US1882185A - Lamp - Google Patents

Description

Oct. 11, 1932. H. J. GRAHAM \1,882,135

LAMP

Filed April 15, 1929 5 SheetsSheet 1 FIG. 1.

INVENTOR. HERBERT JGRAHAM ATTORNEY.

H. J. GRAHAM Oct. 11, 1932.

LAMP

Filed April 15, 1929 3 Sheets-Sheet 2 INVENTOR. HERBERT J. GRAHAM ATTORNEY.

H. J. GRAHAM Oct, 11, 1932.

LAMP

Filel April 15. 1929 5 Sheets-Sheet 3 INVENTOR.

HERBERT J. GRAHAM ATTORNEY.

Patented Oct. 11, 1932 *umrEosT-Arss HERBE T J. GRAHAM, or PH LAnELrnIA,

rnnns vnma, ASSIGNOR; r0 ELEQ'ITRIQ SERVICE SUPPLIES company, or P ILADELP IA, PENNSYLVANIA, A contorte- TION OF PENNSYLVANIA I Application filedlApril 15,

This inventionrelates toelectric lamps and more particularly to electrically operated flood lights, search lig ts, headlights and the,

like, which are intended for the projection of light over comparatively great distances or areas. I

The present invention is particularly adapted for use in connectionwith; lamps.

such as flood-lights, locomotive head-lights,

air-port lights and thelike, allof which are commonly characterized by the fact that in eachcase the lamp body or housing is'pofsitionally adjusted with relation to its support I to most effectively project the light rays ina predetermined direction. Once this initial adjustment between the lamp body and its support is obtained it is seldom disturbed unless altered circumstances necessitate achange thereof and so on. .To perform this main,

tenance work without disturbing the correct adjustment between the; lampgbody and, its support is not always easy, this because of the fact that the adjustment is often such that the particular part of the lamp body Whichit is desired to reach is rendered inaccessible unless the lamp body be' swung'into a position other than its correctly set position; Once the lamp body is swung out of its adjusted position forpurposes of inspection, repair or its proper position and even'then there. is no assurance that the'proper readjustment has been made. V .j

It is accordingly among the principal ob,- jects of this invention to avoid the aforementioned difflculties bythe provision; of means operatively associated; with an indexing device for locking the lampbody a predeterminedly set position with-relation to the support for -said lampbody, said means being operable: to perm-it the lamp body to be swung out of said position for purposes of inspection, repairs, replacement or thelike. 1

flight thus obviating the necessity LAMP 1a2s. "seria1 No. 355,182.

A. further object of'the invention is; the provision of a shiftable member adapted to be secured in a predeterminedly fixedrelation to the lamp support, the lamp being ro- "tatable: freely upon said support, together Wlth eans carried by said shiftable member for locking engagement with the lamp; Whereby to prevent rotation. of the latter with respect to its support.

It will be understood, of course, that the' initial adjustment between/the lamp body and itssupport must be eifected :at n ight in order to insure the most effective projection oflight in a given direction. Should this adjustment be disturbed, as when the lamp. is cleaned or inspected, it isordinarily necessary to again reset the lamp body at night. It is accordingly a still further ob- 'ject of this invention to provide means whereby the lamp body may be reset to its predeterminedly adjusted position by daywork uponthelamp. V

Other objects of the invention and advantages. resulting therefrom will appear more fully hereinafter.

" .T he invention consists substantially the combination, construction, location,'and relative arrangement of parts, all'fas will appear more fully hereinafter, as shown. in the accompanying drawings and as finally pointed out in the appended claims. In'the said accompanying drawings, which for purposes of. illustration show the invention as embodied in one form oftypical lamp, the like, it requires; great care to reset'it to H Figure 1 is'a front elevational view of a lamp embodying the features of the present invention Figure 2' is a side elevational' view of the lamp looking toward the indexing mechanism, the l'amp' body being shown. locked inp'osition for proj ecting" the light a sub-- of night I ner surfaces of the bracket arms 17 it being.

. and thrown'back into a position rendering it accessible for maintenance workto be performed thereon;

Figure am an enlarged elevational vlew of the indexing and locking mechanism as operativelyassociated with adjacent parts of the'lamp body and the support therefor;

Figure 6 is a vertical sectional view taken onthe lines 66;of Figures 2 and 5 {and 7 ;=F- igure' 7 is an elevational view; of the lockingmember per se. g

Referringnow to the drawings, it willbei.

