Abstract: Provided is a backwash valve comprising a body including a central tube extending along a length of the body, a first pool port and first filter port axially aligned at a first position along the body length, a second pool port and second filter port axially aligned at a second position along the body length, and a waste port; and a sliding gate including a stem connected to a gate body, the gate body including first and second chambers separated by an internal wall; the sliding gate movable between a filter position wherein fluid communication is provided among the first filter port, first chamber, and first pool port, and a backwash position wherein fluid communication is provided among the first filter port, second fluid chamber, and second pool port, and between the second filter port and waste port.

Abstract: Provided is a backwash valve comprising a body including a central tube extending along a length of the body, a first pool port and first filter port axially aligned at a first position along the body length, a second pool port and second filter port axially aligned at a second position along the body length, and a waste port; and a sliding gate including a stem connected to a gate body, the gate body including first and second chambers separated by an internal wall; the sliding gate movable between a filter position wherein fluid communication is provided among the first filter port, first chamber, and first pool port, and a backwash position wherein fluid communication is provided among the first filter port, second fluid chamber, and second pool port, and between the second filter port and waste port.

Abstract: Sequences of items may be maintained using ordered locks. These items may correspond to anything, but using ordered locks to maintain sequences of packets may be particularly useful. One implementation uses a locking request, acceptance, and release protocol. One implementation associates instructions with locking requests such that when a lock is acquired, the locking mechanism executes or causes to be executed the associated instructions as an acceptance request of the lock is implied by the association of instructions (or may be explicitly requested). In some applications, the ordering of the entire sequence of packets is not required to be preserved, but rather only among certain sub-sequences of the entire sequence of items, which can be accomplished by converting an initial root ordered lock (maintaining the sequence of the entire stream of items) to various other locks (each maintaining a sequence of different sub-streams of items).

Abstract: The present invention is directed to a heterodyne reflectometer system and method for obtaining highly accurate phase shift information from heterodyned optical signals, from which extremely accurate film depths can be calculated. A linearly polarized light comprised of two linearly polarized components that are orthogonal to each other, with split optical frequencies, is directed toward a film causing one of the optical polarization components to lag behind the other due to an increase in the optical path in the film for that component. A pair of detectors receives the beam reflected from the film layer and produces a measurement signal, and the beam prior to incidence on the film layer and generates a reference signal, respectively. The measurement signal and reference signal are analyzed by a phase detector for phase shift. The detected phase shift is then fed into a thickness calculator for film thickness results.

Abstract: A truck steer tire 10 has a side groove 24, 240 that extends laterally inwardly from the treadwall 29 in a circumferentially continuous fashion. The side groove 24, 240 lies between the tread surface 26 and the belt reinforcing structure 15. The side groove 24, 240 has a minimum groove (w) of 5 mm or greater and a groove depth to width ratio of 1.0 to 2.4. The groove 24, 240 preferably has a groove base having a radiused profile R, the radially inner portion of R being at least equal to one-half the minimum groove width (w).

Abstract: A power meter includes components to measure RMS power over an 84 dB range or greater using the I-V square-law relation of a diode for measurements. The power meter includes multiple diodes along with a power distribution manifold which includes power dividers to distribute an input signal to the diodes. In one embodiment, a first power divider (202) distributes power to a first one of the diodes (203), and to the second power divider (204) which distributes power to the second (210) and third (212) diodes. The first power divider (202) is connected without attenuation to the first diode (203). The second power divider (204) is connected to the second diode (210) through a 11 dB attenuator (206), and to the third diode (212) through a 28 dB attenuator (208).

Abstract: A loading dock door seal structure wherein compressible members or pads are located adjacent the top and sides of the door to engage the rear end of a truck cargo body that is backed into loading and unloading position. The pads serve to provide a seal, however, they are spaced outwardly away from the wall of the building adjacent the door frame to leave gaps. Brackets are provided at the top and sides of the door frame and secured thereto, but extend outward and have lateral legs parallel to the building wall that serve as a mount for the seal pads. The brackets also have longitudinal legs extending perpendicular to the doorframe and outwardly therefrom in the gap between the pads and the doorframe. Flexible fabric seal strips are secured to the longitudinal legs of the bracket to close the gaps between the pads and the wall building.

Abstract: Dental cream effective in promoting oral hygiene containing an amine fluoride, insoluble alkali metal metaphosphate polishing material, an aqueous humectant phase including at least one of glycerine and sorbitol and a solid phase containing non-ionic cellulosic gelling agent, wherein polyethylene glycol of average molecular weight of about 200-1000 is present to stabilize the dental cream against phase separation.

