Abstract: A gas leak sensor system detects the presence of gas leaking into any one of a plurality of test spaces for example, refrigeration gas into a refrigeration case. A plurality of tubes extend from each of the test spaces to a sensor location whereat a selector valve is connected to each tube. A controller actuates the selector valves to select tubes in a particular order and a vacuum source draws air and any leaking gas through a selected tube and through a gas sensor to activate an alarm. The gas sensor is purged at least each time a leaking gas has been sensed.

Abstract: Multiple embodiments of a construction for exerting a force substantially along the longitudinal axis of a roll of paper towels supported between two side arms of a paper towel holder. The longitudinal force urges the side arms outwardly toward their maximum deflection point to increase the stability of the holder. Each end of the constructions includes a cylindrical portion that fits over each bearing member of the side arms. The longitudinal force is created by either a spring inserted within the core of a roll of paper towels, or a bellows portion of the construction. Each bellows portion is made of a thermoplastic material having sufficient elastic properties to create the longitudinal forces.

Abstract: An adjustable valve nozzle assembly is provided wherein a partially circular male body is disposed in a socket of a female body so that conduits in each of the bodies may be in fluid communication. A nozzle is mounted in the male body, with the fluid inlet being in the female body. A gasket is provided in the female body for sealing between the socket and the partially circular male body. The socket has an adjustment opening larger than and receiving an extending neck on the male body for permitting angular adjustment of the nozzle in all directions, and a slot extends along a diametral plane from the opening in the socket to form a keyhole-shaped slotted aperture to receive the neck and for permitting the nozzle to be rotated at least about 45 degrees relative to the female body for a shut-off or trickle-flow condition of the valve nozzle assembly.

Abstract: A refrigerant transducer assembly has a housing with first and second interconnected openings, and the first opening is adapted to be installed in a refrigeration system for connection to the fluid presesure to be measured. A cartridge is threaded into the second opening, and within the cartridge is a pressure transducer in a transducer chamber. The pressure transducer may need servicing and, to do so, the cartridge is unthreaded from the housing, with the initial unthreading closing a first valve controlling fluid flow between the first and second openings. Conversely, as the cartridge is reinstalled on the housing, the final threading during tightening opens the first valve. This minimizes leakage of refrigerant to atmosphere for servicing. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: A gas nozzle has a body threaded on a threaded conduit with an insert therebetween. This insert is not changed for another insert in order to adapt the nozzle to either natural gas or LP gas; instead, the body is tightened onto the insert and threaded conduit for LP gas and is loosened about one thread for natural gas. The insert has a first restricted orifice and a bypass passageway around this restricted orifice. The body has a second restricted orifice which is larger than that of the first restricted orifice. Thus, when the body is tightened on the conduit, a seal is made to close off the bypass passageway and the gas flow is through the first and second restricted orifices in series. When the body is loosened, the bypass passageway comes into effect and the gas flow is also through the bypass passageway to be restricted only by the second restricted orifice.

Abstract: An adjustable valve nozzle assembly is provided wherein a partially circular male body is disposed in a socket of a female body so that conduits in each of the bodies may be in fluid communication. A nozzle is mounted in the male body, with the fluid inlet being in the female body. A gasket is provided in the female body for sealing between the socket and the partially circular male body. The socket has an adjustment opening larger than and receiving an extending neck on the male body for permitting angular adjustment of the nozzle in all directions, and a slot extends along a diametral plane from the opening in the socket to form a keyhole-shaped slotted aperture to receive the neck and for permitting the nozzle to be rotated at least about 45 degrees relative to the female body for a shut-off or trickle-flow condition of the valve nozzle assembly.

Abstract: An outdoor temperature sensing assembly includes a temperature sensor such as a thermocouple having a given length mounted inside a thermal mass of low thermal conductivity. This thermal mass is mounted on a mounting plate and shielded by an upper wall, two side walls, and an end wall for free air circulation through the open bottom of the shield yet the shield protects the temperature sensor and thermal mass from sun, wind and rain.

