US2267669A - Street lamp - Google Patents

Description

IDec. 23, 1941. H. R. RoBVINsQN ET AL 2,267,669

STREET LAMP Filed July 24,'1940 2 sheets-sheet 1 Dec. 23,1941. H. R, ROBINSON ET AL 2,267,669

,STREET LAMP Filed July .24, 1940 2 Sheets-Sheet 2 by, h m

Patented Dec. 23, 1941 UNITED STREET LAMP Hilyard R. Robinson, Washington, D. C., and Aksel J. C. Knudstrup, Vienna, Va.

Application July 24, 1940, Serial No. 347,292

(Cl. 24U-25) 7 Claims.

This invention relates to lamps and more particularly to street lamps.

An object of this invention is to provide a street lamp including a metal standard and a plurality of inverted metal reflectors on the standard for projecting light rays downwardly without causing glare.

Another object of this invention is to provide a lamp of this character wherein the reflectors will not be broken as in the case with glass globes now in use so as to save the expense of l replacing the globes.

A further object of this invention is to provide a street lamp which is so constructed as to direct the light rays downwardly and outwardly from the light source.

A still further object of this invention is to provide a street lamp including a plurality of confronting metallic reflectors and screen means between the reflectors.

A further object of this invention is to provide in combination with a street lamp having metallic reflectors and metallic insect screens removably positioned between the reflectors.

A further object of this invention is to provide a street lamp which is so constructed as to facilitate the replacement of light bulbs.

A further object of this invention is to provide in a street lamp a lower upwardly directed reflector, an upper downwardly directed reflector, and an intermediate reflector, the intermediate reflector being provided with reflecting upper and lower surfaces for correlation with the upper and lower reflectors in reflecting the light rays emanating from the light source.

To the foregoing objects and to others which may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts as will be more specically referred to and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the invention as claimed.

In the drawings:

Figure 1 is a detail side elevation, partly broken away and in section, of a street lamp constructed according to an embodiment of this invention,

Figure 2 is an enlarged fragmentary vertical section through the upper portion of the lamp,

Figure 3 is a sectional view taken on the line 3-3 of Figure 2,

Figure 4 is a fragmentary sectional view taken on the line 4--4 of Figure 2,

Figure 5 is a sectional View taken on the line 5--5 of Figure 4, and

Figure 6 is a fragmentary sectional view taken on the line 6-6 of Figure 2.

Referring to the drawings, the numeral I0 designates generally a base which is adapted to be secured by anchoring members I I to a base block I3. A standard I2 extends upwardly from the base I0 and the upper end of the standard I2 has a cap I4 mounted thereon. The cap I4 is provided with an upper flange I5 engaging over the upper end of the standard I2 and a plurality of clamping rods I6 are threaded into the cap I4 and extend through the top wall or flange I'I of the base I0 so as to tightly hold the standard I2 on the substantially frusto-conical base ID.

A sleeve I8 is disposed about the upper portion of the standard I2 and is provided with a pair of spaced apart peripheral ribs I9 which constitute reinforcing means for the sleeve I8 and also decorative means therefor. A set screw 20 engages through the lowermost of the ribs I9 and tightly holds the sleeve- I8 on the upper end of the standard I2. The upper end of the sleeve I8 is formed with an outwardly extending flange 2| and a cylindrical or upstanding flange 22 is carried by the horizontal flange 2 I.

A lower upwardly directed reflector generally designated as 23 is secured as by fastening devices 24 to the cylindrical flange 22. The reflector 23 comprises a substantially flat base` plate 25 which at its marginal edge is formed with an upper and outwardly tapered side wall 26. The base plate 25 has a relatively large opening 21 formed axially thereof, the purpose for which will be hereinafter described. A substantially triangular rib or shoulder 2B is formed on the upper end of the side wall 26 and a cylindrical flange 29 is formed with the side wall 26 and extends upwardly from the shoulder or seat 28. The inner surface of the reflector 23 is formed of light reflecting characteristic so that light rays from a light source disposed within the reflector 23 will be reflected upwardly.

