Patent GB-236732-A (GB)
Title: Improvements in and relating to folding doors and shutters
IPC: E06B9/17
Filed: 1924-07-15
Abstract: 236,732. Bretos y Claveria, M. July 15,1924. Folding doors; shutters.-The invention relates to a combined folding door and folding shutter. The door consists of corrugated slats movable in guides 2 and balanced by spring drums 27, 28 on a spindle 26 carried by a pair of brackets 4 which are adjustably bolted to the frame 3<1>, 6 and to the guides 2. The spindle-supporting arms 25 are non-rotatably but adjustably secured by squared bolts to the brackets 4. The spring drums are mounted on the reduced parts 31"' of hubs 31, Fig. 14, non-rotatably held on the spindle 26 by collars 34 bolted on the spindle and provided with projections engaging the slots 33 in the hubs. The springs are secured between slots 31<1> on the hubs and pins 38 joining the two halves of the drums. Fibrous bearing washers 35 enclosed by spring expanding washers, Fig. 7, are provided in the drums. The door is engaged with the drums 27, 28, by a U-shaped clip engaging two pins 41 and the upper edge of the door, and the shutter is connected to the two drums 29, 30, by steel tapes 54 engaged in openings 54' in flanges on the drums, which are adjustably spaced apart by an intermediate flanged and slotted sleeve 52. Two hoops 53<1> adjustably connected to the door bear on the tapes 54 and act as brakes. The drums may be locked to the spindle for repairs &c. by' means of a plug or key having projections to enter respectively recesses in the drum and the slot'33 in the hub 31. The guides 55 for the shutter, Fig. 2, are connected to rods 56 by pivots 58 and hooks 57 and adjustably secured to rods 60 oil the lower part of the door by a universal joint, outwardly turned channels of the guides engaging the edges of the shutter opening. The upper ends of the rods 56 are housed in a channel on the door. The hinges of the shutter are reinforced by curved fibrous links having projections 65" placed at the ends of the slats and joined by staples 66 engaging the surface of alternate slats, Fig. 24. The lowest slat of the shutter has a roller 69 carried in a bracket riveted thereto, a pin 70 on an extension of the bracket engaging the curled edge of the slat, Fig. 49<a>. Other bearmg rollers in planes at right-angles to each other, alternately, are mounted on the door and shutter by means of riveted arms 77, 80. A plate 75 hinged to the door at the bottom of the shutter opening may be rotated into the position shown in Fig. 36 to form a sill for the shutter. The lateral guides of the door are held by means of adjustable slotted braces shown in Figs. 42, 44, and 45, according as the door is on the inside of the wall, or on the outside, or in the same plane. A bolt for the door is shown in Fig. 29 and consists of a stem and curved operating end apertured to engage a keeper 89 in which may be secured a padloch 91. A suitable lock having a plate curved to conform to the shutter is riveted thereto and operates bolts slidably mounted on the shutter and adapted to engage housings in the guides 55; a bolt is also provided adapted to engage an adjustable opening in the frame and provided with a trunnion projecting through its housing which may be secured in the open or closed positions by a pivoted catch. The stop and eye-bolt are secured to the bottom of the door bv threaded stems and flanged nuts. The operating hook consists of threaded sections, the end section being provided with two hooks in planes at right-angles to each other. An operating member 72<1> is pivoted in the bottom of the shutter and adapted to be turned outwardly for foot operation when closing the shutter. A spring bears frictionally on the member 72<1> to retain it in position. Before folding the door, the shutter is folded and the guides 55 and the rods 56 are disconnected. In a modification, Fig. 70, the shutter and door may be provided with guides 136 and 137 to extend over a show case &c., or to form an awning. The awning guides 137 are pivoted at 139 and connected to cords 156 passing over guide pulleys 169, 167, 160, to a spring drum in the casing 146. Pivoted plates 143 and 144 form side and front curtains. The drums for the door &c. are carried on the spindle 26 housed in bearings in side plates 118 provided with polygonal plates 118" adjustably connected to shock-absorbing blade springs 122. A pivoted corrugated shutter 125 closes the top of the door opening. The cord passes between rollers 147 to the spirally-grooved reel 155 which is adjustably anchored to the spring drum by a ratchet 158 engaging registering notches in the reel and drum. A pivoted stop 159 is adapted to engage pins 154 in the drum. To adjust the spring tension, the drum holder is partially withdrawm from its case 146 and held bv notches 150 engaging pins 146<111> and .by an arm 153<1> engaging a pin 146<1111>.