ES338670A1 - Procedimiento y aparato reversible para convertir energia termica en energia mecanica. - Google Patents
Procedimiento y aparato reversible para convertir energia termica en energia mecanica.Info
- Publication number
- ES338670A1 ES338670A1 ES338670A ES338670A ES338670A1 ES 338670 A1 ES338670 A1 ES 338670A1 ES 338670 A ES338670 A ES 338670A ES 338670 A ES338670 A ES 338670A ES 338670 A1 ES338670 A1 ES 338670A1
- Authority
- ES
- Spain
- Prior art keywords
- procedure
- fluid
- alloy
- energy
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000002441 reversible effect Effects 0.000 title 1
- 229910045601 alloy Inorganic materials 0.000 abstract 3
- 239000000956 alloy Substances 0.000 abstract 3
- 239000012530 fluid Substances 0.000 abstract 3
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910001000 nickel titanium Inorganic materials 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/006—Resulting in heat recoverable alloys with a memory effect
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/007—Alloys based on nickel or cobalt with a light metal (alkali metal Li, Na, K, Rb, Cs; earth alkali metal Be, Mg, Ca, Sr, Ba, Al Ga, Ge, Ti) or B, Si, Zr, Hf, Sc, Y, lanthanides, actinides, as the next major constituent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/061—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element
- F03G7/0613—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element using layers of different materials joined together, e.g. bimetals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/061—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element
- F03G7/0614—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element using shape memory elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/063—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the mechanic interaction
- F03G7/0633—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the mechanic interaction performing a rotary movement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/065—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like using a shape memory element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/323—Thermally-sensitive members making use of shape memory materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/01—Connections using shape memory materials, e.g. shape memory metal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/1842—Ambient condition change responsive
- Y10T137/1939—Atmospheric
- Y10T137/1963—Temperature
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Temperature-Responsive Valves (AREA)
- Forging (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US540422A US3403238A (en) | 1966-04-05 | 1966-04-05 | Conversion of heat energy to mechanical energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES338670A1 true ES338670A1 (es) | 1968-04-01 |
Family
ID=24155391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES338670A Expired ES338670A1 (es) | 1966-04-05 | 1967-03-30 | Procedimiento y aparato reversible para convertir energia termica en energia mecanica. |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3403238A (es) |
| AT (1) | AT270306B (es) |
| BE (1) | BE696508A (es) |
| CH (1) | CH451599A (es) |
| DE (1) | DE1288363B (es) |
| ES (1) | ES338670A1 (es) |
| GB (1) | GB1180782A (es) |
| NL (1) | NL6704161A (es) |
| SE (1) | SE325739B (es) |
Families Citing this family (83)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3483748A (en) * | 1967-05-05 | 1969-12-16 | Avco Corp | Temperature sensing |
