Patent GB-227657-A (GB)
Title: Improvements relating to water gates and the like with driftage escapes
IPC: E02B7/36
Filed: 1924-02-25
Abstract: 227,657. Dunlop, S., (Berliner Akt.-Ges. f³r Eisengiesserei und Maschinenfabrikation, formerly Freund & Co., J. G.). Feb. 25, 1924. Sluice gates.-In vertically sliding sluice gates which hare provided with hinged heads for allowing floating logs, ice, &c. to escape over the gate, driving pulleys are provided to actuate draught members connected to the gate and to the escape in such a manner that by hauling said draught members or paying them out in one and the same sense around the pulleys the gate and the escape may be moved simultaneously or the escape singly. In the form shown in Fig. 1 the hinged driftage escape 1 wipes laterally against sheetmetal faces 2 fixed to the gate 3. Motion is imparted to the gate and to the hinged' head by means of the shaft 5 of the driving mechanism, a sprocket 6 being provided for the gate chain 8 and another sprocket 9 for the chain 10 actuating the head 1. When the gate is lowered and rests on the bottom, continued motion of the driving mechanism lowers the head as the chain 10 is paid out. On raising, the chain 8 will be tightened before the head is completely raised, so that the chain 10 is prevented from taking the weight of the gate. The sprocket 9 may be made smaller than the sprocket 6 so that the head falls as the gate is raised. A locking lever 30 actuated by a rod 31 and engaging with a hook 34 on the head 1 may be provided to hold the latter in raised position and relieve the stress in the chain 10. In the form shown in elevation in Fig. 6, the hinged head 1 wipes against a flat plate 4 fixed to the side wall. The gate and head are actuated by chains as before and the sprocket 9 for the head chain 10 is loose on the shaft 5 but may be clutched thereto by a clutch 29 so as to enable the head to be moved independently ot the position of the head. In either of the forms described the chains may be replactd by other mechanism, for example, toothed racks. A change-speed gear may be used to drive the main shaft at a higher speed when operating the head alone. Fig. 10 shows a form in which a two-rope draught member 13 is used to lift the gate and to actuate the hinged head 1. The chain 13 passes over a fixed pulley 14, round a pulley 21 on the gate, and over a second fixed pulley 15. When the driving pulleys 14, 15 are turned in opposite senses the gate is raised or lowered without shifting the head. The latter is actuated by turning the pulleys in the same direction, causing the pulley 21 to rotate and operate the head through a gear wheel 23 and a toothed sector 24. In a modification the draught member 13, Fig. 12, acts on a pulley 21 to which is secured a crank 26 actuating the head 1 through a connecting rod 28. The crank and connecting rod lie in a straight line in the two extreme positions of the head so that in these positions no turning moment is produced and the member 13 is relieved of stress. Fig. 14 shows locking means for the head comprising a rod 35 hinged to the head at one end 36 and connected at the other to a member 39 which slides on a rod 40 and which can be locked in various positions by means of a wheel 41, a shaft 42 and cams 43. A strut hinged to the masonry and formed with a series of steps against which the head can rest may be used for the same purpose. The head is preferably formed with an inclined top edge, as shown. in Figs. 10, 12, and 14, or curved, or arranged at an angle, so as to facilitate the escape of light driftage.