US2172085A - Music stand - Google Patents

Description

sept. 5,. 1939.

O. L. LAGERVALL MUSIC STAND Filed Mroh 29, 193s 2 sheets-sheet 1 Huma/who@ 07rd .LAGE/W/Ju mf m Sept. 5, 1939. o. l.. LAGERVALL 2,172,085

MUSIC-STANDA Filed MaICh 29, 1,938 2 ShetS-Sheet 2 Patented Sept. 5, 1939 UNITED .STATES PATENT lortica 1 Claim.

This invention relates to music stands and the like, and has for one of its objects the production of a simple and eicient adjustable standard wherein the weight of the movable portion of the standard and the structure carried thereby are counter-balanced by a spring of suflicient' strength to support the load placed thereon, and wherein automatic friction gripping means is provided to maintain the standard in a. desired po-` sition, and at the same time permit the movable portion of the standard to be moved upward or downward to a selected position by the application of a minimum amount of pressure in a desired direction.

A further object of this invention is the production of a simple and efficient friction gripping means for frictionally holding the sections of an adjustable standard in, a selected set position.

Another object of this invention is the production of a simple and eflicient hinge connection for attaching a desk to the standard of a music stand or similar appliance.

In the drawings:

Figure 1 is a side elevational view of the music stand certain parts being shown in section;

Figure 2 is an enlarged fragmentary vertical sectional view through a portion of the standard;

Figure 3 is an enlarged vertical sectional view through a portion of the standard illustrating p-articularly the friction grip means;

Figure 4 is a transverse sectional view taken on line 4 4 of Figure 3;

Figure 5 is a transverse sectional view taken on line 5 5 of Figure 3;

Figure 6 is a rear elevational view of the upper end of the standard and illustrating the desk portion carried thereby;

Figure 7 is a vertical sectional view taken on line l-l of Figure 6;

Figure 8 is a vertical sectional view taken on line 8-8 of Figure 7;

Figure 9 is a horizontal sectional view-taken on line 9-9 of Figure '7;

Figure l0 is a perspective view of the journal for connecting the desk with the standard, the various portions of the journal being shown drawn apart or separated.

By referring to the drawings, it will be seen that I5 designates a conventional base which may be of any suitable or desirable type having a centrally located aperture I6. A standard I1 is supported upon the base I5 and comprises a stationary hollow tube I8 having a tapering end I9, the aperture I6 also being tapered to receive the tapering end I 9. The tapering end I9 is provided with an inturned annular flange 20 at its lower extremity. This fiange A,2U surrounds an aperture 2| formed in the lower end of the tube I8, through which aperture 2l extends the shank 60 portion 22 of an anchoring plug, which anchoring base I5. A washer 24 ts around the shank portion 22 and is clamped firmly against the under Yface of the base I5 by means of a nut 25 which is threaded upon the lower end of the shank portion 22. By tightening the nut 25 upon the shank portion 22 it will be seen by considering y Figure 2 that the Ahead portion 23 of the plug which provides a wedge grip for the tube I8 will be drawn tightly Awithin the tapering end I9 cf the tube I8 and firmly lock the tube IB in engagen ment with the base I5.

The standard Il also comprises an inner adjustable tube 26 which is slidably mounted through the tube I8, as shown in Figure 2, the tube I8 having an inwardly extending annular flange 21 at its upper end fitting snugly around the adjustable tube 26. The adjustable tube 26 is hollow and carries a counter-balancing coil spring 28 one end of which rests against a transu versely extending stop pin 29 carried by the adjustable tube 26. This coil spring 28 also fits over an upright rod 3U, which rod 39 extends upwardly through the tube 26 and is provided with an annular base 3l fitting snugly within the tube I8, and this annular base 3l rests upon the head portion 23. The lower end of the coil spring 2B rests upon the annular base 3I, as shown in Figure 2, and it should be understood that the spring 28 is of such a size to work freely within the adjustable tube 26 without binding against the side walls thereof as lthe spring is compressed or expanded. "The upright rod 3G preferably Vterminates near the upper end of the stationary tube I8, as shown in Figure 2.

A friction gripping device is carried near the lower end of the adjustable tube 26 as shown in detail in Figure 3, and this friction gripping device comprises a plurality of spring metal strips 3-2, the ends of which are ared outwardly with respect to the hollow tube 26 and in opposite directions to provide spring friction grip members 33. These spring strips 32 are preferably arranged around the exterior of the lower end of the tube 26 yin spaced relation and are securely held upon the lower end of the tube 26 by means of an anchoring band 34. These strips 32 may be welded or otherwise fastened in position and provide oppositely arranged radially spreading elongated friction grip Yfingers for contacting with the inner face of the stationary tube I8 of the standard I1 .in a manner as shown'in Figure 3, the strips 32 preferably being of material length to provide .a span of material distance between the frictional contact ends ofthe fingers 33 of each strip 32. Because of the manner in which these ngers 33 contact with the inner face of the tube above and below the band 34 providing points of.

