US2229810A - Mounting for carbon collectors - Google Patents

Description

jan. 2S, 194k. F. I EucHs MOUNTING FOR CARBON COLLECTORS Filed May l2, 1939 E LZ MMMM Z CA RB ON A [fom e y Patented Jan. 28, 1941 UNITED STATES PATENT OFFICEv MOUNTING FOR CARBON COLLECTORS Friedrich Leuchs, Nuremberg, Germany, assigner to the iirm C. Conradty, Nuremberg, Germany Application May 12, 1939, Serial No. 273,367 In Germany July 1, 1938 9 Claims. (C1. 1231-55) A variety of mountings for carbon collectors, Fig. 3 shows a side View of the mounting more particularly bow collectors, are known, the mounted upon a curved carbon collector element. aim of which is., to give the carbon sliding ele- Fig. 4 is a sectional View taken upon the SeC- ment the greatest possible strength to resist tion line Z-Z of Fig- 3- bending and shocks. It has, for instance, already Fig. 5 is a cross-sectional View showing metal been proposed to slide a mounting on to the base strips eXtending along the Sides 0f the mounting, of the carbon element and to ll the space beand tween the mounting and the carbon element by a Fig. 6 is a side view illustrating the metal strips casting operation, or to enclose the whole base of merging intov the Solid Supporting elements. 10 the carbon element by a casting or spraying op- A Straight, drawn 0r Cast DlOle InOU-Iltihg a, 10

eration or, after coppering the carbon element, to the height b 0f the dovetail of which is smaller solder it directly to the mounting. The methods than the height C Of the dOVetail 0f the Carbon enumerated have at least to some extent the ef- @OlieCtOI element d. iS fllSt 0f all PIOVded in the fect of considerably increasing the resistance to upper Delt, `that iS in the dOVetefil DTOe b, With fracture, but each of these methods involves more notch-like saw cuts extending dOWn t0 the base 15 or less great difculties for the manufacture, as a Plate e. The Seme DIOCedill'e is OllOWed aS recondition for an increase of the strength is as ingeldS the reinfOlCng rib f, provided in this CaSe, timate and flssureless as possible an adhesion of l which iS also Cut With a SaW down t0 the base the carbon element to the mounting. Carbon plate e This InOllnting Which is in the irSt incollector elements are of coarse ceramic products Stance Straight een then be slipped 0n t0 e Calhn 20 and as such are subject during firing to certain collector element d of any CuI'Vatilre and Will shrinkage conditions, the effect of which is, that then, owing to its own elasticity fit closely against the curvature of such collectors is not always the the base 7C 0f the bow-Shaped CarbOn COlleCtOr same, being in fact always slightly different. For element. The notches h of the side walls will this reason it is necessary to make a slip-on open and the notches of the foot f will close, 25 mounting for each individual carbon collector while the mounting is being slipped on. The element and to fit it accurately to the curvature slipped-0n mOnnting a iS thereupon encased by of the same. This applies even to the mounting Casting 0r Spraying along the two notched side which is cast round the carbon element and walls b with a metal in such a manner that the which,whenthe casting mould is suitably shaped, widened SlitS h produced by nOtChing are lled 30 should accurately fit the carbon element. Since, in and in addition are firmly cOnneCted together however, the shrinkage of the cooling metal tends over the entire length Gf the Collector. Thus to crush the carbon element, an accurate fit of there extend along the mounting Proper strong the mounting cannot be ensured even with this metal strips g which on both ends of the carbon method; Attempts have been made to avoid this collector element merge into solid supports i 35 latter disadvantage, by inserting in the lateral which are formed by casting or spraying. shrinkage path at the base of the carbon element The mounting has the advantage, that it is no elastic pads which are intended to take up and longer put under pressure and crushed through annul the shrinkage pressure. This method is the lateral shrinkage of the metal, as shrinkage however also very complicated and can be cartransversely directed to the pronle of thecollector 40 ried out only with costly moulds and requires element is made impossible by the slipped-on considerable manufacturing experience. mounting a, whilst the laterally cast-on or The invention provides a mounting which ensprayed part g of the mounting becomes rmly ables every bow collector of any curvature to be and well connected both with the carbon element fitted in a simple manner with an absolutely seand also with the slipped-on mounting, thus con- 45 curely seated mounting. necting the two with one another. The cast-on As most external mountings are slipped on in or sprayed end pieces i are securely and firmly a dovetail-like manner and the mountings are connected with one another by the lateral castmade partly with and partly Without reinforcing on or sprayed mounting strips g and these end ribs, a dovetail mounting with a reinforcing rib pieces also connect the two lateral strips me- 50 shall now be described by way of example. chanically and electrically. The collector ele- Fig. 1 is a side View of a drawn or cast prole ment is thus as it were embraced at its base both mounting. by the slipped-on mounting and by a cast-on or Fig. 2 is an end View thereof taken on section sprayed frame. In addition to this connection,

