US1539804A - Adjustable lamp stand - Google Patents

Description

May 2%, 1925. 1,539,804

F. W. ROBINSON ET AL ADJUSTABLE LAMP STAND Filed Sept. 15, 1923 2 Sheets-Sheet 1 5W1: 10mm MM 12 W INVENT RS ATTORNEY May 26, 1925. 1,539,804

F. w. ROBINSON ET AL ADJUSTABLE LAMP STAND Filed Sept. 15, 1923 2 Sheets-Sheet 2 INVENTORS ATTORNEY Patented May 26, 192 5.

UNITED STATES'PATENT OFFICE.

FREDERIC W. ROBINSON AND KENNETH V.

KNAPP, F NEWARK, NEW JERSEY, AS-

SIGNORS TO HANOVIA CHEMICAL AND MFG. 00., 0F NEWARK, NEW JERSEY, A COR- PORATION OF NEW JERSEY.

ADJUSTABLE LAMP STAND.

Application filed September 15, 1923. Serial No. 662,806

To all whom it may concern:

Be it known that we, Fnnnmuo W. ROBIN- SON and KENNETH V. KNArr, both citizens of the United States, and residents of Newark, in the county of Essex and State of New Jersey. have invented certain new and useful Improvements in Adjustable Lamp Stands, of which the following is a specification.

This invention relates to improvements in to types adapted to stands and particularly adjustably support electric lamps, as used for scientific and medical purposes v One of the objects of the invention is to provide a stand com post carrying a rotatable and vertically adjustable sleeve provided with clamping means and having an angularly adjustable bracket in which operates a transverse slide carrying the lamp head support.

Another purpose is to produce a device for positively actuating the slide into desired adjustment and locking the same when such adjustment has been attained, means also being provided forrigidly clamping the bracket in any angular adjustment relative to the post.

A further aim is in the provision of an inclinable lamp support .having efficient clamping means to retain its angular adjustment and provided with a cradle or socket having inreaching, spring actuated clamps for automatically engaging the lamp used in connection therewith.

Supplementary to the foregoing objects are the provision of means-for counterbalancing the weight of the lamp. said means being either engageable to the lamp direct or the bracket at the sleeve as preferred, and associated with the counterweight are means to prevent entanglement of the flexible connecting element used,- irrespective of the position of parts.

Still further objects are to provide an apparatus that can be used either for rightor left hand operations, in which adjustments can be made by the use of one hand only, and further, to produce a device that can be cheaply and economically manufactured.

These and other objects, unspecified but posed of an upright apparent further on, are accomplished as hereafter described and shown in the accompanying drawings, forming a material part I of this disclosure, and in which Figure 1 is a front elevational view, showing an embodimentof the invention as completely assembled for operating.

Figure 2 is a side view of the same showing the parts in mid position.

Figure 3 is a fragmentary perspective view of the sleeve carried, arm support bracket and adjustable clamp devices used therewith, drawn to an enlarged scale.

Figure 4 is a longitudinal sectional view taken through the center of thesame, in the plane of the bracket clamp axis.

Figure 5 is a similar sectional view of the sleeve taken in a plane at a right angle to Figure 4. I

Figure 6 is a fragmentary longitudinal sectional view taken through the upper part of the tubular post. I

Figure 7 is a sectional view of the lamp head support, showing its automatic and manually adjustable clamp features.

Figure 8 is aside elevational view of the same, showing the support bar connection.

As shownin the drawings the apparatus is composed of a base, its hub having legs 16, preferably three in number, equally spaced and provided at their extremities with casters 17 facilitating its movement over level surfaces.

Rigidly fixed upright in the hub 15 is a tubular post 18 extending to any desired height and surmounted at its top'by a throttled cap 19, its upper, outer surface 20 presenting a parabolic curve blending into the central conical cavity 21, enlarged as at 22 and in open communication with the interior of the" post.

