GB856882A - Improvements in or relating to merry-go-rounds - Google Patents

Abstract

856,882. Merry-go-rounds. CHEREAU, A., and DE VOS, H. April 4; 1957 [April 20, 1956], No. 11022/57. Class 132(1). A- merry-go-round comprises at least one passenger carrying means pivoted to a central rotatable driven member 2 for vertical movement under the influence of pressure fluid means, braking means 5 being provided for the central member which are under a single general control also controlling the driving means. As shown the rotary annulus 2 is controlled from a relay switch 3 and a start rheostat 4 with a motor 14 and is braked by a shoe 5 displaced by a compressed air ram 6 controlled by valve 7. An arm carrying each passenger car is raised by a ram 8 operated by compressed air supplied through valve 9a to its lower end while air is forced out of the upper end through valve 9b, upper and lower ends being connectable through valve 10 when valves 9a, 9b are closed. Valves 9a, 9b and 10 are electro valves connected to one pole of the current supply and to the contacts 11b, 11c of a switch 11 whose arm 11a is connected to the other pole of the supply. A time switch 12, with a safety switch 17 in parallel therewith, is connected in the control circuit to control the time of operation. The circuit comprises the winding of relay 3, relay 13 which starts motor 14, relay 15 controlling switches 11 and relay 16 which controls valves 10 to cause partial or complete descent of the arms. These relays are preferably operated in succession. In operation, timer 12 is set to the required time and button 12a is pressed to start the system by energizing relay 16 to release the brake after which relay 3 starts motor 1 and relay 13 starts the motor 14 of rheostat 4 and then relay 15 closes the switch to supply current to arm 11a of switch 11. Alternatively some of the connections between the devices may be mechanical, e.g. the braking means may operate the valves 10 mechanically.