United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 43
x and means for 85progressively moving the same when in itsoperative position, of a return-screw shaft, alifting-cam traveling back and forth on thereturn-s.crew shaft, and means rotating withsaid shaft for operating said cam, substan- 90tially as set forth. This specification signed and witnessed… … JO
Phonograph · Patents
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