A cord or like flexible element '23 passes freely through the opening in the cap, its inner end being secured to a counterweight 24 movable within the post and its outer end having a clip 25 engageable with parts to be wholly or partially supported as hereafter describe It is to be noted that the bi ht of the cord in assing over the arabo icall curved sur ace 20 is supported with very 'ttle friclar tion and it is found by experience that the cord cannot become entangled, fouled or in any way rendered unable to perform its function under the most severe tests when such device is used.

Engaged on the post 18 is a freely fitting sleeve 26 having an annular chamber 27 in 'which 0 crate a pair of opposed fiat springs left hand as preferred or more convement,

"due to the interposition of the springs the post is not marred or disfigured, even'if the screw be forced tightly inward, the function of the springs being mainly that of a gib or cushionm element.

Extending laterally outward from the collar 26, at a point near its lower end and at a right angle to the bosses 31, is a larger diametered boss 32 having a fiat level surface 33 from which projects an integral stud 34, its end 35 being squared to receive a washer-like plate 36 having a similarly shaped opening.

The stud is drilled and tapped to receive a knurled head clamp screw 37 adapted to press the plate 36 forcibly towards the surace 33, the plate'impinging against a lug 38, forming part of a bracket 39, and bored to fit the stud 34 on which it is revolubly mounted.

Intermediate the inner face of the lug 38 and outer face 33 of the sleeve boss, is inter-' posed a series of friction plates arranged in rouped alternating order, one group 40 bemg constrained to the boss 32 by a pin 41,

and the other group 42 being held by a simiin 43 to the lug 38. us when the screw 37 is slackened, the

i bracket 39 may be rotated on the stud 34 nearly a full turn, or until the pins 41 and being understood that both pins pass freely through peripheral projec tions on the plates 40 and 42 as shown; on

the contrary when the clamp screw is set up,

the several alternatingly arranged frictlon lates are pressed into forcible contact, holdmg the bracket 39 rigidly to the sleeve.

The bracket 39 extends in opposite directions past the base of the boss 32 and contains a longitudinal recess suited to guide and support a rectangular tube 44, which, together with a toothed rack 45, rigidly secured to the tube, is freely slidable therein.

Meshingwith the teeth of the rack 45 is a i spur pinion 46 mounted between lugs 47 and 48 extending from the bracket 39, opposite 30, interchangeable in either 52 the boss 32, the pinion being slidingly engaged on a polygonal spindle 49 rotatable in the lugs and having a stem 50 extending through the lug 48, this stem being fixed in a knob 51, below and in register with the head of the screw 37.

A round boss on the face'of the lug-48 contains a concentric rowof holes 52 and fixed in the inner face of the knob 51 is a single pin 53 engageable in any of the holes To operate the rack the knob 51 is drawn outwardly to clear the pin '53, the spindle sliding through the pinion and lug 47 until its limit of movement has been reachedat the bottom of the recess 48 in the lug 48, whereupon rotating the knob 51, the 'plnion will be turned, transmitting longitudinal motion to the tube and rack, which, as will later be seen, constitute a support bar.

When this bar has been moved in the bracketto secure the desired adjustment, the knob is pressed inwardly and the pin 53 engagcd in the closest adjacent hole, locking the bar from further longitudinal movement.

It is obvious that the cross section of the spindle 49 may be as shown or otherwise, its function being to transmit rotary motion to thepinion and permit necessary longit'udi nal movement in looking or unlocking the knob 51-without disengaging the pinion.

In order to prevent excessive movement of the elements 44 and 45, a stop plug 54 is inserted and fastened in one end of the tube 44, this plug making contact with the end of the bracket, but obviously another form of limit stop may be substituted.

