GB711323A - Improvements in or relating to electrical recording apparatus - Google Patents
Improvements in or relating to electrical recording apparatusInfo
- Publication number
- GB711323A GB711323A GB2062552A GB2062552A GB711323A GB 711323 A GB711323 A GB 711323A GB 2062552 A GB2062552 A GB 2062552A GB 2062552 A GB2062552 A GB 2062552A GB 711323 A GB711323 A GB 711323A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stylus
- paper
- recording apparatus
- contacts
- density
- 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
- 230000035945 sensitivity Effects 0.000 abstract 3
- 241001422033 Thestylus Species 0.000 abstract 2
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
- G01D15/06—Electric recording elements, e.g. electrolytic
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Recording Measured Values (AREA)
Abstract
711,323. Recording apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. April 1, 1953 [Aug. 15, 1952], No. 20625/52. Class 106 (4). [Also in Group XXXVIII] An electro-sensitive recording apparatus suitable for use in conjunction with echo sounders and other cyclically operated devices includes means for automatically changing in successive cycles of operation the effective sensitivity of the recorder, the changes of effective sensitivity being themselves repeated cyclically. It is stated that dry electro-sensitive recording paper will give a density of indication proportional to the applied current over a range of about 6db other factors being constant but that graduations in density corresponding to current variations of 14 db or more are desirable for echo sounding records. The present invention is arranged to provide a greater range than the normal 6 db and the embodiment described comprises a recorder whose sensitivity is changed between two values at the end of each cycle of operation. It is shown with reference to the graphs of Figs. 1 and 2 (not shown) that the apparent mark density can be made proportional to the applied current over a greater range by this means. A stylus. on the end of an arm 4 is rotated to pass across the slowly moving recording paper 5 once during each cycle and contacts 3 operated by cam 2 on the driving shaft are arranged to trigger the echo sounding transmitter of equivalent device when the stylus crosses the zero line on the paper. Shaft 1 drives through gearing 7, 8, a shaft 9 rotating at half speed and carrying a cam 10 which closes contacts 11 for one rotation of the stylus and opens them for the next. When closed the contacts short circuit resistor 12 in the cathode circuit of variable Á amplifying valve 14 in the echo sounding receiver. The change of gain should preferably be made equal to the tone range of the paper that is about 6 db.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2062552A GB711323A (en) | 1952-08-15 | 1952-08-15 | Improvements in or relating to electrical recording apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2062552A GB711323A (en) | 1952-08-15 | 1952-08-15 | Improvements in or relating to electrical recording apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB711323A true GB711323A (en) | 1954-06-30 |
Family
ID=10149026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2062552A Expired GB711323A (en) | 1952-08-15 | 1952-08-15 | Improvements in or relating to electrical recording apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB711323A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1270452B (en) * | 1964-01-10 | 1968-06-12 | Electroacustic Gmbh | Echosounder for evaluable recording of echoes, the amplitudes of which are of very different sizes |
-
1952
- 1952-08-15 GB GB2062552A patent/GB711323A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1270452B (en) * | 1964-01-10 | 1968-06-12 | Electroacustic Gmbh | Echosounder for evaluable recording of echoes, the amplitudes of which are of very different sizes |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2009459A (en) | Distance and depth finding | |
GB663772A (en) | Magnetic recording devices | |
US2408458A (en) | Apparatus for echo distance measurement | |
SE8008852L (en) | DEVICE FOR SEATING TRANSMISSION PARAMETERS | |
US1917268A (en) | Multiple frequency receiving system | |
GB711323A (en) | Improvements in or relating to electrical recording apparatus | |
US2710787A (en) | Apparatus for indicating and recording time intervals | |
US3991628A (en) | Level meter for sound signals | |
US2509215A (en) | Radiosonde | |
US2429229A (en) | Analysis and representation of complex waves | |
GB756294A (en) | Error sensing arrangement for magnetic writing devices | |
US2655425A (en) | Electrocardiograph | |
US2323317A (en) | Altitude measuring | |
US2309956A (en) | Apparatus for depth measurement | |
US2647813A (en) | Polar chart recorder | |
ES412608A1 (en) | Device for detecting variations in a physical characteristic of a wheel | |
US2521881A (en) | Audio-frequency recorder | |
US2702227A (en) | Recording device with accumulator roll | |
SU957126A1 (en) | Method and device for measuring damping | |
GB764184A (en) | Improvements in or relating to electric signal circuits and to echo-ranging systems employing such circuits | |
GB715595A (en) | Apparatus for the checking and maintenance of the synchronism of two processes which are proceeding at the same time, especially in sound film apparatus | |
SU71161A1 (en) | Radiosonde | |
GB661201A (en) | Improvements relating to equipment for measuring the speed of rotation of rotating apparatus | |
JPS5326642A (en) | Graphic equ alizer | |
GB730206A (en) | Improvements in or relating to echo-sounding apparatus |