P.R. Mallory & Co. 1932 Schematic

P.R. Mallory & Co. 1932

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Product Information:
Manufacturer:P.R. Mallory & Co. (Elkon)

Schematic Pages

PNG: Page 1 Rider Manual Volume 5

Schematics Content

Page 1:

Directions for Servicing 1932 Type Mallory'Single - Reed'

The 1932 type Mallory Elkonode is a half-wave, single-reed converter used with a BR Raytheon tube for rectification. This Elkonode is supplied in six standard types from 1 to 6 inclusive and modifications are supplied for special requirements, such as S101, S102, S103, T112, and S111. 12 - volt single-reed Elko nodes are supplied in types GI to G6 inclusive, and 32 - volt Elkonodes in types from F1 to F6 inclusive.
The mechanical construction of the single-reed Elkonode is the same in all types with the exception of the size and number of turns of wire on the Elkonode coil. Following is a table of characteristics indicating the output obtainable from these standard Elkonodes:

The following reproductions picture the Mallory single-reed Elkonode in two positions:

(1) is a side view showing the Elkonode with cover and rubber cushion removed. (2) is a front view with can and cushion removed. Numbered arrows clearly indicate the position of the Elkonode parts involved in installing new contact spring assemblies and new reed assemblies.

Routine for Dismantling Elkonodes for the Purpose of Replacing Contact and Reed Springs

(a) Remove screws which fasten outer housing or can to base.

(b) Hold can in upright position and tamp gently against hand permitting base and rubber housing inside of can to drop out gently. (CAUTION: Do not attempt to remove Elkonode assemblies from cans by pulling on the base.)

(c) Remove rubber cushion from Elkonode assembly in the same manner as entire assembly was removed from can.


(d) Remove contact spring assembly by extracting screws at point marked "A" on above diagram.

(e) Remove reed assembly by extracting screws at point marked "B" on above diagram.

(f) Install reed assembly, using care to insure that metal blocks in which this reed is mounted are squarely aligned.
NOTE: Use only Kester Resin Core Solder.

(g) Install contact spring assembly using care to properly align metal blocks in which this spring assembly is mounted.

(h) Inspect alignment of contact points to insure that contacts on both reed and contact springs are in proper alignment, and that their surfaces engage squarely and evenly. Alignment of these points is controlled by the position of the springs, and the screws mounting these springs should not be tightened firmly until the points are in alignment.

(i) With points in proper alignment, the air-gap or clearance between pole-piece of the coil and reed should be adjusted to approximately 1/32 inch. This adjustment is provided for by the cam nut and locking screw at point marked "6" in diagram
2. The reed should be in a perfectly perpendicular plane, and the surface of the pole-piece or core of the coil should be exactly parallel with surface of reed.