Push-Button CONCRETE MIXER (Aug, 1950)
I love the label that simply says “Brains”. At first I thought that was an ingredient.
Push-Button CONCRETE MIXER
THREE men can prepare over a thousand yards of concrete a day in a towering push-button mixer near Phoenix, Ariz. The big tower has six bins which are filled by conveyor belt from stock piles of material. Orders for concrete are sent to the control room by pneumatic tube. Depending upon the order, the operator selects a disk and places it on a turntable. As the disk revolves, buttons make electrical contact to release material into the mixers. Three minutes after a driver sends up his order, the concrete is dumped into his truck.