US1878799A - Metal lamp post - Google Patents

Description

Sept. 20, 193 J. NE PAGE METAL LAMP POST Filed Aug. 20. 1928 INVENTOR 12 5 AOREY 45 to the firmly anchored base" members.

A further object is to provide. stiffening Patented Sept. 20, 1932 urrsn stares PATENT Jusrrus E. NE PAGE, or SEATTLE, wasnrneron. issrenon TO NE PAGE MCKENNY (70., F SEATTLE, WASHINGTON, A CORPORATION OF WASHINGTON METAL LAMP LPOS T Application filed. Au ustao, 1928. Serial no. sow/53.

above, the concrete foundation to serve as means for fastening the base of the post to the foundation. These foundation bolts must be carefully located, by means of forms OI templates, and accurately 'trued with the work in order to assure the correct positioning of the post after the, concrete has set;

In some instances the post is erected on the concretefoundation as a single unit; in

- others it is erected complete except for the brackets used tov support the light units; and

in still other instances the post is delivered to the point of erection in sections where the several parts are assembled during the process of erection. The third method is obviously advantageous to the manufacturer and often to the contractor as well, especially where the post is of considerable length.

Various methods have been employed to fasten together the principal parts of asectionalized post as it is erected, but heretofore the methods used have been more or less complicated, and the Work exacting and tedious. Whensuch posts are finally erected they lack in rigidity and ability to resist impact from vehicular collisions largely because of the fastening methods employed.

The chief object of my invention is to pro vide improved means of removably anchoring the base members of sectionalized lamp posts to the concrete foundations'used to support them. 7 j I Another object; is to provide an improved means of securingv the shaft and capital, or bracket, sections ofsectionalized lamp posts means coacting with the fastening elements of sectionalized lamp'posts', whereby the shafts of said posts are strengthened against failure at their critical sec'tions.

drawn to alarger scale.

An additional object of the invention is to provide means for usinguthese improved tubular fastening elements of sectionalized lamp posts as conduits for the electric conductors required to supplyf'current to the electric lamps. i i

e Other objects of the invention will be apparent from the following detailed description of a preferred form of the invention' which is clearly illustrated in the accompanying drawing, in which igure 1 is an elevation of a lamp post 'embodyingthe invention.

Fig. 2 is a sectional elevationof the device Figsh3, i and 5 are sectional views taken at A A,B.B, and C-C respectively.

Fig. 6 is a detached plan view of the column-section stiffening plate. Fig.7 is a bottom View of the anchor flange. '1

Like reference numeralsare' used to indicate like parts throughout the drawing, in

which 9 is'an' ornamental lamp post' having a base section 10 which is preferably, a metal casting. e r The upper end projection 11 of basec'astng 10 isso, shaped as to fit snugly into the mterior space section of the bot'tom, of tubu larmetal shaft 12, the upper end of which fits-over a similar projection 13 at the bottom of top oastingld. This in turn supports the glass'lamp-canopy 15 inthe usual way.

In erecting a lamp post embodying the iny vention, an excavation is first made where the post is to set and a concrete foundation 161s then poured in the customary manner except that a suitable-lengthof threaded pipe 17 having ananchoring flangeJlS screwed or otherwise secured to its lower end, 1s 1mbe'dded1nthe concrete with its center linecoinciding with thecenter linethe lamp post is to have when erected,.and withits upper threaded end .19 projecting above the top of the foundation. A simple template or othermeans may be employed to, assure theproperIpositioningof pipe section 17 and attached flange18. I i j I 'After the concrete hasset,1a T 19 andsuit: able length of threadedpipe 20 are screwed following which the base casting is positioned on the foundation with the upper end of pipe 20 protruding the. properdistance through opening 21 of the base casting to provide for a spring washer 22 and a nut' 23 which coact with flange 18, pipe sections 17 and 20, and T 19 to removably yet securely anchor base casting 10 to foundation 16, and-resist lateral displacement, particu larly in case of vehicular collisions."

length of threaded pipe 25 is added, which carries at its upper end stiffening plate 26, held in position by meansof nut 28 and coupling 29. Stiffening plate 26 is so fashioned andsized as to be a'snug. fit in the portion 30 of tubular shaft 12 when 1t is assembled onto base casting 10 as shown clearly in Figs. 1, 2 and 6; f f

The threaded pipe section 31 is made'of sufficient length so it will project above the bottom 32 of top 1 1 when screwed into coupling 29. The tubular shaft 12 and top casting 14 are then securelyfastened tofoundation 16 and to base 'ca'stinglO by means of spring washer 33 and nut 34:.

T 19 is preferably of special construction so as to provide a branch opening 35 made readily accessible by opening door 36 Wh10l1 is secured in position in base 10by means of suitable screws 37. An insulating cover 38 may be used to close branch open1ngi35, screws 39 being used to secure it in pos t on as shown in' the drawings. Holes 40'are provided in insulating cover 38 to support the protruding ends of wires 41 used to connect the lamp socket, not shown, atQthe' top of the post withthe' transformer or other electrical equipment, notishown,shoused within base'lO. .7

A After assembling the several' 'selct ons of the lamp post, as previously described, and with door 36 and'cover 38 removed, w1res ll are drawn into position within the tubular fasteningsections 17,- 20, 25 and 31, after which they are anchored. and connected t v the lamp socket in the usual way,"

Cover 38 may nextbelsecured in position and thelower ends of wires 41 connected as provided for within base .10, after which screws 37.

