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1. 发明授权

US3928799A Automatic balancing DC comparator voltmeter 失效
标题翻译：自动平衡直流比较电压表
公开(公告)号：US3928799A
公开(公告)日：1975-12-23
申请号：US47148274
申请日：1974-05-20
申请人： CANADIAN PATENTS DEV
发明人： KUSTERS NORBERT L , MACMARTIN MALCOLM P
IPC分类号： G01R17/06 , G01R29/20
CPC分类号： G01R29/20 , G01R17/06
摘要： An apparatus for measuring potentials with great accuracy using a self-balancing current comparator. The comparator includes a variable primary winding and a secondary winding wound on a magnetic core. The primary is fed a constant current I2 and the secondary is fed with a direct current such that ampere-turns balance is achieved between the windings. A resistor R1, to which the unknown potential Vin is connected, is in turn connected to the secondary winding. An operational amplifier is connected to the junction between the resistor and the secondary winding. The output of the amplifier adjusts the turns in the primary winding and as a result when the potential across the amplifier is zero, the unknown voltage Vin R1.N2/N3. I2 where N2 and N3 are the turns in the primary and secondary windings respectively.
摘要翻译：一种使用自平衡电流比较器以高精度测量电位的装置。比较器包括可变初级绕组和缠绕在磁芯上的次级绕组。初级线圈馈送恒流电流I2，二次线路馈送直流电，使得绕组之间实现安培匝数平衡。连接未知电位Vin的电阻器R1又连接到次级绕组。运算放大器连接到电阻和次级绕组之间的结。放大器的输出调节初级绕组中的匝数，因此当放大器两端的电位为零时，未知电压Vin = R1.N2 / N3。 I2，其中N2和N3分别是初级和次级绕组的匝数。

2. 发明授权

US3916966A Method for kerfless cutting wood 失效
标题翻译：无木材切割木材的方法
公开(公告)号：US3916966A
公开(公告)日：1975-11-04
申请号：US54291275
申请日：1975-01-22
申请人： CANADIAN PATENTS DEV
发明人： JOHNSTON JOHN S , ST-LAURENT ANDRE
IPC分类号： B27M1/00 , B27M1/08 , B27C1/00
CPC分类号： B27M1/00
摘要： To reduce splitting ahead of a knife a block of wood is cut by compressively stressing the wood to at least 25% of its yield strength, between clamps, then cutting the wood with a knife along a path between the clamps, releasing the clamps to remove the compression, and then separating the wood from the knife. Two or more knives may be used cutting in opposite or the same, parallel directions.
摘要翻译：为了减少在刀前面的分裂，通过将木材压缩至其屈服强度的至少25％，在夹具之间切割木块，然后用刀沿着夹子之间的路径切割木材，释放夹具以移除压缩，然后从刀上分离木材。可以使用两个或更多个刀在相反或相同的平行方向上切割。

3. 发明授权

US3904481A Determination of nitrogenase 失效
标题翻译：氮化酶的测定
公开(公告)号：US3904481A
公开(公告)日：1975-09-09
申请号：US39300773
申请日：1973-08-30
申请人： CANADIAN PATENTS DEV
发明人： LARUE THOMAS ALFRED , KURZ WOLFGANG GEBHARD WALTER
IPC分类号： C07C45/30 , C12Q1/26 , C07G7/02 , C12K1/00
CPC分类号： C12Q1/26 , C07C45/30 , Y10S435/808 , Y10S435/81 , C07C47/04
摘要： In a mixture of ethylene and acetylene, the ethylene is selectively oxidized to formaldehyde. This oxidation is used in the determination of nitrogenase (nitrogen fixation) activity where ethylene produced by the enzyme from added acetylene, has to be measured. The formaldehyde produced from the ethylene is proportional to the enzyme activity, and can be assayed colorimetrically or otherwise.
摘要翻译：在乙烯和乙炔的混合物中，乙烯被选择性氧化成甲醛。该氧化用于测定由添加的乙炔生成的乙烯的氮酶（固氮）活性。由乙烯产生的甲醛与酶活性成比例，可用比色法或其他方法测定。

4. 发明授权

US3900317A Fe-sn-cu-pb sintered composite metal article and process 失效
标题翻译： FE-SN-CU-PB烧结复合金属制品和工艺
公开(公告)号：US3900317A
公开(公告)日：1975-08-19
申请号：US33856373
申请日：1973-03-06
申请人： CANADIAN PATENTS DEV
发明人： MEADUS FREDERICK W , SPARKS BRYAN D , PUDDINGTON IRA E
IPC分类号： B22F9/04 , C22C1/04 , F42B7/04 , B22F7/00
CPC分类号： B22F9/04 , C22C1/04 , F42B7/046 , Y10T428/12028 , Y10T428/1216
摘要： Composite metal articles of high density are made from powders of the following metals: about 25 to about 90 wt. % iron, up to about 5 wt. % of tin, copper or mixtures thereof, and the balance substantially all lead. Preferably zinc in amounts up to about 1.5% is also present. Composite bird shot, for instance, is prepared by agglomeration techniques, sintered and partially alloyed at below about 1,200*C and if desired mechanically compacted to further increase the density. A lead-rich outer layer is advantageous.

