Sumter Telephone Mfg. Co split shaft desk set


split shaft (Sumter Telephone Manufacturing Company)
Sumter Telephone Manufacturing Company
Excellent, original condition


This is another slightly different Sumter split shaft model. It has a larger, unmarked transmitter and a very rare Sumter receiver with the unique ridge around the middle. If you remove the two screws on the top ring (just below the transmitter) the shaft will split into two pieces. The patent on this desk stand includes the design for 3 different versions. Its purpose was to provide the portable telephone with a casing surrounding the central core and enclosing the switching apparatus which could be moved to expose the switches without interfering with the working parts. The preferred design was the split shaft.


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