seen thatthe lamp body or casing 10 is substantially drum-shaped and comprises an annular wall '12, a rear wall 11 and aswingf ably mounted front door closure 13,' the latter being provided with theusual lens14. Housed Within this lamp casing 10 is a suit "able reflector (not'shown) and anelectric lamp 15 constituting the source of light which is projected through the lens 14 in a predetermined direction. Supporting the lamp'body 10 for angular adjustment about a substantially horizontally disposed axis is' a- U-shaped bracket 16, the lamp body being lpivotal'ly mounted between the upstanding arms 17 of this bracket. As appears'most alent and in such manner that the vertical- -ly disposed web 19 thereof is spaced out wardly from said wall. The webs. 19 of the fittings are centrally apertured, as at 23, for

permitting the passage therethrough of bolts 24 which latter project through aligned openings25 provided in the upper portions of the 'bracket arms 17 and between which the fittings 18 are embraced. Nuts 26 threa d- I edly engage the outwardly projecting ends 'of'the bolts 24 whereby thewebs 19 of the fittingsare respectively held against the inunderstooid'from the foregoing that the bolts 24 constitute relatively fixed-bearings upon which the lamp bodyis supported for rotation about a horizontally extending axisQ As appears in Figures'l to 4 the1bracket'16 is in turnmounte'd for'rotation about'a vertical axis; the transversely extending branch 27,,of the bracket 'being secured in superposed relationjupon'ja suitable supporting base 28 throughjthe intervention of a clamp .bolt 29 having an operatinghandle- 30.- --In-- asmuch. as the lamp body is '{carried by th'er bracket, angular "adjustment lot the latter about a vertical axis (that is, with respect to the supporting -base 28) makes possible the 'fprojection of light "along any-desired line extending radially from said vertical axls.

Attachedto and overlying the outer surface of one of the arms 17 of the bracket 16 (in this instance that at the left of Figure is a vertically disposed plate 31 of segmental form; said plate being apertured, as

at 32, for passage of the laterally projecting ,bearingbolt 24. As appears most clearly in Figure 6-this plate 31 is suspended fromthe bearing bolt'24and is clamped against the bracket arm 17 by the nut 26. Preferably a washer 33 is interposed between the nut 26 and" the segmental plate 31. In addition to the aperture 32, the plate131 is provided in its bottom portion with an :arcuate slot- 34 that is concentric with the aperture 32 and consequently with the pivotal axis of the lamp body. V g

Threadedly secured to the said bracket arm 17 and projecting outwardly through-f the arcuate slot 34-of the segmental plate 31 is a stud 35, 7 They projecting end of the stud 35 'is threaded to take a wing nut 36 or the like, the function of said wing nut'being to se-- curely clamp the segmental plate 31 against the bracketarm' )17 whereby to prevent rota- [tionof the former about the bolt '24 as a center. It will beunderstood, of course, that by merely loosening the wing nut 36 the segmental plate 31 may beshifted inclockwise or counter-clockwise direction, the ends of the arcuate slot'34 operating to limit the extent of suchmovementrelative to the bracket arm towhich the plate-is attached. Thus,

in Figure 2 the plate 31 is shown in one adjusted position relativeto the bracket arm,

while-in Figure 3 the plate is shown in another adjusted'position. -The plate31 con- 'stitutes the indexing device by means of which a predetermined adjustment between 16 may be obtained. v

Hinged to the upper-edge of the's'egmental plate 31, as by a suitable 'pintle 37, and adaptedto overlie the upper branch 20 of the pivot fitting 18 is a leaf member 38. This leaf member 38, which isprovided in its free edge with a comparatively widenotch 39, is swingthe lamp body '10 an'd its supporting bracket able toward 'and' away from said fitting 18, the-arc of itsfmovementbeing indicated by the-dotted line of Fig. '6. It will be observed that'the inner 'port-ion 4O of the notch 39 is considerably reduced in width. Suitably secured to I and projecting upwardly of the upper branch 20 of the pivot fitting-13m a threaded stud 41, said'stud being so disposed that when theleaf member 38 is in the opera- "tive position shown in Figures 2, 3 and Bit is closely embraced by the side Walls of, the reduced portion 40 of the notch 39. Thread- "edly engaging the projecting end of the stud 41 is a winged nut*42 which operates, when tightenedup'on'its stud,-to lock the leaf member in operative position. In order to swing ice . the leaf member upwardly and away from the pivot fitting of the lamp body it is merely necessary to backoff the wing nut l2 to an extent sufficient to permit the widened portionof the notch 39 to pass freely over the said nut. It willbe understood, of course, that the leaf member 38 is shiftabie with the segmental plate 31.

The operation of the indexing device can. now be described as follows. Figures 2 and 3 show two possible positioned adjustments of the lamp body relative to its supporting bracket, the former showing the lamp positioned for projection of light in a horizontal direction and the latter for projection of light in a downwardly inclined direction. To secure these or other adjustments, it is first necessary to lock the lamp body to the segmental plate 31v through the leaf member 08 so that the lamp body and said plate 31 may be rotated'as a unit about the common axis of the bolts 24. Having determined the proper angular adjustment of the lamp body with respect to said axis, the segmental plate 31 is then clamped securely to the adjoining arm 17 of the bracket by means of the clamping nut 36, the lamp body being thus maintained in adjusted position due to the fact that it is locked to the segmental plate 31.

