Patent GB-177833-A (GB)
Title: Improvements in or relating to automatic organs
IPC: G10F5/02
Filed: 1920-11-30
Abstract: 177,833. Wade, H., (Aeolian Co.). Nov. 30, 1920. Organ manual actions; stop and combination actions.-An automatic organ having a tracker board cooperating with a music sheet having note perforations and stop-controlling perforations comprises a number of stop combination means, each comprising a single electric contact and a set of electric contacts, individual contacts of the set being operatively connected with individual stops and being selectively adjustable into operative and inoperative positions with respect to the single electric contact. In the construction shown A, B, C, D represent four stops, each comprising a stop valve-chamber 5, a pipe-chest 6 and a valvechest 7, the chamber 5 and the valve-chest 7 normally containing compressed air. The chamber 5 is connected to the pipe-chest by a port 8, normally closed by a valve 9 connected to a pneumatic 10, and contains an electromagnet 11, which when energized, raises an armature 12, thereby through the medium of a pouch 13 and valve 16 causing the collapse of the pneumatic 10 and permitting compressed air to enter the pipe-chest. For each pipe 1 there is an electromagnet 24 connected with a corresponding note duct 27 in the tracker bar 28 through a pair of pneumato-electric contacts 29. The corresponding pipe of each stop is similarly connected to the same note duct. When an electromagnet 24 is energized the armature 31 is raised, causing the collapse of the pouch 25 and thereby the collapse of the pouch 23 thus opening the valve 20 and allowing air to enter the pipe 1. In addition to the note ducts on the tracker bar, extra ducts are provided corresponding to stop perforations in the music sheet of which three rows 34a, 34b, 34c are shown. The duct corresponding to a stop perforation 34a is connected through a pair of pneumato-electric contacts 36a to a valve-box 37a which is in communication with a stop combination-box 38a. Each duct corresponding to any row of stop perforations is similarly connected to a corresponding valve-box and stop combinationbox. The valve-box 37a contains an electromagnet 39 in circuit with the pair of contacts 36a and adapted, when energized, to cause the collapse of a pneumatic 41 to which is pivoted a rod 54 slidably supported in a vertically-yielding guide 55 and adapted to strike against one of the inclined sides of a pivoted member 50. This member is connected by a link 57 to a pair of valves 45, a spring 58 tending to keep the valves raised. Each time the pneumatic 41 is collapsed it causes the member 50 to turn about its pivot in the reverse direction to that taken as the result of the previous collapse. The valve-box 37a is connected by a tube 59 to stop combination-box 38a containing a pneumatic 47 provided with a single electric contact 64a and an insulated block 61 provided with a number of electric contact wires 50. The wires in any desired selection may be located in spaces between the teeth of a comb 62, Fig. 4, this being the active position, or they may be bent downward and located between notches 63 formed in the teeth. Fig. 1 shows, by way of example, an arrangement by which the stops A, B, and D may be operated by means of ducts in the tracker board corresponding to the row of stop perforations 34a. The single contact 64a is connected to the current source and thence to one terminal of each electromagnet 11 in the stops A, B, and D, the other terminals being connected one to each of three wires 60, located in active position. When a stop perforation 34a crosses the tracker bar the pneumatic 41 is collapsed momentarily, operating the valves 45 into their downward position where they remain until the second perforation 34a passes over the tracker bar. During this interval the pneumatic 47 is collapsed making contact between the single contact 64<a> and the three wires 60 and thereby bringing into operation the stops A, B, and D. When the second perforation passes over the tracker bar, the valves 45 are raised and the pneumatic 47 opens, throwing the stops A, B, and D out of operation. Similarly all the stop perforations in conjunction with corresponding stop combination-boxes may be utilized to operate the stops in various desired combinations.