| 摘要 |
1,217,079. Camera supports. RONFORD Ltd. June 19, 1969 [July 22, 1968], No.34849/68. Heading G2J. [Also in Divisions E2 and F4]. In a camera support, in which the degree of rotational "feel" is adjustable, a rotor assembly 5 is mounted within the housing 4 formed by a body part 1 and a detachable plate 3, the rotor 6 being free to rotate about the axis 5x in the bearings 10, 12 provided in the body part 1 and plate 3. The rotor has a plurality of chambers 19 to 22 formed by its walls, the chambers containing a viscous liquid and ring members 24 to 27 coaxial with the rotation axis and free to move in the liquid. Each ring has an associated device which may be used to clamp the ring to the housing so that there will be a viscous force to overcome during the rotation of the frame 39 which is coupled to the boss 8 of the rotor; by adjusting the number of clamped rings it is possible to adjust the "feel" as desired. The clamps shown are pairs of opposed jaws mounted with oppositely directed screw threads on threaded rods, e.g. jaws 31,32 on a rod 35 clamp the ring 24 when the knob 36 is turned, the whole arrangement being mounted on the plate 3. In an alternative arrangement, Figs.2,3 (not shown) the rings have castellated edges and lever controlled, spring-loaded, sliding blocks with peg shaped abutments mate with the castellations to clamp the rings. In both cases the walls of the rotor and the rings have apertures 23, 28 to allow the viscous liquid to circulate and it is believed that tapered shape of the housing produces a pumping effect as the rotor rotates. The drawing also shows how a similar adjustable feel effect may be achieved about an axis 5xa which is perpendicular to that of 5x. The arrangement is very similar to that described except that now the "rotor" 6a is fixed to the frame 39, but instead the housing rotates as the camera platform 41 swivels about 5xa, a bearing 43 giving the strut 42 the necessary rotational freedom at the other end of the platform. The whole arrangement may be coupled to an auxiliary stand through the lugs 1<SP>1</SP>. |
