This heart novelty and relaxation device has a heart-shaped housing that
contains a speaker and circuitry for producing a slow heartbeat sound
which has a relaxing effect on a listener. The housing is assembled from
two molded plastic conformal sides having integral complementary
stanchions that mate to hold the sides together along a median plane. The
circuitry is mounted on a board which also supports an on-off switch
having a flat arm that pivots in the median plane. A portion of the switch
arm projects unobtrusively from the housing through a slot at the
interface between the sides to facilitate external control of the device.
Other References
Lancaster; D., TTL Cookbook, Chapter 4, H. W. Sams Co., Indianapolis, 1976,
pp. 171-175.
Neilson; G., Dupont Magazine, May-Jun. 1977, v. 71, No. 3, pp. 5-7.
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