摘要:
A tool for gripping the circumferential outer surface of a pipe or rod and comprising a pair of diametrically opposed arcuate shoes each with a ball cage having a plurality of balls retained by the cage. The shoes have ramped surfaces upon which the balls will run so that when the shoes are rotated about the central longitudinal axis of the pipe or rod the balls become trapped between the ramp surfaces and the surface of the pipe or rod, to grip same. Reverse rotation releases the tool. The rolling action imposed by the balls on the pipe or rod, whilst gripping same, avoids the creation of sharp burrs on the surface of the pipe or rod thus helping to prevent corrosion.
摘要:
A system for sealing a packaging wrapper around an object directs a flow of heated air to end flaps of the wrapper to move the end flaps into sealing contact with a body section of the wrapper to substantially enclose the object. The system includes an oven, a conveyor, a source of heated air and a means for deflecting the flow of heated air to the conveyor to seal end flaps of the wrapper with a body section of the wrapper. In use, an object surrounded by the wrapper body section is moved through the oven on a conveying surface of the conveyor, and heated air is moved through the oven bypassing the conveying surface to a region below the conveying surface. The heated air flow then encounters the means for deflecting the heated air flow, which directs the air flow upward and through the conveying surface to impact and move the end flaps into sealing contact with the wrapper body section.
摘要:
A filter element (28) having planar (48) or cavity (30) geometry having applied thereto a coating (38, 39, 50, 53) of temperature super conducting (I-ITS) material characterised in that said filter element (28) or said coating of HTS material is provided with a porous structure (49A) or has associated therewith a plurality of cooling passages (29, 40, 42, 55) for passage of refrigerant when said filter element (28) is connected to a refrigeration circuit. The invention also includes a refrigeration circuit having a compressor (18) connected to a heat exchanger assembly (19) located in an evacuated housing (20) wherein the heat exchanger assembly (19) comprises an influent line (22), a first heat exchanger unit (21) in communication with the influent line (22), a throttle valve (23) which is in communication with the filter (28), a second heat exchanger unit (25) in communication with the filter (28) and a return line (26) to the compressor (18).
摘要:
A digital circuit generates very precise clock frequencies for applications that can tolerate a small degree of jitter but require exact long term frequencies, e.g. a video clock for a laser printer. Some subpixel jitter is acceptable, but the overall pixel rate remains exact and consistent. In some applications, the jitter may be desirable to smear the EMI spectrum. For example, if the high frequency input clock is modulated, the edges of the video clock will also be modulated yet remain within the jitter and frequency specification.
摘要:
The fluid delivery/refilling system includes a unit-of-use fluid reservoir for dentifrice or medication within a head portion of a power toothbrush, which is removable from the remainder thereof. A pump element is located in the brushhead and is configured so that the back and forth movement of the brushhead in operation results in fluid moving from the reservoir to a dispensing valve located in the brushhead. The dispensing valve has an end portion which is normally closed, opening under pressure of fluid from the pump. The refilling assembly is separate from the toothbrush and is configured to fit over the top of the toothbrush. Upward pressure exerted on the toothbrush when the toothbrush is within the refilling assembly results in movement of a core element in the refilling assembly, which in turn results in a hollow needle in the refilling assembly extending into a refiller valve in the head portion of the toothbrush. This results in a fluid path between the refilling assembly and the reservoir in the toothbrush. A selected sequence of movement of the toothbrush relative to the refilling results in fluid being moved from the external reservoir through the needle into the on-board unit-of-use reservoir in the toothbrush.
摘要:
The fluid delivery/refilling system includes a unit-of-use fluid reservoir for dentifrice or medication within a head portion of a power toothbrush, which is removable from the remainder thereof. A pump element is located in the brushhead and is configured so that the back and forth movement of the brushhead in operation results in fluid moving from the reservoir to a dispensing valve located in the brushhead. The dispensing valve has an end portion which is normally closed, opening under pressure of fluid from the pump. The refilling assembly is separate from the toothbrush and is configured to fit over the top of the toothbrush. Upward pressure exerted on the toothbrush when the toothbrush is within the refilling assembly results in movement of a core element in the refilling assembly, which in turn results in a hollow needle in the refilling assembly extending into a refiller valve in the head portion of the toothbrush. This results in a fluid path between the refilling assembly and the reservoir in the toothbrush. A selected sequence of movement of the toothbrush relative to the refilling results in fluid being moved from the external reservoir through the needle into the on-board unit-of-use reservoir in the toothbrush.
摘要:
A continuous process for producing a silicone polymer comprises the sequential steps of (i) polymerisation of a linear silanol group containing siloxane by condensation polymerisation, or of a cyclosiloxane by ring opening polymerisation, or of a mixture of said linear and cyclosiloxanes with a phosphazene base in the presence of water and the presence or absence of a filler in a static mixer, (ii) neutralising the reaction mixture in a static mixer, an in-line mixer or an extruder, and (iii) stripping the neutralised reaction mixture to remove volatile materials. Preferably step (ii) is performed in a static mixer and step (iii) is performed in a thin film stripper, extruder or co-rotating processor.
摘要:
Apparatus and a method are provided for converting a three pilot aircraft cockpit to a two pilot aircraft cockpit including relocating, without change, some control instruments from their existing positions to new instrument panels within reach of the remaining two crew members, the captain or pilot and first officer or copilot, modifying other control instruments for pilot workload reduction, and including the addition of a monitoring means to the cockpit for providing visual caution indicators responsive to caution indicators among the repositioned control instruments that are not within direct sight of the remaining two crew members.
摘要:
The invention provides novel compounds of Formulas (I)-(IV), as described herein. Also provided are compositions of these compounds, method of making the compounds, and methods of using the compounds. The compounds can be used to regulate cholesterol homeostasis and to treat conditions and diseases associated with cholesterol homeostasis, including lysosomal lipid storage disorders such as Niemann-Pick Disease type C.