Abstract: The present invention involves a stringed musical instrument having a lower portion comprised of a resonance body and an upper portion comprised of a neck and headstock. The resonance body encloses a resonating chamber and has a sound board and a bridge for fastening multiple strings. One or more sound holes are carried by the resonance body. The neck has an upper end from which the headstock extends and a lower end that is secured to the resonance body. Multiple pegs located in the headstock are connected to the strings for tightening and loosening the strings. One or more sound holes are located in the upper portion of the instrument. An elongated, hollow, enclosed passage is located in the upper portion of the instrument and communicates the resonating chamber with the one or more sound holes in the upper portion.

Abstract: A pattern reproduction table incorporates a support grid which supports a transparent perforated sheet above a plurality of lamps. The support grid comprises a plurality of thin polished longitudinal and transverse members which are interlocked and which are mounted in tension on an enclosure. The support grid provides rigid support for the transparent perforated sheet without obscuring the lamps or interfering with a vacuum blower which is mounted in the enclosure.

Abstract: A multiple pattern grading machine includes an open, horizontally-disposed support frame within which a table is movably mounted by means of parallelogram linkages connecting the opposite ends of the table to the adjacent ends of the support frame. The parallelogram linkages also mount a plurality of channel bars arranged in corresponding pairs at opposite ends of the table, each corresponding pair of channel bars being adapted to mount a sheet of pattern reproducing paper therebetween, with the paper sheets arranged in a superimposed stack across the table. A selected pair of channel bars mounts a rigid grid for mounting master pattern sections located above the uppermost sheet in such a manner that each of the pattern reproducing sheets and the master pattern sections are moved relative to one another in varying increments of distance when the table is manually moved in the frame.

Abstract: In a cutting board assembly having a clamp bar operated by a foot pedal mechanism for clamping papers or similar materials to the board for cutting, means are provided for accurately aligning guide markings on the paper with the cutting edge of the board. Such means include an aligning strip secured to the under surface of the clamp bar and projecting therefrom, with the straight edge of the projecting portion of the strip registering with the cutting edge of the board, whereby the markings on the paper can be visually aligned with the straight edge of the strip and therefore with the cutting edge of the board for accurate cutting. The aligning strip may be made of transparent material or of opaque material provided with apertures through which the markings can be seen. The foot pedal mechanism is also provided with adjustable stop means which limits upward travel of the clamp bar so that the aligning strip is maintained close to the paper to be cut for accurate alignment of the markings thereon.