Patent GB-191013264-A (GB)
Title: An Improved Bowling Machine.
Inventor: CARTLAND GEORGE HOWARD
IPC: A63B69/40
Filed: 1910-06-01
Granted: 1911-03-09
Abstract: 13,264. Cartland, G. H. June 1. Bowling - machines.- In a bowling-machine of the type described in Specification 13,801/09, transmission gearing mounted on the arm and engaging with a stationary member of the machine is employed to impart a spin to the ball, and the operating- spring is utilized both f o r effecting t h e d elivery movement of the arm and for bringing it to rest. Means are provided for adjusting the direction of the face of the machine. In one form, the ball - holding socket a, Fig. 1, is rotated during t h e movement of the arm A through bevel-gears b and a shaft b<1> by a roller B engaging with one or other of two fixed quadrants C, Figs. 1 and 7. The roller B is moved by means of a hand - lever D into engagement with one runner or the other according to the direction in which it is desired the spool shall rotate. As the arm leaves the quadrants, the roller is moved automatically clear of the runners by rollers c<1>, Fig. 7, engaging a loop d<2> on the lever D, so that a clear path is provided for the return movement of the arm. An alternative ball-holding socket, or " hand " a is shown in Fig. 10. The hand, in which is mounted a spool e, is secured to a sleeve F encircling a spindle a<1> geared to the spool and driven by friction gearing as described above through the shaft b<1>. If the hand and sleeve are held stationary, the spool e is rotated by the spindle, causing the ball to rotate about an axis at right-angles to the line of flight. If the spindle and sleeve are locked together, the band rotates as a whole, the ball being rotated about an axis parallel to the line of flight. The arm A is mounted on a disk H, and is propelled forward by a spring G through a chain g<1> attached to the disk, the slack end of the chain passing round the disk and being also fixed to the spring G. In operation, at the end of the delivery stroke of the arm, the slack end of the chain becomes taut and again extends the spring G, which overcomes the inertia of the arm and returns it to normal position. The throw of the arm is varied by altering the point at which the chain is attached to the disk. The tension of the spring in the above form is adjusted by a cable which is attached to its lower end passed round guide - pulleys and connected to an adjustable screwed spindle o passing through a boss on the frame and provided with a wing-nut p. The apparatus is set in regard to the wicket by swivelling the frame L in the main base P; and revolving it by a tangent screw m<1>. In a modification of the machine particularly adapted for base-ball, the disk H, Fig. 8, is mounted lower in the frame, and to alter the direction of flight of the ball, one leg of the frame is pivoted about the other. To effect this, one leg is pivotally mounted on a plate p<1> while the other slides in a slot in which it is moved by rack- and-pinion gearing operated by a spindle r<3> and wing-nut r<5>. In this form, in order to use the required length of spring G with the lowmounted disk H, the lower end of the spring is connected to the chain by a cable, while the upper end of the spring is attached directly to the tension-adjusting spindle o<1>. In order to maintain a good contact between the roller B and the quadrants C, these parts are coated with a sticky substance.