US1768757A - Lamp - Google Patents

Description

July 1, 1930.

H. J. GRAHAM LAMP Filed July 5, 1927 3 Sheets-Sheet 1' I ATTORNEYS.

y 1, 1930. H. GQAHAM 1,768,757

LAMP

3116a July 5, 1927 5 She ets-Sheet 2 wmmumnmm WITNESSES @ANORNEY I y 9 H. J. GRAHAM I I 1,768,757

LAMP

Filed July 5, 1927 s Sheets-She et 5 62 gmm 47/14 .105 ,9 .55

. WITNESSES INVEN TOR:

070 li zfien? JGrakam, W fl 6% BY W ATTORNEYS.

rivetsor screws 23. The arched portions 21 20, as best shown in Fig. I, and being re-"' taineyl-againstloosening by cotter pins 26.

i y the leftin Fig. I) is attached a die-stamped of the fittings are centrally apertured for passage of the pivot bolt-s 24 whichextend through aligned openings near the upper ends of the upstanding extremities 19 of the bracket 19 ,the nutheads 25 associated with said boltsocoupying the arches of the fittings the tallest of the, upstanding extremities 19' of the bracket 19, (in this case the one at arcuate segment27, the same having its ends pierced to take securing rivets 28. This segment. 27 has a substantially semi-circular medial arcuateslot 29 (Fig. II) that is' concentric with the pivotal bolt axis 24otthe lamp body portion 15, and guides a clamp bolt 30 at the endvof an arm 31 separately attached'tothe pivot fitting 20 at the 00%;!)- I spending: side of the lamp structure. outer end-of thebolt 30 is threaded for engagement 'by a clamp handle 32 (Fig; I) whereof the boss engages the contiguous face of the segment 27 (which maybe roughened or transversely serrated) to securely hold the lamp body portion 15 in the desired position of adjustment. 7 y 7 As shown in Figs. I, II and IV, the bracket.19 has an off-center swivel connection at 33 with. a somewhat; triangular. supporting base 34 which is of hollow construction and formed with a slot 35 that/is *concentric with-the swivel center 33 to guide a clamp bolt 36. The head 37 of this bolt 36 overlaps the edges of the slot 35 within the .hollow base 34, while its protruding end is threaded to take a clamp handle 38 to clamp the bottom of the bracket 7 19 against theserrated margin 39 at the outside of said slot; Thus by swinging the bracket 19 on its swivel axis 33, the lamp body can be angularly adjusted in a horizontal plane to any position required, and the adjustment fixed by-tightening up on the clamp handle 38. v Referring now more particularly to Figs. III, V and IX, it willbe noted that the annular portion 15 of the lampbody hasan inwardlyqounded head or flange 40 about its frontal opening affording a recess for an annular cushioning 'gasket41 which serves .botha s a cushioning for the peripheral flangelfi'f of the lens 16 and a weathering 'thereaboutlto prevent entry'of rain water or moisture; The lens 16 is removably held f in position against the cushioning gasket 41 hi3. E ha.

b' retaining means 42,. which, as shown in ig. I, are circumferentially arranged at intervals ,around'the interior of the lamp body portion 15. Each such retaining means comprises (see Fig. VI) a-tongue 43 of sprmgy metal, and a, detachable clip 44 also of spr ngy metal. The tongue43 aperclip is held inyieldin other purposes.

tured centrally near its front edge for passage of a screw or rivet 45, Fig. V, by which it is secured with said front edge resting square against a circumferential shoulder 46 within the lamp body portion 15, the opposite end of the tongue 43 being thus'left free for yielding spring action. In the assembled position of the retaining means 42, the rear edge of the detachable clip. 44 engages behind an upturned heel flan e 47 at the free end of the tongue 43, so t at the laterally turned face 44 at the forward end of said contact with the peripheral flange 16 0' the lens 16 at the 3.01:. The clip 44 is held against displacement in the relation just described, by means ofa spring wire bail 48 having its ends pivotally' engaged in aligned joggled receiving ment, obviously very little time is required in removing the lens 16,.for replacement or 1 As shown in Figs. II and III, the door 17 closing the lamp body at the back is concaved so as to conform to the removable reflector 51 which it carries, said door having at one side apair of laterally-extending vertically-spaced horizontal arms 52 to engage .a hinge pintle 53 that is supported, at opposite ends, by bearing arms 54 reaching rearward from the corresponding side of the body portion .15 to meet the arms 52 aforementioned.

