GB655942A - Improvements in or relating to electric pick-ups for use in instruments for indicating or recording mechanical displacement, velocity or acceleration - Google Patents
Improvements in or relating to electric pick-ups for use in instruments for indicating or recording mechanical displacement, velocity or accelerationInfo
- Publication number
- GB655942A GB655942A GB19269/47A GB1926947A GB655942A GB 655942 A GB655942 A GB 655942A GB 19269/47 A GB19269/47 A GB 19269/47A GB 1926947 A GB1926947 A GB 1926947A GB 655942 A GB655942 A GB 655942A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acceleration
- velocity
- electric pick
- crystal
- coil
- 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
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
Abstract
655,942. Electric pick-ups. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. July 18, 1947, No. 19269. Convention date, July 22, 1946. [Class 40 (iv)] An electric pick-up for indicating or recording the instantaneous displacement, velocity or acceleration of vibrating parts comprises an electromechanical transducer and a feedback mechanico - electrical transducer to reduce errors caused by conditions such as fre-. quency or temperature. A crystal 21, Fig. 3, feeds an amplifying valve 30, part of the output of which energizes a moving coil 27 rigidly connected to a rod 22 connected to the crystal, the force exerted by the coil enhancing the effect of the elasticity of the crystal, whereby compensation is made for temperature. In Fig. 4, the output of a moving coil 41 is fed to an amplifying valve 45, the anode circuit of which feeds a second moving coil 42 to damp the velocity of displacement of the first coil, the output across the resistance 47 being proportional to the acceleration of the system relative to the housing. The feed-back increases the range of frequencies at which the device will operate satisfactorily.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL655942X | 1946-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB655942A true GB655942A (en) | 1951-08-08 |
Family
ID=19795233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19269/47A Expired GB655942A (en) | 1946-07-22 | 1947-07-18 | Improvements in or relating to electric pick-ups for use in instruments for indicating or recording mechanical displacement, velocity or acceleration |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB655942A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4322829A (en) * | 1980-09-11 | 1982-03-30 | Dynamic Systems, Inc. | Fiber optic accelerometer and method of measuring inertial force |
-
1947
- 1947-07-18 GB GB19269/47A patent/GB655942A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4322829A (en) * | 1980-09-11 | 1982-03-30 | Dynamic Systems, Inc. | Fiber optic accelerometer and method of measuring inertial force |
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