US1077347A - Differential adjusting-rod for drums. - Google Patents

Description

A. M. HOSKINS.

DIFFERENTIAL ADJUSTING ROD FOR DRUMS.

APPLICATION FILED MAR.31, 1913.

I Patented Nov. 4, 1913.

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UNITED STATES PATENT OFFICE.

ADELMOUR M. HOSKINS, OF MINNEAPOLIS, MINNESOTA.

DIFFERENTIAL ADJUSTING-ROD FOR DRUMS.

To all whom z't may concern:

Be it known that I, ADELMQUR M. Hos KINS, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Differential Adjusting-Rods for Drums; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements 1n adjusting rods for drums and, to this end, it consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

' The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views. K

Referringto the drawings: Figure 1 is a side view of a drum having incorporated therein my invention; and Fig. 2 is a view principally in section, taken on the line 00 m of Fig. 1, on an enlarged scale.

The numeral 1 indicates the shell of a drum, the numeral 2 the batter head, and the numeral 3 the snare head. The batter head 2 is secured to the shell 1 by the customary flesh hoop 4 and cotiperating counter hoop 5, and the snare head 3 is secured to the shell 1 by the customary flesh hoop 6 and cooperating counter hoop 7.

The above described parts are those of a snare drum but, as far as my invention is concerned, they will apply to any drum having two heads.

Referring now to my invention, which relates to the drum head adjusting devices, it may be here stated that, as each drum requires a multiplicity of these devices and as these devices are identical one with the other, the descriptions of one will suffice for both.

An anchor lug 8 having an internally threaded passage 9 is secured to the periphery of the shell 1, intermediately of its two edges. The base of the lug 8 is considerably wider than its upper or screw threaded portion and is rigidly secured to the shell 1, by rivets, to resist pulling strains on either of the counter hoops 5 and 7. Attached to the counter hoop 5 is a hook 10, having an internally threaded sleeve 11, and attached Specification of Letters Patent.

Application filed March 31, 1913.

Patented Nov. 4, 1913. Serial No. 757,753.

to the counter hoop 7 is a hook 12, having a sleeve 13. The passages through the lug 8 and sleeves 11 and 13 are all axially alined. Loosely telescoped through the sleeve 13 is a relatively short tubular adjusting rod 14, having screw threaded engagement, at its inner end, with the lug 8. Rigidly secured to the outer end of the rod 14 is a thumb piece 15, which reacts against the outer portion of the hook 12 and its sleeve 13. Loosely telescoped through the tubular rod 14 is a relatively long adjusting rod 16, having screw threaded engagement, at one end, with the sleeve 11, and having, at its other end, a thumb piece 17, which reacts against the thumb piece 15. The threads on the long rod 16 must have greater pitch or travel than the threads on the short rod 14, preferably twice as great. This can be accomplished by providing the long rod 16 with double threads or with threads that are twice as coarse as those of the short rods 14. By placing the thumb pieces 15 and 17 close together, the same may be turned together or separately, to simultaneously or independently work the rods 14 and 16 in the adjustment of the heads 2 and 3. If the threads on the rods 14 and 16 are of the same pitch, when the two rods are rotated simultaneously the snare head 3 would be tightened but the batter head 2 would not. The reason for this is that, when the two rods 14 and 16 are rotated together, the latter partakes of the endwise movements of the former, and, hence, to cause these simultaneous movements of the two rods to simul taneously tighten both heads, the threads on the said rods 16 must move into the sleeve 11 of the hook 10 faster than the said rods 14 and 16 move endwise through the cotiperating lug 8.

The advantages of my improved device may be briefly stated as follows: The drum heads may be either simultaneously or independently adjust-ed; the batter head may be taken off without removing the snare head; the two heads will be kept parallel or true; the snare head may be placed under less tension than the batter head, which is a great advantage in playing; both heads may be tightened from the bottom of the drum, thereby allowing the batter head to be free from tightenin keys; a separate tightening key is not necessary; and a very thin snare head can be used in connection with a batter head of ordinary thickness. As is well known, a very thin snare head produces a much better tone than a thick one.

The above described device, in actual usage, has been found highly efficient for the purpose had in view.

What I claim is:

1. The combination with a drum, of drum head adjusting rods telescoped one within the other and having operating devices located at one head of said drum, for independently Or simultaneously adjusting said rods, at will, substantially as described.

2. The combination with a drum shell, drum heads, and hoops for securing said heads to said shell, of a plurality of drum head adjusting devices, each comprising an anchor lug secured to said shell, fastenings applied to said hoops, and adjusting rods tclescoped' one within the other, the outer of said rods having screw threaded engagement with said anchor lug and bearing against one of said fastenings, and the inner rod having screw threaded engagement with the other of said fastenings and bearing against said outer rod, said rods being adapted to be turned to adjust said fastenings, substantially as described.

3. The combination with a drum shell, drum heads, and hoops for securing said heads to said shell, of a plurality of drum head adjusting devices, each comprising an anchor lug secured to said shell, fastenings applied to said hoops, and adjusting rods telescoped one within the other, the outer of said rods having screw threaded engagement with said anchor lug and having a thumb piece bearing against one of: said tastenin 's, and the inner rod having screw threaded engagement with the other of said fastenings and having a thumb piece hearing against the thumb piece of said outer rod, said rods being adapted to be turned by said thumb pieces to adjust said fastenings, substantially as described.

t. The combination with a drum shell, drum heads, and hoops for securing said heads to said shell, of a plurality of drum head adjusting devices, each comprising an anchor lug secured to said shell, sleeve equipped hooks applied to said hoops, and adjusting rods telescoped one within the other and passed through the sleeve of one of said hooks, the outer of said rods having screw threaded engagement with said lug and having a thumb piece reacting against the sleeve through which it is passed, and the inner rod having screw threaded engagement with the other of said sleeves and having a thumb piece reacting against the thumb piece of said outer rod, said rods being adapted to be turned by said thumb pieces to adjust said fastenings, substantially as described. i

In testimony whereof I aiiix my signature in presence of two witnesses.

ADELMOUR M. HOSKINS. lVitnesses HARRY D. KiLeonn, Bremen G. VHEELER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G.

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