US2391325A - Lighting device - Google Patents

Description

' Dec; 1s,- 1945.

Rgc. MA'URETTE LIGHTING DEVICE Filled March 2,9, 1943 l 3 Sheets-Sheet 1 REN a MAH/P5775 n'l/en for i ywm/ Dec. 18,'1915.

f R. G. MALJRETTE A Filed March', 1943 LIGHTING DEVICE y n l` 3 Sheets-Sefet 2 [11 :fen-fo j', I

REN ci ,IMU/IRENE lPatented Dec. 18, 1945 LIGHTING DEVICE Ren G. Maurette, Beverly, Mass., assignor to SylvaniaElectric Products Inc., Salem, Mass., a corporation of Massachusetts Application March 29, 1943, Serial No. 481,039

2 Claims. .(Cl. 24U-11.4)

v This invention relates to lighting devices, and has particular reference to luminescent lighting devices.

An object of this invention is to provide an improved luminescent lighting structure.

Another object is to provide an effectively portable luminescent lighting structure.

Another object is to provide a fluorescent lighting unit which may be moved about in a variety of positions and locations without interrupting its illuminating action. Further objects, advantages and features will be apparent from the following specification taken in conjunction with the accompanying drawings, in which:

. Figure 1 is an isometric rear view of an illustrative embodiment of this invention;

Figure 2 is a side elevation of the structure of Figure 1;

Figure 3 is a schematic'wiring diagram of the electricalvsystem used in the structure of Figure Figure 4 is an exploded isometric front view of the structure of Figure 1;

- Figure 5 is a view of ther assembly of thesupporting hook of Figures 1, 2 and 4;

Figure 6 is a section through the starter button assembly of the structure of Figure 1;

Figure 7 is an illustration of the end of the connection cord for the structure of Figure 1. showing the arrangement of the ground connection; and V Figure 8 is an exploded view similar to Figure 4, in illustration of an alternate structure,

The illustrative embodiment of this invention As in Figure 1, the illustrative embodiment of this invention comprises a fluorescent lamp unit I, a flexible electrical connection cord 2, and a ballast unit 3, mounted on the cord 2 in series Vconnectionwith one of the wires therein. The

unit I is provided with a hook 4 for hanging the unit on a support, and the cord 2 has an end plug 5 and a branch lead 6 as a ground connecas disclosed in the drawings shows a fluorescent lamp which may be moved about to various positions and locations, within the limits of the cord length. This structure is particularly useful to a workman moving about, or whenit is desired to illuminate hard to get at or confined 'areas or objects. IIt may, however, be used as a stationary fixture, if desired.

A 6 watt lamp in this structure provides a convenient portable lighting device. In referring to portability it is intended to express that the device is effectively portable, That is to say, it is portable within the limits imposed by its flexible electric connection cord. The references to the positionof ythe device are intended as specifying its arrangement, that is, whether the lamp is vertical, horizontal or facing up or down.

The `references to location are intended to be indicative of bodily movement of the device from one spot to another,

tion (Figure 7) for the body of the unit I. The ground plug vl may be threaded in as a permanent fixture, and the branch 4lead 6 is provided with a contact sleeve 8 for receiving the head of the plug 1.

The circuit diagram of this device is shown inFigure 3, in which the lamp envelope!! is provided with a pair of filamentary electrodes I (I and Il, having leads I2 and I3 and I4 and I5 respectively. Lead I4 includes ballast 31, lead I2 includes a snap action primary starter lamp switch I 8, and leads I3 and I5 jointly include a spring button secondary starter lamp switch I1, as at |11 in Figure 6. The ground lead. 61 in Figure 3 is illustrative of the lead 6 of Figure '7.

In assembly, the lamp unit, shown as exploded in Figure 4 comprises a box-like base I8 which hasa longitudinal slot I9 in its top, and which supports an assembly of an upwardly facing trough-like reector 20 and lamp sockets 2|,

The reflector 20 is joined with the sockets 2|v by means of bolts 22 threaded in openings 23'in the mounting platforms 24 of the sockets ZI. The sockets 2l rhave their lower portions within the base I8 so that the shoulders 25 engage the under side of the top of the base I8, adjacent the slot I9,. The platforms24 lie Within the slot I9, and the reector 20 rests on the top of the base The lamp 26 has base pins 21 Awhich are engaged for support and electrical connection, in the openings 28 of the sockets 2|, grill 29 is mounted over the lamp 26 and sockets 2I and on the reflector 20 with its body slightly sprung to move its side ledges 30 toward each other, The edges 30 are thus contained in the trough of the reflector 20 and held against lateral movement by the reilector side walls 3I.