In order to swing the lamp body into the position shown in Figure & without disturbing the proper positional adjustment between said body and its supporting bracket, it is merely necessary to back ofi the wing nut 42 as explained hereinbefore to permit the leaf member 38 to be swung into the inoperative position shown by the broken lines of Figure 6. The lamp body is then free to swing about the bearing bolts 24 independently of the supporting bracket 16 and the segmental plate 31, yet said bracket and plate are maintained in their predeterminedly set relation. Having performed whatever work is to be done on the lamp it is an exceedingly simple matter to swing the lamp body back into proper position such that the upper stud 41 may be again embraced by the notched leaf member 38. All that then remains is to tighten the wing nut 42. p i

It Will be understood, of course, that various changes may be made from timeto time without departing from the general spirit or principles of the invention and that said invention is equally applicable to structures differing in form from that described herein. It is accordingly intended toclaim the invention broadly, as well as specifically, as indicated by the appended claims.

What is claimed as new and useful is:

1. In a lighting device, in combination, a lamp body, a support for said body arranged to permit angular movement of said body about an axis extending transversely thereof, an indexing member shiftable with respect to said lamp body and said support about said axis as a center, and a swingable detent carried vby said shiftable means for quick-detachable engagement directly with" saidlamp body.

In combination, a lamp body adapted for angular adjustment about a fixed axis, indexing-means for said lamp body including a pivoted member having a free end arranged for releasable engagement with said body, means for securing said indexing means in adjusted position, and means for securing said pivoted member to said lamp body, thelatter being freely rotatable about said axis upon disengaging said pivoted member therefrom.

I 3. In combination, a relatively fixed support, a lamp body mounted upon said support for angular adjustment with respect thereto, a plate member carried upon said. support, said member being also angularly.

berdirectly to saidlamp body whereby any angular movement of the former will be imparted to the latter, said connecting means i being operative to insure only a single positional relation between said lamp body and plate member.

4. In combination, a relatively fixed supmember being provided with an arcuated port, a lamp body rotatably carried thereby, a plate member adapted for rotation about the axis of rotation of said lamp body, said slot concentric to said axis, means carried bysaid support and projecting through said slot forsecuring sa1d member in a predetermined angularly adjusted position with re spect tosaid axis, a slotted member hinged to said plate member, the slotted portion thereof being adapted to engage said lamp body, and means carried by said lamp body and projecting through said slotted member for 'releasably securing said body to said plate member.

- .5. In combination, a lamp body arranged for rotation about a relatively fixed axis,

and an indexing device operatively asso-..:-.

ciated therewith, said device including a pair of hinged members, one of which is adapted for angular adjustment about said c axis and the other'of which constitutes a de-' tacha'ble connection between said angularly therewith, said device including a member 5.

angularly adjustable about said axis and having a hinged extension, the free end of said extension being arranged to detachably engage said lamp body.

7. In combination, a lamp body arranged for rotation about arelatively'fixed axis I l and having an offsetportion; an indexing device also arrangedfor 'rotationgabout said axis, said device lncluding arhlnged element adapted to overlie said 'ofiset portion of said lamp body, and means carriedby said oflt'set portion for detachablycsecuring said hinged element to said offsetportion whereby upon shifting saidindexing deviceinto a predev termined adjusted position'a' corresponding I movement will be impartedft'o said lamp body, the latter being freely movable out of its adjusted position upon detaching said hinged element from said offset portion.

8. In a lighting device, in combination, a i relatively fixed support, a lamp body pivo tally carried uponsaid support androtat 40f said-stub shaft,-said member being shift-1 able relatively to said lamp body. I

I 9. In a lighting'unit, in combination a 7 lamp body adapted for rotation about a rela-' tively fixed axis, indexing means 'for'estab lishing, a predeterminedly fixed angular re-l "lation between said body and said axis, and

means arranged independently of said body for securing said indexing means in adjusted v position, said indexing means. including a swingableelement for connection to the body. said element being disconnectiblefrom the body to permit the latter to be freely rotated about said axis. i

I affixed my signature.

able about a relatively fixed axis, a member 1 rotatablewith said body about said fixed' f axis, said body being'provided' with a radially extending stub-sliaftprojecting through said support and member, means for securf i mg 'saidmember ln adpistedrposltion, and I means for qu ck-detachably interconnecting.

said lamp body and member independently In testimony whereof, I have hereunto HERBERT J; GRAHAM.

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