Patent GB-190426894-A (GB)
Title: Improvements in Door Checks and Closers.
Inventor: BARDSLEY JOSEPH
Filed: 1904-12-09
Granted: 1905-04-20
Abstract: 26,894. Bardsley, J. Dec. 9. Hinging, methods of; door checks; door-closing apparatus.-Relates to a spring hinge containing an actuating spindle or pivot, upon which a door may be mounted, and serving as a check and closing apparatus suitable for single or double acting doors. A shoe 17 attached to the bottom of the door is carried by the squared end 16 of a vertical spindle 11 rotatably mounted in the enclosing casing 10, which fits into the flooring, being closed by suitable cover plates and fixed by means of projecting flanges. On the spindle 11 is formed a heart-shaped cam 20, lying horizontally between the upper and lower members of the yoke 24, and engaging rollers 21, 22, 23 mounted between these members. Integrally with the yoke 24 is prefer. ably cast a rod 25 and cylinder 26, the latter of which is formed with a shoulder 27 provided with bevelled ribs 28, Fig. 4, adapted to receive a locking-ring 29 having corresponding inclined ribs 30, by means of which it may be slipped on the end of the cylinder 26 through the straight grooves 60, turned to bring its ribs 30 into line with wedge spaces 61, when it may be drawn outwards and securely retained in position on the shoulder 27 to serve as an abutment for the closing-spring 31. When the door is opened, the heart cam 20 presses against one of the rollers 22, 23, leaving the front roller 21, which then travels along its side. This action draws the yoke and cylinder towards the spindle 11 in opposition to the pressure of the spring 31 between the stop 32 and the shoulder ring 29. The cylinder 26 has thus a reciprocating action on a stationary hollow piston 33, fixed by means of a lug 34 with a horizontal slot to receive the plate 35, to which it is pivotally secured by a pin 36. This plate is fastened upon supports 37 by means of screws 38 engaging slots 39 in the form of circular arcs with the spindle 11 as centre. The shoulder 163, against which the abutment ring 32 bears, is curved to retain the spring &c. in alignment during any radial shift. The heads of the screws 38 are arranged at a distance apart, to lie on either side of the door and to be accessible from the surface ; by this means the door is adjusted to close properly though it may not lie truly. The chamber is arranged to contain oil, which enters the piston 33 through an orifice provided with a ball valve 41 which prevents return of the oil through that opening, and causes it to emerge by an adjustably constricted passage 42, 43, 45. To adjust the tapered groove 43, the pin 44 is provided with a slotted crank arm 47 which can be rotated by a pin 49 on a superposed crank 48 attached to a rotatable adjusting-pin 50 mounted in a closely-fitting sleeve in the cover plate 51. This arrangement is necessary to provide means of adjusting the escape of the oil when the plate 35 and lug 34 have been adjusted to bring the pins 44, 50 out of alignment. Oil is supplied to a height indicated by the line 55 through the aperture 54, closed by a screw plug 62, which extends only partially to the bottom of the sleeve 54, so as to leave an air chamber to prevent leakage of oil. For the same purpose, an annular groove 15 is formed in the sleeve 13 about the spindle 11. Further, annular grooves 18, 52 are formed about the spindle 11 and pin 50 respectively, into which, by means of apertures 19, 53 respectively, some oil-retaining packing material may be forced.