Patent GB-649325-A (GB)
Title: Feeder head for shaker conveyers
IPC: B65G65/00
Filed: 1947-07-04
Abstract: 649,325. Shaker conveyers. GOODMAN MANUFACTURING CO. July 4, 1947, No. 17732. Convention date, Sept. 29, 1941. [Class 78 (i)] A feeder head for shaker conveyers includes a reciprocable driving trough section 10 and an extensible trough section 11, and a frame 21 mounted on the reciprocable section, wherein the extensible trough section is translatably influenced by the movement of the other section through gripping means 25 carried by a carrier member 26 operatively connected with the reciprocable section and including a link 34 connecting the lower end of the carrier member with the frame, and another link 45 connecting the upper end of the carrier member with the frame, both links being relatively movable with respect to the frame, and means (e.g. cams 56 and 57) selectively operable to hold either one or both of the links in engagement with a stop 53 on the frame to cause the link which is engaged with the stop to move with the frame and exert a force on the carrier member to advance or retract the extensible trough section or to reciprocate the extensible trough section in step with the reciprocable conveyer section. Layout (Fig. 2).-Reciprocating trough 10 has an extension 17 which carries bearing blocks 18 pivoted thereto at 19, which blocks support the sides 20 of extensible trough 11. The latter has an integral shovel 12 which rests on the ground at the front and feeds coal to trough 10 via trough 11. To each side of the extension 17 of the reciprocating trough 10 is pivoted a shoe 21 which forms the support for shaft 59 and for the lever system 45, 33 which operate the grip blocks 25 to cause movement of trough 11. Lever system 45, 33 (Figs. 3 and 7).-Extension of the extensible trough 11 is effected by grip blocks 25 which are caused to grip and advance the edges 20 of the trough. Grip blocks 25 are pivoted to blocks 29 adjustable in carrier 26 by screws 32. Carrier 26 at the top is pivoted to lever 45 pivoted to rocking member 47 which pivots about 40 in shoe 21 and which has a lower arm 51, the latter engaging with a stop 53 on shoe 21 and also carrying a roller 60. Carrier 26 at the bottom has a pin 41 through which slides rod 34 which is fixed to yoke 36, the yoke being pivotally suspended from links 37 and 38 journalled at 39 and 40 in shoe 21 and carrying a roller 61. On rod 34 is a slidable sleeve 42 and a strong spring 43 so that when movement of 34 causes forward movement of the trough 11, any obstruction thereto will cause the spring to yield and so prevent shock to the mechanism. Spring 63 is between and presses against arms 64 and 65 fixed respectively to rocking arm 47 and link 37 of yoke 36, so that both rocking arm 47 and yoke 36 are kept pressed against stop 53 on shoe 21. Cam system (Figs. 4, 10, 11).-Handle 70 is fixed to and rotates shaft 59 which is journalled in shoe 21. On shaft 59 is freely mounted sleeve 58 which is formed with cams 56, 57; and connection from the cams is made to shaft 59 through semicircular extension 79 of the sleeve, which extension is connected to a pin 74 fixed on shaft 59 by a member 75 which is spring- pressed against the extension 79 so that movement of the shaft is transmitted to the sleeve, but any shocks on the extensible trough will be transmitted by the cams to sleeve 58, but will then be absorbed before they reach the shaft 59. Additionally, to shaft 59 is secured star-wheel 83 having three indentations, the roller 88 being mounted on arm 89 journalled at 91 in shoe 21 and being urged to co-operate with the indentations by spring 92 mounted on shoe 21. The handle 70 therefore can move the cams 56, 57 into three specific positions. There may be two such systems of levers and cams, one on each side of the conveyer. Thus a second system of cams may be mounted on shaft 103 and work in the same way, the shafts 59 and 103 being coupled by a flexible coupling 104. Operation.-(1) When the handle is in the middle (vertical) position, cam 56 (Fig. 3) is pressed against roller 60 on the rocking arm 47 and cam 57 (Fig. 7) is pressed against roller 61 on yoke 36. Since spring 63 forces both rocking arm 47 and yoke 36 against stop'53 on shoe 21, it follows that both lever 45 and rod 34 receive the movement of shoe 23 and therefore of the reciprocating trough 10 so that grip blocks 25 grip trough 11 in both directions and both troughs are reciprocated together. (2) When the handle is moved to the forward position, cam 57 is in contact with roller 61 and cam 56 is moved out of contact with roller 60 so that arm 34 is reciprocated whilst lever 45 is free, and this causes the blocks 25 to grip only on the forward movement of the reciprocating trough and so step-by-step urges the extensible trough bodily forward. (3) When the handle is moved to backward position, cam 56 contacts roller 60 and cam 57 comes out of contact with roller 61, so that lever 45 is reciprocated and arm 34 is free and this causes the blocks 25 to grip trough 11 on the backward strokes only so that the trough is withdrawn bodily backwards till stop 95 (Fig. 2) on carrier 26 contacts the shovel.