| US3594675A (en) * | 1969-05-28 | 1971-07-20 | Robertshaw Controls Co | Temperature-sensing probe |
| US3582856A (en) * | 1969-06-18 | 1971-06-01 | Gen Electric | Temperature sensing relay |
| US3613732A (en) * | 1969-07-17 | 1971-10-19 | Robertshaw Controls Co | Temperature-responsive valve operators |
| US3634803A (en) * | 1969-07-22 | 1972-01-11 | Robertshaw Controls Co | Temperature-responsive switch assemblies |
| US3676815A (en) * | 1969-07-28 | 1972-07-11 | Essex International Inc | Thermally sensitive controls for electric circuits |
| US3594674A (en) * | 1969-08-13 | 1971-07-20 | Robertshaw Controls Co | Temperature-responsive control devcies adjustably responsive to various operating temperatures |
| JPS501661B1 (es) * | 1970-01-12 | 1975-01-20 | ||
| US3707694A (en) * | 1970-03-09 | 1972-12-26 | Essex International Inc | Thermally sensitive circuit control apparatus |
| US3725835A (en) * | 1970-07-20 | 1973-04-03 | J Hopkins | Memory material actuator devices |
| US3720898A (en) * | 1970-12-29 | 1973-03-13 | American Thermostat Corp | Temperature-sensitive assist for temperature-controlled switch |
| US3703693A (en) * | 1971-04-01 | 1972-11-21 | American Thermostat Corp | Liquid level sensing system |
| US3754151A (en) * | 1972-09-20 | 1973-08-21 | R Clark | Thermal motor and generator |
| US3959691A (en) * | 1973-04-16 | 1976-05-25 | Texas Instruments Incorporated | Motor protector |
| US3845931A (en) * | 1973-06-11 | 1974-11-05 | Texas Instruments Inc | Valve |
| US3974844A (en) * | 1973-06-11 | 1976-08-17 | Texas Instruments Incorporated | Valve |
| FR2250018B3 (es) * | 1973-11-02 | 1977-08-05 | Ver Flugtechnische Werke | |
| US3883885A (en) * | 1973-12-04 | 1975-05-13 | Carl Orlando | High-speed shutter |
| US3913326A (en) * | 1974-04-11 | 1975-10-21 | Us Energy | Energy conversion system |
| US4068820A (en) * | 1974-08-26 | 1978-01-17 | Texas Instruments Incorporated | Valve |
| US4010612A (en) * | 1974-12-13 | 1977-03-08 | Dante J. Sandoval | Thermal motor |
| GB1549166A (en) * | 1975-03-24 | 1979-08-01 | Delta Materials Research Ltd | Devices for converting heat energy to mechanical energy |
| US4086769A (en) * | 1975-05-19 | 1978-05-02 | The United States Of America As Represented By The Secretary Of The Navy | Compound memory engine |
| US4941627A (en) * | 1975-12-16 | 1990-07-17 | The United States Of America As Represented By The Secretary Of The Navy | Guidance and control fin |
| US4037411A (en) * | 1976-02-02 | 1977-07-26 | Hochstein Peter A | Thermal energy converting assembly |
| US4027479A (en) * | 1976-05-06 | 1977-06-07 | Cory John S | Variable density heat engine |
| DE2723332C3 (de) * | 1977-05-24 | 1982-02-04 | Peter A. Sterling Heights Mich. Hochstein | Vorrichtung zum Umwandelnvon Wärmeenergie in mechanische Arbeit |
| US4231223A (en) * | 1978-06-09 | 1980-11-04 | Pringle William L | Thermal energy scavenger (rotating wire modules) |
| US4197709A (en) * | 1978-06-09 | 1980-04-15 | Hochstein Peter A | Thermal energy scavenger (stress limiter) |
| US4275561A (en) * | 1978-08-03 | 1981-06-30 | Wang Frederick E | Energy conversion system |
| US4191053A (en) * | 1978-11-30 | 1980-03-04 | Delta Materials Research Limited | Temperature-responsive actuator |
| US4304613A (en) * | 1980-05-12 | 1981-12-08 | The United States Of America As Represented By The Secretary Of The Navy | TiNi Base alloy shape memory enhancement through thermal and mechanical processing |
| US4282033A (en) * | 1980-06-16 | 1981-08-04 | The United States Of America As Represented By The Secretary Of The Navy | Melting method for high-homogeneity precise-composition nickel-titanium alloys |
