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New Patents 4788078 METHOD FOR PLATING AND COATING ARTICLES Donald Broomfield, Paul C Briggs, Eric G Par- ker, David P Wagner assigned to Illinois Tool Works Inc Method and apparatus for the coating of a subs- trate wherein the following chronologically takes place under vacuum conditions: (i) non- oxidized plating material is deposited on the sub- strate via ion vapor deposition; and (ii) a coating material is chemically bonded with the non- oxidized plating material. The coating material may comprise a primer, which chemically bonds with the non-oxidized plating material, and a polymer, which impregnates the primer- prepared plating material. Said polymer may also chemically bond with the primer. Alterna- tively, the coating material may comprise an epoxy which forms an organo-metallic bond with the plating material. In another embodi- ment of the invention, the coating material may comprise boron trifluoride, which chemcially bonds with the non-oxidized plating material, and a polymer, which impregnates the boron trifluoride-prepared plating material. Alterna- tively, the coating material may comprise cal- cium, silicon, and oxygen which chemically bonds with the plating material. The coating material may be bifunctional, in that it not only chemically bonds with the plating material but also bonds with a second coating material, yiel- ding a chemically bonded uniform coating with desired results. housing, lower peripheral gas passages con- nected to a supply inlet of reverse flow cooling gas formed around a lower portion of the housing, partition walls between the upper and lower peripheral gas passages, and inter-section walls for separating adjacent pump sections. Communicating passages are formed through the inter-section walls for communicating the lower peripheral gas passages of a pump section with the upper peripheral gas passages of the fol- lowing pump section, connection pipes are pro- vided between an outlet passage of the casing of a pump section and an inlet passage of the casing of the following pump section, and coolers are provided in the connection pipes. 4791805 FUEL TANK LEAK DETECTION APPARATUS Donald Gates assigned to Expertek Inc A method and device for testing for leaks in fuel tanks. The method requires a vacuum be drawn around the fuel tank while a test gas is injected into the tank. Any leaks in the tank will permit the test gas to be drawn into the vacuum cham- ber, the output of which is tested by a sensor sensitive to the test gas. The entire test is con- ducted assuring speed, accuracy and safety. The tank device contains a vacuum chamber which is molded directly upon the tank to be tested, thereby minimizing the size of the vacuum cham- ber. The device also contains a sealing system which is adjustable. An optional addition to the system is a method of localizing a leak that is detected. 4789314 4792722 MULTI-SECTION ROOTS VACUUM PUMP OF REVERSE FLOW COOLING TYPE WITH INTERNAL FLOW DIVISION ARRANGEMENT Tsutomu Higuchi, Shigeharu Kambe, Yokohama, Japan assigned to Unozawa-Gumi Iron Works Ltd A multi-section Roots vacuum pump of the reverse flow cooling type with internal flow divi- sion arrangement includes a sequence of pump sections, casings for the pump sections including housings for accommodating pairs of rotor therein, inlet passages and outlet passages con- nected to the casing for pump sections, upper peripheral gas passages connected to the inlet passage formed around an upper portion of the CATHODE RAY TUBE HAVING A FLAT FACEPLATE ATTACHED BY A COMPLIANT PRESSURE BONDED SEAL Leslie H Francis, Horley, United Kingdom as- signed to U S Philips Corporation A cathode ray tube has an envelope comprising a mild steel rear housing (1) with a side wall por- tion (4) defining an opening over which a flat, glass, faceplate (2) is mounted. The faceplate is sealed in a vacuum tight manner using a com- pliant pressure bonded seal (lo), comprising pre- ssure deformable material such as lead, to the outer, flat surface of a flange (8) of the rear housing which projects inwardly of the opening from the side wall portion. 111

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Page 1: Multi-section roots vacuum pump of reverse flow cooling type with internal flow division arrangement

New Patents

4788078

METHOD FOR PLATING AND COATING ARTICLES

Donald Broomfield, Paul C Briggs, Eric G Par- ker, David P Wagner assigned to Illinois Tool Works Inc

Method and apparatus for the coating of a subs- trate wherein the following chronologically takes place under vacuum conditions: (i) non- oxidized plating material is deposited on the sub- strate via ion vapor deposition; and (ii) a coating material is chemically bonded with the non- oxidized plating material. The coating material may comprise a primer, which chemically bonds with the non-oxidized plating material, and a polymer, which impregnates the primer- prepared plating material. Said polymer may also chemically bond with the primer. Alterna- tively, the coating material may comprise an epoxy which forms an organo-metallic bond with the plating material. In another embodi- ment of the invention, the coating material may comprise boron trifluoride, which chemcially bonds with the non-oxidized plating material, and a polymer, which impregnates the boron trifluoride-prepared plating material. Alterna- tively, the coating material may comprise cal- cium, silicon, and oxygen which chemically bonds with the plating material. The coating material may be bifunctional, in that it not only chemically bonds with the plating material but also bonds with a second coating material, yiel- ding a chemically bonded uniform coating with desired results.

housing, lower peripheral gas passages con- nected to a supply inlet of reverse flow cooling gas formed around a lower portion of the housing, partition walls between the upper and lower peripheral gas passages, and inter-section walls for separating adjacent pump sections. Communicating passages are formed through the inter-section walls for communicating the lower peripheral gas passages of a pump section with the upper peripheral gas passages of the fol- lowing pump section, connection pipes are pro- vided between an outlet passage of the casing of a pump section and an inlet passage of the casing of the following pump section, and coolers are provided in the connection pipes.

4791805

FUEL TANK LEAK DETECTION APPARATUS

Donald Gates assigned to Expertek Inc

A method and device for testing for leaks in fuel tanks. The method requires a vacuum be drawn around the fuel tank while a test gas is injected into the tank. Any leaks in the tank will permit the test gas to be drawn into the vacuum cham- ber, the output of which is tested by a sensor sensitive to the test gas. The entire test is con- ducted assuring speed, accuracy and safety. The tank device contains a vacuum chamber which is molded directly upon the tank to be tested, thereby minimizing the size of the vacuum cham- ber. The device also contains a sealing system which is adjustable. An optional addition to the system is a method of localizing a leak that is detected.

4789314 4792722

MULTI-SECTION ROOTS VACUUM PUMP OF REVERSE FLOW COOLING TYPE WITH INTERNAL FLOW DIVISION

ARRANGEMENT

Tsutomu Higuchi, Shigeharu Kambe, Yokohama, Japan assigned to Unozawa-Gumi Iron Works Ltd

A multi-section Roots vacuum pump of the reverse flow cooling type with internal flow divi- sion arrangement includes a sequence of pump sections, casings for the pump sections including housings for accommodating pairs of rotor therein, inlet passages and outlet passages con- nected to the casing for pump sections, upper peripheral gas passages connected to the inlet passage formed around an upper portion of the

CATHODE RAY TUBE HAVING A FLAT FACEPLATE ATTACHED BY

A COMPLIANT PRESSURE BONDED SEAL

Leslie H Francis, Horley, United Kingdom as- signed to U S Philips Corporation

A cathode ray tube has an envelope comprising a mild steel rear housing (1) with a side wall por- tion (4) defining an opening over which a flat, glass, faceplate (2) is mounted. The faceplate is sealed in a vacuum tight manner using a com- pliant pressure bonded seal (lo), comprising pre- ssure deformable material such as lead, to the outer, flat surface of a flange (8) of the rear housing which projects inwardly of the opening from the side wall portion.

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