Patent GB-607132-A (GB)
Title: Conveyor for loading bricklayers' scaffolds
IPC: E04G21/16
Filed: 1945-09-25
Abstract: 607,132. Extensible conveyers. ORMISTON, A. W. Sept. 25, 1945, No. 24768. [Class 78 (i)] An extensible conveyer, Fig. 5, comprises two metal frameworks, one framework A telescoping within the base framework B, which frameworks support between them an endless doublechain conveyer c<5> running on pairs of sprockets c, c<1>, c<2>, c<3>, c<4>, arranged to allow relative movement between the frameworks whilst leaving the tension of the chains unchanged, which conveyer chains are supported on tracks throughout their sinuous course and pass over twin-sprocket wheels c<1>, the spindle g of which is supported in slots in the extensible framework so that it may be adjusted by means of a spring-loaded screw g<7> to tighten the chains; and the drive to the conveyer chains is transmitted from a motor mounted on the base framework through telescopic shafting d, e, supported in a movable bearing to twindriven sprockets c journalled on the delivery end of the extensible framework. Example: framework B, Fig. 3, resting on girder l<3>, Fig. 1, inside framework A, is moved outwards by means of chain f<3> to which it is secured (at some point along girder l<1>) and which is passed round sprockets f<2>, f<1>, the latter being driven (Fig. 4) by hand-wheel f. The framework B carries twin-conveyer chain c<5>, Fig. 5, which passes round the sprockets c, c<1> thereupon ; and round sprockets c<2>, c<3>, c<4> on base framework A. The conveyer is driven from a petrol motor (not shown) on framework A through grooved pulley and clutch e<4>, Fig. 4, which drives shaft d through hollow sleeve e (by means of a key in e engaging in a longitudinal runway in d), and so rotates the driving sprockets c of the conveyer chains, when the framework B is extended or non-extended. The sprockets c<1>, the spindle of which is secured to threaded rod g<3>, Fig. 5, are adjustable in slots g<30> by means of thumbscrew g<7>, which works along the thread of g<3> against the resistance of spring g<8>. Sleeve g<4> slides with respect to both g<3> and bracket g<5> and so protects the thread. The base framework A may rest upon extensible legs s<3>, Fig. 5, which pass through sleeves s<4> secured to the framework and are fixed by pins passing through holes in legs and sleeves. The conveyer chains, which pass in their operative run along the upper girders of framework A, (Fig. 8), carry heel-and-toe bridging pieces t<1>, t<3>, on which bricks are laid and to which buckets k, Fig. 12, are attached so that metal corrugations k<4> rest on the flat portions of the chains. The shaft d is supported at d<1> on framework B and by sleeve e on framework A and at an intermediate point by bearing d<2> which bearing moves outwards with the shaft d by means of shoe d3 secured thereto and is guided along guide d<4> on framework B. The outward limit of movement is determined by rod d<6> which is fixed at one end to the movable bearing d<2>, and slides at the other end in fixed sleeve d' till a collar on rod d<6> meets an abutment in sleeve d<7>. The inward limit of movement is determined by shoe d3 meeting a stop in guide d<4>.