Patent GB-506508-A (GB)
Title: Improvements in folding perambulators
IPC: B62B7/06
Filed: 1937-11-29
Abstract: 506,508. raiding perambulators. MEAD, F. W. Nov. 29, 1937, No. 32853. [Class 108 (i)] In a folding perambulator having a bodycarrying frame, all under-structure incorporating supporting wheels 21, and a handle, the side members of the under-structure each comprises sections 14, 15, 16, Fig. 1, pivotally connected together, the central sections 15 being movable inwardly towards each other to cause the ends of the under-structure to approach one another and the wheels to be swung into positions transverse to the length of the perambulator. The end sections 14, 16 on each side are connected by vertical pivots to the upright members 10, 12 of rigid H-shaped transverse end frames and the centre sections are connected by a transverse toggle linkage 24, 25, Fig. 7. The uprights 10, 12 are pivotally connected on each side by a pair of parallel links 34, 35 and 37, 38, Fig. 1, to the vertical limb 42 of an L-shaped member the other limb 43, Fig. 7, of which normally rests on the section 15 of the adjacent side member, the L-shaped members being connected by a flexible metal strip 44. The body-carrying frame comprises a U-shaped member 32 to which the upper edge of the body is secured and the limbs 31 of which are pivotany connected to the rear uprights 12 and supported upon the front uprights 10. The handle also of U-shape is pivoted to the uprights 12 at 30 coaxially with the limbs 31 and is supported in its normal position by links 36, 48 connecting it to the body-carrying frame, each link 48 being pivotally connected at its front end to a link 45, pivoted to the member 32, and to a curved link 46 hingeable about the pivot 40. The link 48 is also extended rearwardly beyond its connection with the handle limb 29 and formed with an undercut socket for detachable engagement with the end 50, Fig. 3, of a transverse rod 51 on the body. The body 'may be provided with floor-boards the centre one 58 of which may be to the flexible strip 44. The hinge pin 26 connecting the toggle links 24, 25 carries brackets 60, Fig. 5, having secured. thereto straps &c. 61, 62 the free ends of which are slidably connected to eyes 63, 64, Fig. 1, associated respectively with the centre portion of the member 32 and the rod 51. To each end section 14, 16 of the side members is pivoted at 22, Fig. 1, a lever 19 carrying a wheel 21 at one end and acted on by a suspension spring 23 at the other end. To fold the perambulator the rod 51 is lifted to detach its ends 50 from the links 48. The strap 62 is pulled so that the hinge 26 of the toggle links 24, 25 is displaced upwardly into contact with the strip 44, the resultant upward movement of which causes the L-shaped members 42, 43 to move upwardly and thus simultaneously the side sections 15 are moved inwardly towards each other and the side linkages fold upwardly so that the end uprights 10, 12 are drawn together. The end sections 14, 16 swing inwards on the uprights until finally the two wheels 21 on each side are lying side-by-side transversely of the perambulator, as shown in Fig. 5. The toggle links 24, 25 are then disposed vertically, as shown in Fig. 2. A short strap 66 connected to the front strap 61 can then be secured to the rear strap 62 to retain the perambulator in its collapsed condition.