GB693161A - Improvements in and relating to electro-mechanical transducer units - Google Patents
Improvements in and relating to electro-mechanical transducer unitsInfo
- Publication number
- GB693161A GB693161A GB7787/47A GB778747A GB693161A GB 693161 A GB693161 A GB 693161A GB 7787/47 A GB7787/47 A GB 7787/47A GB 778747 A GB778747 A GB 778747A GB 693161 A GB693161 A GB 693161A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystal
- harness
- electro
- canister
- pick
- 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
- 239000013078 crystal Substances 0.000 abstract 8
- 229920001971 elastomer Polymers 0.000 abstract 4
- 239000000806 elastomer Substances 0.000 abstract 3
- 239000000945 filler Substances 0.000 abstract 3
- 239000000463 material Substances 0.000 abstract 3
- 241001422033 Thestylus Species 0.000 abstract 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 abstract 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 abstract 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 abstract 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 abstract 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 abstract 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical group CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 abstract 1
- AUBDSFLQOBEOPX-UHFFFAOYSA-N hexa-1,5-dien-3-yne Chemical group C=CC#CC=C AUBDSFLQOBEOPX-UHFFFAOYSA-N 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 239000004014 plasticizer Substances 0.000 abstract 1
- 229920001084 poly(chloroprene) Polymers 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 229920000915 polyvinyl chloride Polymers 0.000 abstract 1
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 235000011006 sodium potassium tartrate Nutrition 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Moving Of Heads (AREA)
- Liquid Crystal (AREA)
- Position Input By Displaying (AREA)
Abstract
693,161. Pick-up mountings. BRUSH DEVELOPMENT CO., and LYNCH, T. E. Feb. 17, 1948 [March 21, 1947], No. 7787/47. Class 40 (ii) [Also in Groups XXXIX and XL(b)] In an electro-mechanical transducer employing a flexing type multiplate crystal element 13, Fig. 1, the' end of the crystal remote from the front drive end is free from rigid engagement with the housing which is fitted with a resilently yielding material 18 to provide a mounting exerting predomiriantly a stiffness force against the flexing of the element at lower frequencies. The stylus holder 15 passes through a rubber grommet 14 in the' case 10 and is connected to the crystal by a yoke 9. In a more practical embodiment, Figs. 2 and 3, the crystal 29 is restrained against cold flow in the filler material by a harness comprising legs 40, 41, and a cross bar 46 in which it is free to pivot. The pivots 33, 34 engage in detents 72, 73 on the base plate and harness respectively. The stylus holder 90 is pushed into a quill 35 attached to the crystal element and is supported in a notch 94 of a stylus guard 60 which is formed on an extension of the harness base. Bearings 82, 83 on the guard prevent damage to the pick up by heavy handling. Suitable resiliently yielding fillers include plasticized polyvinyl resins and rubber-like plastic elastomers, particular reference being made to an elastomer made by copolymerizing vinyl chloride and vinyl acetate and dispersing the resultant resin in a plasticizer such as dibutyl or dioctyl phthalate. The crystal assembly is inserted in a canister 85 (Fig. 5) which is filled with the filler in its liquid state until the upper disc 50 of the base engages a shoulder 86 of the canister. Extensions 55, 56 of the legs 40 provide the electrical connection. The crystal used may be of Rochelle salt or primary ammonium phosphate but the former may be precluded if it cannot withstand the temperature required for polymerization of the elastomer. Prior to assembly the crystal is dipped in divinyl acetylene neoprene to protect it from attack by the mounting material 18. Specification 562,803 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US693161XA | 1948-03-31 | 1948-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB693161A true GB693161A (en) | 1953-06-24 |
Family
ID=45592840
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7787/47A Expired GB693161A (en) | 1948-03-31 | 1947-03-21 | Improvements in and relating to electro-mechanical transducer units |
| GB19776/51A Expired GB693204A (en) | 1948-03-31 | 1948-02-17 | Improvement in electromechanical transducer unit |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19776/51A Expired GB693204A (en) | 1948-03-31 | 1948-02-17 | Improvement in electromechanical transducer unit |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB693161A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2120446A (en) * | 1982-04-08 | 1983-11-30 | Rca Corp | Holding apparatus for a disc record signal pickup stylus |
| US4441176A (en) * | 1982-04-08 | 1984-04-03 | Rca Corporation | Damping mechanism for a video disc stylus holder |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3691316A (en) * | 1969-05-09 | 1972-09-12 | Matsushita Electric Ind Co Ltd | Semiconductor stress transducer |
-
1947
- 1947-03-21 GB GB7787/47A patent/GB693161A/en not_active Expired
-
1948
- 1948-02-17 GB GB19776/51A patent/GB693204A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2120446A (en) * | 1982-04-08 | 1983-11-30 | Rca Corp | Holding apparatus for a disc record signal pickup stylus |
| US4441176A (en) * | 1982-04-08 | 1984-04-03 | Rca Corporation | Damping mechanism for a video disc stylus holder |
Also Published As
| Publication number | Publication date |
|---|---|
| GB693204A (en) | 1953-06-24 |
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