Static structures (e.g. – buildings) – Including component designed to receive a disparate article... – On shaft or tower
Patent
1985-06-20
1986-10-21
Bell, J. Karl
Static structures (e.g., buildings)
Including component designed to receive a disparate article...
On shaft or tower
52292, 52726, 248159, 362431, E04H 1208
Patent
active
046177680
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION(S)
This United States application stems from PCT International Application No. PCT/SE83/00376 filed Nov. 1, 1983.
BACKGROUND OF THE INVENTION
The present invention relates to a poleshaped supporting member, and a base structure for attachment of same, said supporting member preferably being arranged to support street light assemblies, illuminated road signs or other electrical equipment.
Previously known types of poleshaped supporting members can basically be divided into three categories, namely solid members, tubular members and members having a framework construction. With regard to both solid members and members having a framework construction, a separate and external connection box must be used to accomplish electrical connection to an electric feed cable extending below the ground level, and said connection box also includes associated electrical fuses. Furthermore, the cable joining the connection box and the electrical equipment suspended by the member is substantially totally unprotected. In order to receive protection for the last mentioned cable, and in order to avoid use of externally located connection boxes, tubular supporting members have previously been used, having an aperture located adjacent to the ground level, arranged with a detachably mounted lid. Terminal block and fuse holders can thus be arranged covered by said lid. In view of the fact that the aperture located adjacent to the ground level considerably reduces the physical properties of the tubular supporting member, a relatively large wall thickness has been required, resulting in large weight and high manufacturing cost for the member, and the members also cause considerable damage in collisions with vehicles. Certain proposed "collision friendly" members are previously known, e.g. having fractural impressions added during manufacture, intended to make the member break if same is involved in a collision with a vehicle. Also this last mentioned type is expensive to manufacture, and installation costs are also high.
SUMMARY OF THE INVENTION
The object of the present invention is to disclose a poleshaped supporting member, which completely meets the requirements fulfilled by the above discussed previously known tubular supporting members, but which also prevents unauthorized manipulation with the terminal block and the fuse holders which are located surrounding by the member. The member further facilitates extremely simple and rapid installation, as well as electrical connection. Finally, extremely high requirements relating to safety against damage in a collision with a vehicle are also catered for, and after such an incident, a damaged member can be replaced by a new member rapidly and at a low cost.
The poleshaped supporting member according to the present invention, and the base structure for attachment of same are based on the fact that the poleshaped supporting member has a tubular cross-section, and are mainly characterised in that the poleshaped member is arranged having a conically reduced cross-section in direction from the ground plane, and that an associated base structure includes an attachment member extending in direction towards the poleshaped member having a conicity and external shape substantially corresp- ding to surrounding portion of the poleshaped member, and that at least one clamping member surrounding the poleshaped member is arranged to press the portion of the poleshaped member surrounding the attachment member into a frictional contact position against the attachment member.
BRIEF DESCRIPTION OF THE DRAWINGS
Two basic examples of embodiments according to the present invention are more fully described with reference to the accompanying drawings, in which:
FIG. 1 shows a perspective view of a first embodiment of a poleshaped supporting member and associated base structure according to the invention, located separated from each other;
FIG. 2 shows the poleshaped member and associated base structure as shown in FIG. 1 joined together, and with a detailed vie
REFERENCES:
patent: 1870770 (1932-08-01), De Witt
patent: 2016011 (1935-10-01), Kent
patent: 2945659 (1960-07-01), McDonald
patent: 3364635 (1968-01-01), Guggemos
patent: 3671738 (1972-06-01), Beachley
patent: 3974372 (1976-08-01), Cochran
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