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1. 发明授权

US4398173A Safeness indicator for flexible shafts used in automotive steering mechanisms 失效
标题翻译：用于汽车转向机构的柔性轴的安全指示器
公开(公告)号：US4398173A
公开(公告)日：1983-08-09
申请号：US309648
申请日：1981-10-08
申请人： Walter Kulischenko , Philip E. Bloomfield
发明人： Walter Kulischenko , Philip E. Bloomfield
IPC分类号： B62D1/19 , G08B21/00
CPC分类号： B62D1/19 , Y10S310/80
摘要： In a vehicle steering system for automobiles, for example, a steering column is provided with a rotatable flexible shaft at the end thereof for improving the ability of the column to absorb energy in a crash situation. The flexible shaft has at least one strip of a plastic material, preferably polyvinylidene fluoride film made piezoelectric by known methods, secured to an outermost winding of the flexible shaft. Turning the steering wheel will torsionally deflect the flexible shaft which causes the piezoelectric strips to generate millivoltages thereacross. A deteriorating flexible shaft will deflect more under torsional stress than a comparable newer flexible shaft and the piezoelectric strip or strips secured to the deteriorating shaft will consequently produce higher millivoltages. These millivoltages are amplified and fed to indicating means for indicating the degree of safeness of the flexible shaft.
摘要翻译：例如，在汽车的车辆转向系统中，转向柱在其末端设置有可旋转的柔性轴，以提高柱在碰撞情况下吸收能量的能力。柔性轴具有塑料材料的至少一个条，优选通过已知方法制成的聚偏二氟乙烯膜固定在柔性轴的最外侧的绕组上。转动方向盘会使柔性轴扭转，导致压电条在其上产生毫伏。扭转应力下降的柔性轴将比可比较的较新的柔性轴更多地偏转，并且固定在恶化轴上的压电条或带将因此产生更高的毫伏。这些毫伏被放大并被馈送到用于指示柔性轴的安全程度的指示装置。

2. 发明授权

US4692285A Process of preparing nonfibrous, piezoelectric polymer sheet of improved activity 失效
标题翻译：制备具有改善活性的非织造，压电聚合物片的工艺
公开(公告)号：US4692285A
公开(公告)日：1987-09-08
申请号：US750443
申请日：1985-07-01
申请人： Philip E. Bloomfield , Seymour Preis
发明人： Philip E. Bloomfield , Seymour Preis
IPC分类号： C08J5/18 , B29C71/02 , H01L41/193 , H01L41/22 , H01L41/26 , B29C71/04
CPC分类号： H01L41/45 , H01L41/193 , H01L41/257
摘要： A nonfibrous, unoriented sheet of a copolymer resin of about 65 to 85 mol percent of vinylidene fluoride and from 15 to about 35 mol percent of at least one other copolymerizable substituted monoolefinic monomer, said sheet having improved and uniform piezoelectric properties for hydrophonic use, and the process for preparing said sheet with improved piezoelectric and dielectric breakdown strength properties wherein it is heated for at least about 20 minutes within the temperature range of above the crystalline melting temperature and below a defined temperature, cooled to below the Curie temperature and then electrically poled, are disclosed herein.
摘要翻译：约65〜85摩尔％的偏二氟乙烯和15〜约35摩尔％的至少一种其它可共聚取代的单烯烃单体的共聚物树脂的非纤维，未取向的片材，所述片材具有改善的和均匀的用于水中使用的压电性能，以及制备具有改进的压电和介电击穿强度性能的所述片材的方法，其中在高于结晶熔融温度并低于限定温度的温度范围内将其加热至少约20分钟，冷却至低于居里温度，然后电极化，在此公开。

3. 发明授权

US4800048A Die drawing process and apparatus for piezoelectric polymer films and tubes 失效
标题翻译：用于压电聚合物膜和管的压模工艺和设备
公开(公告)号：US4800048A
公开(公告)日：1989-01-24
申请号：US126993
申请日：1987-11-30
申请人： Philip E. Bloomfield , Richard A. Ferren , Dean H. Wickwire
发明人： Philip E. Bloomfield , Richard A. Ferren , Dean H. Wickwire
IPC分类号： D02J1/22 , B29C55/30 , B29K27/12 , B29L9/00 , H01L41/45 , B29C47/02
CPC分类号： H01L41/45
摘要： Apparatus and processes for preparing polymeric piezoelectric films of one or more layers or tubular products having a central wire core by drawing a suitable polymeric blank through either a flat or a conically tapered drawing die having associated electrical field producing means, to simultanelusly stretch and pole the polymeric material within the die chamber.
摘要翻译：用于制备具有中心线芯的一个或多个层或管状产品的聚合物压电膜的装置和方法，其通过具有相关联的电场产生装置的平面或锥形拉拔模具拉制合适的聚合物坯料，以同时伸展和极化聚合物材料在模腔内。

