Patent GB-190826706-A (GB)
Title: Improvements in Door Closers and Checks.
Inventor: BISHOP CHARLES BUELL
Filed: 1908-12-09
Granted: 1909-08-12
Abstract: 26,706. Bishop, C. B. Dec. 9. Door checks; door-closing apparatus. - Relates to closing and checking apparatus for doors swing- ing in either direction, wherein the lever connecting the device to the door when moved in one direction, rotates the spring carrier and compresses the spring from the outer end, and when turned in the opposite direction compresses the spring from the inner end, and wherein regulating- devices are provided so that the speed at which the door may be closed can be regulated according to desire, the regulation being in regard to the whole stroke or to parts of the stroke with reference to one another. The improvement consists in making the cap of the spring casing rotatable and using it to transmit winding-movement from the main lever to the spring. The spring carrier 1, Fig. 5, comprises a sleeve 1<a> provided with a flange 2 on which the spring 2<a> is supported. The outer end of the spring is secured to the straight edge 3 of an upwardly-projecting extension of the flange 2, and the inner end is secured in a sleeve 6 which loosely surrounds the sleeve 1<a> and is provided with a ratchet-wheel 8. A longitudinally-sliding pin, or pawl 17, Fig. 10, mounted in a lug 14 on the rotatable cap 10, engages the teeth of the ratchet-wheel 8. The cap 10 is provided centrally with a flanged bearing 11 for the upper end 7 of the sleeve 6, and is provided at its periphery with a laterally projecting lug 12 which bears against a lug 24 on the spring casing when an attempt is made to move the cap 10 in one direction. The lug 14 is made with an inclined face 15 which is adapted to engage a depending lug 21 on the lever arm 18. The upper end of the sleeve 1<a> is provided with a lug 4 which is adapted to engage a lug 20 on the lever arm 18, and the flange 2 is provided with a lug 5, which bears against a lug 23 on the spring casing when an attempt is made to move the sleeve in one direction. When applied to a left-hand door, opening of the door causes the lug 20 to move into contact with the lug 4, and since the cap 10 is prevented from rotation by the engagement of the lugs 12, 24, and the ratchet-wheel 8 is held by the pin 7, the sleeve 1<a> is rotated and the spring wound from the outer side. When applied to a right-hand door, the lugs 21, 14 engage, and as the cap 10 and the sleeve 6 are locked together by the pin 7, the sleeve 6 is turned, thus winding the spring from the inside. The operating-spindle 25 passes through a stuffing-box in the partition 26 between the spring chamber 22 and the piston chamber 27, and is connected by a crank 28 to the piston link 29, which rests on a shelf 31 formed integral with the piston 30. The usual valve is provided in the piston head, and at one side of the cylinder 27 is formed a lug 38, Fig. 3, having an internally-threaded hole 39 for the valve 40. The outer end of the hole 39 is enlarged for the reception of the packing-nut 41, and communicates with a conduit 43, which co-operates with a port 44 in the piston 30. A lug 33, Fig. 5, is formed centrally and adjacent to the head of the cylinder, and is made with an internally-threaded hole 34 to receive the valve 35. The lower end of the hole communicates with the conduit 37, which communicates with the interior of the cylinder 27 behind the piston 30. By suitably adjusting the valves 35,40, the check may be rendered silentclosing or quick-closing. As shown in Fig. 15, the valves 35, 40 are combined in a single valve. The cylinder is provided with two ports 46, 47 which communicate with the conduit 48 terminating in the rear of the piston. The port 46 is always in communication with the cylinder either directly or through the groove 48<a> and is controlled by the valve 50. The mouth of the conduit 48 is provided with a valve 51, and the port 47 is so located that it is closed by the piston except when this is approaching the end of its closing movement.