| JPS58166272U (ja) * | 1982-04-28 | 1983-11-05 | 三菱電機株式会社 | 車両用発電機 |
| US4645489A (en) * | 1982-11-30 | 1987-02-24 | Beta Phase, Inc. | Fluid delivery apparatus with shape-memory flow control element |
| FR2549978B1 (fr) * | 1983-07-25 | 1986-04-11 | Peugeot | Dispositif d'actionnement reversible par pieces a reprise thermique et vehicule equipe de ce dispositif |
| JPS6032980A (ja) * | 1983-08-03 | 1985-02-20 | Hitachi Ltd | 駆動装置 |
| US4553393A (en) * | 1983-08-26 | 1985-11-19 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Memory metal actuator |
| US4665334A (en) * | 1983-08-26 | 1987-05-12 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Rotary stepping device with memory metal actuator |
| US4522219A (en) * | 1983-12-31 | 1985-06-11 | Kato Hatsujo Kaisha Ltd. | Freeze preventing valve |
| JPS60146976A (ja) * | 1983-12-31 | 1985-08-02 | Kato Hatsujo Kaisha Ltd | 凍結防止弁 |
| US4745876A (en) * | 1984-01-12 | 1988-05-24 | Facet Enterprises, Inc. | Differential pressure responsive indicating device |
| FR2560992B1 (fr) * | 1984-02-14 | 1987-05-15 | Jehanno Jean Vincent | Mecanisme indicateur polyvalent pour le controle de temperatures |
| US4570851A (en) * | 1984-05-07 | 1986-02-18 | Cirillo John R | Temperature regulating, pressure relief flow valves employing shaped memory alloys |
| DE3503151A1 (de) * | 1985-01-31 | 1986-08-07 | Bernhard 4300 Essen Brüne | Absperrvorrichtung fuer automobilheizungssysteme |
| US4655629A (en) * | 1985-02-19 | 1987-04-07 | Westinghouse Electric Corp. | Flexural pivot device and method for assembling same |
| US4840346A (en) * | 1985-04-11 | 1989-06-20 | Memory Metals, Inc. | Apparatus for sealing a well blowout |
| US4715637A (en) * | 1985-04-17 | 1987-12-29 | Hitachi, Ltd. | Grip device for sheet-like objects |
| US4713063A (en) * | 1985-04-29 | 1987-12-15 | Beta Phase, Inc. | Intravenous tube and controller therefor |
| US4731069A (en) * | 1986-05-01 | 1988-03-15 | Beta Phase, Inc. | Intravenous tube and controller therefor |
| JPS6388254A (ja) * | 1986-09-30 | 1988-04-19 | Walbro Far East Inc | 気化器のためのチヨ−ク弁機構 |
| DE3637102A1 (de) * | 1986-10-31 | 1988-05-19 | Krupp Gmbh | Vorrichtung mit vorverformten biegeelement und dessen verwendung |
| FR2608632A1 (fr) * | 1986-12-23 | 1988-06-24 | Univ Metz | Procede de realisation d'une deformation reversible d'au moins une paire de corps solides en materiau pseudo-elastique ou a memoire de forme par application d'un gradient thermique differentiel et dispositif pour la mise en oeuvre de ce procede |
| US4841730A (en) * | 1987-07-02 | 1989-06-27 | Pda Engineering | Thermal actuator |
| US4939536A (en) * | 1987-07-21 | 1990-07-03 | Brother Kogyo Kabushiki Kaisha | Thermal fixing device in an image recording apparatus |
| US4836496A (en) * | 1987-08-27 | 1989-06-06 | Johnson Service Company | SMF actuator |
| JPH01216170A (ja) * | 1988-02-19 | 1989-08-30 | Seki Rengou Hamono Kyodo Kumiai | 凍結防止装置付き水道バルブ用のコマ |
| DE3900477A1 (de) * | 1989-01-10 | 1990-07-12 | Systemtechnik Gmbh | Thermisch betaetigte klappenvorrichtung |
| US4899543A (en) * | 1989-03-29 | 1990-02-13 | Grumman Aerospace Corporation | Pre-tensioned shape memory actuator |
| US4973024A (en) * | 1989-09-26 | 1990-11-27 | Toki Corporation Kabushiki Kaisha | Valve driven by shape memory alloy |
| US4945727A (en) * | 1989-12-11 | 1990-08-07 | Whitehead Charles A | Hydraulic shape memory alloy actuator |
| DE4113504A1 (de) * | 1991-04-25 | 1992-11-05 | Messerschmitt Boelkow Blohm | Vorrichtung zur ausnutzung der eigenschaften von gedaechtnislegierungen |
