GB731466A - Automatic sound reproducer - Google Patents
Automatic sound reproducerInfo
- Publication number
- GB731466A GB731466A GB1335/53A GB133553A GB731466A GB 731466 A GB731466 A GB 731466A GB 1335/53 A GB1335/53 A GB 1335/53A GB 133553 A GB133553 A GB 133553A GB 731466 A GB731466 A GB 731466A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- relay
- contacts
- transducer
- record
- 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
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/10—Indicating arrangements; Warning arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/487—Arrangements for providing information services, e.g. recorded voice services or time announcements
- H04M3/4872—Non-interactive information services
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
731,466. Gramophone circuits. ASSMANN GES., W. Jan. 16, 1953 [Jan. 17, 1952], No. 1335/53. Class 40 (4). [Also in Group XXXVIII] An arrangement for indicating an interruption in a sound transmission system of a magnetic sound reproducing apparatus employing disc-shaped records, comprises the use of an induced auxiliary voltage to the transducer while in its position of rest at the edge of the record, whereby in the absence of a signal from either the said auxiliary source, or from the sound record, for a duration of more than 15 seconds a relay is operated to produce an indicating signal. The starting of the apparatus is initiated by a calling voltage at terminals 32, Fig. 4, which operates a relay 31 to close contacts 30 in the circuit of the motor and open the contacts 29 in the circuit of a magnet 13 carrying an audio-frequency tone signal. The transducer 11 traverses the record until at the centre of the record it comes into contact with an adjustable stop to close contacts 36, and operate a relay 34 which opens switch 33 to release relay 31, whereupon motor contacts 30 open and contacts 29 close. The automatic mechanism returns the transducer 11, by means not shown, to its rest or starting position where the magnet 13 induces an audiofrequency in the transducer 11. The resulting signal, or the normal sound signal, is amplified by amplifier 25, and is received by a relay unit 27 which initiates an appropriate signal should there by an absence of any sound signal for a period longer than 15 seconds duration.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE312674X | 1952-01-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB731466A true GB731466A (en) | 1955-06-08 |
Family
ID=6136291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1335/53A Expired GB731466A (en) | 1952-01-17 | 1953-01-16 | Automatic sound reproducer |
Country Status (2)
Country | Link |
---|---|
CH (1) | CH312674A (en) |
GB (1) | GB731466A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2117166A (en) * | 1982-02-25 | 1983-10-05 | Staar Sa | System for detecting the operative face of a disc carrying data on one face only |
-
1953
- 1953-01-14 CH CH312674D patent/CH312674A/en unknown
- 1953-01-16 GB GB1335/53A patent/GB731466A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2117166A (en) * | 1982-02-25 | 1983-10-05 | Staar Sa | System for detecting the operative face of a disc carrying data on one face only |
Also Published As
Publication number | Publication date |
---|---|
CH312674A (en) | 1956-02-15 |
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