GB372176A - Improvements in optical indicating devices for use with echo sounding apparatus - Google Patents
Improvements in optical indicating devices for use with echo sounding apparatusInfo
- Publication number
- GB372176A GB372176A GB21431/31A GB2143131A GB372176A GB 372176 A GB372176 A GB 372176A GB 21431/31 A GB21431/31 A GB 21431/31A GB 2143131 A GB2143131 A GB 2143131A GB 372176 A GB372176 A GB 372176A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- ray
- echo
- slit
- emission
- 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
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
372,176. Echo-sounding apparatus. MARTI, P. A. D., Montbeliard, Doubs, France. July 27, 1931, No. 21431. Convention date, Aug. 4, 1930. [Class 118 (ii).] Optical indicating means for use with echosounding apparatus comprises a device in which a luminous ray sweeps across a screen, the ray being narrow in the direction of sweeping and long in the perpendicular direction, a small part only of the ray normally impinging on the screen, but on the emission of the sound and on the return of the echo a greater part of the ray is allowed to fall on the screen. Light from a lamp 1 passes through a lens 2, a slit 3 in a screen 4 and a lens 6 on to a screen 5. The ray is caused to sweep across the screen 5 by the interposition of a rotating mirror or by other known means. All but a small portion of the slit 3 is normally obscured by a shutter 7 pivoted at 9, but on the emission of a sound and on the return of the echo the shutter swings aside to expose all the slit. The distance between the resulting two light spots is a measure of the required depth. In a modification, a circular screen 5 is provided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR714694T | 1930-08-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB372176A true GB372176A (en) | 1932-05-05 |
Family
ID=9088203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21431/31A Expired GB372176A (en) | 1930-08-04 | 1931-07-27 | Improvements in optical indicating devices for use with echo sounding apparatus |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR714694A (en) |
| GB (1) | GB372176A (en) |
-
1930
- 1930-08-04 FR FR714694D patent/FR714694A/en not_active Expired
-
1931
- 1931-07-27 GB GB21431/31A patent/GB372176A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR714694A (en) | 1931-11-18 |
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