| US5215145A (en) * | 1992-02-14 | 1993-06-01 | Baker Hughes Incorporated | Wedge-set sealing flap for use in subterranean wellbores |
| US5273116A (en) * | 1992-02-14 | 1993-12-28 | Baker Hughes Incorporated | Firing mechanism for actuating wellbore tools |
| US5199497A (en) * | 1992-02-14 | 1993-04-06 | Baker Hughes Incorporated | Shape-memory actuator for use in subterranean wells |
| DE4208840A1 (de) * | 1992-03-19 | 1993-09-23 | Schaeffler Waelzlager Kg | Spannvorrichtung fuer einen treibriemen |
| US5410290A (en) * | 1993-08-02 | 1995-04-25 | Cho; Dong-Il | Shape memory alloy relays and switches |
| US5430333A (en) * | 1994-07-15 | 1995-07-04 | Binford; Mark S. | Energy generating system and method |
| DE19649225A1 (de) * | 1996-11-27 | 1998-05-28 | Nass Magnet Gmbh | Ventil |
| JP3326087B2 (ja) * | 1996-12-26 | 2002-09-17 | 明久 井上 | 光ファイバーコネクター用フェルール及びその製造方法 |
| JP2000314830A (ja) | 1999-05-06 | 2000-11-14 | Ykk Corp | 多芯光コネクタ用及び多芯光ファイバ整列用のｖ溝基板及びそれらの製造方法 |
| US6807035B1 (en) | 2000-11-28 | 2004-10-19 | Hubbell Incorporated | Fault interrupter using microcontroller for fault sensing and automatic self-testing |
| US6831819B2 (en) * | 2001-09-09 | 2004-12-14 | David C. Nemir | Fail safe fault interrupter using secondary breaker |
| US7292419B1 (en) | 2001-09-09 | 2007-11-06 | Nemir David C | Fault interrupter with interchangeable line load connections |
| US7029044B2 (en) * | 2003-11-18 | 2006-04-18 | General Motors Corporation | Tunable, healable vehicle impact devices |
| KR100585799B1 (ko) * | 2003-12-19 | 2006-06-07 | 엘지전자 주식회사 | 스크롤압축기의 고온방지장치 |
| US7733617B2 (en) * | 2005-08-08 | 2010-06-08 | Hubbell Incorporated | Self testing digital fault interrupter |
| DE102006026059A1 (de) * | 2006-06-03 | 2007-12-06 | Rehau Ag + Co. | Durchflussventil mit zwei Verschlusselementen und einem temperaturabhängigen Stellelement |
| DE102007045348A1 (de) * | 2007-09-22 | 2009-04-02 | Rehau Ag + Co. | Antriebs-Stelleinrichtung zur Umstellung eines Funktionskörpers zwischen einer Ruhestellung und einer Betriebsstellung |
| US8299637B2 (en) * | 2009-12-16 | 2012-10-30 | GM Global Technology Operations LLC | Shape-memory alloy-driven power plant and method |
| DK177268B1 (da) | 2011-02-23 | 2012-09-10 | JOLTECH ApS | Et aktuatorelement til at generere en kraft eller bevægelse |
| DE102012022016A1 (de) | 2012-11-08 | 2014-05-08 | Heinz-Dieter Beeck | Verfahren zur Transformation von Auftriebskräften |
| US9920750B1 (en) | 2015-06-08 | 2018-03-20 | Amazon Technologies, Inc. | Energy production from waste heat using a shape memory drive or heat engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3174851A (en) * | 1961-12-01 | 1965-03-23 | William J Buehler | Nickel-base alloys |
-
1966
- 1966-04-05 US US540422A patent/US3403238A/en not_active Expired - Lifetime
-
1967
- 1967-03-21 NL NL6704161A patent/NL6704161A/xx unknown
- 1967-03-30 DE DEB91848A patent/DE1288363B/de not_active Withdrawn
- 1967-03-30 ES ES338670A patent/ES338670A1/es not_active Expired
- 1967-03-31 CH CH454867A patent/CH451599A/de unknown
- 1967-03-31 AT AT307167A patent/AT270306B/de active
- 1967-04-03 BE BE696508D patent/BE696508A/xx unknown
- 1967-04-04 GB GB05438/67A patent/GB1180782A/en not_active Expired
- 1967-04-04 SE SE04657/67A patent/SE325739B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE696508A (es) | 1967-09-18 |
| AT270306B (de) | 1969-04-25 |
| DE1288363B (de) | 1969-01-30 |
| SE325739B (es) | 1970-07-06 |
| US3403238A (en) | 1968-09-24 |
| GB1180782A (en) | 1970-02-11 |
| NL6704161A (es) | 1967-10-06 |
| CH451599A (de) | 1968-05-15 |
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