Abstract: A tube fitting assembly includes a tube and first and second threaded fitting members with first and second lateral shoulders, respectively. A plurality of deformed areas, shown as two in number, are provided from the wall of the tube by axial compression. This establishes first and second beads with at least the second bead being an annular bead to cooperate with the second shoulder. When the two fitting members are threaded together, this axially compresses the plural beads so that a seal is formed between the second annular bead and the second shoulder on the second fitting member. The large extent to which the deformed areas may be axially compressed assures a good fluidtight seal despite the variable amount of torque applied to the fitting members. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: A duct mount sensor assembly includes a condition sensor such as a temperature sensor mounted in the distal end of a sensor tube and the proximal end thereof is secured to a mounting plate. A cover on the opposite surface of the mounting plate covers any electrical connections to conductor wires from the sensor. Threaded fasteners such as sheet metal screws secure the cover and the mounting plate and also secure both to a duct wall. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: Apparatus in the form of a shower head to aerate water is disclosed. An uninterrupted and uniform spray pattern is achieved by utilizing a terminating wall for the coaxial aperture of the nozzle and an end wall for the nozzle downstream of the terminating wall. The terminating wall is separated from the end wall by an annular moat and is radially inboard and upstream from the end wall so that it is physically protected against damage, especially at the annular intersection between the coaxial aperture and the end wall. This annular intersection is made a very sharp angle, chamfered no more than 0.003 inch, to achieve this uniform spray pattern, yet the end wall downstream thereof protects it against physical damage to maintain this uniform spray pattern and to protect the user of the shower head against injury from cuts.

Abstract: A tube coupling with only a body and a threaded member is disclosed, the threaded member usually being a nut to overlie an outer sleeve and an inner sleeve unitary with the body. These two sleeves define therebetween an annular groove to receive the end of the tube. The method of tightening the nut onto the body provides that a generally conical cam surface on the nut interacts with a shallower taper conical cam follower surface on the outer sleeve to force this cam follower surface radially inwardly and longitudinally inwardly forming annular radially inward bulges on the outer and inner sleeves and on the tube trapped therebetween. This interlocks the tube with the coupling, and provides a fluid seal at three different places, the inner wall of the tube, the outer wall of the tube, and the end of the tube at the bottom of the groove.

Abstract: A tube fitting assembly is disclosed wherein a ductile metal tube is forced into first and second orifices within a fitting. The tube is closely received within the first orifice and the second orifice is larger so that the axial force on the tube axially contracts the tube to form a radially expanded bead on the tube substantially filling the second orifice. This establishes a fluid tight seal between the tube and the fitting and also retains the tube in the fitting. An annular deformable seal member is also provided between an outer surface of the tube and an inner surface of the fitting and this seal may be a rubber-like O-ring or a composition material which is more yieldable than the material of the tube and fitting, may be set up from a liquid or plastic sealant material, or may be a deformable wall of the fitting.

Abstract: A joint is provided between one tube and another tube without the necessity of a heavy thick-walled metal coupling. The joint includes first and an optional second enlarged portions on a first tube with the second enlarged portion near an end of the second tube. A first shoulder is provided between the first enlarged portion and the main body of the first tube. A second annular shoulder is provided at the junction between the first and second enlarged portions. The end of the second tube slips into the first enlarged portion of the second tube and the second tube is then axially compressed so as to form an annular bead which acts against and is contained by the second enlarged portion of the first tube. This axial compression provides both a mechanical interconnection so that the tubes will not axially separate despite fluid pressure or mechanical force, and also provides a fluid tight seal at the annular bead and the second shoulder or second enlarged portion.

Abstract: A tube fitting assembly is disclosed wherein a ductile metal tube is forced into first and second orifices within a fitting. The tube is closely received within the first orifice and the second orifice is larger so that the axial force on the tube axially contracts the tube to form a radially expanded bead on the tube substantially filling the second orifice. This establishes a fluid tight seal between the tube and the fitting and also retains the tube in the fitting. An annular deformable seal member is also provided between an outer surface of the tube and an inner surface of the fitting and this seal may be a rubber-like O-ring or a composition material which is more yieldable than the material of the tube and fitting, may be set up from a liquid or plastic sealant material, or may be a deformable wall of the fitting.

