BE358214A - - Google Patents
Info
- Publication number
- BE358214A BE358214A BE358214DA BE358214A BE 358214 A BE358214 A BE 358214A BE 358214D A BE358214D A BE 358214DA BE 358214 A BE358214 A BE 358214A
- Authority
- BE
- Belgium
- Prior art keywords
- adjustment
- eliminator
- vary
- frequency
- machine
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/22—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with tubes only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
- H04R3/08—Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Control Of Amplification And Gain Control (AREA)
Description
<Desc/Clms Page number 1>
EMI1.1
" PERFECT IOID#JI,iENTS AUX SY STEJ\!1ES A1'IPLIFI CATEURSe" If
La présente addition vise des appareils commandant le volume des sons émis par un appareil reproducteur, par exemple un haut-parleur, pouvant reproduire les sens enregistrés sur des disques phonographiques- Les appareils utilisés actuellement dans ce but dans les ensembles décrits dans le brevet principal et dans, ses additions précédentes, comportent un transformateur élé- vateur à fréquence audible et un "éliminateur de bruits d'aiguille" compor- tant une bobine de choc et un condensateur montés dans une enveloppe appropriée, et noyés par exemple dans la cire- Cet éliminateur de bruits est généralement
<Desc/Clms Page number 2>
essayé et disposé de façon à fonctionner dans certaines limites, avant d'être définitivement fermé- On a trouvé que les éliminateurs ainsi établis,
tout en donnant de bons résultats sur certaines machines, ne fonctionnent pas de ma- nière satisfaisante sur d'autres, parce que les fréquences à éliminer ne tombent pas toujours dans les limites pour lesquelles on a établi l'élimina- teur-
La présente invention a pour objet de surmonter cette difficulté et, dans ce but, elle couvre une forme appropriée d'éliminateur qu'on peut régler en vue des appareils reproducteurs qu'il s'agit de desservir- L'inven- tion comporte plus spécialement un éliminateur de bruits comprenant un trans- formateur ordinaire en combinaison avec un condenseteur variable ou une badine de chocs pourvue d'un noyau magnétique réglable- Dans le cas d'un condensateur variable, on règle le dispositif à la demande de la machine à désservir,
et on le fixe dans la position de réglage la mieux appropriée* Dans le cas d'une bobine réglable, on règle le noyau pour répondre aux besoins de la machine, et on fixe ce réglage, après vérification.
<Desc / Clms Page number 1>
EMI1.1
"PERFECT IOID # JI, iENTS AUX SY STEJ \! 1ES A1'IPLIFI CATEURSe" If
The present addition is aimed at devices controlling the volume of sounds emitted by a reproducing apparatus, for example a loudspeaker, capable of reproducing the senses recorded on phonographic records. The apparatus currently used for this purpose in the sets described in the main patent and in, its previous additions, comprise an audible frequency step-up transformer and a "needle noise eliminator" comprising a shock coil and a capacitor mounted in a suitable casing, and embedded for example in wax. noise eliminator is generally
<Desc / Clms Page number 2>
tested and arranged so as to operate within certain limits, before being definitively closed - It was found that the eliminators thus established,
while giving good results on some machines, do not work satisfactorily on others, because the frequencies to be eliminated do not always fall within the limits for which the eliminator has been established.
The object of the present invention is to overcome this difficulty and, to this end, it covers a suitable form of eliminator which can be adjusted for the reproductive systems which it is a question of serving. especially a noise eliminator comprising an ordinary transformer in combination with a variable capacitor or a shock bar provided with an adjustable magnetic core - In the case of a variable capacitor, the device is adjusted at the request of the machine. serve,
and fixed in the most appropriate adjustment position * In the case of an adjustable spool, the core is adjusted to meet the needs of the machine, and this adjustment is fixed, after verification.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12977A US1728879A (en) | 1925-03-03 | 1925-03-03 | Amplifying system |
GB502528 | 1928-02-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE358214A true BE358214A (en) |
Family
ID=26239543
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE358214D BE358214A (en) | 1925-03-03 |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE358214A (en) |
-
0
- BE BE358214D patent/BE358214A/fr unknown
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