Patent GB-190313811-A (GB)
Title: Improvements in and connected with Simultaneously Operated Multiple Cam Devices for Operating and Fixing in Position Bulkhead Doors and other Doors, Ship's Side Lights and other Windows, Cylinder Covers and other Covers.
Inventor: PRESTON FREDERICK GEORGE PANIZ
Filed: 1903-06-20
Granted: 1904-07-20
Abstract: 13,811. Preston, F. G. P., and Ralston, G. C. June 20. Bulkhead doors; sidelights.-Relates to multiple cam devices for quickly opening and closing bulkhead doors and other doors, and ships' side-lights and other windows. Fig. 1 is a front elevation, one half showing the casing removed, and Fig. 2 a sectional side view of a ship's bulkhead door. The metal door a works with gun-metal facings on the door frame b ; upon the frame are fixed brackets c on which are mounted cams d connected by links e, which are provided with nuts f for adjustment. The cams g, h are on the same shafts i, j as the top and bottom pairs of cams d. The door is normally free to slide up and down on the frame b, and is operated by a sliding bar u, which is provided with two locking-arms v for driving down the cams, the cams being unlocked by the fingers W. The rocking link s is slotted nearly the whole of its length with a slot z, which is angularly inclined at the top and in which travels a roller 1 carried on a pin 2 attached to the bridge l. When the door is descending, the roller 1 keeps the rocking link s vertical, and the sliding bar o is driving the door, but, when the door is nearly closed, the pin 2 is in the inclined part of the slot z and throws over the rocking arm s, so that the sliding bar o travels across the slot r and begins to operate and lock the cams d by the arms v. In one of several modifications, the rocking link s, pin p, and roller q are replaced by a sliding flat bolt passing through holes in the bar o and the door a. A bevelled edge on the bolt engages with an incline on the door frame while the sliding bar o is driving the door, and, when the sliding bar is free, the cams are locked as before described. In another modification, in conjunction with the sliding bar o, a central bolt cam 43, Fig. 12, is used. Another form of bolt action is shown in Fig. 19, in which a bolt 16 slides in a guide 17 attached to the sliding bar o, its motion being limited by the slotted setscrew 18. A cam 19 is pivoted in a vertical plane on the pin 20 on which is fixed a double-armed lever. A tappet on an arm bolted to the bridge turns the cam 19, and the pressure on the bolt 16 causes it to slide outwards and downwards, leaving the sliding bar free to drive the cams on the door. On the upward stroke of the door, an inclined plane bolted to the bridge strikes the double-armed lever and drives the cam 19 downwards. A coiled spring may be used instead of the inclined plane. In the form shown in Fig. 12, all the cam mechanism is fixed on the door. The double cam 43 is released during the last downward movement of the door by an arm 44 on the cam 43 striking against a projection 45 on the inside of the bridge 29. Immediately, the cam is rotated towards the left hand, and the sliding bar o locks the cams 31, 32, 33 by means of links 46 joining lugs 47 and levers 48 fixed on the top cam shafts 36. Any of the doors above described can be operated by an endless chain worked by worm-wheel gearing, or by a hydraulic cylinder, the piston of which can be attached directly to the sliding bar o. Fig. 23 shows the device applied to a sliding deckhouse window. In closing the window, the chain-wheels 94 being rotated by worm gearing 96, the chains 93 lift the sliding bars 98, which lift the glass frame by by the spring 100 ; on the glass frame striking the top of the frame, the sliding bars 98 continue to move on, locking the cam 103 against the inside of the frame and forcing the glass door on to the rubber seat by slots in the sliding bars driving pins on the cams 103. Fig. 28 shows a circular hinged door. To close the door, a key 132 is inserted to turn the hinge-pin 126 and with it the door 111. Then, as the hinge-pin is turned still further, the bolt 127, Fig. 33, rises, and the top rounded end disengages the door from the nut or hinge-pin 126, whereupon the bolt 127 pulls the link 129 and the ring 123 round over the lugs 125 on the door, the cams 121 being, by their tooth engagement with the ring, turned so that the ring is depressed ; the inner rim of the ring then presses on the lugs 125 of the door, forcing the latter against a rubber ring. In a modified sliding window, six cams are mounted, three in each of the two side-members. The frame is raised or lowered by an endless chain and sprocket-wheels. Fig. 40 shows a modified sliding bulkhead door. As the door 180 drops, the lever 184, striking the block 190, forces the bolts 187 out of their recesses in the locking-bar 183, thus permitting the slide 182 to descend freely, until it strikes the bolts 186 and unlocks itself from the door. At its lower end, the slide 182 has a pin 192, which engages with a notch in a pivoted cam 193 on a shaft 194, which then transmits motion to other cams for acting on the door. Fig. 43 shows the cam action applied to a laterally-hinged door. In closing the door, the hinge shaft 201 is rotated, the sockets 203 driving by means of the inclined planes 215, 216. When the door is closed, the guides 217 have passed clear of the planes 218 on the sockets 203, and, on still turning, the inclined planes 215 run up the inclined planes 216, throwing the sockets 202 out of engagement with the brackets 203, and leaving the door shaft then free to drive the cams only by means of the levers 203, thus driving the frame 207 by the rods 205. The cams 210 are then carried by the frame 207 beneath the brackets 211, 212.