Patent GB-189820516-A (GB)
Title: Improvements in Means and Appliances for Opening, Closing, Regulating and Fastening at any Required Angle Swing Windows, Doors, Ventilators, Fanlights, and Analogous Articles.
Inventor: ADAMS ROBERT
Filed: 1898-09-28
Granted: 1899-10-21
Abstract: 20,516. Adams, R. Sept. 28. Window and d o o r fastenings; emergency-exit fastenings.-Relates t o means and appliances for opening, closing, regulating, and fastening at any required angle swing windows, doors, ventilators, fanlights, and analogous articles. Fig. 1 shows a catch 26 and stay 22 for a ventilator or the like 20. The catch 26 is formed as shown in section in Fig. 4. A block 31 with a facing 30 of rubber or the like is pivoted at 27 to a plate 24, and is acted upon by a spring 29 to make it engage frictionally with the stay bar 22. When the ventilator is closed, the block 31 engages a projection 32 on the stay. By means of a cord, chain, rod, or the like engaging the catch 26, the ventilator can be opened and set at any angle or closed by simply pushing it backwards. The bar 22 may be formed with a roughened surface, and the block 31 modified by forming it with a corresponding surface to engage with the bar. In a further modification, eccentrics on the ends of a cranked bar engage angle-iron sectors and hold the ventilator at any angle. A catch on the ventilator holds it when closed, and is arranged so that pulling down the latch also actuates the crank to release the eccentrics. In the emergency-exit fastening described in Specification No. 6614, A.D. 1895, the lever 48 of the push-bar is formed with a spring catch 51 which engages the lock plate 54 as shown in Fig. 9, so as to hold the parts in the unbolted position. In a modification shown in Fig. 10, a projection 47 is formed on the catch, and is operated by a key inserted in the lock. In cases where a push-bar is not used, the upper end of the lever 48 is enlarged and the word ''push" or the like is engraved upon it. Fig. 12 shows a modification of the bolt. actuating mechanism described in Specification No. 6614, A.D. 1895. A disc 58 turning freely on the spindle of the toothed wheel 56 is actuated by the lever 50, Fig. 9, to release tumblers 55 before the toothed wheel 56 itself is actuated. The disc 58 is formed with a projecting flange 59 which overlaps the edge of the wheel 56 so as to engage the tumblers. A cam piece 42 is also fitted to the wheel 56 for lifting a tumbler which releases the catch 51, Fig. 9, when the door is to be bolted from the other side. When one bolt is required to travel a greater distance than the other, the toothed wheel 56 is made with a greater radius on one side than on the other, or the bolt may be made in two parts connected by a lever which increases the travel. When the door is to be bolted to the side frame, the lever 50 operates a pivoted bolt formed with a tail piece equivalent to the toothed wheel 56. Floor sockets for door bolts are constructed as shown in section in Fig. 18. The socket 61 is secured to the floor by a plate 60, and is provided with a spring plug 62 which is depressed by the bolt. The plug is retained in the socket by a pin 64 engaging a bayonet slot or the like.