'- The; interior of base: 10. ise fi ejctively. drained by meansjof a "hole 42%provided :for-

l that: purpose in foundation 16-andcurb 43.

It will be notedfthat -the top "of the foundation is below 'the' level' of thesloping'side walkr ll, thus assuringa neat and workmanl ike' jointbetween the lampfpost base; and sidewalk surface; and'anchoring'the skirtof the base against lateral displacement. The

7 installation is completed byadding thelamp,"

' be closed. and fastened by.

not shown, and the desired glass lamp-canopy 15. V

It will be noted that the central tubular tion 16 independent of the; other sections.

Obviously the stressesinduced in the central A coupling 24 is next screwed onto the projecting end of pipe section 20 and a third;

tubular element in case of a collision with the base are transmitted directly to the top of the base and thence to the foundation.

element 45 may be accentuated by increasing the size and thickness of the pipe sections employed. ln the drawing the sections of fastening element 45 are niadeof smaller size towardithe top, advantage beingtaken of the several couplings to do this effectively thus reducing the cost'of the structure without sacrificing the stiffening effect of the larger lower pipe sections 17 and 20, of high bending strength where they are most help-.

ful'in resisting lateral displacement of the stop of base 10.

It isthepurposeof stiffening plate 28 to reduce 'the' distortion of tubular shaft 12 when subjectedto excessive strains, by preventing the collapse of the walls of the shaft,

thus 'maintaining the effectiveness of the metal in the tubular shaftsection with re spect to the neutral axis. Best results are obtained when this plate is located at that height in the tubular shaft where the collapse of the shaft walls may be generally expected to occur. Where long shafts are to be used two or-more'stilfening plates, properly spaced,'may be employed. V

.Any difference in the expansion of tubular fastening element 45 and lamp post sections 10, 12 andl l'due to changes in, temperature 2 and to the use of dissimilar materials, is provided for by theuse of spring washers 22 and '33.. These havesufficient strength "and range ofelongation to provide-at all times the minimum stress'required to keep the sevs,

erallamp post sections properly assembled,

'and'yet keep the stresses, underfconditions of maximum temperature change, within permissible'limits; This is an lmportant feature of the invention as it makes possible the use of standard steel pipe sections in fastening element 45 in combination with bronze lamp post sections 10, 12 and 14, or any other combination of materials found necessary to meet the varying conditions in practice.

My invention is not necessarily limited to the details of construction as shown and described in this specification, for it is obviously possible to make many changes in the design and construction of the several sections of the lamp post, and to modify the size and method of securing the central tubu lar fastening member sections in order to adapt the invention to posts and poles of various lengths and design, for'instance base 10 may be made in several sections instead of a single casting. Also the tubular shaft may be made in several different thicknesses or may be made up of a plurality of nested tubu lar sections so as to provide the necessary strength.

Having thus described my invention What I claim and desire to have protected by Letters Patent is:

1. In a sectionalized metal lighting standard, adapted to resist lateral displacement, a

base section having a top head With an axial aperture, a foundation for said standard, an axial tubular stifiening element of high bending strength secured in said foundation and engaging said head and protruding from said aperture and means on the protruding end of said element for tensioning the same i to removably anchor said base to said foundation.

2. In a sectionalized metal lighting standard adapted to resist lateral displacement, a unit base section having a top head With an axial aperture and an expanding skirt imbedded in concrete, an axial tubular stiffening element of high bending strength secured in a foundation for said standard, engaging said head and protruding from said aperture, and means on the protruding end of said element for tensioning the same to removably anchor said base to said foundation.

3. In a sectional metal lighting standard, means for anchoring the base section of the same to a supporting foundation and strengthening the same to resist horizontal impact forces, comprising the combination of imbedding the skirt end of said base section in a layer of concrete above said foundation, a top head in said base section, an axial aperture in said head, a central tubular stiffeningelement of high bending strength imbedded in said foundation, engaging said head and protruding from said aperture, and means on the protruding end of said stiifening element for tensioning the same to removably anchor said base to said foundation.

4. In a sectionalized metal lighting standof high bending strength secured in said foundation, engaging said head and protruding from said aperture, means on the protruding end of said elementfor tensioning the same to removably anchor said base to said foundation, a unit tubular shaft mounted on said base, a top mountedon said shaft,

an axial tubular fastening element in end connection with said stiffening element, and means at the upper end of said fastening element of tensionlng said axial elements in said foundation to secure saidshaft and cap to protruding end of said element for tension- 7 ing the same to removably anchor said base to said foundation, a unit tubular shaft mounted on said base, a top mounted on said shaft, an axial tubular fastening element of reduced diameter in end connection with said stiffening element, a stiffening plate on said fastening element at substantially the critical section of said shaft and means at the upper end of said fastening element of tensioning said axial elementsin said. foundation to secure said shaft and cap to said base.

The foregoing specification signed at Seattle, Washington, this 11th day of Aug.

' JUSTUS F. NE PAGE.

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