Patent GB-404638-A (GB)
Title: Improvements in or relating to door or like return springs and locking means therefor
IPC: E05F1/10
Filed: 1932-07-07
Abstract: 404,638. Door-operating appliances; springs. HYDE, W. J., 5, Inchmery Road, Catford, London. July 7, 1932, No. 19276. [Class 65 (i).] A spring closing device for doors and the like comprises a pair of members attached to the door and doorpost, or corresponding parts, a spring connected to one member and arranged for movement relative to the other, the spring being nevertheless bent when the members are moved by opening of the door, and a device which so co-operates with the second member and with the spring as to limit the relative movement only when the door is closing under the action of the spring, the position of the device being adjustable to enable the spring to hold the door at different positions ; a second similar device may be used for co-operation with the spring and the second member to limit the relative movement between them in the other direction, the position of this device also being adjustable to enable the extent of relative movement to be adjusted, or, by co-operation with the first device, to prevent relative movement between the spring and the second member in both directions. The device, or devices, may be adjustably mounted on the spring to be engaged by the second member, and in the case of a helical spring may consist of a nut or nuts screwed for engagement with the turns of the spring. The spring may be secured to the first member by screwing it into a threaded aperture in the member. In the form shown, a helical spring 7 is secured to an L-shaped member 17, attached to the door-post 19, by screwing it into a threaded aperture in the member 17 ; a screw plug 24 reinforces the joint, and a locknut 25 is screwed on the projecting end of the spring. The spring passes freely through an aperture 23 in another L-shaped member 16 attached to the door 18, the aperture 23 being preferably so arranged with respect to the aperture in the member 17 that the spring is slightly bent when the door is closed, so that it still exerts a small closing force. As the door is opened about its hinge 15, the spring is bent further, thus producing a closing force ; after a time the apertured limb 27 of the member 16 comes into contact with a nut 22 adjustably screwed on the spring, this nut therefore resiliently limiting the opening of the door and introducing an increased closing force when the door is further opened by compressing the spring. A similar nut 21, which is the first device abovementioned, is mounted on the spring on the other side of the limb 27, and may be adjusted so that the limb 27 comes into contact with it before the door reaches its closed position, this nut therefore resiliently limiting the closing movement of the door and, if the door is further closed bv force or momentum, causing extension of the spring to produce a force bringing the door back to the position in which the spring is unstressed longitudinally ; this nut 21 may be used to give a checking effect to avoid slamming of the door by adjusting it to come into action just before the door completely closes. By screwing both nuts 21, 22 up against the limb 27 of member 16, the door may be held resiliently in any position, being returned to that position by the spring when moved in either direction. The nuts may be provided with silencing pads 26 of material such as leather or rubber. The members 16, 17 may be formed integral with metal door and frame members. Specification 381,197 is referred to.