US1624237A - Street-lighting equipment - Google Patents

Description

April 12, 1927. 1,624,237

D. B. HANNA STREET LIGHTING EQUIPMENT Filed June 10. 1925 I J/wenZOr .Dazrici ,B amuL Patented Apr. 12, 1927.

DAVID '13. HANNA, or PARK RIDGE, ILLINOIS.

STREET-LIGHTING EQUIPMENT.

Application filed June 10, 1925. Serial No. 36,176.

My invention relates to outdoor illumination, and more specifically to the illumination of streets and roadways.

In the concrete installations of the prior art, a lamp post or the like is installed at a given point and nearby it is positioned a box or container, usually of metal, to which the main power leads are extended, and from which individual conductors for supplying current to the lamp extend. This box frequently contains an electrical transformer or transmitter, although in. certain systems it is a mere connection box. The use of such a box necessitates two installations; and a box adequate to protect its contents from the weather and from such pedestrian and other trafiic as it may be exposed to. is an expensive item. The wires from the box to the lamp itself must be protected and have suitable fittings both where they leave the box and where they enter the post.

In installations employing metal posts a small door is provided in the bottom of the post and the transmitter simply sets inside. In such an installation, when a vehicle accidentally smashes the post, the transmitter is likely to be wrecked also.

Among the objects and advantages of the present invention may be enumerated:

First, to protect the transmitter more elfectively than in either of the prior artinstallations.

Second, to provide a practical construction materially cheaper to manufacture and in stall than either of those at present in use.

Third,- to provide such a construction that will be more satisfactory in service.

Fourth, to provide such a construction that will be more convenient for repair purposes.

Further objects and advantages of my invention will become apparent as the description proceeds.

In the accompanying drawings:

Figure l is aside elevation of astreet lami) according to the invention.

Figure 2- is a central vertical section through the lower portion of the lam post and its foundation.

Figure 5 is a bottom view of the post, looking from line of Figure 2 in the direction of the arrows.

In the embodiment of the invention selected for illustration, I have illustrated a concrete post comprising a. shaft surmounted by a capital 12 supporting the lighting unit 14, and a pedestal 16' mounted on the base 18. i

A central tube 20 provides an axial bore up the post from the dome 22 of the spider 24:. through which comluctors 26 carry current to the lighting unit. The concrete 28 may be reinforced by a series of rods 30 in addition to the central tube 20, if so desired.

The foundatimi 32 has been illustrated as a concrete block with its surface at 34 substantially flush with the adjacent terrain 36. A recess 38 is formed in the upper surface of block 32 registering with the dome 22 of the spider. One or more passage-ways 40 lead from the bottom of the recess 33 diagonally downward and outward, preferably terminating at such a level that the conduit 42 through which the power mains are carried from one post to the next, may open directly into the passageovzrvs without change of level.

lVithin the recess 38, suitable transmitting means 4% is positioned. This transmitting means may or may not comprise an electrical unit capable of changing the voltage or ampeiage, or both, of the current in the power mains 4-6. In some instances it will be a mere electri *al connection. It is preferably set on small pedestals 4S space-d slightly from the bottom of the recess. This arrangement, combined with the downward slant of the passage-ways 40 is of material advantage in case moisture should reach the recess.

The spider 24 is provided with a plurality of lugs 50, in this instance three, extending beyond the contour of the base 18 and having slotted holes 52 to receive suitable hold-down means 54 illustrated as bolts embedded in the concrete of the foundation. The bolts preferably have detachable nuts 56 at their upper ends, and the whole assembly during ordinary service periods is preferably capped over with grouting at 58, which also seals the joint between the post and its support.

lVhere an iron post is employed the recess materially protects the transmitter, and the door may be omitted, if desired, thus saving expense and securing a stronger post.

As compared with previous concrete installations, the extra box is completely eliminated but the t-ransn'iitter is better protected than before. To get access to con ductors 2G and L6 and the transmitter, the grouting can be easily knocked away, two

of the hold-dmvns disconnected, and the post tipped'a little and swung around the remaining hold-down as a vertical pivot to uncover the recess. Suitable coils in the conductors 26 will readily permit such movement.

\Vithout further elaboration, the foregoing will so fully explain the gist of my invention, that others may, by applying current knowledge readily adapt the same for use under various conditions of service, without eliminating certain features which may properly be said to constitute the essential items of novelty involved, which items are intended to be defined and secured to me by the following claims:

I claim:

1. A street lamp comprising a foundation and a post mounted thereon, said post comprising a base and a superstructure, said base having a spider with a central dome, said post having a bore extending up :trom the top of said dome, said foundation having a recess under said dome and passageways extending from said recess outward and downward to drain said recess, an underground conduit level withthe ends of said passages and communicating with them, electrical conductors in. the bore of said post, transmitting means in said recess establishingoperative electrical connection between said conduit and post conductors, said spider being of metal. and having a plurality of peripherally-spaced lugs extending out beyond said base, hold-down means fastening said lugs to said foundation, and grouting covering said lugs and holdwlown means, said hold-down means being detachably connected with said lugs, and said post conductors having coiled extensible portions in said dome.

2. A street lamp comprising a foundation and a post mounted thereon, said post comprising a base and a superstructure, said base having a spider with a central dome, said post having a bore extending up from the top of said dome, said foundation having a. recess under said dome, electrical conductors leading into said recess, electrical. conductors in the bore of said post,

transmitting means in said recess establishing operative electrical connection between said recess conductors and post conductors, said spider having a plurality of peripherally spaced lugs extending out beyond said base, and hold-down means fastening said lugs to said foundation, said hold-down means being detachably connected with said lugs.

3. A street lamp co ,iprising a founda tion and a concrete post mounted thereon, said post comprising a base and a supen structure, said base having a spider, said base and foundation defining an enclosed chamber, said post having a bore extending up from said chamber, electrical conductors leadings into said chamber, electrical conductors in the bore of said post, and transmitting means in said chamber establishing operative electrical connection between said chamber conductors and post conductors, said spider having a plurality of peripherally spaced lugs extending out beyond said base, and hold-down means detachably fastening said lugs to said foundation, said. base and foundation abutting on a plane flush with the sm'rounding terrain.

4t. A street lamp comprising a toundation and a concrete post mounted thereon, said post comprising a base and a superstructure, said base having a spider, said base and foundation defining an enclosed chamber, said post having a bore extending up from said chamber, electrical conductors leading into said chamber, electrical conductors in the bore of said post, transmitting means in said chamber establishing operative electrical connection between said chamber conductors and post conductors, said spider having a plurality of peripherally spaced lugs extending out beyond said base, and holddown means detachably fastening said lugs to said foundation, said base and foundation abutting on a plane flush with the surrounding terrain, the conductors extending past the plane of said spider having coiled. extensible port-ions in said chamber.

In witness whereof, I hereunto subscribe my name this lth day of June, 1925.

D AVID B. HANNA.

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