摘要:
The present invention is a transient vibration time history testing calibration system and method that assists testing equipment reproduce predefined earthquake synthesized waveforms within acceptable parameters. Adjustments are made to forces applied to the equipment under test (EUT) so that the acceleration of the EUT corresponds to a predetermined acceleration time history waveform. Information associated with the acceleration time history waveform is loaded in a controller which produces shaker drive signals that control movements of a shaker. Two waveform tests are run at an attenuated value (e.g., −3 dB) of a full level test on a dummy load. The acceleration of the dummy load is measured and adjustments are made to update the drive signals if the TRS is not within acceptable tolerances of the RRS. The adjustments are projected to provide shaker drive signals that shake the EUT within acceptable ranges of a RRS. Then a waveform test is run at full strength with the dummy load and the dummy load movements are measured. If the projected TRS for the equipment under test is not within acceptable tolerances of the RRS further adjustments calculated to bring the TRS within acceptable range of the RRS are made to the shaker drive signals. A waveform test is then performed on the EUT at an attenuated value and if the TRS is not projected to be within acceptable tolerances of an RRS for a full strength test, more adjustments are made to the shaker drive signals.
摘要:
A modular receptacle assembly includes integral optical indication. The receptacle assembly includes a module housing one or more receptacles configured to releasably receive, in an insertion direction, a leading portion of a modular plug. A light pipe having proximal and distal ends, is disposed in the footprint of the module. The proximal end is coupled to the receptacle, and the distal end is coupled to a light source. The proximal end is configured to radiate light onto the leading portion of a plug disposed within said receptacle. An actuator is configured to selectively operate the light pipe.
摘要:
A chiller arrangement (10) for liquid beverages including a pitcher shaped serving receptacle member (20) having a receptacle base (22) provided with an internally threaded collar (27) adapted to engage the closed lower end (31) of a tubular insert member (30) containing a freezable gel (38). The upper end (31) of the tubular insert member (30) is sealingly engaged by a closure element (35) and covered by a cap member (40) bearing an advertising panel member (50) which can be employed to both advertise and identify the brand name of the liquid beverage contained within the serving receptacle member (20).
摘要:
A method of improving the strength, temper and water resistance of leather utilizing selected amphiphilic copolymers is provided. The amphiphilic copolymers are formed from a predominant amount of at least one hydrophobic monomer and a minor amount of at least one copolymerizable hydrophilic monomer. The method is particularly useful as a one step substitute for conventional retanning and fatliquoring treatment steps. In a preferred embodiment the amphiphilic copolymers also provide a significant degree of water resistance to the leather.
摘要:
A king pin locking plate assembly having a locking plate provided on the underside with a pair of cooperating jaws pivotally supported under the locking plate and being urged into open position by a spring member positioned between the two jaws, the two jaws having a frontal portion facing a king pin, the frontal portion defining a lock surface which is adapted to be abutted by a free end of a jaw lock pivotally supported in the king pin receiving slot by a pivot which engages a bifurcated end of the jaw lock. A jaw lock stop is situated in the bifurcated end of the jaw lock and, because of its internal elongated opening, is capable of maintaining the jaw lock in either a king pin securing position or in a king pin releasing position.
摘要:
A generally circular cover for closing a hatch opening in a railroad car hopper is connected to a diametral support bar for limited pivotal movement to provide uniform gasket loading between the cover member and the hatch coaming. One end of the support bar is hinged to the hopper roof and the opposite end includes a cam surface and laterally projecting retaining pins for engagement with a latch member. The latch member has a somewhat channel shaped portion pivotally connected to a link which, in turn is also pivotally secured to the hopper roof. The link includes opposed trunnion portions which are engageable with the cam surface to forciby engage the support bar to hold the hatch cover closed. The latch member includes open ended slots which are engageable with the retaining pins in such a way that the latch member will not disengage from the support bar when the latch member is swung to the release position if fluid pressure within the car hopper is sufficient to force the cover toward an open position.
摘要:
The removal of the polymerization inhibitor p benzoquinone from acrylic and methacrylic monomers is effectuated by adding to the inhibited monomers either prior to distillation or during distillation in a distillation zone, sufficient amounts of a monoalkyl substituted hydroquinone, a 2,5-dialkyl substituted hydroquinone or a dihydroxynaphthalene to prevent the benzoquinone from co-distilling with the monomer or to convert the benzoquinone in a distillation zone to a non-volatile compound during the distillation so that the converted benzoquinone returns to the feed flask.