Optics: motion pictures – Removable film strip magazine type
Patent
1988-09-01
1990-08-21
Mathews, A. A.
Optics: motion pictures
Removable film strip magazine type
352 88, 52585, G03B 1506, E04B 160
Patent
active
049510762
DESCRIPTION:
BRIEF SUMMARY
This invention relates to photographic coves.
Photograhpic coves are used in photography, cinematography, television, video and other applications when an apparently featureless background with no angles or edges is required. Such coves are usually hand-built on site, as a single unit, of plaster or similar inflexible material supported by a wooden frame, and cannot economically be dismantled for re-use on new sites. Hence they are usually regarded as permanent fixtures.
Construction of such coves is both time consuming and costly, requiring great skill to achieve a uniformity that is professionally acceptable. Alterations or additions are expensive because of the nature of the materials used. Traditional photographic coves are also susceptible to damage by atmospheric conditions, such as humidity, and have a tendency to crack when subjected to intense heat from photographic or other lighting equipment. Furthermore because of their cumbersome nature they require permanent siting, and when not in use occupy extensive floor and wall space.
The object of the present invention is to provide a photographic cove which overcomes the disadvantages of the known coves.
The present invention provides a photographic cove comprising a plurality of stackable pre-fabricated modular units each of which has a front surface, the front surface of at least one unit being concave, the units being securable one to another so that the front surfaces thereof combine to form a smooth at least partially concave surface, wherein the units have rearwardly extending peripheral flanges providing mating side surfaces, means extend into or through at least some of said flanges to releasably secure the units one to another and means are provided secured to said flanges for supporting the assembled units.
The invention allows an assembled cove to be disassembled for ease of transportation to another site. When not in use, the disassembled cove units may be stacked out of the way in the studio or stored elsewhere, so as to make economic use of floor space. A cove embodying the invention is relatively easy for a non-expert to assemble and dismantle.
The units are of strong and lightweight self-supporting structure, and may suitably be made e.g., moulded, from glass fibre reinforced plastics, blow-moulded plastics, or other lightweight material.
Preferred embodiments of the invention will be described with reference to the accompanying drawings in which:
FIG. 1 is a perspective view of one embodiment of a photographic cove embodying the invention;
FIG. 2 is an exploded view of the cove of FIG. 1;
FIG. 3 is a perspective view of two base units and one middle unit of a photographic cove showing one method of securing the units;
FIG. 4 is a perspective view of two base units of a photographic cove showing another method of securing the units;
FIG. 5 is a fragmentary rear prespective view of another embodiment of a photographic cove according to the invention; and
FIG. 6 is a prespective view of a further embodiment of a photographic cove according to the invention.
Referring to FIGS. 1 and 2, the photographic cove is assembled from a plurality of prefabricated modular units 1 of predetermined width and height, each unit having a front surface 2 and side surfaces 3 which abut in the assembled cove. The front surfaces 2a of some of the units 1 are concave and the front surfaces 2b of others of the units 1 are planar. The front surfaces 2 of the units 1 combine to provide a smooth at least partially concave surface 4 as shown in FIG. 1.
The base units 1a have a bottom wall 5 which acts as a support for supporting the assembled cove.
For lightness and ease of construction the side surfaces 3 are provided by rearwardly extending peripheral flanges 6 so that from the rear each unit 1 is of an open box-like construction.
As shown in FIGS. 3 and 4 the units 1 may be connected together by means of pegs or dowels 7 which engage in apertures or recesses 8 in the side surfaces 3. Pegs or dowels 7 may be either integral with the units 1 as shown in FIG. 3 or
REFERENCES:
patent: 4067165 (1978-01-01), Timmons
patent: 4144556 (1979-03-01), Bond
patent: 4183185 (1980-01-01), Farge
patent: 4292662 (1981-09-01), Gasperini
patent: 4318589 (1982-03-01), Brown et al.
patent: 4750807 (1988-06-01), Felix
Baillie-Hamilton William J.
Brown Ronald J.
J R Group PLC
Mathews A. A.
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