Patent GB-190824589-A (GB)
Title: Improvements in and relating to Revolving Doors.
Inventor: CRUYFF CORNELIS JOHANNES
Filed: 1908-11-16
Granted: 1909-06-03
Abstract: 24,589. Cruyff, C. J. Nov. 16. Doors.-Relates to revolving doors provided with folding wings and suspended from carriages running on overhead tracks. One pair b, d of wings is adapted to be unlocked from the other pair a, c, by depressing handles 29, whereupon the pair b, d is folded upon the pair a, c by the action of a spring ; the folded wings can then be moved sideways by further depressing the handle 29, which raises the door pivot clear of its bearing in the floor, and also releases the carriage carrying the door-wings. The wings a, c are rigidly secured together at the top and bottom, and carry a band secured to a tube 3 suspended by ball bearings 4 in a socket 5, which is fixed to a carriage 6 running on U-shaped rails 8 disposed above the door in the frame thereof. A bearing-sleeve 9, also secured to the wings a, c, forms a seating for a sleeve 10 fixed to the wings b, d which are also rigidly secured together by bands, the sleeves having balls 11 between them. A tubular pin 12 containing a spiral spring 33 passes through the sleeves, the spring being secured at its ends to collars fast to the sleeves. A rod 13 extending throughout the length of the door, passes centrally through the tube 3 and the pin 12, and is retained at the bottom by a step bearing 14. The door is retained at the top by a lever 15, pivoted on the carriage 6 and engaging with a pin 16 in one of the rails 8 or in an angle-piece secured to such rail. The rod 13 is raised by depressing one of four handles 29 pivoted on a sleeve 28 and carrying toothed sectors 27, engaging with rings 26 fixed on the rod. Spring-controlled revolving stops 30 limit the movement of the handles, and are turned out of the way when it is required to raise the rod 13 clear of its floor bearing 14. The wings b, d are locked to the wings a, c by a lever 21 on each of the wings b, d engaging with its tooth 22 in a notch 23 formed in a channel-iron ring 18 which is secured to the wings a, c. The levers 21 are connected by arms 24 to a yoke 25 loosely mounted on the rod 13, which, on being raised by depressing the handles 29 to the position II, lifts the yoke by means of a collar 31 and so withdraws the end of the lever 21 from the channel-iron ring 18. The door wings b, d then revolve and fold upon the wings a, c under the action of the spring 12 which is in torsion when the wings are in the crossways position. The ring 18 is composed of pieces of channel-iron hinged together as at 34, the ring being kept rigid when the wings are to be set in a crossways position by curved bolts 35 which pass through the hinged parts 34. These bolts are withdrawn by revolving the wings b, d whereupon they engage with pins 37 and withdraw the bolts ; on folding back the wings, the parts of the ring then fall and hang downwards. When the rod 13 is raised to free the locking-mechanism of the wings, its top end comes in contact with a lever 39, pivoted on the same pin as the lever 15, and actuates two pivoted two armed levers carrying pins 42, to drive the pins outwards from the door frame so as to prevent rotation of the wings while allowiog their sideways movement. On raising the rod 13 clear of its bearing by depressing the arms to the position III, a tappet 47 on the end of the rod comes in contact with the lever 15 and disengages the pin 16 from its socket, thereby allowing the carriage 6 to travel upon its rails. At the sides, top, and bottom of each door-wing, draughtexcluding rubber strips are provided to engage witb the framing and the floor.