Anzeigevorrichtung fuer eine Kegelbahn

1,020,941. Bowling alleys. BRUNSWICK CORPORATION. Aug. 21,1962 [Aug. 23,1961], No. 32050/62. Heading A6D. Apparatus for detecting and indicating the pins remaining standing after the first ball of a frame has been bowled, comprises a deck structure mounted for movement towards and away from the floor of the alley and fitted with resilient pads 55 adapted to engage with standing pins when the structure is in its lowermost position, the pads each being formed with a recess on its upper face, containing a rigid plate 70, such that as the resilient pad is pressed upwards on contacting a standing pin, the plate is raised and thereby serves to energize an electric circuit to a corresponding indicator. The pads may be incorporated in the pinsetter deck of the alley, a suitable pinsetter structure being described in Specification 870,039 and comprising two superimposed decks, each formed with an array of apertures corresponding to a normal array of standing pins. The upper deck is arranged to be movable longitudinally of the lower deck, between pin-setting and pin-detecting positions, the holes in the decks being in register in the former position. The pads according to the present invention are fitted on the underside of the upper deck 23, one pad adjacent each aperture therein, so that the pads on the upper deck register with the holes in the lower deck when the decks are in their pin-detecting position. As shown in Figs. 5 and 6, each metal plate 70 underlies a spring-controlled plunger 77 slidably mounted in a housing 73 fixed to the upper face of the deck 23, the plunger being arranged to operate a microswitch 75 on being pushed upwards as a result of contacting a standing pin, and the switch being in circuit with an indicator. The Specification discloses two different arrangements for converting displacement of the plunger into operation of the microswitch.