.The reflector 51 is preferably made from frangible material such as glass or porcelain; and in order to protect it against injury from shocks or jars, I provide cushioning means in the form of, spring fingers 55 which. are arranged at intervals about the door 17 toextend radially inward from their anchorages where rivets 56 are employed for the purpose of securing them, see Fig. IX. These fingers 55 are bent from comparativelg thin strip metal to the configuration s own in F i VIII, and each is faced with :1. padding 0 felt or like material over the re ion where it contacts'with the back of the re ector 51. To hold the reflector 51 in place, I preferably'employ retainin means 42 whic will be observed from ig. III as identical with those by which the frontal lens 16 is secured, one such retaining device being usedin association with each of the cushioning fingers 55, see Fig. I.

In order to effect a weather tight seal be; tween the hinged door 17 and the body pormammals? tio'n -lh and itocarry off any accumulation of rain water.atgthes nncture, 1 make provisions as follows forming an angular circumferential,shoulder 60. vlipplied about this. angular :shoul- =der '60;is an annulus 61 fashionedfrom' very thin spring sheet metal .tothecross-sectional, or what may for convenience, ibeytenmed revert-gutter formshown in FigIX; that isto say, with :anangular channelled portion. orxgutter :61 to fit the shoulder 160, :and

a rolled portion 61 :that extends outward over-and beyond'the flange 58.of the doorweather tight-juncture between the door 17 and theil'amp bodyportion 15. From'Fig VII it will .be observed that the annulus 61 is split at the bottom, as at 64, for drainage ofrain water from its rolled circumferential portion'61".,as-wel l as fronithe guttertilfl in the event ofwaterflea kage pastithe closure. a Two screws .65 are; used adjacentjithe split fi l as thesole meansfor esecuringgt-he an nulus 61 to the flange 59. The door "1-7'is held closed, and the. rolled portiorrftSl' of the annulus '61 maintained in i'compression, by latching bolts 6,6. which :are pivotaliyv conneoted to the lamp ioiody portion 1J5i'at 67,1

and equipped with: ring nuts 68 tow-engage clevised lugs 69 on the door I 1 v The provisions for :adjustin'gthe incandescent bulb 1-8, as shown Figs TX to XI inclusive, -comprise-a@circular plate 70 which is secured by means ofscrews 71 overiian opening 7 2' in the top ofzthe lamp .iboclyportion 15.. At its center :the platefTO has" an apertured semi-spherical* depnession-' 73 which-serves as a seat. for a .ball .74 having. an-inwa-rd tubular extension- 75 terminating in a cross head 76. This cross head 76 is apertured at 77,77 to guide-studs 78pm-v jecting upward from the socket .79. for the .illuminatingbulh 1 8; vBy this arrangement,

3 the bulb-18 is rendered adjustableradially of the lamp body through the: aid of a screw 80 that, engages an internal-thread in'the lower end of the tubular extension 75Yand hasits head "81 lodged, with capacity for independent rotation, between companion cross pieces '82, '83 whereofthe ends-are correspond-ingly apertured to take'the reduced shouldered portions of the guide studs 78,

and with the latterseoured tothe socket 79 5 by screws 84, see Fig. X. The upper end of I the adjusting screwSOis siotted for engagement by the flattened inner extremity of "a F manipulating ;.stem85 that extends axially 'LAS ShOWIl igshlilrl, and. IX, thedoor '17 has aperipheralflange 58 as well as an annularfiange 59, theitwogjointly' t-hrou ghythe' ball i-zandtube 75 from the exterior of the lamp body portion '15,=a'nd.at

itsouterond is equipped. with a knurled-fin :ger-knob 86. A circumferentially-projeating v spring band'87 lodged in a groove about the manipulating ste'mi8'5. near its. inner end, serves. 1n cooperation wlthsstop screws 88 let into theside of; the tube 7 5, to normally prevent withdrawal of said stem. 'fTheball 74L,