line X-X of Fig, 1. however, there is the special advantage, that the 53 metal of the lateral strips g, applied by casting or spraying, combines more rapidly with the already slipped on mounting. a than with the carbon element d and shrinks towards the metal. The dovetail base of the carbon element is in this way firmly shrunk into the slipped on mounting.

Any very fine spaces left between the bottom Ic of the carbon collector element and the slippedon mounting may be filled in by casting according to a known method. A mass for this purpose, which is preferably electrically conductive, will penetrate into all the nest interstices between the inside of the mounting and the carbon element and will connect them mechanically and electrically to form a single body. The mass used for this purpose may alternatively act as an insulator, as the current supply will nevertheless be maintained. Masses of this kind are for instance quickly setting cements and more particularly sulphur. The reinforcing rib is welded, soldered or otherwise connected at its edge I which is closed by the rib being bent to a curve.

What I claim is:

l. An external mounting for carbon collector elements of any curvature, having lateral holding strips for the carbon element, containing saw cuts or notches in the transverse direction to the axis of the curved collector element.

2. An external mounting for carbon collector elements of any curvature, having lateral holding strips for the carbon element, containing saw cuts or notches inthe transverse direction to the axis of the curved collector element, the height of the lateral holding strips being less than the height of the base part of the carbon element.

3. An external mounting for carbon collector elements of any curvature, having lateral holding strips for the carbon element, containing saw cuts or notches in the transverse direction to the axis of the curved collector element, and having a reinforcing rib which is provided before the mounting is slipped on to the carbon element with saw cuts or notches.

4. An external mounting for carbon collector elements of any curvature, having lateral holding strips for the carbon element, containing saw cuts or notches in the transverse direction to the axis of the curved collector element and having metal applied by a casting or spraying operation to the mounting after it has `been slipped on to the curved carbon element along the lateral holding strips so as to extend upwards to the top of the base portion of the carbon element and downwards below the bottom edge of the mounting.

5. An external mounting for carbon collector elements of any curvature, having lateral holding strips for the carbon element, containing saw cuts or notches in the transverse direction to the axis of the curved collector element and having metal applied by a casting or spraying operation vto the mounting after it has been slipped on to the curved carbon element along the lateral holding strips so as to extend upwards to the top of the base portion of the carbon element and downwards below the bottom edge of the mounting.

6. An external mounting for carbon collector elements of any curvature, having lateral holding strips for the carbon element, containing saw cuts or notches in the transverse direction to the axis of the curved collector element and having metal applied by a casting or spraying operation to the mounting after it has been slipped on to the curved carbon element along the lateral holding strips so as to extend upwards to the top of the base portion of the carbon element and downwards below the bottom edge of the mounting, and at the two ends of the mounting to form end supports for the carbon element.

'7. An external mounting for carbon collector elements of any curvature, having lateral holding strips for the carbon element, containing saw cuts or notches in the transverse direction to the axis of the curved collector element, and having a reinforcing rib which is provided before the mounting is slipped on to the carbon elementl with saw cuts or notches, the saw cuts or notches being connected again, after the mounting has been slipped on, by welding.

8. An external mounting for carbon collector elements of any curvature, having lateral holding strips for the carbon element, containing saw cuts or notches in the transverse direction to the axis of the curved collector element, and having a reinforcing rib which is provided before the mounting is slipped on to the carbon element with saw lcuts or notches, the saw cuts or notches being connected again, after the mounting has been slipped on, by soldering.

`9. An external mounting for carbon collector elements of any curvature, having lateral holding strips for the carbon element, containing saw cuts or notches in the transverse direction to the axis of the curved collector element, and having a reinforcing rib which is provided before the mounting is slipped on to the carbon element with saw cuts or notches, the saw cuts or notches being connected again, after the mounting has been slipped on, by metal being applied to the rib by la casting or spraying operation.

FRIEDRICH LEUCHS.

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