Patent GB-1001089-A (GB)
Title: Improved load supporting structure
IPC: A47C3/025
Filed: 1962-06-18
Abstract: 1,001,089. Resiliently mounted seats. AMERICAN METAL PRODUCTS CO. June 18, 1962 [July 21, 1961], No. 23419/62. Heading A4U. [Also in Division F2] A pedestal 25 for an adjustable buckettype seat, not shown, is pivoted by links 18, 19 to a channel-shaped upright 17 and is resiliently supported by a pair of spiral springs 33 the turns on one side of the centre line of each of which, when the spring is secured in position under tension, frictionally engage each other so that a scrubbing action occurs to limit the rebound action of the seat. Pivot pins 22, secured to the arm 19 to pivotally mount the latter on the pedestal 17, are slotted at 37 to receive the inner ends of the springs 33 the outer ends of which are connected to the ends 36 of a rod 48. The latter is slidably adjustable in arcuate slots 56 in the sides of the pedestal 17 by means of a screw-threaded member 52 which is connected to the rod 48 and can be threaded in or out of a nut 54 secured to the pedestal 17 to position the rod 48 and adjust the tension of the springs 33. In a modification, Figs. 5, 8, a support platform 60 for a tractor seat is supported by a pair of spiral springs 77, on a channel-shaped plate 71 adapted to be secured to the tractor. The platform 60 has depending arms 61, 62 at the end of each side pivoted at 63 to arms 64 of bell-cranks 65 the other arms 66 of which, at each side of the platform 60, are pivoted at 67 to a link 68. The inner ends of the springs 77 are connected to the outer ends of a rod 74 which is journalled in the side flanges 73 of the plate 71 and has its ends fast in D-shaped openings in the corresponding end pair of bell-cranks 65. The outer ends of the springs 77 are hooked under fingers 79 on the adjacent flanges 73. A pair of springs 96 connected between the links 68 and the adjacent flanges 73 prevent bottoming. A tension spring 85, connected between a lever arm 84 welded to the rod 74 and a screwed-rod 86 threadably engaged in a nut 89 welded to the inner end of a tube 91 which can be rotated by a handle 92 to adjust the tension of the springs 77. In a further modification, Figs. 11, 13, a vehicle bucket seat pan 117 is adjustably supported, at its front and rear ends, by pairs of bell-cranks 108, 112 carried by upstanding arms 107, 111 of a horizontally adjustable base support including a base plate 101, slide tracks 100, and a locking handle 147. The rear bellcranks 112 are fast with the ends of a rod 113 which rotates in bearings in the arms 111 as the seat pan 117 oscillates vertically. A pair of coil springs 171, 172, disposed on either side of the base plate 101, provide resilient support for the seat and have their inner ends 173 secured in slots 174 in a pivot pin fixed to an arm 157 which is angularly adjustable by means of a threaded stud 159 and nut 161 mechanism provided with an adjustment rod 163. The outer ends of the springs 171, 172 are secured to a stud 165 which extends through a slot 166 in the plate 101, is carried at the end of a second lever arm 164 pivoted on the pin 156 below the plate 101, and is connected to a link 167 pivoted at 168 to a lever arm 169 fixed to the rod 113.