contact with the inner face of the tube I8 at various points around the innerl circumference of` the tube IB thereby providing lone series, of gripping fingers above a lower series tending to stabilize the adjustable tube 26 in its movement within the stationary tube I8. It should be understood that the counter-balancing spring 26 is of a suflicient strength to support the normal weight of the adjustable tube 26, and the parts of the appliance carried thereby, and the spring fingers 33 are of sufficient strength to normally grip the inner face of the tube I8 with suiicient friction grip to hold the adjustable tube 26 in a set position against the expansible urge ofthe spring 28, but at the same time allow the tube 26 to be moved upwardly or downwardly within the tube I6 by a very slight or minimum pressure either in an upward or a downward selected direction by the operator.

From the foregoing description it will be seen that a very simple and efficient friction brake arrangement is provided comprising a minimum number of parts which may be readily assembled and easily adjusted if desired, by bending the ends 33 outwardly or away from each other in the event of wear. In this way the fingers 33 by being bent outwardly will provide a tighter friction grip against the inner face of the tube I8. Ordinarily, however, these strips 32 are so formed of spring metal as to cause the spring fingers 33 to provide proper and efiicient friction gripping action.

By considering Figure 2 it will also be seen that the upright rod 36 will provide an efficient support and guide for the spring 28 and prevent the spring from buckling within the tube I8, the spring 28 being of suicient size to iit properly within the tube 26 and to freely move therein without binding action.

A shelf 4or desk 35 is adapted to rbe carried by the upper end of the adjustable tube'2t` andlis provided with a pair of wing plates 36 which are spot welded or otherwise secured to the under face of the desk 35 and are arranged in spaced relation to each other as is illustrated in Figure 6 of the drawings. A journal member 3l is mounted between the spaced wing plates 36, as shown in Figure 6, and this journal member 31 comprises a pair of cup-like sections 38 having flanges 39 along their inner faces, the flanges of the respective cup-like sections 38 being adapted to abut as shown in Figure 6. Each section 38 is provided with a concave shank portion di! having side flanges M, the side flanges 4I of the respective sections abutting. These shank portions 46 are fitted snugly about or around the upper end of the adjustable tube 26 and are securedY thereto by means of the stop pin 29 previously described, which stop pin extends through the tube 26 and shank portions 46 and is held in position by means of a suitable nut of a conventional type. This stop pin 29 performs a dual function, that is to say, the pin secures the two sections 38 of the journal 31 firmly together and in engagement with the tube 26, and also acts as an abutment or fjusting nut 45 is threaded upon the bolt 43 and the tension of the gripping parts may be regu- :lated by adjusting the nut 45 upon the bolt 43,

in thisrway increasing or decreasing the tension of the concave-convex spring washers 42, thereby providing aneiicient pivot support for the desk 35 in a manner whereby the desk 35 may be angularly adjusted and will be frictionally held in such an adjusted position, or may be moved from the full line position to the dotted line position shown in Figure 7.

From the foregoing description, it will be seen that a very simple and efficient journal has been provided for connecting the desk 35 to the adjustable tube 26 and that the journal may be itself adjusted to increase or decrease the' frictional grip of the washers 42 with respect to the' plates 36, providing in this manner an efficient friction grip journal to frictionally hold the desk in an angular adjusted position and at the same time allow the desk to be easily moved by exerting a slight pressure upon the desk in a desired direction.

It should be understood that it is not desired vto restrict the present invention to the construction of a music stand only, for the reason that the structural features are adaptable for use in connection with other adjustable standards for other types of appliances and that the desk Vmay also be applied to other Vtypes of appliances without departing from the spirit of the invention.

Having described the invention, what is claimed as new 1s:

An adjustable support comprising a base formed with a tapered opening gradually reduced in diameter towards its lower end, a standard having a tubular llower section and a tubular upper section sldably received inthe lower section through the upper end thereof, said lower section having an inturned flange at its upper end snugly engaging the wall of the upper section and providing a seal therearound, said lower section having its lower end portion tapered downwardly and terminating in an inwardly extending annular flange, the tapered lower portion. of tho lower section being snugly received inthe tapered opening of said base, a tapered plug snugly received in the tapered lower portion of the lower section and resting upon the inwardly extending flange at the lower end of said lowersection, a stem extending downwardly from said plug through the opening in the base, a fastener engaging said stem for drawing the stem and plug downwardly into tight wedging fit and rmly mounting the lower section to the base, a spring for urging the upper section upwardly and resting upon said tapering plug for holding said tapering plug in a rm position said flange at the lower end of the lower section and-sealing the lower end of said lower section, said iianges providing a sealed-in structure whereby grease may be retained within the lower section without danger of ejection therefrom as the upper section is sli-dably moved within the lower section, and means for holding the upper section in a vertically adjusted position. Y Y

OTTO L. LAGERVALL.

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