The Birth Of New Technology

(619)

A part, a wave or a stage, numbered once and kept across the whole book. The same number in another patent is a different thing.

(616A/B)

Two of the same, lettered: 616A and 616B.

(49a xxx 49n)

A run of the same thing from the first, a, to the last, n; the x's stand for however many lie between. Every stage is (49).

(E9a - b - c - d - E9n)

The same run written out, one letter per stage. Every stage is (E9).

(583/602a xxx 583/602n)

A run of pairs: at each stage one 583 and one 602, which go together.

Figure (8-1)

The drawing, numbered chapter-figure. A patent's are FIG. 1, FIG. 2.

(Vpp)

A quantity marked on the drawing rather than a part: a voltage, a gap, an impedance.

Where a scan was read by machine the numbers are sometimes wrong — (400 xxx 46n) is 46a to 46n — and the catalogue reads them as Meyer wrote them.