4. 发明授权

US4366768A Power steering direction sensor 失效
标题翻译：动力转向方向传感器
公开(公告)号：US4366768A
公开(公告)日：1983-01-04
申请号：US385735
申请日：1982-06-07
申请人： Walter Kulischenko , Philip E. Bloomfield , Richard A. Ferren
发明人： Walter Kulischenko , Philip E. Bloomfield , Richard A. Ferren
IPC分类号： B62D15/02 , B63H25/24 , G01L5/22 , B63H25/00
CPC分类号： B63H25/24 , B62D15/02 , G01L5/221 , Y10S310/80
摘要： A plastic material, preferably polyvinylidene fluoride (PVDF) film, made highly piezoelectric by known methods, is placed in a sensor unit structure wherein pressure is exerted against the piezoelectric film by means of rotation of the steering wheel of the boat or vehicle to thereby cause the piezoelectric film to generate electric signals which are used in controlling the rpm of a low-inertia, instantaneously reversible steering power assist motor. The rpm of the motor is substantially proportional to the input electric signals, which, in turn, are determined by, and responsive to, the degrees of rotation and speed of rotation of the steering wheel. The direction of rotation of the steering wheel determines the direction of steering assist, i.e., to the left or right. Available torque of the motor however is substantially inversely proportional to rpm of the engine propelling the boat or vehicle.
摘要翻译：通过已知方法制成的高度压电的塑料材料（优选聚偏二氟乙烯（PVDF））被放置在传感器单元结构中，其中通过船或车辆的方向盘的旋转对压电膜施加压力，从而导致该压电膜产生用于控制低惯量，瞬时可逆转向助力电动机的转速的电信号。马达的转速基本上与输入的电信号成比例，输入电信号又由方向盘的转动程度和转速决定，并响应于此。方向盘的旋转方向确定转向辅助的方向，即向左或向右。然而，马达的可用扭矩与推动船或车辆的发动机的转速大致成反比。

5. 发明授权

US4592727A Piezoelectric polymeric film discriminating bite force occlusal indicator 失效
标题翻译：压电聚合物膜鉴别咬力咬合指示剂
公开(公告)号：US4592727A
公开(公告)日：1986-06-03
申请号：US613687
申请日：1984-05-24
申请人： Philip E. Bloomfield
发明人： Philip E. Bloomfield
IPC分类号： A61C19/05 , A61C9/00
CPC分类号： A61C19/05
摘要： Strips are prepared from a stack of two superposed metallized polymer films, each film having piezoelectric properties. The stack is coated with a conventional plastically deformable wax impression material to provide the normal visual indication of bite deflection and premature teeth engagement. The stack of metallized polymer films provides means through which sliding bite forces exerted during occlusal analysis may be monitored and recorded.
摘要翻译：条带由两层叠置的金属化聚合物膜组成，每片具有压电特性。该叠层被涂覆有常规的塑性可变形蜡印模材料，以提供咬合偏转和过早牙齿啮合的正常视觉指示。金属化聚合物膜堆提供了可以监测和记录在咬合分析期间施加的滑动咬合力的装置。

6. 发明授权

US4512431A Weight sensing apparatus employing polymeric piezoelectric film 失效
标题翻译：使用聚合物压电膜的重量感测装置
公开(公告)号：US4512431A
公开(公告)日：1985-04-23
申请号：US527145
申请日：1983-08-29
申请人： Philip E. Bloomfield
发明人： Philip E. Bloomfield
IPC分类号： G01G3/13 , G01G3/14
CPC分类号： G01G3/13 , Y10S310/80
摘要： Weight sensing apparatus, typically a personal scale, employs a thin film of piezoelectric polymeric material as the transducing component for converting mechanical pressure in the form of applied weight to voltages which are digitally displayed in pounds.
摘要翻译：重量感测装置（通常为个人秤）采用压电聚合材料薄膜作为转换部件，用于将施加重量的形式的机械压力转换为以磅数显示的电压。

7. 发明授权

US4488873A Piezoelectric polymeric film occlusal force indicator 失效
标题翻译：压电聚合物膜咬合力指示剂
公开(公告)号：US4488873A
公开(公告)日：1984-12-18
申请号：US504203
申请日：1983-06-14
申请人： Philip E. Bloomfield , Harry Shpuntoff
发明人： Philip E. Bloomfield , Harry Shpuntoff
IPC分类号： A61C19/05 , A61C9/00
CPC分类号： A61C19/05 , Y10S310/80
摘要： Dental impression strips prepared from metallized polymer film having piezoelectric properties are coated with a conventional plastically deformable wax impression material to provide the normal visual indication of bite deflection and premature teeth engagement. The metallized polymer film provides means through which force exerted during occlusal analysis may be monitored and recorded. By coating the metallized polymer film with a non-permanently deformable and reusable plastic, the monitoring and recording may readily be demonstrated to the dentist and patient.
摘要翻译：由具有压电性质的金属化聚合物膜制备的牙印纹条被涂覆有常规的塑性可变形蜡印模材料，以提供咬合偏转和过早牙齿啮合的正常视觉指示。金属化聚合物膜提供了可以监测和记录在咬合分析期间施加的力的装置。通过用非永久变形和可重复使用的塑料涂覆金属化聚合物膜，可以容易地向牙医和患者证明监测和记录。

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