[CW] Bunnell Double Speed Key (Sideswiper)

[David J. J. Ring, Jr.]

Roye M.Wood from Chicago, Ill applied for a patent on 1904-05-09 and received a patent (US776160A) for a horizontally operated leg key that had a unique spring tension adjustment for its lever on 1904-11-29.

This is the first type of Double Speed Key.

Originally,theDouble Speed Key was offered in three patterns:  leg, legless, and portable.The portable pattern sold for $6.50 and came with a cord and wedge (and later a  base) with the idea  it could be carried to work by a telegrapher just like a bug.

SEE John Casale W2NI's paper on it https://www.dropbox.com/s/b2dvs34mkd17c2d/bunnell_dsk_research.pdf?dl=0

The DSK manufactured in the late 1970s had the flat circuit closer as you have, the older DSK keys from the early years have the "bishop" type of circuit closer.

See photos of the last DSK's made by J. H. Bunnell here:

https://www.dropbox.com/sh/rc4pdvl7xeffl5e/AABCVMRWl6R_ZGuQCZuO--mXa?dl=0

73

DR
N1EA