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Here are some "how to assemble the thing" drawings I did around 1984/85. I have left these crude sketches mostly as originally drawn. Some of the parts may have different numbers in these sketches but they are all easily identifiable by their shapes. |
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drawing 1; beginning the assembly process, the piezo driver discs are inserted into the coil-formers... |
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drawing 2; the terminal crowns are pushed home into the coil formers, snap-connecting in the p.t.f.e moulding and resting in contact with the silvered piezo terminal surface... |
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drawing 3; coil number 1 winding begins, interleaved with p.t.f.e. tape;- when full, the bobbin is completed by passing the string under the piezo inside terminal surface... |
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drawing 4; coil number 2 begins in reverse order to coil number 1; in the modified version (1985), a spiral groove was considered to assist in the even coil winding process... |
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drawing 5; self explanatory, I think... |
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drawing 6; a degree of practised skill is required here to leave an unwound length of string available to pass through the assembled machine to act as the speaking length; the collets (7) are paired up to grip the string and inserted into the terminal crowns... |
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drawing 7; the string emerges after being passed through the coil former; the collets (7) now firmly anchor one end of what will become the speaking length... |
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drawing 8; both coil formers have their inner coil-contacting (7) parts inserted along with the spacer rings... |
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drawing 9; stators (7) inserted... |
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drawing 10; the jack is mounted upon the loose string, passed through the cylinder block and the coils are brought together, ready to snap-connect with the assemly... |
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drawing 11; nearly done... |
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drawing 12; two more collets are pushed in as the string is drawn hand-tight and in one (again skill-practiced) movement, snapped off by a sharp downward jerk... |
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drawing 13; the control loop is added, being attached via tightening down of the finger-nuts... |
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drawing 14; pressure adjustment mechanism is assembled... |
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drawing 15; ready for priming! |
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