5. 发明授权

US3874237A Liquid level height measuring apparatus 失效
标题翻译：液位高度测量仪
公开(公告)号：US3874237A
公开(公告)日：1975-04-01
申请号：US33254473
申请日：1973-02-15
申请人： CANADIAN PATENTS DEV
发明人： ZWARTS CORNELIS M G
IPC分类号： G01F23/284 , G01F23/28
CPC分类号： G01F23/284
摘要： A liquid level height measuring device that is a transmission line oscillator comprising a parallel conductor transmission line positionable in the liquid whose height is to be measured and a sensor in the form of a switching device whose switching frequency is dependent only on transmission line length and thus on liquid level. The transmission line preferably includes a length of flexible coaxial cable connected in series to a rigid coaxial conductor structure with the center conductor positioned in relation to and electrically insulated from the outer conductor which has perforations over its working length for ready entry of the liquid into the space between conductors. The sensor is a two terminal bistable switching device, preferably a tunnel diode, connected to the transmission line such that a switching signal is generated whose frequency is dependent only on the transmission length.
摘要翻译：一种液位高度测量装置，其是传输线振荡器，包括可定位在要测量的高度的液体中的并行导体传输线和开关频率仅依赖于传输线长度的开关装置形式的传感器，因此液位。传输线优选地包括一段长度的柔性同轴电缆，其串联连接到刚性同轴导体结构，其中心导体相对于外部导体定位并且与其外部导体电绝缘，所述外部导体在其工作长度上具有穿孔以便液体准备进入导体之间的空间。传感器是连接到传输线的两端双稳态开关装置，优选隧道二极管，使得产生其频率仅取决于传输长度的切换信号。

6. 发明授权

US3866642A Veneer peeling with fluid injection 失效
标题翻译： VENEER PEELING WITH FLUID INJECTION
公开(公告)号：US3866642A
公开(公告)日：1975-02-18
申请号：US33756273
申请日：1973-03-02
申请人： CANADIAN PATENTS DEV
发明人： WALSER DONALD C
IPC分类号： B23Q11/10 , B27L5/00
CPC分类号： B27L5/00 , B23Q11/10 , Y10T83/0267 , Y10T83/263 , Y10T83/283
摘要： This invention relates to improvements in the production of veneer. In accordance with the invention a heated fluid, preferably steam, is directed into the cutting region as the veneer is being cut. Improvements that can be obtained are decrease of the cutting force, surface roughness and severity of lathe checks for the resulting veneer. Preferably the heated fluid is channeled in contact with the cutting blade before being released to the cutting region, in order to raise the temperature of the blade.
摘要翻译：本发明涉及单板生产的改进。根据本发明，当切割单板时，加热的流体，优选蒸汽，被导入切割区域。可以获得的改进是对所得单板的切削力，表面粗糙度和车床检查的严重性的降低。优选地，加热的流体在被释放到切割区域之前被引导与切割刀片接触，以便提高叶片的温度。

7. 发明授权

US3858521A Magnetic levitation guidance system 失效
标题翻译：磁力引导指导系统
公开(公告)号：US3858521A
公开(公告)日：1975-01-07
申请号：US34493373
申请日：1973-03-26
申请人： CANADIAN PATENTS DEV
发明人： ATHERTON DAVID L
IPC分类号： B60L13/04 , B61B13/08
CPC分类号： B61B13/08 , B60L13/04 , B60L2200/26 , Y10S505/904
摘要： A magnetic levitation guidance system having a predetermined arrangement and positioning of the magnets or current carrying conductors in the levitated vehicle in relation to the fixed guideway conductors. In one version of the invention the parallel, longitudinal vehicle magnets or current carrying conductors are positioned such that when the vehicle is positioned above a continuous conducting strip guideway positioned on the trackbed, these magnet edges or current carrying conductors are positioned outward in the horizontal sense of the edges of the conducting strip. In another version where the guideway is the form of loops or ladder shaped arrangements, the parallel, longitudal portions of the magnet edges or current loops on the vehicle are positioned when the vehicle is centered over the guideways such that these magnet edges or current carrying conductors are placed outwardly or inwardly of the co-acting conductors in the guideway. It has been found that if the magnet edges or current carrying conductors are positioned in this manner, there will be an inherent lateral restoring force that will tend to center the vehicle in relation to the guideway.
摘要翻译：一种磁悬浮引导系统，其具有相对于固定导轨导体在悬浮车辆中预定的布置和定位磁体或载流导体。在本发明的一个版本中，平行的纵向车辆磁体或载流导体被定位成使得当车辆位于位于轨道平台上的连续导电条导轨上方时，这些磁体边缘或载流导体在水平方向上位于外侧的导电条的边缘。在导轨是环形或梯形布置形式的另一种形式中，当车辆在导轨上居中时，位于车辆上的磁体边缘或电流回路的平行的纵向部分被定位成使得这些磁体边缘或载流导体被放置在导轨中的协同作用导体的外部或内部。已经发现，如果以这种方式定位磁体边缘或载流导体，将存在将使车辆相对于导轨居中的固有侧向恢复力。

