Patent GB-413121-A (GB)
Title: Improvements in brush stock drilling and filling machines
IPC: A46D3/06
Filed: 1933-06-23
Abstract: 413,121. Brush - drilling machines. PAGE, E. B., St. Annes, Willingdon, Eastbourne, and BRITON BRUSH CO., Ltd., Wymondham, Norfolk. June 23, 1933, No. 17989. [Class 83 (iii).] A brush-making machine comprises a drum or turret in which drilling and filling operations are carried out simultaneously on oppositely-arranged stocks which are intermittently positioned laterally and longitudinally by cam mechanism operating to move axially tubes or rods arranged concentrically about the axis of the drum, and the machine can be used for the manufacture of brushes with or without lateral and longitudinal spread of the bristle tuffs. In the construction shown, four concentric tubes a, b, c, d are provided in the machine, two of which b, d are adapted to move axially. A shaft a<21> carries cams which are adapted to operate bell-crank levers a<4>, b<4>, c<4>, so as to impart sliding movement to collars a<9>, d<30>, h respectively. The collar a<9> is connected to the tube b, the collar d<30> to the tube d, and the collar h to a member c<5>. The tube b through gudgeon pins C<22> operates bell-crank levers a<10> carried by brackets c<17> on the tube c. These levers act upon the ends of rods a<11>, each of which, as shown in Fig. 5, has a pin a<12> projecting through a slotted sleeve b<9> and being engaged by a toothed quadrant a<18>. The quadrant which is pivoted to a block c<7> is thus oscillated, producing similar movement in a pivoted toothed quadrant a<14> connected to the stock, whereby the latter is given lateral spread. Longitudinal spread is provided by movement of the shaft d which has four arms d<20> carrying members d<22> which are formed with grooves d<23> for engagement by crank arms d<24>. These arms are each fixed to a sleeve b' whereby the sleeve is caused to turn on its axis to effect the longitudinal spread. Compensation for the brush stocks being at varying distances from the tools due to the spread is effected by the movement of the collar h transmitted to the head c<5> which is provided with pairs of cheeks c<20> formed with inclined slots C<21>. Between each pair of cheeks is fitted a sliding member c<8> in which the block c' is pivotally mounted by means of the sleeve b'. This sleeve at its ends engages in the inclined slots in the pair of cheeks. The member c<8> has an aperture to receive a radial rod c' extending from the fixed tube c. The arrangement is such that movement of the head c<5> causes movement of the brush stocks towards or from the tools. In a modification shown in Fig. 4, each cheek c<20> is provided with a member k having an inclined surface adapted to slide on a surface k<2> on the member c<8>. The member k has a lateral projection k<3> adapted to engage in a slot in the cheek c<20>. The cheek c<20> and the member k have racks engaging opposite sides of a pinion k<7> which is secured to the rod c'. As the head carrying the cheeks c<10> is moved inwardly the rack k<5> through the pinion k<7> moves the member k so that it maintains contact with the member c<8> while the latter moves radially towards the axis of the machine. When the machine is to be used on work which does not require lateral or longitudinal spread, the collar d<30> and its associated mechanism is dispensed with or rendered inoperative and the tube c instead of being fixed is rendered movable and connected to the head c<5>. The blocks c', slides c<8>, and inner and outer shafts a<11>, b<9> are dispensed with and replaced by blocks u<1>, as shown in Fig. 14. The lateral movement of the stock is effected by the bell-crank lever a<10> engaging one end of the shaft u' on the block u<1>. The longitudinal movement is caused by movement of the head C<5> and tube c. Turret-rotating and locking mechanism.-Figs. 2 and 3. The turret carrying the work holders is indexed by means of a pawl d<1> engaging rods h<1>on the turret, the pawl being adapted to be connected through a slotted link d<5> to a lever d<6> which is oscillated by means of a roller d' engaged by a cam d<8> on a shaft d'. The lever d<6> has a slide d<55> which moves freely in the slot d<10> until the last hole in the stock has been filled and the last hole in the opposite stock has been drilled. The link d<5> is then moved about its pivot d<42> so that the slide d<55> is in a portion d<11> of the slot d<10>. Further movement of the lever d<6> will then act to pull the pawl d<1> downwardly and index the turret. The movement of the link d<5> about its pivot d<42> is effected by means including a rod d<45> reciprocated by means of a cam d<27> on the shaft a<21>. The turret is locked in indexed position by means of a pin e<4> engaging notches e<5> in the turret, the pin being operated by means of the inner cam face on the cam d<27>. Specification 276,692, [Class 83 (iii)], is referred to.