Patent GB-1135252-A (GB)
Title: A keeper member, a bolt, and door fastening means comprising same
Inventor: OLANDER ROLAND JOHN
IPC: E05B65/16
Filed: 1966-01-28
Abstract: 1,135,252. Bolt fastenings. W. H. MINER, Inc. 28 Jan., 1966, No. 3885/66. Heading E2A. A keeper member for use in the door fastening means has two opposite sides the first side comprising a planar mounting surface 37 and the second side having first and second projections 38, 40 extending therefrom, the first projection 38 being laterally spaced of the centre of the keeper member and having a lateral opening 42 therein with a first surface 44 therein being parallel to the planar mounting surface and facing away from the second side of the keeper member and a second surface 46 spaced outwardly from and facing said first surface said second surface being at an oblique angle to said first surface, the first projection also having upper and lower inner surfaces 48, 50, said second projection also extending upwardly from said second side of said keeper member and being laterally spaced of the centre of the keeper member but spaced away from said first projection and said second projection having an open recess therein with upper and lower inner surfaces 56, 58 and a surface 52 facing away from said second side of the keeper member and towards the centre of the keeper member at an oblique angle to said planar mounting surface. A bolt for use with the keeper member is mounted on a shaft 60 and comprises first and second arm portions 72, 74 extending away from the shaft, said first arm portions 72 having a planar end surface 76 lying in a plane which is generally parallel to the axis of the shaft and also oblique to the lengthwise axis of said second arm portion, said planar end surfaces of said first arm portion also extending to each side of and being perpendicular to a plane passing through the axis of rotation of said bolt, said first arm portion further having a nose portion 78 adjacent said planar end surface and upper and lower surfaces 82, 84, said second arm portion 74 having upper and lower surfaces 88, 90 and a planar end surface 86 facing in a direction away from and generally opposite said planar end surface of said first arm portion and said planar end surface of said second arm portion being disposed in a plane which is at an oblique angle to the lengthwise axis of said second arm portion. In the door fastening means shown there are two said keeper members and two said bolts one at each end of the shaft. The upper and lower inner surfaces 48, 50 of each bolt taper towards each other in a direction towards the planar mounting surfaces 37 away from the centre of the bolt and also in a lateral direction away from the centre of the keeper member. The upper and lower inner surfaces of each recess also taper towards each other. The surfaces of the bolt correspondingly taper and the tapers prevent relative vertical and lateral movement between the bolts and the keeper members. In use the two keeper members are mounted on a door frame which contains a pair of doors, the shaft being mounted in bracket members 62 on one door 22 which holds the other door closed. When the shaft is rotated in the fastening direction the arm portion 72 of each bolt first enters its lateral opening 42 and the surfaces 76 engage the surfaces 46 to force the doors within the frame, further rotation of the shaft 60 engages the arm portions 74 with the recesses 52, the engagement of the upper and lower surfaces of the bolts with the corresponding surfaces of the recesses aligning the door in a vertical direction. When the bolts are fully engaged with the keeper members the oblique surfaces 76 and 46 are fully engaged with each other in what is effectively an over-centre position. The shaft is rotated by a hand lever 66 which in the fastened position of the doors is held by a seal assembly of known form. Reference has been directed by the Comptroller to Specification. 1,002,214.