Patent GB-749096-A (GB)
Title: Improvements in accordions
Filed: 1953-12-15
Abstract: 749,096. Accordions. SCHERER, K. Dec. 15, 1953, No. 34959/53. Addition to 748,468. Class 88(2) [Also in Group V] An end closure member for the bellows of an accordion comprises a cellular structure of the type described in the parent Specification which structure is shaped so that it can be moulded between two oppositely placed mould members. As shown Fig. 1 the cellular closure member comprises an apertured top wall 27, walls 28 for the tone cells running perpendicular to the paper, and also further tone cell closure walls. running parallel to the paper, not shown. Key operated flap-valves 62 control the flow of air through the tone chambers 25 and the reed-plates 46. The cellular structure may be formed between two mould members 33, 34 as shown in Fig. 9 which illustrates both the cell walls 28 running perpendicular to the paper and the cell walls 25 running parallel to the paper. The structure may also include side closure members 35 and an obliquely inclined member 47 for supporting the keyboard, and having holes 51 for accommodating keyboard fixing members. Figs. 2, 3, 4 and 13 illustrate other suitable forms of tone cell. The tone cells 26 may be arranged in sections as illustrated by the top view shown in Fig. 5, each section containing rows of four cells running parallel to the keyboard, each section being tongued and grooved at 38, 37 to make a sort of dovetail joint. For mounting the tone plates a comb-like member 41, Figs. 11, 12, is stuck on to the ends of the cells 26, whose walls 25 are provided with V-shaped ridges 40 which fit into corresponding grooves 43 in the tongues 42 of the comblike member 41. The tongues 42 are also provided with grooves 44 opposite the grooves 43, these grooves serving to render the tongues resilient so as to maintain pressure on the oblique face of the reedplate 46 which latter is retained in position through contact with two such oblique faces and surfaces 44<SP>1</SP> of the cell walls 25. As shown in Fig. 1, slide valves 71 may be inserted between the flap valve and the corresponding opening to the reedcell for inhibiting or permitting the sounding of the associated reed. Alternatively members 67 may be operated by the button 70 so that one of them is depressed to prevent the operation of the corresponding flap valve. the linkage 64 being so designed that the operation of the opposing flap valve is not affected. Fig. 25 illustrates an alternative method of operating the flap valves particularly suitable for a tone cell structure as shown in Fig. 13. Members 165<SP>1</SP> branching from the operating lever 165 are sealed into pockets 162<SP>1</SP> of members 162 rigidly connected to the flap valves. The keys 5 are pivotally mounted on a rod 48, Fig. 17, forming with the body 49<SP>1</SP> and its projecting pieces 49 a hinge-like structure. Backwardly projecting members 50 of the hinge body pass through holes 51 in the moulded key-board mounting 47, and are provided with slots 52 for accommodating a pivoted retaining member 53. Slots 54 in the member 49 accommodate leaf springs 54<SP>1</SP> pressing on the operating member 65 for restoring it and the key 5 to its normal position. Individual mounting- arrangements for each key may instead be provided, Figs. 18, 19 (not shown).