Music box with selectively programmable drum
OwnerCarlos W. Veachinventor
Life of this patent
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Abstract
Music box of the rotatable drum type with removable reed actuating pins which may be selectively disposed for playing various compositions, characterized by a drum having a peripheral surface without apertures therein and an envelope or sleeve surrounding same containing the apertures for retaining the pins, the envelope being injection moulded of plastic material, the apertures being non-circular, such as square, and the pins being cylindrical and of uniform diameter at all sections thereof.
Claims9
In a music box of the type including a rotatable cylindrical drum with music note actuating pins projecting from the peripheral surface thereof, the pins being selectively attachable to the drum in a desired pattern whereby different musical compositions may be played, the improvements, in combination, comprising;
- (a) an annular pin supporting member of substantially uniform thickness disposed on the peripheral surface of the drum,
- (b) said member being formed of material having a relatively low modulus of elasticity compared to metal,
- (c) said member having a plurality of spaced transverse rows of identical apertures extending therethrough,
- (d) each aperture being defined by at least three flat intersecting surfaces forming a cylindrical space of uniform polygonal cross section, and
- (e) a plurality of identical circular cylindrical pins of uniform diameter and length,
- (f) each pin being of a diameter such that it may removably engage intersecting surfaces of an aperture only at their central portions and with an interference fit therewith,
- (g) the outer surface of the drum forming a stop for the inner end of each pin.
A music box cylinder, comprising:
- (a) a drum having an imperforate peripheral surface,
- (b) an annular pin supporting member of substantially uniform thickness disposed on the peripheral surface of the drum,
- (c) said member being formed of material having a relatively low modulus of elasticity compared to metal,
- (d) said member having a plurality of spaced transverse rows of identical apertures extending therethrough,
- (e) each aperture being defined by at least three flat intersecting surfaces forming a cylindrical space of uniform polygonal cross section,
- (f) a plurality of identical circular cylindrical pins of uniform diameter and length, each pin being of a diameter such that it may removably engage intersecting surfaces of said each aperture at only their central portions and with an interference fit therewith, the outer surface of the drum forming a stop for the inner end of each pin.
Dependencies are inferred from the claim text.