GB470167A - Improvements in and relating to apparatus for maintaining constant the amplitude of forced mechanical oscillations - Google Patents
Improvements in and relating to apparatus for maintaining constant the amplitude of forced mechanical oscillationsInfo
- Publication number
- GB470167A GB470167A GB1499/37A GB149937A GB470167A GB 470167 A GB470167 A GB 470167A GB 1499/37 A GB1499/37 A GB 1499/37A GB 149937 A GB149937 A GB 149937A GB 470167 A GB470167 A GB 470167A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplitude
- motor
- resistance
- contacts
- jan
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Control Of Direct Current Motors (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
470,167. Automatic control systems. SCHENCK EISENGIESSEREI UND MASCHINENFABRIK DARMSTADT GES., C. Jan. 18, 1937, No. 1499. Convention date, Jan. 18, 1936. [Class 38 (iv)] Amplitude of oscillation of material under test is maintained constant by a contact member C fixed to the mass A under test and co-operating with one or more contacts E to short circuit a resistance F for a period during each oscillation varying with the amplitude. The mass A is driven by an electric motor B so that it oscillates at a frequency just below that required for resonance. The resistance F may be in the field circuit of the motor or it may constitute the operating coil of a carbon pile or other regulator in the field circuit. In another arrangement, Fig. 8, it forms the coil Gl of a balanced relay N adapted to control a reversible motor O adjusting a resistance in series with the motor field. In order to obtain correction proportional to the amplitude, two or more contacts are used and the normal distance between the contact member and each contact is progressively increased as indicated in Fig. 5. Increasing the number of contacts reduces the load on each.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE470167X | 1936-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB470167A true GB470167A (en) | 1937-08-10 |
Family
ID=6541098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1499/37A Expired GB470167A (en) | 1936-01-18 | 1937-01-18 | Improvements in and relating to apparatus for maintaining constant the amplitude of forced mechanical oscillations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB470167A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8316711B2 (en) | 2006-08-02 | 2012-11-27 | Endress + Hauser Gmbh + Co. Kg | Apparatus for ascertaining and/or monitoring a process variable of a medium |
-
1937
- 1937-01-18 GB GB1499/37A patent/GB470167A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8316711B2 (en) | 2006-08-02 | 2012-11-27 | Endress + Hauser Gmbh + Co. Kg | Apparatus for ascertaining and/or monitoring a process variable of a medium |
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