The cap I4 on its upper side is formed with an upstanding cylindrical flange 30 and a cylindrical supporting member 3| engages about the flange 30 and is secured at its lower end to the flange 30 by means of fastening devices 32. The cylindrical supporting member 3| is adapted to have a light reflectingouter surface and terminates at its upper end substantially flush with the shoulder 28. The upper end of the supporting member 3| is formed with a spider 313 which has a sleeve 34 at the center thereof. An intermediate reflector generally designated as 35 is secured as by fastening devices 36 to the supporting member 3| and extends upwardly above the lower reflector 23 and terminates at its outer lower edge at a point below the upper end of the reflector 23.

The intermediate reflector 35 comprises a substantially inverted frusto-conical central portion 31 which is formed at its lower end with :a ange 38 engaging the marginal portion of the spider 33. The intermediate reflector 3l also includes a concave-convex outer reflecting portion 45, the outer edge of which extends substantially below the upper end of the lowerY reflector Z3. In transverse section through one-half of the intermediate reilector 35, the reflector has substantially the configuration of a spiral curve with the smaller portion thereof innermost.

A pair of light sockets 4| are disposed within the lower reflector 23. Each light socket 4| has secured thereto a hollow substantially L- y shaped supporting arm 43 which` has a base flange i4 engaging against the supporting member 3|. The base 6d is secured to the supporting member 3| by fastening devices 45. The supporting member 43 is adapted to have a pair of wires extended therethrough and the supporting member 3| is formed with an opening 4t communicating with the passage 47 in the supporting member 44 so that a ypair of wires may be extended from the interior of the supporting member 3| through the opening 45, the passage 41 and to the socket 4|. A light bulb 48 is adapted to be mounted in each socket 4|. As shown in Figure 3 the light sockets ll are disposed in opposed relation so that the two light bulbs will be disposed on opposite sides of the supporting member 3| and within the lower reflector 23. A conduit |59 is disposed axially of the standard l2, and is threaded at its upper end through the cap li and locked by a lock nut 55. A hickey 5| is threaded onto the upper end of the conduit 49 above the cap |4 and a short pipe or nipple 52 is threaded into the hickey 5| and extends upwardly through the sleeve 34 of the spider 33.

A light socket 53 is carried by the upper end of the pipe or nipple 52 above the spider 33 and a light bulb 5t is adapted to be mounted in the socket 53. The intermediate reflector 35 is formed with light reflecting upper and lower surfaces so that the light rays emanating from the light bulbs d8 will be reflected outwardly and downwardly by the lower surface of the intermediate reflector 35 and the light rays from the light source 5d will be reflected upwardly by the reflecting upper surface of the central portion 31 of the intermediate reiiector 35.

An upper reflector generally designated as 55 is disposed in upwardly spaced relation to the intermediate reflector 35 and comprises an` outer reector parl; or section 5`| in substantially the form of a ring which has a` concave innner reflecting surface 58. The inner edge of the outer part 57 of the upper reector is formed with a downward offset flange 59 on which the outer edge of an inverted cup-shaped inner reflector part or section 55 is adapted to engage. The inner part 5|] is formed at its lower edge with an annular rim 6| and the upper inner part 6|) is adapted to be removably secured on the flangel 59` by fastening devices` 62. The provision of the removable upper reflector part 6.0 provides. a-

meanswhereby. the light bulb 54 may be-readily acer/nce replaced and in addition the fastening devices 35 may be engaged with a tool through the top of the device so that the intermediate reflector 35 may be removed in order to replace the light bulbs 48. The upper reflector is supported in upwardly spaced relation from the intermediate reflector 35 by means of a substantially annular supporting means generally designated as 63. This supporting means 63 comprises a plurality of arcuate frame members Sli which includes an angular member 65, a lower angular member 66 and connecting bars S7 at the opposite ends of the angular members 55 and 56. A screen 5S engages against the outer side of the frame member 64 and is held against the inner frame structure 64 by an outer frame 69 which is secured to the inner frame 64 by fastening devices 15. The screen 58, as shown in the drawings, is formed of woven wire mesh but it will be understood that the term screen as used in the specincations and claims applies to woven mesh material, spiral or parallel closely spaced wires or bars. The screen 68 is secured at its upper edge to the under surface of the upper reflector 56 by fastening devices l| which engage through the inner frame 6d and extend into substantially right angular lugs 'i2 which are carried by the inner surface of the upper reflector 55. The screen sections 64 are disposed in edge abutting relation so that when they are in assembled position they will form an annular screen.

