GB1383476A - Positioning device using negative spring-rate tensioning means - Google Patents
Positioning device using negative spring-rate tensioning meansInfo
- Publication number
- GB1383476A GB1383476A GB639073A GB639073A GB1383476A GB 1383476 A GB1383476 A GB 1383476A GB 639073 A GB639073 A GB 639073A GB 639073 A GB639073 A GB 639073A GB 1383476 A GB1383476 A GB 1383476A
- Authority
- GB
- United Kingdom
- Prior art keywords
- recorder
- strut
- coil
- wire
- rotation
- 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
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Feedback Control In General (AREA)
- Control Of Position Or Direction (AREA)
- Rehabilitation Tools (AREA)
- Recording Measured Values (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
1383476 Electric meters; recording apparatus FOXBORO CO 9 Feb 1973 [31 March 1972] 6390/73 Headings G1Q and G1J [Also in Division F2] An apparatus for positioning a member 76 includes an element 70 which changes dimensionally with temperature and a spring assembly 82, 90 which opposes any temperature-induced changes in the member 76 and whose opposing force reduces as the change increases. In a device for positioning a pen-recorder stylus the wire 70 contracts when heated inductively by a coil (80) Fig. 7 (not shown). The frequency of the coil signal is a function of the input voltage Fig. 11 (not shown). As the wire 70 contracts, member 76 is rotated about a flexible support 78 fixed to the recorder housing. Leaf spring 82 is fixed at one end 88 to the recorder housing and at the other places a strut 90 in compression. Strut 90 bears against member 76 at 92 and opposes the member 76 rotation. As the member 76 rotates, the angle it forms with strut 90 decreases and the opposing force thus decreases also. The rotation is coupled by pivot 102 and linkages 96-100 to a flexible support 104 on the housing. A spindle (110), Fig. 7 (not shown), is aligned with support 104 and connected to linkage 100. Rotation of the member 76 thus rotates the spindle (110) causing the pen-recorder stylus to be correctly positioned. If the stylus is subjected to external force e.g. by end-stops or operator error, spring 106 absorbs the energy, protecting the wire 70 from excessive stress. In the coil driver circuit, Fig. 11 (not shown), a differential amplifier has inputs from a potentiometer driven by member 76 and the input voltage. The amplifier output charges a capacitor which provides the bias voltage to transistor oscillator, thereby determining its frequency. The oscillator output drives the heating coil, until the two amplifier inputs are equal.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US23990672A | 1972-03-31 | 1972-03-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1383476A true GB1383476A (en) | 1974-02-12 |
Family
ID=22904242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB639073A Expired GB1383476A (en) | 1972-03-31 | 1973-02-09 | Positioning device using negative spring-rate tensioning means |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS497683A (en) |
AR (1) | AR199288A1 (en) |
CA (1) | CA984901A (en) |
DE (1) | DE2313240C3 (en) |
FR (1) | FR2178941B1 (en) |
GB (1) | GB1383476A (en) |
IT (1) | IT980042B (en) |
NL (1) | NL7304478A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2612307A (en) * | 2021-10-26 | 2023-05-03 | Cambridge Mechatronics Ltd | An actuator assembly |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51102789A (en) * | 1975-03-07 | 1976-09-10 | Matsushita Electric Ind Co Ltd | SAABOKAIRO |
US4197708A (en) * | 1978-06-09 | 1980-04-15 | Hochstein Peter A | Thermal energy scavenger (alternating stress limiters) |
US4197709A (en) * | 1978-06-09 | 1980-04-15 | Hochstein Peter A | Thermal energy scavenger (stress limiter) |
DE3236934A1 (en) * | 1982-10-06 | 1984-04-12 | Robert Bosch Gmbh, 7000 Stuttgart | Apparatus for achieving optimum functional adaption of control devices when they are switched on again |
DE3432134A1 (en) * | 1983-09-01 | 1985-03-21 | The Furukawa Electric Co., Ltd., Tokio/Tokyo | DEVICE FOR SWIVELING A CONTROL LEVER |
JPS6053676A (en) * | 1983-09-01 | 1985-03-27 | Furukawa Electric Co Ltd:The | Crank swinging apparatus |
JPS61178565A (en) * | 1985-02-04 | 1986-08-11 | Tokieda Naomitsu | Actuator made of shape memory alloy |
-
1973
- 1973-02-09 GB GB639073A patent/GB1383476A/en not_active Expired
- 1973-03-13 JP JP2937173A patent/JPS497683A/ja active Pending
- 1973-03-14 AR AR24704573A patent/AR199288A1/en active
- 1973-03-15 CA CA166,198A patent/CA984901A/en not_active Expired
- 1973-03-16 DE DE19732313240 patent/DE2313240C3/en not_active Expired
- 1973-03-29 IT IT4911573A patent/IT980042B/en active
- 1973-03-30 FR FR7311505A patent/FR2178941B1/fr not_active Expired
- 1973-03-30 NL NL7304478A patent/NL7304478A/xx not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2612307A (en) * | 2021-10-26 | 2023-05-03 | Cambridge Mechatronics Ltd | An actuator assembly |
Also Published As
Publication number | Publication date |
---|---|
FR2178941B1 (en) | 1976-09-10 |
JPS497683A (en) | 1974-01-23 |
AR199288A1 (en) | 1974-08-23 |
NL7304478A (en) | 1973-10-02 |
CA984901A (en) | 1976-03-02 |
FR2178941A1 (en) | 1973-11-16 |
DE2313240A1 (en) | 1973-10-11 |
IT980042B (en) | 1974-09-30 |
DE2313240B2 (en) | 1978-10-12 |
DE2313240C3 (en) | 1979-06-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |