Patent GB-857185-A (GB)
Title: Coke-oven door
IPC: C10B25/12
Filed: 1959-02-26
Abstract: 857,185. Coke oven doors. SOC. D'ETUDE & DE CONSTRUCTION EVENCE COPPEE S.A. Feb. 26, 1959 [Aug. 2, 1958], No. 6673/59. Addition to 857,184. Class 55 (1). The coke oven door of the parent Specification which comprises springs pressing the door against a frame integral with the oven, themselves bearing against bolts which rock simultaneously into an unlocking position after the springs have been removed from the same by fitments carried on the door and operated by a mechanical linkage comprising a horizontal traverse arranged in such a way as to be capable of being raised by a door-removal mechanism of the kind used for manipulating manually unlockable doors and provided with a lever capable of hooking on to a traverse on the door by pivoting about a horizontal axis, the mechanical linkage being provided at one end with a projection which causes the bolts to rock into their unlocking position after the fitments have moved the springs away from these bolts and, at the other end, a stop which encounters a member integral with the door after the bolts have been brought into their unlocking position, is modified in that the parts which move the springs away from the bolts comprise cranks actuated by the mechanical linkage in a plane perpendicular to the axis of the rod guiding the springs, and also screws with double, contrary-running threads which are set in rotation by the cranks and fitted parallel to the rod, one of the threads of each screw being movable in a nut fixed on the door whilst the other is movable in a nut rendered integral with a member which engages with lateral play in a grooving formed between two shoulders of a tube which surrounds the rod and which is interposed between the springs and bolts. As shown, door 2 is urged against frame 3 by springs 4 compressed between door 2 and shoulder 5 of a sliding tube 6 serving as a pivot for bolt 7. Nut 8 screwed on tube 6, washer 9 and shoulder 10 axially immobilize bolt 7. Bolting and unbolting of the two bolts 7 may be simultaneously effected by means of connecting bar 12 and the mechanical linkage which unite the means which bring about the sliding action of the tubes 6 on rods 13. The latter may be made integral with flanges 14 by means of bolts 15. When the door is to be unbolted springs 4 may be further compressed to permit bolts 7 to lose contact with catches 11. Two bars 24 which may form part of the mechanical linkage are able to slide in guides 25 integral with the door and are themselves connected by traverse 26. Bars 24 may rest on adjustable stops 27 and may be connected to rods 29, 30 carrying righthand threaded adjusting nuts 31. Rods 29, 30 may be connected to cranks 32, 33 integral with screws 321, 33<SP>1</SP> respectively, the latter having left- and right-hand threads on which nuts 35, 34 are fitted. The latter are integral at one end with flanges 14 fixed to the door and at the other end with flanges 36, themselves fixed on members 37 which are engaged with lateral play in grooves formed between shoulders 5, 10. Upon bars 24 being raised by arm 22 of the doorremover, the rotation of left- and right-hand threaded screws 32<SP>1</SP>, 33<SP>1</SP> in units 34, 35 causes flange 36 to be brought up towards flange 14. Bolts 7, having been propelled towards door 2 by tubes 6, are no longer in contact with catches 11, and as a result screw 42 contacts upper bolt 7 and rocks it into its unbolting position. Nuts 45 on the threaded portions of the rods 13 located in front of the tubes 6 may enable the door to be bolted and unbolted by hand by virtue of the fact that the tubes 6 transmit to stops 8 the thrust they receive from nuts 45.