Abstract: Astringent dentifrice containing a water-soluble zinc salt and a hydrous silica gel polishing agent compatible and substantially non-reactive with the zinc salt.

Abstract: Astringent gel dentifrice containing a water-soluble zinc salt, a hydrous silica gel polishing agent compatible and substantially non-reactive with the zinc salt and alkali metal carboxymethyl cellulose.

Abstract: Astringent dentifrice containing a water-soluble zinc salt and alkali metal monofluorophosphate and a hydrous silica gel polishing agent compatible and substantially non-reactive with each of the zinc salt and the alkali metal monofluorophosphate.

Abstract: Dentifrice containing a liquid vehicle containing water, a gelling agent, a dual source of at least about 500 ppm of fluorine comprising sodium fluoride and sodium monofluorophosphate, a precipitated, amorphous silica gel having an average particle size of 1 to 30 microns and(a) a surface area of 1 to 600 m.sup.2 /g,(b) a pore volume of 0.05 to 0.5 cm.sup.3 /g,(c) a product of surface area (in m.sup.2 /g).times.pore volume (in cm.sup.3 /g) less than or equal to 240,(d) a calculated pore diameter of 1.5 to 2.5 nm, and(e) a water content of less than 25% by weight, a source of calcium corresponding to up to about 0.004% by weight (40 ppm) of calcium ion and about 0.25%-5% by weight of an alkali metal phytate. The alkali metal phytate improves retention of total soluble fluorine.

Abstract: There is disclosed a dentifrice formulation which is stable in the sense of not producing gassing as evidenced by visually discernable distention over a period of 168 days at 43.degree. C. in an unlined aluminium tube.The formulation comprises an aqueous dentally acceptable oral vehicle at least 27.5% by weight of the dentifrice comprising water and dispersed in the said oral vehicle from 10 to 40% by weight of the dentifrice of a neutral siliceous polishing agent having a stirred slurry pH (as herein defined) in the range from 6.5 to 7.5, and a stabilizing amount of monofluorophosphate ion, the dentifrice having a stirred slurry pH in the range from 5.5 to 8.

Abstract: A visually clear pigmented dentifrice in which a color-intensive conjugated pigment, such as a phthalocyanine is dispersed homogeneously throughout the clear dentifrice. The dentifrice is characterized as retaining color without substantial fading and with retention of clarity.

Abstract: A dental cream of desirable rheological properties containing a hydrated alumina polishing material and high viscosity hydroxyethyl cellulose gelling agent.

Abstract: Dentifrices containing chloroform and a siliceous agent have been found to cause instability and corrosion in unlined aluminium tubes. A chloroform/siliceous agent dentifrice formulation is disclosed wherein an additive comprising a mixture of phosphate esters is used to reduce or prevent corrosion and thus provide stability.

Abstract: A visually clear pigmented dentifrice in which a color-intensive conjugated pigment, such as a phthalocyanine is dispersed homogeneously throughout the clear dentifrice. The dentifrice is characterized as retaining color without substantial fading and with retention of clarity.

Abstract: There is disclosed a dentifrice formulation which is stable in the sense of not producing gassing as evidenced by visually discernable distention over a period of 168 days at 43.degree. C. in an unlined aluminium tube.The formulation comprises an aqueous dentally acceptable oral vehicle at least 27.5% by weight of the dentifrice comprising water and dispersed in the said oral vehicle from 10 to 40% by weight of the dentifrice of a neutral siliceous polishing agent having a stirred slurry pH (as herein defined) in the range from 6.5 to 7.5, and a stabilizing amount of monofluorophosphate ion, the dentifrice having a stirred slurry pH in the range from 5.5 to 8.

Abstract: There is disclosed a dentifrice formulation which is stable in the sense of not producing gassing as evidenced by visually discernable distention over a period of 168 days at 43.degree. C. in an unlined aluminum tube.The formulation comprises an aqueous dentally acceptable oral vehicle at least 27.5% by weight of the dentifrice comprising water and dispersed in the said oral vehicle from 10 to 40% by weight of the dentifrice of a neutral siliceous polishing agent having a stirred slurry pH (as herein defined) in the range from 5 to less than 6.5, and a stabilizing amount of monofluorophosphate ion, the dentifrice having a stirred slurry pH in the range from 5.5 to 8.

Abstract: A dental cream of desirable rheological properties containing a hydrated alumina polishing material and high viscosity hydroxyethyl cellulose gelling agent.