US971203A

US971203A - Fixture for adjustable electric drop-light.

Info

Publication number: US971203A
Application number: US50214509A
Authority: US
Inventors: Harry Wallace Lawrence
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-06-14
Filing date: 1909-06-14
Publication date: 1910-09-27
Anticipated expiration: 1927-09-27

Description

H. W. LA'WRENGR FIXTURE FOR ADJUSTABLE ELECTRIC DROP LIGHTS.

APPLICATION FILED JUNE 14, 190".

Patented Sept.27,1910.

2 SHEETS-SHEET 1.

H, Wc LAWRENCE.

FIXTURE FOR ADJUSTABLE ELECTRIC DROP LIGHTS.

APPLICATION' PLHD JUNEl4,1909.

Patente@ spi;

2 SHEETS-SHEET 2.

echecs.

nnrn sfrnfrns enfreint" orientenl HARRY WALLACE LAWRENQE, 0E DENVER, CQLORADO.

FIXTURE Fon ADJUSTABLE creciente DROP-LIGHT' I To all whom 'itimoy concern:4

Be it known that 1, HARRY WALLACE LAW- RENCE, a citizen oi the United States of America, residing\in the city `and county ot Denvcrend Stilte of Colorado, have 1nvented .1 new `land useful Fixture 'for Adn non-conducting blocl secured to the seid plete or housing, having terminals to which the lamp wires are attached, and which nrc in circuit with the feed wire terminals, sind e. roller over which the said lomp 'wires travel, zitter passing down and around e similar roller on' :recenter-balancing weight,

through which the iree ends oi the lnmp/` wire pass, the said wires being connected to en electric drop light, the arrangement of lmnp wires and rollers being such to permit :i Vertical adjnstnn-mt ci. the drop light.

The invention further consists in certain details of construction hereinnitter to be set forth, and illustrated in the accompanying drawings, in which:

Figure 1, is e side view of the fixture, the two port-s constituting the sume being connected. Fig. il, is n. bottom plnn 4view ot the sznne. Fig. 35, is n bottoni plnn view ot the ceiling plete., showing the feed .wire terminels und wires connected therewith. Fig. Ll, :t top plain view-olf the.roller-supporting block, showing the lump wire terminals and wires connected therewith. Fig. 5, is n sectional view on the line el. Fig. Fig. 6, is e sectional view on the line 6-6 of l? 2. Fig. 7 is n perspective View of the roller supporting block. And Fig. 8, is u side elevation, showing the manner of coi'meeting the drop light and weight with the supporting iixture. i

Referring te the accompanying drawings, the numeral 1, indicates the ceiling plate, Which is circular in torni and made of shit able non-conducting materiel, 'preferably porcelain. The plete is constructed with e de pending annular rim or lip 2. which .terms e circular recess or depression 3, in `the center of the plate. The plate is secured te `nneunted e grooved relier .21,

A v Specification of Letters Patent. IPgEitQmgd Sep@ 2'?, 1910, VApplication tiled June 14, 1909. Serial No. 502,145.

the ceiling by screws, which pass through holes 4, at thebottoms of counter-sunk recesses 5 in` the annular lip. At diametricnlly opposite points on the ince of thc lip, recesses (3 areformed, in which lie metal terminals 7, the depth o t.' the recesses being the seme the thickness of the terminals, so that they willv lie flush with the face of the lip. The terminals are secured to the ceiling plate by screws 8, which extend through holes in the plate and into threaded apertures in the termimds. The liends of those sere lie in counter-sunk recesses El, in the' beck of the plete, which recesses nre iilled with n snitnble cement which prevents necident Ythrough contact with the hond ot thev screw. rlfhe terminals nre bent to torni two horizontally disposed members, which nre connected by u. verticnl member, which lies ngninst the inner surince oi the annuler lip. One horizontnl member ot enclrtcrn'iinnl is secured to the tnce of the lip while the other horizontal member rests upon the bottom of the circuler depression 3, ond is provided with .1 threaded aperture, which receives it' binding screw 10, the screws pnssing into recesses 11 in the plate. Oppositely positioned grooves or recesses 12, are formed in the in ce oi the annuler lip,'in line with ench binding screw 10, :1nd these recesses receive the ends ot the circuit feed wires 13, which nre secured to the termimils, by the binding screws 10, ns shown in Fig. 3. Thegrooves or recesses 1Q, :n'e employed when the plete connected with outside `leed wires, but when the platcis connected with concealed iced wires, the seid concealed wires poss through holes 11, in the plete, and thence to the terminals. 'ilhrezided holes 15 are `termed adjacent to the outer ends of 'the feed wire terminals Y, and these holes receive screws 16, the purpose oit which will presently appear.

The roller supporting bloeit 17, which forms the lower heit oie the iiXture, is also made of suitable noirconducting material, preferably porcelain, and is. of the term shown in the drawings. 'Vlie upper :tec/e of the block is tint vis provided with e central semi-circuler c mber 1S, or suitable depth, the sides oi which are straight end f 'i sitioned grooves or recesses 19, which fornr bearings for :t pin 20, nnen which is loosely oit non-conl\y,'perzillcl, and are formed with oppositely p0` 'ductine material which' lies within thel :teo