it will be seen, permits angular adjustment of the, illuminating bulb 18 in all directions so that the latter can. be positioned accurately with. regard to therreflector -5:1 :asrequired to determine the proper focus and, accordingly,the maximum projection of light from the lamp. For the purpose of. securely 1 holdingthe illuminating bulb 18 in the desired adjusted position, IYprovide a bridge 1 piece :89 having an I apertured semi-spherical recess 90 to. constitute the upper half ofthe socket for the ball 74.1;The bridge piece 89 is hooked, as at 91," for. fulcrum engagement beneathfthe plate 70,'and a lateral extension 92'ithereof'is pierced for passage of-a clamp .sc'rewa98 taking intosaid' plate at the opposite side. qcThe headi9e of the clamp screw '93 is diametrically apertured for traverse of a slid-able handle rod 95'. 'Thefunction of protecting the manipulating stem8 5, the

clamp screw 93 as well as other associated partsfrom the weather, is vested in a dome .lilrejcover 9 6 which fits over an annu'l ar .ifange97- of the-plate 710 and isretained in position: by abail '98, with impositionof pressure to maintainan internally sup-ported ring gasket 97* in ifiuid tight engagement with the, rim ,ofjsaid flange. The trunnions ametral-reoessesw99 in the lower face of the, plate 70 "(see Fig. X), and haveY-their ends upturned to engage behind retaining shouldens 100 in the recesses. The 'baijl 98'is 'made of spring wire and yieldinglyengages a central depression 101 in the dome'cover .96.?with a snap fit, this featurejbei ng olearly L-E Eof the bail :98; are pivotally engaged dii I illustrated in Figs. IX and In order 'thatth e fa'djusti-ng means for the bulb 1 8 may, if:desired,:;be' transferred tothe lower part of the lamp, thebo'dy portion 15 is provided at that region withian auxiliary opening 102 which is normally closed "by a 're movable cover plate 103, (Fig. I); To ad justthe'illuminating' bulb 18, thebail v98 is first swung downward and, the protective cover- 96 removed. The. clamp 'screw 93*is thereupon loosened to, release the ball .74, then, by combined rotation and angular swinging 0f the stem 85', the bulb .18 is moved about until the proper focus is had.

The clamp screw,"93'isthereupon tightened i with imposition i of pressure upon the ball 74L to restrain it against subsequent displace.-

merit, and the finally'replaced.

protective cover 96, again j iThe current carrying conductors 10,5

I) enter the lamp through a hushed opening 106 in the lower partof the lamp body portion near the bottom, and extend around one side. of the latter to the bulb socket79. Suitable clips'107 serve to hold the conductors 105 in place with provision of adequate slack to permit adjustment of the illuminating bulb 18 in the manner hereinbefore explained.

1. Alamp of the character described coin-' The lamp may bev equipped with a. visor such as shown at 108 in Figs. I and II, the name being cut from sheet metal and attached by means ofscrews or rivets 109v to anintegral flange 110 projecting forwardly around the upper part of the lamp body portion 15. I V V s.

It is .tobe particularly observed that the lamp of my invention, with the exception of the bodyportion 15, the door 17 and the haso34, is constructed from stock material cuter bent to shape, and that therefore very littlamachining is required except for the and tap ing of holes. This feature is obviously con ucive to economic manufactare which is a very important consideration" in connection with lamps of comparatively prising a hollow body to enclose an illuminatin means, a lens closin a frontal opening o the lam body, a re ector, and a carner therefor c osing-in the back of the lamp body; in combination with a number of cireumferentially arranged retaining means to hold the lens and reflector in place, each such retaining means including a flexible tongue adapted to be. secured to the. lamp body or reflector carrier aforesaid, and a detachable o flange of the flexible tongue for m'ainte-.

clip with one end engaging behind a heel nance of a bearing face at its other end in contact with the-lens or reflector.