8. 发明授权

US3857974A Process for the production of frozen eggs 失效
标题翻译：生产冷冻鸡蛋的方法
公开(公告)号：US3857974A
公开(公告)日：1974-12-31
申请号：US87962669
申请日：1969-11-24
申请人： CANADIAN PATENTS DEV
发明人： JOHNSON G , AREF M , STROZ J
IPC分类号： A23B5/04 , A23C3/04 , A23L3/375 , F25C1/00 , A23L1/32
CPC分类号： F25C1/00 , A23B5/041 , A23C3/045 , A23L3/375
摘要： A frozen food egg substance comprising free flowing discrete particles of the substance, with each particle in pop-corn-like form is produced by dropping the egg substance into direct contact with a non-toxic, liquified gas refrigerant. The egg substance, which may be egg white, egg yolk or homogenized egg yolk and egg white is dropped onto a turbulent surface of the refrigerant, and is removed from it as the discrete particles so that liquified gas on the particles is allowed to evaporate and the particles may be stored in a frozen condition.
摘要翻译：通过将蛋物质与无毒的液化气体制冷剂直接接触，产生包含物质的自由流动的离散颗粒的冷冻食品蛋物质，其中每个颗粒呈流行玉米样形式。可以是蛋清，蛋黄或均质的蛋黄和蛋清的蛋物质滴落到制冷剂的湍流表面上，并作为离散颗粒从其中除去，使得允许颗粒上的液化气体蒸发，颗粒可以以冷冻状态储存。

9. 发明授权

US3857925A Preparation of reinforcing amorphous silica 失效
标题翻译：增强非晶硅的制备
公开(公告)号：US3857925A
公开(公告)日：1974-12-31
申请号：US27063672
申请日：1972-07-11
申请人： CANADIAN PATENTS DEV
发明人： PUDDINGTON I , SIRIANNI A , FUNNELL N
IPC分类号： C01B33/193 , C08K3/36 , C01B33/14 , C01B33/16 , C01B33/18
CPC分类号： C01B33/193 , C01P2002/02 , C01P2006/11 , C01P2006/12 , C08K3/36 , C08L21/00
摘要： An amorphous, pulverulent, dry silica is prepared which is particularly useful for reinforcing rubber. It is produced by: A. PREPARING SEED PARTICLES BY ADDING A MINERAL ACID TO A DILUTE ALKALI METAL SILICATE SOLUTION CONTAINING 1 TO 3% BY WEIGHT OF SiO2 to form a sol having a pH of about 4.5 - 6.5 and allowing the sol to set into a firm aquagel, B. DILUTING AND DISPERSING THE AQUAGEL IN WATER TO FORM AN AQUEOUS DISPERSION OF AQUAGEL SEED PARTICLES, C. MIXING WITH SAID DISPERSION AN ALKALI METAL SILICATE SOLUTION, D. ADDING ACID TO SAID SEED DISPERSION-ALKALI METAL SILICATE MIXTURE AT A TEMPERATURE OF ABOUT 75* - 100* C to quickly lower the pH to about 1 to 4 and precipitate silica, E. SEPARATING THE WET PRECIPITATED SILICA FROM THE ASSOCIATED LIQUID AND DRYING THE FRESHLY PRECIPITATED SILICA.
摘要翻译：制备无定形，粉状，干燥的二氧化硅，其特别用于增强橡胶。它是由：

10. 发明授权

US3849727A Current comparator for power and energy measurements 失效
标题翻译：电力和能源测量的电流比较器
公开(公告)号：US3849727A
公开(公告)日：1974-11-19
申请号：US38745073
申请日：1973-08-10
申请人： CANADIAN PATENTS DEV
发明人： KUSTERS N , MOORE W
IPC分类号： G01R35/04 , G01R21/00
CPC分类号： G01R35/04
摘要： An instrument for the measurement of energy or power with a high degree of precision. The voltage and current components of the power are determined individually. The voltage component is measured using a precise instrument such as an AC/DC comparator. The current component is measured in a current comparator in which it is balanced against current obtained by applying the voltage component to a high quality resistor and a high quality capacitor. The instrument is especially useful in the calibration of wattmeters and watt-hour meters.
摘要翻译：用于高精度测量能量或功率的仪器。功率的电压和电流分量单独确定。使用诸如AC / DC比较器的精确仪器来测量电压分量。在电流比较器中测量电流分量，其中它与通过将电压分量施加到高质量电阻器和高质量电容器而获得的电流进行平衡。该仪器在瓦特表和瓦特计的校准中特别有用。

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