The lower angular member has formed therewith an outwardly extending lug 'I3 which is formed with an offset shoulder Ml which is adapted to engage the adjacent edge of an adjacent screen section 64 so as to hold the adacent screen section in applied position. A bolt l5 is extended through the lug '.43 and is threaded into a substantially right angular lug 'l which is fixed to the upper surface of the intermediate reector 35. In this manner the several screen sections 34 may be fixed relative to the intermediate reflector 35. The screen structure 63 not only provides a means whereby insects are prevented from entering the space between the upper reflector 56 and the intermediate reflector 35, but also provides a means for supporting the upper reflector 55 from the intermediate reflector 35.

The intermediate reflector 35 at a point outwardly of and below the lower edge of the upper reector 56 has mounted thereon a street name plate holder Tl. The holder is arcuate longitudinally and is of -channel shape and a transparent or translucent name plate 'f8' is adapted to be removably mounted'in the holder Ti. Preferably, the curve of the holder Tl is slightly greater than theV curvature of the reflector 35 above the lower edge of the reflector 35 andthe holder 'I7 adjacent the outer end portions thereof is formed with inwardly projecting extensions i9 which are fixed as by'soldering, welding or the liketo the reflector 35. The panel or name plate '|33V is adapted to be lighted by rays passing between the upperand intermediate reflectors which are-reflected from the light source 54;

A lower screen structure generally designated as 8G is interposed between the lower reflector 23 and the intermediate reflector S5. The lower screenA structure isl substantially in the formof an. inverted frusto-conical screen and comprises a plurality of edge abutting arcuate sections Bl. The arcuate sections 8|- have a screen S2 secured between inner and outer framesections 83; and 84 and preferably, the frame secf tions 83 and 84 have upper andl outwardly extending end bars 85, which as shown in Figure 3, are adapted to be disposed in side abuttingrelation. The frame structure 8l also includes an arcuate lower bar 86 disposed on the inner side of the screen 82 and an outer lower bar 81 which engages against the outer side of the lower edge of the screen 82. The two lower bars 83 and 81 are secured together by fastening devices 88. Preferably, the annular flange 29 is formed with an upwardly opening slot 89 through which the fastening devices 88 may be contacted by means of a tool in order to loosen the lower screen bars 83 and 81. The lower edge of the screen structure 8D is adapted to seat on the rib or shoulder 28 and the upper edge of the screen structure 89 is adapted to be secured to the under side of the intermediate reflector 35 by fastening devices 90 which engage through an upper flange 9| carried by the frame sections 8 I The reflectors 23, 3'5 and 56 are adapted to be made out of metal so that the lamp structure hereinbefore described will not be readily broken when struck by any flying object. The lamp structure hereinbefore described will provide indirect light rays which are directed outwardly and downwardly from the light source so that adequate lighting will be provided about the standard I2 and the base I0 without forming a glare.

The light bulbs 48 may be made available for replacement by loosening the set screw and dropping the sleeve I8 with the reflector 23 attached thereto downwardly of the standard I2. This will expose the light bulbs 48 so that they may be replaced or any other repairs performed l in the light or reflector structure. When the lower reflector 23 and the sleeve I8 are lowered, the lower screen 80 will remain secured to the intermediate reflector as the lower edge of the lower screen 88 merely rests on the rib or seat 28. The base l0 of the standard I2 may be provided with an inspection plate 98 which may be secured to the base I0 by fastening devices 91.

A lamp structure constructed according to this invention will provide adequate indirect or nonglare lighting for streets so that the surfaces of the streets will be properly lighted, whereas the dwellings adjacent the street will not receive the glare from the street lamps as is at present the case. In addition, the construction of the reflectors out of metal will save a considerable replacement cost over the glass globes at present in use so that the use of a street lamp of this character will not only provide more elcient non-,glare lighting for streets, but will also provide an economical lamp structure which will not easily become damaged.