At the opposite or front end of the bar is rigidly fastened an arm 55 acting as a stop and extending in alinement with the tube and terminating in forks 56, thru which passes a rod 57 having a threaded end engaging a nut 58, held from rotation by a pin: 59; the other end of the rod is integral'with or rigid in a knurled clamp head 60, by rotation of which the forks may be forced towards each other. v

Entering, between the forks is a' tenon 61, rotatable on the rod 57 and having a D111- rality of transversely drilled holes in which areentered rods 62 of any preferred fric-. tional material, as fiber, extendingslightly outward soas to make direct contact with theinner faces of the forks and by which the tenon may be clamped. a

This tenon extends from a clutch head 63, the central flat portion 64 of which is in register with the tenon and gradually increased in width, its upper edge having a fiat bead 65,v

The lower part of thehead contains opposed lateral recesses 66 curved and suited upper members 69 extending above the flat bead 65, forming a socket adapted to engage a lamp body, holding the same securely but re-movably on the stud. each independently These clamps are pressed toward the head element 64 by coiled compression sprlngs 70 fitting 1n recesses 71 in the outer sides of the elements 68,. the outer ends of the springs abutting respectively the head 72 and nut 73 of a bolt 74. passing through the head element 64:-

one or both of the clamps moving on their rockers 67. v i

The purpose of this clamp socket is to hold the lamp head firmly and provide means whereby the same can be tilted at any preferred inclination by the knob 60.

Such lamps are usually cooled by water circulation and for this purpose have attached to them flexible pipes 76 and 77, re-

spectiyely inlet and outlet, connecting with a supply source and discharge.

A cable 78 for supplying current to the lamp is arranged substantially parallel to the tubes and over them, these three elements normally extending rearwa-rdly over the curved upper surface of the lug 38 and are prevented from falling ofl" by guard 79 formed at the upper portion of the plate 36, .said plate being reduced in width and provided with an outturned extension 80.

The clip 25. carried at the free end of the eounterbalancing cord. is engageable with the extension 80, or it may be engaged with the handle element 102 of the lamp head as shown in Figures 1 and 2.

From the foregoing it will be clear that the lamp head 100 may be easily engaged in the socket in a firm and secure manner or removed therefrom at will, and when. disengaged its weight is taken by the counterbalancing device direct.

It is further apparent that the lamp head socket can be inclined on the axis 57 and firmly clamped when the desired adjustment is obtained.

In addition the lamp head may be extended or retracted by manipulating the knob 51 and also looked thereby in a positive manner.

The lamp support bar 44 may beheld at any desired angle or turned nearly vertical and rigidly clamped in such adjustment, while the sleeve 26 can be rotated on the post, raised or lowered and also rigidly clamped in any desired position, these several devices rendering the lamp universally adjustable and applicable in practice in directing the rays as may be desired.

Although we have described our improvements with considerable detail and with respect to certain particular forms of our invention, we do not desire to be limited to I such details since many changes and modifications may well be made without departing from the spirit and scope of our invention in its broadestaspect.

Having thus described our invention, what we claim as new desire to secure by Letters Patent, is I 1. A therapeutical lamp stand comprising a castored base, an upright fixed therein, a sleeve slidable onsaid upright, said sleeve having an annular chamber. spring grip strips fixed in opposite sides of the chamber, means for pressing either of said strips into forcible clamping engagement with said upright, lamp supporting means adjustably carried on said, sleeve, an electriccable connecting with said lamp, and resilient means guiding said cablej 2.IA- therapeutical lamp stand comprising a c-as'tored, base, an upright fixed therein, asleeve slidable'on said upright, means for clamping said sleeve to said upright at any point along the entire'length thereof, a bracket pivoted on.jone side v0t said sleeve to extend outwardly therefrom, means for clamping said bracket in angular adjustment relative to the axis of saidsleeve. a rigid tubular lamp supporting arm of rectangular cross section movable lengthwise in said carried on said sleeve for supporting and bracket. means to adjust said arm lengthwise in the bracket, and means for positively locking said arm. said'locking means being combined with the adjusting means.

