Patent GB-737265-A (GB)
Title: Improvements in or relating to conveyors for goods
Inventor: ORWIN OLAF JOHN BARCLAY
IPC: B61B10/02
Filed: 1952-04-09
Abstract: 737,265. Endless conveyers; rope railways. FISHER & LUDLOW, Ltd. July 8, 1953 [April 9, 1952; May 29, 1952; May 29, 1952], Nos. 9031/52, 13632/52 and 13633/52. Classes 78 (1) and 104 (2). A conveyer comprises carriages each supported by a track and having a driving member pivoted thereto which releasably and frictionally engages a surface of an elongated propelling element to the rear of its pivotal axis and with a pressure which increases with increase in resistance to movement of the carriage. As shown in Fig. 2, a carriage 13 running on wheels 15 on tracks is propelled by a pivoted member 19 engaging an endless driven band, belt or slat conveyer 12, whereby a force tending to retard the carriage causes increased frictional pressure between the members 19 and 12. The member 19 may have a brake lining 20 or other suitable surface and it may be replaced by a leaf spring. The member 19 has an arm 23 by which the carriage can be stopped manually, mechanically or electrically. The arm 23 may project beyond the carriage and contact a stationary carriage to bring it to rest by displacing the member 19. In a modification shown in Fig. 3, the load is suspended from an overhead track 14 by a carriage 13 supporting a pair of plates 27. The plates 27 are pinned to plates 24 of the carriage having rollers 7 running on the track and transverse members 25 with rollers 26. A shaft 33 interconnecting the plates 24 pivotally carries two arms 36 with members 34, 35 having surfaces 20 which engage an endless band 12 for driving or retarding the load. The track has spaced supporting plates with an overhead guideway 31 for the band. An arcuate bearing 37 on the shaft 33 carries a tubular member 38 supporting a spring loaded band-engaging member 41. When the speed of the carriage exceeds that of the band, the member 34 pivots out of engagement with the band, the member 41 maintains contact and the member 35 is brought into retarding engagement. When the carriage tends to move in the opposite direction to that of the belt, the arms 36 rotate to release the retarding member and engage the driving member 34. In a modified form the arms 36 may be mounted on separate axes connected by a spring. Alternatively only one arm 36 and engaging member may be used, the other arm and central member 38 being dispensed with. In a further modification shown in Fig. 6, the driving member is an endless chain 12 with dependent plates 12b engaged by members 34, 35. The carriage is stopped at fixed pionts by abutments 53 bolted to the track. The arms 34, 35 are connected to a plate 44 pivoted on the shaft 33 of the carriage 13. The plate is connected by springs 45, 46 to a pair of plates 49 having a pin 50 displaceable in a slot 51 in the plates 27. The plates 49 have a pin 52 which engages the abutment 53 to cause the plates 49 to rotate to disengage the driving member 34 from the driving chain and so stop the carriage. Removing the load causes the plates 49 to rise lifting the pin 52 above the top of the abutment and the carriage is propelled by member 35 until the pin strikes a stop 56 preventing further movement. When the load is replaced, the plates 49 sink and the pin 52 is lowered beneath the stop 56, and the driving member 34 is brought into engagement with the band for advancing the carriage. The carriage carries a rear member to engage the abutment on a stationary carriage to disengage the driving member. A cord 61 is provided on the plates 49 to stop the carriage where required. Specifications 639,244 and 639,249 are referred to.