What we claim is:

1. A street lamp comprising a hollow standard, a sleeve detachably mounted about the upper end of said standard, an outwardly extending flange carried by the upper end of said sleeve, a cylindrical flange extending upwardly of said rst flange and having a diameter greater than the diameter of said sleeve, a cap on the upper end of said standard, cap retaining rods in said standard and fixed at their upper ends to said cap, an annular upstanding flange carried by said cap, an upwardly directed lower reflector, means securing said lower reflector to said -cylindrical flange, an inwardly extending rib carried by said lower reflector below the upper end thereof, a cylindrical support fixed to said annular flange, a pair of light bulb sockets in said lower reflector, means xed to said support for supporting said sockets in horizontal position in said lower reflector, an intermediate downwardly directed reflector fixed to said cylindrical support, an inverted substantially frusto-conical screen seated at its lower end withinsaid lower reflector and on said rib, means securing the upper end of said screen to said intermediate reflector, an upper downwardly directed reflector, means supporting said upper reflector in spaced relation above said intermediate reflector, said upper reflector including an outer annular ring formed with a lower reflecting surface, an inwardly ofiset flange carried by said ring, an inner cap engaging on said flange and formed with a lower concave reflecting surface, and means detachably securing said cap on said offset flange.

2. A street lamp comprising a hollow standard, a sleeve detachably mounted about the upper end of said standard, an outwardly extending flange carried by the upper end of said sleeve, a cylindrical flange extending upwardly of said first flange and having a diameter greater than the diameter of said sleeve, a cap on the upper end of said standard, cap retaining rods in said standard and fixed at their upper ends to said cap, an annular upstanding flange carried by said cap, an upwardly directedlower reflector, means securing said lower reflector to said cylindrical flange, an inwardly extending rib carried by said lower reflector below the upper end thereof, a cylindrical support fixed to said annular flange, a pair of light bulb sockets in said lower reflector, means fixed to said support for supporting said sockets in said lower reflector, an intermediate downwardly directed reflector fixed to said cylindrical support, an inverted substantially frusto-conical screen seated at its lower end within said lower reflector and on said rib, means securing the upper end of said screen to said intermediate reflector, an upper downwardly directed reflector, means supporting said upper reflector in spaced relation above said intermediate reflector, said upper reflector including an outer annular ring formed with a lower reflecting surface, an inwardly offset flange carried by said ring, an inner cap engaging on said flange and formed with a lower concave reflecting surface, and means detachably securing said cap on said offset flange.

3. A street lamp comprising a hollow standard, a sleeve detachably mounted about the upper end of said standard, an outwardly extending flange carried by the upper end of said sleeve, a cylindrical flange extending upwardly of said first flange and having a diameter greater than the diameter of said sleeve, a cap on the upper end of said standard, cap retaining rods in said standard and fixed at their upper ends to said cap, an annular upstanding flange carried by said capan upwardly directed lower reflector, means securing said lower reflector to said cylindrical flange, an inwardly extending rib carried by said lower reflector below the upper end thereof, a cylindrical support fixed to said annular flange, a pair of light bulb sockets in said lower reflector, means for supporting said sockets in said lower reflector, an intermediate downwardly directed reflector fixed to said cylindrical support, an inverted substantially frusto-conical screen seated at its lower end Within said lower reflector and on said rib, means securing the upper end of said screen to said intermediate reflector, an upper downwardly directed reflector, means supporting said upper reflector in spaced relation above said intermediate reector, said upper reflector including an outer annular ring formed with` a lower reflecting surface, an inwardly offset flange carried by said ring, an inner cap engaging on said flange and formed with a lower concave reflecting surface, and means detachably securing said cap on said offset flange.

