Signals and indicators – Street traffic – Portable
Patent
1979-08-22
1981-03-17
Goldberg, Gerald
Signals and indicators
Street traffic
Portable
116 63P, 40610, E01F 901
Patent
active
042560500
ABSTRACT:
A collapsible conical element, particularly in the form of a collapsible road marker cone, comprises a base which is preferably relatively heavy, and a coiled strip, preferably of a resilient plastics material, the outer turn of the strip being restrained from pulling away from the base on extension of the coiled strip to form a cone and the strip having at least two projections, one on each face thereof disposed longitudinally and with the projection on the radially outward face being below the projection on the radially inward face when the cone is in the upright position base down. The base is preferably a substantially planar member, e.g. thick rubber sheeting, with a substantially circular aperture within which the outermost turn of the strip is retained, either by virtue only of the resilience of the coiled strip or with additional fixing. It is convenient to have the radially outward projection at the bottom of the strip and to provide a recess around the aperture in the base under which this projection may be trapped. For extending the strip to form a cone a handle may be provided which is insertable within the innermost turn of the coiled strip and which has a flange which will engage the bottom edge of this turn when the handle is pulled upwards. The strip, for road marker use, may bear designs on those surfaces thereof which are exposed when it is extended to form a cone.
REFERENCES:
patent: 2819547 (1958-01-01), Clements
patent: 2954005 (1960-09-01), Cioffi
patent: 4006702 (1977-02-01), St. Cyr
patent: 4197807 (1980-04-01), Campbell
Corr Denis E.
Goldberg Gerald
National Research Development Corporation
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