involved suspending the pins with overhead cords. In the decades preceding the introduction of fully automatic units, semi-automatic pinsetters such as the Brunswick B-1 and B-10, with a manually filled "table" similar to those of fully automatic units and operating much the same as the later units, were used by human pinsetters to speed up manual operation and assure accurate spotting. The oldest operational bowling facility in the United States, Milwaukee, Wisconsin's Holler House, which opened in September 1908, is one of the few remaining all-manually operated alleys that still uses Brunswick "table-style" manual units. Ten-pin pinsetters AMF pinspotters The AMF family of pinspotters, first marketed in 1952 are the first used in quantity in the industry. They have changed little since the mass-produced 82-30 version. There are three main pinspotter models: the aforementioned 82-30 (no longer produced, but still in common use, ever since the 1960s US bowling boom and the early career of Dick Weber); the 82-70 (prototyped in 1962, and still in production, since 1963); and the newest versions, the 82-90 and the 82-90XLI, both of which use the 82-70's general mechanical design. AMF pinspotters were originated by American Machine and Foundry and are now manufactured by QubicaAMF Worldwide. All operate generally the same way, with small improvements. The 82-30's operation and mechanics, having been significantly developed from AMF's pioneering 82-10 experimental model, which depended much on the use of suction to hold the pins in a double-sided spotting table for both spotting remaining pins and setup of new racks of pins, are quite different from the Model A, A-2 and JetBack units from Brunswick (which the AMF 82-10 pre-dated by almost a decade), with differing sweep and table designs, and especially in how the pins are handled for storage, after they got to the top of the machinery. After the bowler rolls their ball, and knocking down the pins, the ball strikes the pit cushion block. This activates the machine, which lowers the sweep to the guard position. Then the table descends and the respot cells close around each neck of the standing pins. The cells that have pins in them complete electrical circuits that send scoring information to the display, and turned on one or more of ten "pindicator" lights – pioneered by AMF in May 1953 – in an electrically illuminated triangular framed screen on the pinspotter's masking unit in front of the machine,