GB634867A - Improvements in four-wheel overhead trolley conveyor assemblies - Google Patents

Abstract

634,867. Elevated railways. WEBB CO., J. B. July 30, 1947, No. 20600. Convention date, June 10, 1946. [Class 104 (ii)] A four-wheeled overhead trolley assembly adapted to be supported for dirigible movement along the substantially horizontal webs of a supporting track comprises a pair of trolley brackets spaced longitudinally along a track provided by the bottom flanges 11 of an I-beam 10, each bracket consisting of a pair of oppositely disposed identical bracket members 13 each with a single trolley wheel 12 mounted at its upper end upon a substantially horizontal axis 14, and a single means 24 for connecting the oppositely disposed bracket members together at their lower ends in lateral spaced relationship. The means 24 comprises a cylindrical member with a pair of diametrically prejecting trunnions 25 which extend in opposite directions into bearing apertures provided in the lower ends 23 of the bracket members 13, and provide a pivotal mounting for a bolt 29 extending axially through the member 24, the two bolts 29 thus mounted in the trolley providing support for an inverted channel 28 to which the limbs of a U-shaped load-attaching member 39 are pivoted intermediate the ends of the channel. The trolley wheels 12 are formed with substantially flat rolling surfaces 37, the function of flanges being assumed by rollers 20 which bear upon the edges of the track flange 11 and are mounted upon vertical axes 21 supported by upper and lower pairs of longitudinally extending arms 18, 19 respectively on each bracket member 13. The bolts 29 between the members 24 and channel 28 provide a swivel connection enabling the trolley to follow a curved track, the effect being assisted by providing the upper ends of the members 24 with recessed seatings to receive round-faced nuts on the bolts.