2. A lamp of the character described comprising a hollowbody to enclose an illuminating means, a lens closin a frontal opening in the lam body, a re ector, andacarrier therefor c osing-in the back of the lamp body; in combination with a number of circumferentially arranged retaining means to holdthe lens and the reflector in place, each such retaining means including. a flexible tggligue adapted to be secured to the lamp p aQdetachable clip with one end engag ing hind a heel flange of the flexible tongue for maintenance of a bearing face at its 'otherend in contact with the lens or reflector, and a retaining-bail swingable over the clip to normally hold it in place. i

3. A lamp of the character described comprising a hollow body to enclose an illuminatingmeans, a lens closin a frontal open ing in 'the lam body, are ector, and a carrier therefor c osing-in the back of the lamp body; in combination with a number of circumferentiallyarranged retaining means to hold: the lens and reflector in place, each such retaining means including a flexible tongue adapted to be secured to the lamp body or reflector carrier aforesaid, a detachable clip with one end engagin behind a heel flangeof-the flexible tongue or maintenance ofa'bearing face at its other end in contact with the lens or reflector, and a retainin bailpivoted by the flexible tongue and 1a apted to engage with a snap fit in a recess of the detachable clip.

4. A lamp of the character described comprising a hollow body to enclose anilluminating means, a removable I reflector Y of frangible-material supported by a closure for the hollow body, spring fingers with cushioningpads arranged about the closure to cushion the reflector, and associated retainers comprising co-operative fixed and detachable yielding components to hold said reflector .in place against the spring fingers aforesaid. g 5; Alamp of the character described comprising a hollow body to enclose an illuminating means a removable reflector of frangible material supported by a closure for the hollow body, spring fingers with cushioning pads arrangedradially about the closure to cushionthe reflector, and retainer devices each comprising co-operative fixed and detachable springy components individually associated with the spring fingers to hold the reflector in place.

6. A lamp .of the character described comprising a hollow body to enclose an illuminating means, a reflector carrying door permitting access to the interior, and a yielding metallic weathering element of revertgutter cross-section extending circumferentia'lly about the door and forming a fluid tight seal with the lamp body.

7 A lamp of the character described comprising a hollow body to enclose an illuminating means, a reflector carrying door permitting access to the interior, and a yielding metallic weathering split-annulus extending circumferentially about the door and effecting a fluidtight seal with the body portion, said"annulus enbra'cin'g paralleling revert-gutter sections to catch and carry ofi rain water collecting on-either side of the door.

A lamp of the character described comprising ahollow.body, a reflector carrying door adapted to close circumferentially opposite end of the holder in contact'with "fsaid lens. In testimony :whereof, I have hereunto signed my name at Philadelphia Pennsyl Vania, this 24th day of'June 192 i HERBERTJ. GRAHAM;

9. A lamp of the character described comprising a hollow body, a reflector carrying door adapted to close circumferentially against a seat surrounded by a projecting edge flange of the body, said flange defining a tapered approachvto the seat, and a split metallic annulus secured around the door, said annulus embodying a channelsection portion secured to the door and a rolled-over yieldable revert-projection overlapping the circumferential edge thereof to effect a weather-tight seal through cooperation with the tapered approach afforded by the flange aforesaid, and also serving as a gutter to catch and carry off rain water. i

10. A lamp of the character described comprising a body, a reflector carrying door adapted to close circumferentially against a seat surrounded by a projecting edge flange of the body, said flange defining a tapered I approach to the seat, and a metallic annulus embodying revert-guttersections, one of which is securedaround the door, while the other has capacity for circumferential expansion to cooperate with the tapered approach afforded by the flange aforesaid in effecting a weather-tight seal.

11. In a lamp. of the type described the combination of a body, lighting means positionally adjustable within the lamp body,

alens atthe front of the body, a reflector carrying door closing the rear of the body thereby to enable access to the reflector without necessity for disturbing the adjustment of the lighting means aforesaid, means enabling positional adjustment of the lighting means, and split metallic annulus embodying a channel-section with a paralleling revert rolled-over gutter section, the latter insuring weather tightness between the lamp,

body and closure door, and both sections serving to trapand drain'oif any accumu lation of moisture. p 7

12. A lamp of the character described comprising a hollow body having a frontal opening, an illuminating means housed within said body, a lens covering said frontal opening, retaining means for securing said lens in position including a flexible tongue having a heel flange adapted to be secured to the hollowbody adjacent the outer edge of the lens, and a detachableholder having one end engageable behind the'heel flange I of the flexible tongue for maintaining the

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