A therapeutical lamp stand comprising i a; castored-base, a straight tubular upright fixed therein, a sleeve slidable on said upright from end to end thereof, means for .ad-

justablysecuring said sleeve on said upright, said sleeve having a laterally extendingstud, a brac-ket pivotallv mounted on said stud, a plurality of friction washer plates on said stud interposed between said sleeve and bracket, said plates being secured in alternate relation respectively to the sleeve and bracket, hand operated means for clamping said plates to prevent relative rotation of the alternate plates and'to hold saidbracket' in adjustment, and a hollow rectangular lamp carrying arm movably supported in said bracket.

4. A therapeutical lamp stand comprising a movable base, a hollow upright fixed therein, a sleeve adjustable lengthwise on said upright, an arm-adjustable lengthwise in said sleeve, a lampatione end of said arm, a weight freely movable in said upright, a flexible cord connecting said weight with means for clamping said gib against said upright to prevent motion ofthe sleeve, a

' bracket adjustably rotatable on the side of bar in said bracket, means for actuating said bar, means for positively locking said bar, stops on the ends ofisaid bar, and a clamp head carried at one end of said bar. Y 7

6. A therapeutical lamp stand comprising a movable base, a hollow upright fixed there said sleeve, a rack in, a sleeve slidable and rotatable on the upright, a flexible gib in said sleeve, means for clamping said gib against said upright to prevent,motion of the sleeve, a bracket adjustably rotatable on the side of said sleeve, a rack bar in saidvbracket, means for actuating said bar, means for positively locking said bar, a stop at one end ofsaid bar, a fork at the other end, and'a lamp carrying socket pivoted in said fork.

7. A therapeutical lamp stand comprising a base, a'post fixed therein, .a bracket adjustable on said post, said bracketbeing inclinable, a rack bar in said bracket, a pinion engaging said bar, a knob for rotating said pinion, means controlled by said knob for locking the pinion, a lamp head carried at one end of said'bar, and means for inclin ing said head relative to said bar.

8. A therapeut-ical lamp stand comprising a base, a post fixed therein, a bracket adjustable on said 0st, a bar slidable in said bracket, means or actuating said bar, a fork atone end of the bar, a lamp head socket, a tenon on said socket pivoted in said fork, frictional elements in said tenon, and means for clamping the fork on said friction elements to prevent movement of said socket.

9. A therapeutical lamp stand comprising a base, a post fixed vertically therein, a

sleeve adjustable on said post,a bracket pivoted on said sleeve at the side thereo a bar slidable in the bracket, means for actuating and controlling the movement of said bar, a lamp head socket inclinably engaged on one end of said bar, opposed spring ac tuated means associated with said socket adapted to automatically engage and clamp the lamp head, said means maintaining the head in an upright position.

10. The combination with a lamp having a body element of substantial ovoidal cross section, of a snap socket receptive of said lamp element, said socket having a fixed central web beaded on its upper surface to act as a seat for said lamp element, a pair of opposed clamps rockingly engaged on said web at their lower ends, their upper ends being suited to receive said body element above the bead, and a spring in each clamp urging its upper end inwardly.

11. A lamp stand comprising a base, a hollow standard, a lamp head, means slidable and rotatable on said standard to adjustably support the lamp head,fa counterweight for said lamp, said counter-weight bein freely contained in said standard, a flexible connection between said lamp head and said counter-weight, and a hollow cap fixed on said standard through which said connection passes, said cap having a parabolically curved surface against which the connection makes contact.

12. A lamp stand having a standard, an

arm adjustably connected thereon, a lamp.

head having rear extensions, one of said extensions acting as a handle by which the head can be maneuvered, the other extension being of elliptical cross section, its longer axis being in ahorizontal plane, and a pair of opposed clamps on one end of said arm, said clamps being automatically engageable with the second named extension upon the application of moderate pressure. This specification signed and witnessed this 6th day of September, 1923.

W. ROBINSON.

FREDERIC KENNETH V. KNAPP. Witnesses:

GEORGE H. LAMBERT, FERDINAND Now.

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