| 摘要 |
1,142,435. Programme control. LA TELEMECANIQUE ELECTRIQUE. Jan.20, 1967 [Jan.24, 1966], No.3212/67. Heading G3N. [Also in Division H1] An electric control apparatus, with variable programmes for analogue values, comprises a group of elastically mounted circular potentiometers, each having a conductible flexible disc in front of a winding, a removable programme card, selectable from a rack, provided with push-rod sliders each adapted to deflect the corresponding flexible disc into connection with the winding at a position representative of an analogue programmed value. As shown, potentiometer bodies, such as 11A, 11E, are resiliently mounted on a plate 9 by springs 12A, 12E and studs 32A, 32E passing through holes in the plate. The potentiometers are prevented from rotating by being joined in pairs by a flexible strip. Connection is made to a resistance winding of a potentiometer by the localized depression of a flexible conductive disc 40A, 40E by a pressure finger forming part of a circular slider 22A, 22E mounted on a programmed card 18. Each slider is retained by a spring 28A, 28E and is notched, Fig. 8 (not shown), so that it can be fixed in a desired position by the notches engaging with three teeth on the card 18. The plastic programme cards are interchangeably mounted on a cover 3 hinged to a core 1 to which is secured the plate 9. The potentiometers are stated to control the speed of direct-current motors driving screw devices feeding constituents of a concrete mix to a conveyer; the proportions of the mix depending on the mutual relationships of the motor speeds. |
