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Pile de Grenet (Pile Bichromate) - Chromic acid cell, Pila, Chromsäure-Element

Pile de Grenet - Chromic acid cell, Pila, Chromsäure-Element ; Grenet, Eugène fils; (ID = 2311045) Power-S
 
Pile de Grenet - Chromic acid cell, Pila, Chromsäure-Element ; Grenet, Eugène fils; (ID = 2311046) Power-S
 
Pile de Grenet - Chromic acid cell, Pila, Chromsäure-Element ; Grenet, Eugène fils; (ID = 2311047) Power-S
 
Pile de Grenet - Chromic acid cell, Pila, Chromsäure-Element ; Grenet, Eugène fils; (ID = 2311033) Power-S
Pile de Grenet - Chromic acid cell, Pila, Chromsäure-Element ; Grenet, Eugène fils; (ID = 127518) Power-S Pile de Grenet - Chromic acid cell, Pila, Chromsäure-Element ; Grenet, Eugène fils; (ID = 556593) Power-S
Pile de Grenet - Chromic acid cell, Pila, Chromsäure-Element ; Grenet, Eugène fils; (ID = 557036) Power-S Pile de Grenet - Chromic acid cell, Pila, Chromsäure-Element ; Grenet, Eugène fils; (ID = 2000809) Power-S
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Pile de Grenet - Chromic acid cell, Pila, Chromsäure-Element ; Grenet, Eugène fils; (ID = 127518) Power-S
Grenet, Eugène fils;: Pile de Grenet - Chromic acid cell, Pila, Chromsäure-Element [Power-S] ID = 127518 486x500
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For model Pile de Grenet (Pile Bichromate) - Chromic acid cell, Pila, Chromsäure-Element, Grenet, Eugène (fils); Paris:
Originali Pile di Grenet nella Versione da lt.1 e da 1/2lt., la tensione emmessa era di 1,8V, interessante il sistema che dava tensione solamente quando lo zinco era sommerso, altrimenti quando non serviva si teneva sollevato.
 
Country:  France
Manufacturer / Brand:  Grenet, Eugène (fils); Paris
Year: 1859 ?? Category: Power supply/conditioner or battery or charger 
Wave bands - without
Details
Power type and voltage Is a battery or storage battery / 2,06 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Radiomuseum.org Model: Pile de Grenet - Chromic acid cell, Pila, Chromsäure-Element - Grenet, Eugène fils; Paris
Material Various materials
Shape Miscellaneous shapes - described under notes.
Notes

La Pile de Grenet au bichromate de potasse, dite pile bouteille, a été développé basé sur la Pile Poggendorff de 1842, par M. Eugène Grenet vers 1850 environ.

M. Grenet a donné cette pile la forme d'une bouteille sphérique. L'électrode positive se compose de deux lames de charbon; l'électrode négative, composé d'une seule lame de zinc amalgamée, est portée par une tige munie d'une glissière.

Emile Barrault présenté une pile électrique système Grenet dans la Séance du 16 Juillet 1858 à la Société des Ingénieurs Civils. Un brevet a été publié en Septembre 1859 pour les piles système Grenet (États-Unis No. 25,503, voir documents)

La pile bouteille a été produit par des fabricants différentes dont Péricaud, Paul Rousseau et Cie, Ducretet et Lejeune (Pile à Treuil) et beaucoup d'autres sociétés, jusqu'au début du 20ème siècle. Il a été encore ameloiré par M. Gaiffe (Pile Gaiffe 1er et 2e modèle).

Généralement, la pile Grenet était disponible en différentes tailles : 0.5, 0.75, 1.0, 1.5 et 2 litres, ainsi que de plus grandes tailles de 4 et 6 litres.

La force electromotrice d'un élément est nominalement de 2.06 V, mais varie entre 1.92 et 2.20 volts.


The Grenet cell uses diluted sulphuric acid as electrolyte and chromatic acid as depolariser. The substances were physically mixed together, eliminating the porous pot used by Poggendorff.

The positive electrode (cathode) consists of two carbon plates, with a zinc plate (negative or anode) positioned between them. Because of the tendency of the acid mixture to react with the zinc, a mechanism is provided to raise the zinc electrode clear of the acids when the cell is not in use. Current can be limited with a variable elevation of the zinc electrode, recuding the contact area.

The cell provides a nominal charge of 2.06 Volts. It proved popular with experimenters for many years due to its relatively high voltage, greater ability to produce a consistent current and lack of any fumes. This cell was preferred by Edison for his experiments with electricity.

Commonly referred to as chromic acid cell, it was also called bichromate cell. Chromatic acid being difficult to obtain on the market, a mixture of potassium bichromate and sulfuric acid was used to react to the required chomic acid.

Chemically, the action of the cell is presented by the following equation:

3Zn + K2Cr2O7 + 7H2SO4 = Cr2(SO4)3 + 7H2O + K2SO4 + 3ZnSO4

where the reduction reaction Cr2O7 2- + 5 H2O + 14 H+ + 6 e- ↔ 2 Cr(OH)6 3+ and an oxidation reaction 3 Zn <---> 3 Zn3+ + 6 e- can be summed to the redox reaction:

Cr2O7 2- + 3Zn + 5H2O + 14 H+ ↔ 2Cr(OH)6 3+ + 3Zn 3+

Mentioned in Traité Pratique d'Électricité, Félix Lucas, 1892
Literature/Schematics (1) US Patent Office, Patent No. 25,503, Sep. 1859

Model page created by Rino Ferro † 2008. See "Data change" for further contributors.



All listed radios etc. from Grenet, Eugène (fils); Paris
Here you find 1 models, 1 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.


Collection of a member from CH


  
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