4. A street lamp comprising a hollow standard, a sleeve detachably mounted about the upper end of said standard, an outwardly extending flange carried by the upper end of said sleeve, a cylindrical flange extending upwardly of said first flange and having a diameter greater than the diameter of said sleeve, a cap on the upper end of said standard, cap retaining rods in said standard and fixed at their upper ends to said cap, an annular upstanding flange carried by said cap, an upwardly directed lower reflector, means securing said lower reflector to said cylindrical flange, an inwardly extending rib carried by said lower reflector below the upper end thereof, a cylindrical support xed to said annular flange, a pair of light bulb sockets in said lower reflector, means for supporting said sockets in said lower reflector, an intermediate downwardly directed reflector fixed to rsaid cylindrical support, an inverted light transmitting member seated at its lower end within said lower reflector and on said rib, means securing the upper end of said light transmitting member to said intermediate reflector, an upper downwardly directed reflector, means supporting said upper reflector in spaced relation above said intermediate reflector, said upper reflector including an outer annular ring formed with a lower reflecting surface, an inwardly offset flange carried by said ring, an inner cap engaging on said flange and formed with a lower concave reflecting surface, and means detachably securing said cap on said offset flange.

5. In a street lamp, a horizontally disposed open top annular reflector of cup-like form, an upstanding support therefor, an annular vertically disposed supporting member fixed to said support extending through the bottom of and into and disposed coaxially with said reflector, said mem-- ber having its outer surface possessing a reflecting characteristic, an intermediate reflector having a vertically disposed hollow flared portion secured to said member and a depending curved outer portion encompassing in spaced relation the upper portion of said lower reflector, said intermediate reilector having its inner and outer faces possessing reflecting characteristics, an upper reflector formed of a ring-like outer section arranged over the inner part of the outer portion of the intermediate reflector and an inverted cupshaped inner section detachably connected to said outer section and arranged over the inner portion and the inner'part of the outer portion of the intermediate reflector, illuminating means in said lower reflector and common to the latter and to said intermediate reflector, and said inember, and illuminating means arranged within the inner portion of the intermediate reflector, extended into the outer section of the upper reflector and arranged above said member.

5. In a street lamp, a horizontally disposed open top annular reflector of cup-like form, an upstanding support therefor, an annular vertically disposed supporting member xed to said support extending through the bottom of and into and disposed coaxially with said reflector, said member having its outer surface possessing a reflecting characteristic, an intermediate reflector having a vertically disposed hollow flared portion secured to said member and a depending curved outer portion encompassing in spaced relation the upper portion of said lower reflector, said intermediate reflector having its inner and outer faces possessing reflecting characteristics, an upper reflector formed of a ring-like outer section arranged over the inner part of the outer portion of the intermediate reflector and an inverted cup-shaped inner section detachably connected to said outer section and arranged over the inner portion andthe inner part of the outer portion of the intermediate reflector, illuminating means in said lower reflector and common to the latter and to said intermediate reflector and said mem-ber, illuminating means arranged within the inner portion of the intermediate reflector, extended into the outer section of the upper reflector and arranged above said member, supporting means interposed between the lower reflector and the outer portion of the intermediate reflectors and including an upstanding screen means, and supporting means interposed between the outer portion of said intermediate reflector and the outer section of the upper reflector and including an upstanding screen means.

7. In a street lamp, a horizontally disposed open top annular reflector of cup-like form, an upstanding support therefor, an annular vertically disposed supporting member fixed to said support extending through the bottom of and into and disposed coaxially with said reflector, said member having its cuter surface possessing a reflecting characteristic, an intermediate reflector having a vertically disposed hollow flared portion secured to said member and a depending curved outer portion encompassing in spaced relation the upper portion of said lower reflector, said intermediate reflector having its inner and outer faces possessing reflecting characteristics, an upper reflector formed of a ring-like outer section arranged over the inner part of the outer portion of the intermediate reflector and an inverted cup-shaped inner section detachably connected to said outer section and arranged over the inner portion and the inner part of the outer portion of the intermediate reflector, substantially horizontally disposed oppositely extending lower illuminating means completely housed in said lower reflector common to the latter and to the said intermediate reflector and said member, upper illuminating means within the inner portion of the intermediate reflector, extended into the outer section of the upper reilector and arranged above said member, and means extending from said upstanding support through said member for supporting said upper illuminating means.

HILYARD R. ROBINSON. AKSEL J. C. KNUDSTRUP.

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