Abstract: A sleeve is used in a tubing joint assembly method, usually an inner sleeve, with a tube telescoped over this inner sleeve. An outer sleeve may optionally be telescoped over the tube and the entire assembly. One of the sleeves has a lateral shoulder transverse to the axis of the sleeve and with this shoulder terminating in a sharp angled peripheral rib. The outer sleeve is inwardly compressed by two dies which have interdigitated teeth. This compresses the outer sleeve, where used, and compresses the tube at the peripheral ribs of the sleeve. The interdigitated teeth on the dies assure complete compression all the way around the periphery, between the tube and the sleeve with a lateral shoulder being formed on the tube to act against the lateral shoulder on the sleeve and thus longitudinally retain together these parts. Also, a fluid pressuretight seal is established primarily at the sharp angled peripheral rib and its junction with the facing wall of the tube.

Abstract: A sleeve is used in a tubing joint assembly, usually an inner sleeve, with a tube telescoped over this inner sleeve. An outer sleeve may optionally be telescoped over the tube and the entire assembly. One of the sleeves has a lateral shoulder transverse to the axis of the sleeve and with this shoulder terminating in a sharp angled peripheral rib. The outer sleeve is inwardly compressed by two dies which have interdigitated teeth. This compresses the outer sleeve, where used, and compresses the tube at the peripheral ribs of the sleeve. The interdigitated teeth on the dies assure complete compression all the way around the periphery, between the tube and the sleeve with a lateral shoulder being formed on the tube to act against the lateral shoulder on the sleeve and thus longitudinally retain together these parts. Also a fluid pressure tight seal is established primarily at the sharp angled peripheral rib and its junction with the facing wall of the tube.

Abstract: An inner sleeve is used in a tubing joint assembly with this inner sleeve having a lateral shoulder generally perpendicular to the axis of the sleeve and with this shoulder terminating in a sharp angled peripheral rib. A tube is telescoped over this inner sleeve. An outer sleeve may optionally be telescoped over the tube and the entire assembly inwardly compressed by two dies which have interdigitated teeth. This compresses the outer sleeve, where used, and compresses the tube onto the peripheral ribs of the inner sleeve. The interdigitated teeth on the dies assure complete compression all the way around the periphery of the tube onto the inner sleeve with a lateral shoulder being formed on the tube to act against the lateral shoulder on the inner sleeve and thus longitudinally retain together these parts. Also a fluid pressure tight seal is established primarily at the sharp angled peripheral rib and its junction with the inner wall of the tube.

Abstract: A joint is provided between one tube and another tube without the necessity of a heavy thick-walled metal coupling. The joint includes first and an optional second enlarged portions on a first tube with the second enlarged portion near an end of the second tube. A first shoulder is provided between the first enlarged portion and the main body of the first tube. A second annular shoulder is provided at the junction between the first and second enlarged portions. The end of the second tube slips into the first enlarged portion of the second tube and the second tube is then axially compressed so as to form an annular bead which acts against and is contained by the second enlarged portion of the first tube. This axial compression provides both a mechanical interconnection so that the tubes will not axially separate despite fluid pressure or mechanical force, and also provides a fluid tight seal at the annular bead and the second shoulder or second enlarged portion.

Abstract: A tube fitting assembly is disclosed comprising a fitting having a first orifice through a portion of the fitting and a second orifice larger than the first orifice and coaxial with and through a portion of the first orifice. The second orifice extends from an outside surface of the fitting. One of the first and second orifices contains a shoulder defining areas of different cross-sectional areas within that orifice. The shoulder includes a shoulder surface facing axially inwardly relative to the outside surface of the fitting. A tubing having a diameter substantially equal to the first orifice occupies the first and second orifices with a first deformed portion formed from a radially expanded tubing wall engaging the other of the first and second orifices.

Abstract: An inner sleeve is used in a tubing joint assembly with this inner sleeve having a lateral shoulder generally perpendicular to the axis of the sleeve and with this shoulder terminating in a sharp angled peripheral rib. A tube is telescoped over this inner sleeve. An outer sleeve may optionally be telescoped over the tube and the entire assembly inwardly compressed by two dies which have interdigitated teeth. This compresses the outer sleeve, where used, and compresses the tube onto the peripheral ribs of the inner sleeve. The interdigitated teeth on the dies assure complete compression all the way around the periphery of the tube onto the inner sleeve with a lateral shoulder being formed on the tube to act against the lateral shoulder on the inner sleeve and thus longitudinally retain together these parts. Also a fluid pressure tight seal is established primarily at the sharp angled peripheral rib and its junction with the inner wall of the tube.