season.

Abstract: An apparatus for spray washing the interior of vessels includes a body member secured to a fluid supply line, and a housing rotatably secured to the body and in flow communication therewith. A hub is rotatably secured to the housing on an axis transverse to the body-housing axis, and a plurality of nozzles extend radially from the hub perpendicular to the hub axis. A pair of reaction jets also extend radially from the hub to drive the hub in an oscillating motion. The hub is secured to a spindle which is joined to a lever which operates an over center toggle. The toggle operates a valve which alternates the fluid flow to the reaction jets to produce the oscillating hub motion. The lever also drives a ratchet mechanism which incrementally rotates the housing about the body member.

Abstract: Air flow volume in a delivery duct is sensed in the form of changes in duct pressure and the sensed pressure is fed back to a diaphragm assembly which is part of a thermostatic control located in the room to which hot or cold air is being delivered. Dependent upon the sensed pressure, the diaphragm assembly throttles a bleed opening in the supply line of a pneumatic actuator, which actuator determines the position of a damper in the duct to thereby control the volume of air flow in the duct. A bellows is also part of the thermostatic control and senses room temperature to establish a spring force on the diaphragm assembly and against which the sensed pressure must act. The bellows is adjustable to afford room temperature selection. The bellows and a compression spring act on a master lever, the compression spring reacts against the bellows force.

Abstract: A selective imprinting machine of the type used for addressing mailed material, utilizing embossed card-sized media of the "credit-card" type having a matrix of perforations sensed for comparison against the master. The master is another perforated card with the perforations on both cards photoelectrically sensed. In one embodiment the cards move along a linear path, and in another they are carried on a rotating drum which also bears the master card. The media are placed on the drum by a rocker arm actuated by a cam driven by the drum, scanned simultaneously with the master for comparison and ejected tangentially from the drum to a receiver. A print signal is produced until inhibited by mismatch between the master and the individual embossed media. The elected media are imprinted against a receiving medium such as an envelope by a print roller, at the periphery of the drum, urged toward the periphery by a cam driven by the drum.

Abstract: A dual duct variable volume air conditioning system has a first, cold duct for supplying cold air and a second, reset duct for supplying either hot air in a first mode of operation or cold air in a second mode of operation. A self-contained system regulator positions first and second valves in the first and second ducts in response to changes in room temperature. The regulator is effective to reverse the direction of response of the second valve to temperature in the second mode of operation from the direction of response of that valve to a similar temperature change in the first mode of operation so that the reset duct can be used as a hot duct with the system supplying warm or cold air on demand in the heating season (without mixing) and as a cold duct to double the cooling capacity of the system in the cooling season.