摘要:
A manual shift transmission having multiple input and output portions is provided with a control having input and output shift rails. A laterally movable control shaft extends axially through cutouts in respective shift rails and carries cams adapted to cooperate with cam follower surfaces on corresponding cutouts to effect rectilinear movement of the shift rails upon rotation of the control shaft. The cams are arranged on the shaft so that the shaft may be positioned to place respective cams in register with the input and output shift rails while all other cams are out of register with the rail cutouts. The shift movement of respective output and input shift rails is overlapped during the rotation of the control shaft to decrease the throw of the shift lever. The control shaft is spring biased to provide variable resistance in response to movement of a control lever to enable the operator to determine his position in the shift pattern of the transmission.
摘要:
A stir-in fluorescent lamp phosphor is coated with a 1:1 ratio of latex polymer and fumed silica. The polymer-coated fluorescent lamp phosphor exhibits improved dispersability and wettability in aqueous and organic binder media which are used to apply fluorescent lamp phosphors to the inside walls of a fluorescent lamp envelope.
摘要:
A silicon nitride based cutting tool is disclosed consisting essentially of in percent by weight about 5% aluminum oxide, about 6% yttrium oxide, from about 1.5% to about 5.5% silicon dioxide, and the balance silicon nitride, and having a density of at least about 99% of the theoretical density.
摘要:
A method and apparatus for drying low-rank coals, such as lignite, where the coal is passed through a sealed vessel in a plurality of heated fluidized beds, with fluidization effected by superheated steam flowing countercurrent to the coal flow. A composite steam is exhausted from the sealed vessel and passed to a vessel where water is sprayed therein to cool the same and remove occluded solids. A first portion of the steam is then reheated and returned to the sealed vessel as fluidizing steam, while a second portion of the steam is heated and passed through heat exchange tubes in the sealed vessel to heat the fluidizing coal, with the second portion, after passage through the heat exchange tubes discharged from the system.
摘要:
A method and apparatus for drying of low-rank coals, such as lignite, where the coal is passed through a sealed vessel in a plurality of heated fluidized beds with fluidization effected by superheated steam flowing counter-current to the flow of coal. A composite steam is exhausted from the sealed vessel, partially condensed, to remove an amount of water about equal to that removed from the coal, and the steam reheated and recycled to the sealed vessel. The heating of the fluidized beds is by means of heat exchange tubes passing through the beds, with a fluid, such as methanol, heated for flow through the tubes, collected and in a cooled state used in the partial condenser, and then compressed to reheat the same for reuse in the heat exchange tubes.
摘要:
Two new barium magnesium fluorides, Ba.sub.2 Mg.sub.3 F.sub.10 and BaMg.sub.3 F.sub.8, can be prepared by solid state reactions of barium fluoride and magnesium fluoride by heating in controlled atmospheric conditions at a temperature from about 700.degree. C to about 850.degree. C. In the BaF.sub.2 -MgF.sub.2 binary system, compositions containing from about 40 to 85 mole percent of MgF.sub.2 when activated by europium alone or in combination with manganese have been found to luminesce when excited by ultraviolet light, cathode rays, or with x-ray bombardment. Lamps incorporating these materials afford benefits of high temperature stability and x-ray intensifying screens incorporating these materials yield a speed equal to or better than present screens employing calcium tungstate.
摘要:
In combination with a transmission having a multiple input portion and a multiple output portion, each of which contains a plurality of speed change gears, is a shift control system having a plurality of fluid-pressure operated actuators that respond to movement of a preselector valve control member having a plurality of positions that correspond to separate ones of the drive ratios. Shift sensing means produce a first signal upon movement of the preselector valve control member whereas neutral position sensing means produce a second signal upon movement to neutral of the transmission input portion. A neutral sequence valve has a movable spool member maintainable in first and second alternate positions in response to the first and second signals, with mechanical interlock means, associated with the actuators, locking the transmission output portion in gear whenever the transmission input portion is in gear and locking the input portion in neutral whenever the output portion is in neutural. Details of the mechanical interlock means as well as shifting and interlocking methods are also set forth.
摘要:
A multi-cylinder compressor 10 particularly useful in connection with northern climate heat pumps and in which different capacities are available in accordance with reversing motor 16 rotation is provided with an eccentric cam 38 on a crank pin 34 under a fraction of the connecting rods, and arranged for rotation upon the crank pin between opposite positions 180.degree. apart so that with cam rotation on the crank pin such that the crank throw is at its normal maximum value all pistons pump at full capacity, and with rotation of the crank shaft in the opposite direction the cam moves to a circumferential position on the crank pin such that the overall crank throw is zero. Pistons 24 whose connecting rods 30 ride on a crank pin 36 without a cam pump their normal rate with either crank rotational direction. Thus a small clearance volume is provided for any piston that moves when in either capacity mode of operation.
摘要:
In the manufacture of sintered silicon nitride articles by hot isostatic pressing, multiple silicon nitride parts are encapsulated within a single capsule for the pressing operation. Suitable spacers placed between the parts ease separation thereof after sintering.
摘要:
In combination with a transmission having both multiple input and output portions, each of which contains a plurality of speed change gears, is a manual shift control system having pluralities of both input and output shift rails that are adapted to cooperate with input and output cam shafts that extend through shift rail input and output cam shaft cutouts, with one or both cam shafts having at least one one-way cam which may be in combination with one or both of a two-way cam and an interlock cam, said one-way and two-way cams being adapted to cooperate with one-way and two-way cam follower surfaces, respectively, to effect bidirectional and unidirectional movement of the respective shift rails upon oscillation of the cam shafts, with the cam follower surfaces also being adapted to alternately cooperate with the interlock cams to arrest all but the selected ones of the input and output shift rails against axial movement. Details of actuating means and mechanical interlock means are also set forth.