Patent GB-815994-A (GB)
Title: Improvements in or relating to portable supporting structures for radio or television receivers
IPC: A47B37/00
Filed: 1956-04-18
Abstract: 815,994. Aerials; radio receiving apparatus. FARRANT, R. D. July 17, 1957 [April 18, 1956], No. 11828/56. Classes 40 (5) and 40 (7). [Also in Group XIV] The aerial for a radio or television receiver is incorporated in, or forms a structural part of, the means by which the receiver is raised to a convenient height above ground level. In one series of embodiments the means for raising the receiver is a table and the aerial elements either comprise the legs of the table, are incorporated in the legs of the table, or are secured beneath the table top. Fig. 1 shows an embodiment of this kind with metal legs 3, 4 shaped as shown to form one element of an aerial. The other mirror image element at the other end of the table top 8 is not shown. The leg units are attached to the table top by bolts 7a, 7b, 7c and 7d and the bolts 7c and 7d of each element provide alternative tapping points for a balanced input to the receiver. Adjustment of the lengths of the elements is possible by means of sleeves 31 and castors 11 may be fitted. In a modification (Fig. 2, not shown) the feeder is connected to contact sleeves adjustable along the parts 10 of the aerial elements and not to the securing bolts. Fig. 3 shows a variation of the aerial element shown in Fig. 1, wherein the length of the vertical sections 3<SP>1</SP> and 4<SP>1</SP> is adjustable by means of sleeves 12, 13 having a range of holes 14 and pins 15 cooperating with corresponding holes in the ends of the vertical section rods or tubes. So that the table top can be maintained at a desired height despite adjustment of the element length, legs 16 are provided adjustable in similar manner in sleeves 14a attached to the lower part of the aerial element by insulators 15a. It is also possible to provide the table with " hairpin " legs forming an aerial system. Such legs may either be joined to form two complimentary aerial elements or separated to form aerial elements and parasitic elements (Figs. 4 and 5, both not shown). Fig. 6 shows a wooden table top 23 supported by a wooden leg structure. Wire 25 is fitted into recesses extending along the leg members and forms aerial elements which are connected respectively to securing bolts 7c<SP>11</SP>, 7d<SP>11</SP> from which a feeder may be taken to the receiver. A wooden table with the usual vertical wooden legs may have one or more legs bored lengthwise from the top end to house a telescopic aerial element capable of extension an adjustable amount above the table top. Where more than one leg is so arranged alternative aerials, an aerial array, or an aerial with one or more parasitic elements may be provided (Fig. 7, not shown). Aerial elements may also be fitted to the underside of a table top and secured thereto by bolts forming terminals. Depending side walls on the table top may be fitted to prevent the aerial being visible (Fig. 8, not shown). Where the aerial system is directive so that the table has to be orientated in a given direction to receive a desired signal a turntable may be provided in or on the table top so that the receiver can readily be turned to the most convenient position. It is not necessary for the receiver support to be a complete table and in certain of the embodiments described the flat top part of the table may be dispensed with and the receiver mounted directly on the legs or leg structure. Suitable legs or leg structures may also be incorporated into the cabinet work of a console-type receiver.