USD232639S - Teaching aid for demonstrating driven harmonic motion - Google Patents
Teaching aid for demonstrating driven harmonic motion Download PDFInfo
- Publication number
- USD232639S USD232639S US D232639 S USD232639 S US D232639S
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- US
- United States
- Prior art keywords
- demonstrating
- teaching aid
- harmonic motion
- driven harmonic
- driven
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United States Patent ()fiice atented Sept. 3, 1974 TEACHING AID FOR DEMON RATING DRIVEN HARMONIC M 0N FIG. 1 is a front elevational view of a teaching aid for demonstrating driven harmonic motion showing my new design;
FIG. 2 is a side elevational view of the invention taken from the left side of FIG. 1;
FIG. 3 is a top plan elevational view of the invention;
FIG. 4 is a side elevational view taken from the right hand side of device shown in FIG. 1; and
FIG. 5 is a rear elevational iew of the invention shown in FIG. 1.
I claim:
The ornamental design for a teaching aid for demonstrating driven harmonic motion, as shown and described.
PAGE 2 References Cited UNITED STATES PATENTS 5/1973 Stephenson D251 R OTHER REFERENCES Cenco Cat. 1-300, recd Oct. 20, 1961, p. 650, upper left, harmonic motion spring.
MELVIN B. FEIFER, Primary Examiner
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