Patent GB-482188-A (GB)
Title: Cushion joints or mountings
IPC: F16F7/00
Filed: 1936-06-19
Abstract: 482,188. Resilient mountings. LORD, H. C. June 19, 1936, No. 17067. Convention date, March 5. [Class 108 (iii)] A resilient mounting comprises a body of resilient material united by faces substantially at right-angles to each other to similarlyarranged, spaced-apart faces of a supporting member and a load-carrying member so that the load is sustained by the resilient material under shear and shear resistance is also offered to thrusts in a direction parallel to the face of the supporting member, the resilient material being slotted or in spaced sections or provided with openings in order to reduce the shear resistance in a direction parallel to the face of the supporting member as compared with the shear resistance in a direction at right-angles thereto. As shown in Figs. 1, 2 the supporting member comprises an apertured plate 1 secured, e.g. to a bracket or transverse frame member of a vehicle, and the load-carrying member comprises a plurality of upright plates 4 extending with clearance through the aperture in plate 1 and at right-angles thereto, the plates being connected by a rubber mass 6, preferably bonded during vulcanization to the plates, so as to support the major portion of the load in shear. Normally the upper and lower faces of the rubber are formed convex and concave respectively and are engaged by flat snubbing plates 10, Fig. 3, the parts being connected to a supporting bracket 13 by a central bolt 12 passing through a slot 20 in the rubber. Projections on the plates 4 engage slots in the plates 10. Heavy shocks or increases in load flatten the rubber so that the supporting force is increased by compression of the rubber portions overlapping the plate 1. These portions may be reinforced by loose fibres or may be of denser rubber. In order to accommodate misalignment of the bracket 13 and of the supporting bracket 15 for the plate 1, the snubbing plates 10 may have rounded projections 21, Fig. 3, co-operating with similar depressions in the bracket 13 and nut 23 or bolt-head respectively. Lateral resistance to engine torque thrusts is reduced by making the bolt aperture 20 of rectangular form. Alternatively, each plate 4 may be connected by a separate rubber portion or portions to the plate 1. The front and rear ends of a vehicle engine are shown supported by a plurality of mountings constructed as described above. In a further construction of mounting, Fig. 17, a slot 40 extends across the rubber below the plate 1 in order to reduce lateral resistance while maintaining the maximum snubbing resistance on the load side of the mounting. Specification 474,639 is referred to. The Specification as open to inspection under Sect. 91 comprises also two other constructions of resilient mounting in which the rubber is neither slotted nor in spaced sections. In one construction two plates 4 and in the other construction four plates 4 are provided, and a hole between each pair of plates permits the passage of a securing bolt 12. A single mounting is also shown supporting the rear end of a vehicle engine. This subject-matter is included in Specification 482,260 and does not appear in the present Specification as accepted.