Patent GB-190717906-A (GB)
Title: Improvements in Machines for the Manufacture of Cosaques or Crackers.
Inventor: ROBINSON OWEN
Filed: 1907-08-06
Granted: 1908-06-25
Abstract: 17,906. Robinson, O. Aug. 6. Bon-bon crackers.-Relates to machines of the class wherein the envelope of the cosaque or cracker is wound around a twopart cylinder of which the adjacent ends can be separated to expose a pin upon which the necks of the envelope are formed by means of string wound by a revolving arm. It is stated that such machines are described in Specifications Nos. 12,213, 12,214, and 12,215, A.D. 1901. Fig. 1 shows a front elevation, Fig. 6 a part section on the line 6-6, Fig. 1, and Fig. 10 a partial longitudinal section of the machine. Two cylinders a, b, rotatably mounted in sliding heads a<1>, b<1> which are reciprocated on a bed c by levers a<3>, b<3> and cams d, d' on a shaft e, are rotated through gearwheels by a subsidiary shaft driven by belting from the shaft y, and are surrounded by a number of rollers g<1>, rotated through gear - wheels by the cylinders for the purpose of rolling the cracker envelope on the latter, and revolubly mounted on two-part sleeves g pivoted on studs g<2> on the heads a<1>, b<1>. The two parts of the sleeve g are pressed together by a spring, and carry studs, one on each, between which presses the V-shaped end of a bar g<7> so as to hold the rollers g' out of contact with the cylinders when the latter are stationary. When starting the rollers g<1> and cylinders a, b, the bar g<7> is withdrawn through a lever g by depressing a treadle connected to the lever by a chain. The envelopes rest on an inclined plate n, which is pressed upwards by a spring and the front edge of each is gummed by a pad n<4>, which rests on a roller n<5> revolving in the gum-trough n<0> and is supported by links n<7> which carry it from the roller n<5> to the edge of the envelope by means of suitable links and a cam on the shaft e. The gummed envelope is guided to the cylinders through the gap g<12> by a table h<0> mounted on pivoted supports h<1>, ani adapted to be lowered by a spring through links h<3>, h<4> during the tying operation, and to be raised again by a lever on the shaft e striking a lever connected by a rod to the lever h<3>. After the envelope has been rolled on the cylinders, a neck is formed on it round a pin a<4>, projecting from the cylinder a and capable of axial movement, together with the end of the pirt a, against a spring a<5>. The neck is formed by a string i<3>, one end of which is fixed to a sliding sleeve on an arm supported by a fixed head i<1>, while the other end, after passing through guides i<5>, is fixed to a sliding sleeve i<7> on an arm i<6> capable of revolving round the cylinders by being eccentrically mounted on a rotary ring carried by a bush revolubly mounted in the head i<1>. The ring j carries a gear-wheel j<2>, which is rotated by the shaft e through the cam j<3>, toothed quadrant j<5>, and wheels j<6>, j<7>. In order to slacken the string during the winding and then tighten it, rings k, pressing against rollers k<1> on the sleeve i<7>, are mounted on rods k<0> in bearings k<2>, and are reciprocated by cams through the links k<5>, k<6> ; during their movement towards the end of the arms i<6>, the string is slack and the winding is effected by the rotation of the arm i<6> ; during their return stroke, they engage trip-levers pivoted on the sleeves i<7>, thus carrying these sleeves back and tightening the string until the trip-levers are disengaged from the rings by cams on the arms i<6>. The tightening may be moderated by forming the links of two parts joined by a spring. The string is then unwound, and the cylinder b containing the luggage is withdrawn so that a second neck may be formed round the end of the pin b<4>, by another tying-device, the luggage being prevented from moving with the cylinder by a piston b<6> mounted on a tube b<5> frictionally enclosing the pin b'. The outer end of this pin is supported on a sliding bracket b<7>, the motion of which is limited by a fixed stop b<8> and a movable one b<9> controlled by a cam b<10>, for the purpose of holding the pin b<4> stationary during the recession of the cylinder b ; a buffer spring b<0> between a collar b<x> on the tube b<5> and the bracket b<7> serves to obviate shocks when the bracket strikes the stops. When the second neck has been formed, the cylinders a, b are further separated, and the finished cracker falls into the curved end m<2> of a lever m pivoted at m<1> and tilted by a cam on the shaft e through suitable links in order to discharge the cracker. The shaft e is driven intermittently by the shaft o through worm gearing q, which carries a clutch comprising teeth engaged by a spring pawl on a disk r<3> on the shaft e. To stop this shaft, a plate v, carried on sliding bars v<1>, v<2> in a bracket v<3>, and carrying a pin w, is pressed towards the pawl by a spring r<4> so that the pin w intercepts the latter and disengages it from the teeth on the wheel q. To start the shaft e, a treadle to which a chain r<6> is connected is depressed to operate a lever r<5>, which carries a short arm r<7> engaging a notch in the arm v<2> and thus draws the pin w out of contact with the spring pawl. A second pin x on the plate v serves to stop the shaft e after half a revolution to allow an envelope to be placed on the cylinders a, b. The shaft y which drives the shaft for rotating the cylinders is couple to the shaft o by worm gearing y, and has a friction clutch y<2> operated from a treadle by a chain connected to a bell-crank lever y<7> having a roller y<8> working in a cam groove y<9> and connected by a link y<11> to the movable clutch part y<10>.