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The Brass Frame Type J-38

In these pictures you can see the cast frame of brass which is not plated or painted, and does not have a bulge with a well at the front of the key to hold the bottom of the spring. The spring is held by a lip that is attached under the anvil, is bent down toward the base, and then bent back to horizontal to hold the spring. Other characteristics of this type vary greatly from key to key. The key shown here has angled knurling on the lock nuts, and unusual rear binding posts. (The eye screw is missing from this key.)

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Notice the binding posts on these two brass frame keys. My theory is that these binding posts are stock items from some other electrical device or older type of key.



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These pictures show the base of two rare variations of the Brass Frame type, with the words "Type J-38" (left) and "Key.Type J-38 (right) on the front of the base under the operating knob.

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This same "Type J-38" key (above left) also has "USSC" cast into the back of the frame. (The circuit closing switch and eye screw are missing on this key.)


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