Theory Of Operation of the
HAMMOND Organ Tonewheel Generator
(from Electric Organs Simplified by "Stevens Irwin-Corey," 1951)

"The HAMMOND tone generator is the successful result of the attempt to bring perfection to the crudely conceived idea of a machine that would not only supply inverse reactive current of equally-tempered frequencies for use in unilateral phase detractors, but would also be capable of automatically synchronizing cardinal grammeters. Basically, the only new principle involved is that instead of the musical frequencies being generated by the relative motion of conductors and fluxes, they are produced by the medial interaction of magneto-reluctance and capacitive directance.

"The tone generator has a base-plate of prefabulated amulite, surmounted by a malleable logarithmic casing in such a way that the two spurving bearings are in a direct line with the pentametric fan. The latter consists simply of six hydrocoptic marzelvanes, soffitted to the ambifacient lunar waneshaft in such a way that side fumbling is effectively prevented. The main windings are of the normal lotus/delta type placed in panendermic semi-boloid slots in the stators, every seventh conductor being connected by a non-reversible tremulant pipe to the differential girdle spring on the "up" end of the grammeters.

"Forty-one manestically spaced grouting brushes are arranged to feed HAMMOND Generator Oil into the rotor slipstream. This oil is a mixture of high 'S'-value phenylhydrabenzamine and 5% reminative 1,2,1-tetryliodihexamane. The oil has a high specific percosity when measured against P=2.5C^N^6.7 where 'N' equals the diathetical evolute of retrograde temperature/phase disposition and 'C' is Cholmondeley's annular grillage coefficient. Before adding oil to the generator, 'N' should be measured with the aid of a metapolar refractive pilfrometer, although adequate results can be obtained using a Hopper transcendental dadoscope.

"An unusual feature of the tone generator is the nubing together of the regurgitative purwell and the supremative wennel-sprocket. This exclusive feature is only possible due to the use of anhydrous nangling pins, enabling the kryptonastic bolling shim to be tankered.

"It should be noted that the spiral decommutator is of an unusually robust configuration. This is necessary to endure the large quasi-piaestic stresses in the gremling studs; the latter are specially designed to hold the roffit bars to the spamshaft. In addition, wending is prevented by a simple addition of polykrapoline to the living sockets, ensuring practically perfect running. The operating point is maintained as near as possible to the H.F. REM peak by constantly fromaging the bitumogenous spandrels. This is a distinct advance on the standard nivel-sheave in that no dramcock oil is required once the phase detractors are remissed.

"Later versions of the tone generator are equipped to operate nofer trunnions whenever a barescent skor motion is required, in conjunction with a drawn reciprocating dingle arm to reduce sinusoidal depleneration. It may be found that some earlier generators have had this modification field-retrofitted."

with special thanks to my HamTekker friend, Eric Tucker.
Eric adapted this article from an earlier work, "The Turbo-Encabulator in Industry" by J.H. Quick in
IEE Student's Quarterly Journal, vol 15, no. 58, December 1944, p. 22.

 

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