An -arched or movement which would remove thev grill edges 30 from the trough of the reflector 20.

The hook 4 is pivotally mounted in one of the end caps 32, as in Figure 5. The cord 2,/ and leads I2, I3, I4, and I5' are shown in Figure 4 5 to illustrate their general location in the 4assem bly.

The primary starter snap switch I61 is mounted on the base I8 as shown in Figures 1 and 4 and corresponds to the switch I6 of Figure 3.

The spring button secondary starter switch I11 is also mounted on the base I8, as in Figures l and 6. This switch assembly comprises a housing formed by a pair of telescoping members 35 and 36 mounted through a circular opening 31 in l5 the body I8 and clamping the edgespf .the opening 31 between an annular edge.overhang 38 of the member 35 and the annular end 39 of the member 36. d,

The member "es is substantiany tubumr alla `2t contains a button 40 urged by spring 4I against.,

a shoulder 42 The electrical leads I4 and I5 are connected to contacts 43 and 44 respectively and pressure on the' button 40 bridges contacts 43 and 44 with a contact 45 to close the switch. 25

The lamp may be put inbperation, see Figure 3, by closing the snap switch I6 and the/'spring button switch I1, i thus completing a circuit through the filaments Ill and \I'I. The filaments are heated in this manner preparatory 'tosup-fy porting an arc through the envelope 9, and, after a time period of the order of=,a few seconds, the spring button is released, switch I1 opens, and an arc is struck through the envelope 9 across the filaments I and II/to produce'the usual fluo-y rescent lamp illumination.

The alternate assembly of Figure 8 comprises a base 46, a base `cover 41 on Which lamp sockets 48 are mounted, a lamp 49 to be mounted in sock-- ets 48, and an overallcover and shield 50 comprising endcaps I and grill 52.

The base 46 is in the form of a flat strip with laterally over andinturned side edges as at 53, terminating in upwardly extending I'flanges 54. Upwardly extending end tongues 55y are also formed on the base 46 with one, as at 56, vertically slotted to receive a lead cord extending from a power source to the sockets 48. The tongues 55 are resilient, and, in assembly, extend upward within the endcaps 5I of the cover 50 in end-wise outward gripping engagementthere.- with.

The base cover 41 is formed as an open-ended,

downwardly'facing channel with a top 51 and sides 58. The sides 58 t over the side flanges 54 so as to bring the sides of the endcaps 5I into substantially ush relation with the sides of the base 46. The lateral separation of the sides "58 is such, with respect to the lateralseparation of the side flanges 54 of the base 46, that a lateral 80 a:support; comprising a substantially fiat 'gripping action exists therebetween when assembled, either from'a force fitting or resilient gripping action, so that the base 46 and base cover 41 may thus be held together in subassembly.

Switches 59 and GIJ'are ordinary snap switches mounted in one of the side walls 58 of the base cover 41, and correspond to switches I6 and I1 fof Figure 3.

The top 51 of the base cover 41 is provided with openings through .which sockets 48 extend in their assembly with the cover 41. The sockets have lower, forwardly extendingy shelf' portions as at 6I which extend beneath the top 51 and are secured thereto. The shelf 6I corresponds to the shelves 24 of Figure 4 and may be formed in duplication thereof if desired.

The cover is an integral unit with the end caps 5I secured to and joined by the grill 52. One endcap has inwardly extending tongues as at 62 for engagement with the underside 'of the from each end of said base cover; a grill extendl ing in'an arch over said lampholders from one longitudinal edge of the top portion of said chan-r nel-like base cover toxthe other; end caps at each end of said base cover to enclose the ends of said grill and base cover and having tongues to engage said baseplatephook-like means for temporarily securingthe lamp device in operating position` and a flexible cable for conduction power to the lamp.

2. A portable fluorescent lamp device having a flexible cable to supply power to the lamp and means for temporary attachment of the lamp to ase platefa channel-shaped base cover member disposed with its open face toward said -base plate, flanges struck up from said base plate engaging the free` longitudinal edges of said base cover member to form a hollow enclosure, a pair of lamp holders projecting through the' top of said enclosure to hold a lamp, a perforated metallic arch shaped protective grill extending over said lamp holders, a pair of end caps embracing the ends of said grille and extending over and forming end closures for said enclosure and means for securing said bottom plate to said end caps to unite the complete device.

REN G. MAURE'ITE.

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