US1596703A - Resonator attaching device - Google Patents

Description

Aug. 17 1926. 1,596,703

S. A. WILTSIE RESONATOR ATTACHING DEVICE Filed May 16, 1924 Patented Aug. 17, 1926.

UNITED STATES PATENT OFFICE.

SPENCER A. WILTSIE, OF ERIE, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO C. BRUNO & SON, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

RESONATOR ATTACHING DEVICE.

Application filed May 16, 1924. Serial No. 713,735.

This invention is designed to attach a resonator to an instrument, such as a banjo, so arranging it that it may be readily attached and detached to vary the tone of the instrument and may be readily fitted to different instruments and may be conveniently carried when not in use.

The invention is illustrated in the accompanying drawings as follows Fig. 1 shows a plan View of the resonator.

Fig. 2 an enlarged section of a side wall of a banjo, showing the attaching means thereon. Fig. 3 is a section on the line 33 in 15 Fig. 1. I

1 mark-s the banjo frame, 2 the head, 3 the bridge, 4 the strings, 5 the head shoulder. and 6 the clamping ring for the head oper-- ating on the shoulder 5, the same being secured by the usual clamps 6 in order to put the head under tension.

The resonator plate 7 is in the formof a disc having a central opening 8 which opens to the body of the banjo and is of a diameter 25 to engage the lower edge of the frame. It has a series of openings 9 extending through the plate outside the frame. A resonator shell 10 is secured to the plate, the plate preferably having a flange 7" which telecopes the edge of the shell 10 and the parts are secured together by indentures 7 Key-hole slots 11 having openings 12 and radially extending slots 13' are arranged in the plate 7. Clamping bolts 14 extend through the key-hole slots. They have the adjusting nuts 15 on their lower ends and these nuts have a lower shoulder 16 of a size to enter the opening 12 and to engage the sides of the slots 13, the neck 17 permitting of the movement in the slot 13. The upper end of the adjusting nut has a nurled head 18 by means of which the nut may be screwed to give the bolt the right length for the particular instrument.

A clamping hook 19 extends over the ring 6. It has a loop 20 at its lower end, the end of the loop being secured by a rivet 21. The

loop has perforations 22 through which the bolt 14 extends. A spring 23 is arranged within the loop and engages a collar 24 on the bolt 14.

In order to put the instrument in place all that is necessary is to place the clamps in position in the key-hole slots, place the resonator on the instrument and draw up the clamp so as to snap the hooks 19 over the ring. The loops 20 make convenient handles for engaging the clamps. The radial slots extend a suflicient distance to adapt the clamps for different sizes of instruments and the screw has a sufficient adjustment to adapt the clamps to different depths of instruments. The clamps are detachable or removable from the resonator so that when not in use the resonator may be readily packed and carried. The resonator is preferably made of aluminum but different materials mav be used.

What I claim as new is 1. The combination of a resonator; peripherally arranged clamps detachably securing the same to the frame of a musical instrument; and means for adjusting the clamps radially and axially relatively to the resonator.

2. The combination of a resonator having key-hole slots; and clamps having heads engaging the key-hole slots and detachably engaging the frame of a musical instrument.

3. The combination of a resonator; a clamp comprising a clamping hook; a loop; a bolt extending through the loop; a spring on the bolt within the loop; and means connecting the clamp with the resonator.

4. The combination of a resonator; a clamp comprising a clamping hook; a loop; a bolt extending through the loop; a spring on the bolt within the loop; and means detachabl and adjustably connecting the clamp with the resonator.

In testimony whereof I have hereunto set my hand.

SPENCER A. VVILTSIE.

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