US1769004A - Adjustable lamp - Google Patents

Description

July 1, 1930,

- w. TURSEQ 7 1,769,004

' ADJUSTABLE LAMP Filed Dec; 22, 1927 2 Sheets-Sheet l WITNE'66E6: IN-VENTOR William Turse ATTdRNEY Y Fil ed Dec. 22, 1927 2 Sheets-Sheet 2 FIG- E I WITNE5SE5:

A TTORNE Y Patented July 1, 1930 PATENT OFFICE WILLIAM Tunsn, or PHILADELPHIA, PENNSYLV NIA- ADJUSTABLE LAMP ,Applicationfiled December 22, 1927. Serial No. 241,753.

escopes, in such a manner that no looseness or side play w11l be present and W111 remam 1n anypbsition to which the extensible member is adjusted without any manually oper ated accessory or attachment.

' Still another object is to so design the sev- 2Q eral parts comprising the lamp that it maybe constructed of highly polished or lacquered tubing without disfiguring the finish of the tubing or subjecting same. to disfigurement,

due to the ex'tendingand retracting of the extensible member.

The above objects are accomplishedby the provision of a support for lamp sockets and the like having one member telescopically received in another and resilient yieldmg means on the first of said members frictlonally contacting the walls of the second named member.

member snugly fitting the first named memj ber and assisting the contact member in supporting the first named member 1n positions of adjustment and against lateral departure fromcoaxial alignment of the telescopic member. A further accessory may be pro- Vided to prevent the turning of one member relative to the other in the nature of a longitudinally extending feather and a notch or" groove with which the same cooperates.

The following figures of the drawings show several forms of the device illustrative of the principles of the invention.

In the drawings: Figure 1 is a side View of the lamp embodying my invention, certain parts being broken away,

Associated with this construction may be provided a sleeve on the second named shown) lamp sockets'17 being connected to Figure 2 a view, partly in section, of a frag ment of the lamp shown in Figure 1 drawn to a larger scale in order to illustrate certain details of construction, and I -Figure 3 a sectional plan view, taken on line 3-3 on Figure 2. s

Figure 4 is an enlarged perspective view of a piston having a different form of spring support, and

Figure 5 an enlarged perspective View of the protecting bushing shown in Figure 1.

Figure G is a central vertical sectional View showing a piston similar to the piston shown in Figure 1 but having a different type of springsupport,

Figure 7 a sectional plan View thereof, as indicated by line 777 on Figure 6, and y Figure 8 a side view of a piston showing stillanother form of spring support.

Referring now in detail to the drawings, my invention has been shown embodied in a floor lamp whose standard comprises abase 10, of sufiicient weight and diameter to insure the stability of the lamp, and a tubular uprightll secured to base 10 in any suitable manner and, if desired, provided with orna- 4 ments 12 and13.

A tubular extension 14 telescopes with up right 11 and has fixed on its lower end a piston 15 which is slightly smaller in diameter than the interior of upright 11. A fixture 16, having one or more electric lamp sockets 17, is secured on the upper end of extension 14 and is adapted to support a shade (not a source of electric energy by means of extensible flexible conductors (not shown) extending through the interiors of extension 14 and upright 11.

Extension 14 may be of any diameter smaller thanthe interior of upright 11 but is preferably considerably smaller in order to give the lampan artistic appearanccand, consequently, it is necessary'to retain extension 14 centrally of upright 11. This is accom- 95 plished by piston 15 and by reducing sleeve 18, preferably in the formof an ornament,

which fits snugly over the top of upright 11,

as shown in Figures 1 and 2.

.As the friction created by ,moving'exten opposite'points and is preferably provided sion 14 through sleeve 18 would tend to mar the surface of the extension, a protective bushing 19 of fibre or similar material is snugly fitted into the upper part of sleeve 18 and its inside diameter is such that ex tension 14 has a sliding fit therein. Bushing 19 is held against movement longitudinally of sleeve 18 by means of an integral flange 20, of nearly the same diameter as upright 11, clamped between the end of the upright and a shoulder 21 formed in sleeve 18.

Extension 14 is held in adjusted positions by a spring support carried by piston 15 and engaging the inner walls of upright 11. This spring support may take a number of forms and several of such forms have been illustrated. In Figures 1, 2 and 3, piston 15 is shown provided with an annular groove 22 for accommodating a spring ring 23 which is sinuously bent to form indentations 24, which hold the ring in groove 22, and projections 25,

which engage the inner walls of upright 11 and frictionally support the piston and ex tension 14,

The piston 28, shown in Figure 4, is the same as that shown in Figure 3 with the exception that groove 22 is omitted and a spring support 29 is provided having its endsi secured to the underside of piston 28 adjacent the periphery thereof at diametrically with one or more turns or loops 30 near its center so that sufficient reslliency 15 provided to force its sides 31 to the support against the inner walls of upright 11 for frictionally supporting piston 28.

The piston 33, shown in Figures 6 and 7, is identical with piston 15 with the exception that the groove 34 is somewhat larger than groove22 and is preferably semicircular in cross-section in piston 15 so as to accommoits ends secured together to form an annular date a spirally wound spring 35 which has coil whoseouter surface is adapted to engage the inner Walls of upright 11 for frictionally' supporting piston33 in selected positions.

The piston 37 shown in Figure 8 is iden-' tical with piston 28 and has two or more spring fingers 38 secured 011 its under face which are adapted to engage the inner walls of upright 11 for frictionally supporting piston 37in selected positions. Spring fingers 38 may each consist of a bent strip of spring metal or they may be bent tongues extend ing :from an a-pertured disk secured to the underside of piston 37 the disk being aper tured to accommodate the flexible electrical conductors.

In extending and retracting extension 14, it

is possible that it may be rotated and cause the electrical conductors to become twisted and tangled inside of upright 11, making it upright 11 with a vertically disposed guide 40 which is straddled by a notch 41 formed in piston 15. Upright 11 may be easily provided with a guide 40 by securing the ends of a straight piece of stiff wire to its wall. Pistons 28, 38 and 37 are also provided with notches for accommodating guide 40 and, as they are similar to notch 41 and perform the same function, they have been given the same reference number. a

The device as hereinbefore illustrated in several modifications is illustrative of the principles of the invention and it is to be understood that the device may be further modified and changed within the scope of the invention as herein set forth and within the scope of the appended claims.

I claim 1.' A lamp including a'tubular standard, a reducing sleeve secured to the top of the standard, a tubular extension slidable in the sleeveancl standard, a piston on the extension having a notch, a guide secured in the standard and extending through the notch, and spring means on the piston engaging the walls of the standard for supporting the extension.

2. A lamp including a tubular standard, a reducing sleeve secured on the top' of the standard, a protective bushing in the sleeve, a

spring carried by the piston engaging the walls of the standard.

In testimony whereof I have signed my name to this specification.

WILLIAM TURSE.

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