iiof

vcured in place, and the feed Wires are chamber 1S, but i above the tace of the b formed through the 1S, in line with the groo 2l. Terminals E32, are secured in d" cally opposite recesses in the tace o block, by screvs 2%, which pass un throuon holes inthe bloclfT 1nd enter threaded ho in the said terminals. rEhe inner ends ot the terminals are provided with threaded holes which receive binding screws 2G, and the outer ends thereof are slotted, as shown, one ot the terminals having a slot 2'4", xvii h extends in trom one ot its side edges, While the other terminal has a slot 28, which eX- tends in from its end. ln securing the block to the ceiling plate,` the block is placed so that the terminal having` the slot 2S engages one ot' the screws 1G, ot the terminal .7, the screw being withdrawn tar enough to allor.' the said terminal 22 to pass between the terminal Y, and the head ot' the screw l"- the scren' passing through the slot 2S; the bloc-lt is then turned until the opposite screw 16 engages the slot 2?, in the other terminal 22, and both ot the screws lb are turned until their heads clamp the terminals 2Q against the terminals 7, when the bloei; will be securely held upon the plate. rEhe the block is formed with a semi-circular groove 20, the ends of ,which terminate in line with the binding screws 2G, and a hole 30 extends from the bottom ot this groove through the block. Lamp Wires 3l are passed through the hole 30, and one of them is clamped to the adjacent terminal 2Q by its binding screw 26, While the other Wire, which lies Within the groove 29, is connected to the 'opposite terminal Q2 by its binding screwY Q6. By reference to Fig. 5, it will be seen that when the block and ceiling plate are connected, the terminals 'T and contact, and in this Way the current from the feed wires passes trom the terminals 7 to the terminals and thence to the lamp Wires.

y The lamp Wires extend down trom the block to and around a grooved roller 3Q, secured Within a casing 33, containing a counter-balancing -Weight 34, through the center of 'which a short tube 35 extends. After pass-f ing around the roller 32, the lamp Wires eX- tend up through one of the holes 18- in the block, and around the roller 21 through the other hole 18A, and thence down through the tube to the lamp socket 35, which is provided with the usual hey Ator opening or closing the circuit tol the lamp. The lamp and its liXtures are balanced by the nf'eight 3l, so that when the lamp is moved up or down to any desired point, it will remain statiorugg/ until moved again.

In operation, the ceiling plate is secon- T by the eindin t-nen ce' to the terminals The lamp ner-.ted

g screws i0.

C which arranpemem permits the current to pass from the tecd Wires to the lamp n'ircs throuo'h the terminals. The

lamp, weight, and supporting fixture are then in operative order, and the lamp may be adjusted to any desired point, and .Will be held at that point by the Weight.

'the arrangement and construction of the fixture is such that the parts may be quickly connectet` and disconnected, and the liability ot short circuiting is eliminated.

Having described the invention, what I claimas new and desire to secure by Letters Patent, is

l.. ln a fixture of the character speciied, a non-comlneting plate having circuit feed `wire terminals; a non-conducting block having` lamp Wire terminals, said block having a semi-circular groove, the ends of which terminate adjacent to said terminals, and also ay hole extending trom said groove through the block, and a chamber having apertures at opposite points' extending through the block; a grooved roller in said chamber, and means for securing the block to the plate so that the terminals of said block and plate contact.

2. ln atlxture of the character specified, the combination with a non-conducting pla e.y having circuit feed Wire openings and terminals adjacent to 'the openings having binding screws, of a non-conducting block having therein a centrally disposed semi-circular chamber with bearing recesses in its side ivallsa. semi-circular groove in 'the tace of said block, a hole extending from said groove through the block and a hole through each end of the chamber; a pin in the bearing recesses of the chamber, a nonconducting grooved roller in said chamber mounted on the pin; lamp Wire terminals upon the blocl; having binding screws in line with and adjacent -to the ends of the semi-circular groove, said terminals being` extended beyond the sides of the block and provided with slots in their ends; and screws which pass through the said slots and into threaded holes in the feed wire terminals to clamp the block to the plate and cause the feed Wire and lamp wire terminals to contact.

f5. ln a. tinture of the character specified, the combination with a non-conducting plate having terminals adapted to be connected to circuit t'eed wires, of a block having terminals adapted to be connected to lamp circuit Wires, and means for connecting the lamp Wire terminals in contact With the feed Wire terminals; a non-conductingl tersects the groove.

4. ln a fixture of the cha acter speciied, the combination with a non-conducting oeiling plate having terminals adapted to be connected with circuit feed wires; of a removable block provided with lamp Wire terminals in Contact with the feed Wire terminals, and having a semi-circular groove in its iace extending from one terminal to the other, said block having also a hole therethrough which intersects the groove', a grooved, non-conducting roller in a chamber in said block, the chamber having oppositelv disposed apertures in line with the grooved tace el? the roller; and screws 'for connecting the lamp wire and feed Wire terminals.

5. rlhe combination with a lamp and a countelf-balancing weight, having a grooved roller, ot a` non-conducting ceiling plate having terminals adapted to he connected with circuit feed wires; a non-conducting block secured to the plate having terminals in contact with the feed wire termina-ls; a non-coiulncting grooved roller mounted in the block; and circuit Wires connected to the lamp, which extend through the Weight and around the roller in the block, thence around the weightl roller to the terminals upon the block. v

(S. In a device as specilied, the combination with a lamp, a counter-balancing Weight having a grooved roller, and a ceiling plate, having terminals adapted to be connected with circuit feed wires, of a circular noncondueting block secured to the plate, having terminals in Contact with the-feed Wire terminals; a non-conducting grooved roller mounted in a chamber in said block, the block being provided with a concentric semicircular groove which extends from one terminal to the other; said block having also a hole extending from said groove through the block; and circuit wires connected with the block terminals, which extend around the semi-circular groove and through the hole in said groove to and around the Weight roller, thence over the block roller and down through the weight to the said lamp.

ln testimony whereof l atlix my signature in presence of two witnesses.

HARRY WALLACE LAWRENCE.