Patent GB-178493-A (GB)
Title: Improvements in wind musical instruments
IPC: G10B3/10
Filed: 1920-12-15
Abstract: 178,493. Brindley, C. F. Dec. 15, 1920. Organ stop and combination actions; coupler actions.-An organ or like instrument having a plurality of claviers and a plurality of registers of pipes and couplers controlled by draw-stops or the like, has the following features: (a) " controllers " each controlling a permanent combination of registers of pipes and negativing, while a controller alone is operative, the previous effect produced by hand registration, though permitting a draw-stop combination to be prepared by hand for use when the negation is removed; (b) when a controller is in use, the power of odding registers by hand registration may be obtained or subsequently negatived by means of a press-button or the like; (c) further drawstops or the like may control registers giving the effect of groupings of registers, negativing, while operative, any previous hand registration or control under (a) and (b) ; (d) further draw-stops or the like may control registers giving the effect of a solo with accompaniment, negativing, while operative, all other controls; (e) when a draw-stop giving the effect of solo with accompaniment is in use, by means of further draw-stops or the like the accompaniment may be cut out and haud-registration made available in its place; (f) means are also provided for simultaneously retracting any of the draw-stops under (c), (d), and (e), which stand drawn. The ordinary draw-stops A, B, C, mounted in pneumatic boxes receiving wind by tubes 10, 12, 13 from a wind-chest 4, pertain to the upper and lower claviers and pedals respectively, and may have subdivisions as A<1> for couplers. They act through tubes as 15, 16, 17 connected each to a channel as 14a, 14b, 14c in a block N, these channels having outlets connected to individual stop mechanisms (not shown). The block N has further channels, as 14d to 14i, for the special controls. (a) The controllers G, arranged over the pedal clavier, are constructed so that depression of any one raises all the others, the pedal G<1> putting all the controllers out of action. Depression of a controller allows wind, received from the wind-chest 4 by a tube 19, to pass from a chest 18 through a tube 22 and tubes as 24. The tube 22 leads to a pneumatic 23a which on operation permits wind to pass from a wind-chest 27 through tubes as 30, 31 to the channels as 14a, 14c, in the block N appropriate to the registers controlled as a combination bv that controller. The tubes 24 connect, through the block N, tubes 34, 35, chambers 37b, 37a in a box O and tubes 41, 40 with pneumatics 6e, 6a, the pneumatic 6e causing admission of wind to a tube 43 and pneumatic 6b, thereby cutting off, for instance, the tube 12 and draw-stops B from the wind-chest 4, and the pneumatic 6a directly cutting off wind from, for instance, the tube 10 and draw-stops A. Handregistration is thus negatived. (b) Oppositelyacting buttons F, F' restore, or cancel the restoration of, hand-registration additional to the combination brought into operation by a controller G, actuation of the button F admitting wind from a chamber 48 supplied by a tube 51 from the chest 18 by a tube 49 to a. pneumatic 36a which operates a valve 39a to exhaust the tube 40 at 36, the pneumatic 6<a> collapsing and permitting wind from the wind-chest 4 to reach the draw-stop box A. Operation of more than one pneumatic as 36a could be obtained by first leading the tube 49 to a pneumatic in the distribution box M, a number of tubes being taken from the corresponding duct to channels in the block N and thence to the box O. (c) The draw-stop box I of the draw-stops giving the effect of groupings of registers receives wind by a tube 52. Each draw-stop is connected with a pneumatic as 23b in the box M, controlling tubes leading both to channels as 14b, 14c, operating stop mechanisms, and to channels as 14<d>, 14e, 14j, 14f. The channels 14<d>, 14e 14j with their connections through the box 0, negative hand-registration as previously described. The channel 14f is connected by a tube 54 to a pneumatic 6g, which by a tube 56 operates a pneumatic 6h, thus cutting off the supply of wind from the tube 19 and chest 18, and negativing the control of the controllers G and buttons F, F<1>. (d) The draw-stop box H of the draw-stops giving a solo with accompaniment, is on main wind, and each draw-stop is connected by a tube as 57 to a pneumatic as 23c controlling a duct 28c. One tube ( not shown) is led from this duct to the channel in the block N operating the solo stopmechanism. Tubes are also led from the duct 28c to the channels 14g, 14h, and thence by tubes 58. 59 to pneumatics 60a, 60b controlling tubes 65, 64 leading the channels as 14b, 14a, appropriate to the accompaniment registers. The wind passing along the tubes 65, 64 comes from a chamber 61<a> (there being one chamber for each accompaniment) filled by a tube 42 when the pneumatic 6e is expanded in cutting off handregistration. Other tubes are also led from the duct 28c to the channels 14d, 14e, 14j, 14f to negative hand-registration and the controllers G as previously described. A further tube (not shown) connects the duct 28<c>, through a channel in the block N and a tube 66 to a pneumatic 6f, cutting off wind from the supply-tube 52 of the draw-stop box I. (e) Draw-stops J negative the accompaniment registers of a draw-stop H by admitting wind by a tube as 50 (in practice, normally arranged to lead through the block N and box O) to the pneumatic 36b, exhausting the tube 41 at 36 and causing the pneumatic 6e to collapse, thus cutting off the wind from the chamber 61a. Collapse of the pneumatic 6<e> simultaneously causes collapse of the pneumatic 6b and admission of wind by the tube 12 to the draw-stop box B, thus allowing hand-registration to be substituted. (f) The press-buttons K, L, retracting any stops H, I, J standing drawn, act through a pneumatic relay operating to admit wind to a spring-pressed diaphragm connected to a plate through which pass the rear ends of the stops, the rear ends carrying buttons which coact with the plate when the stops are drawn