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of John Martin Wolfskill V.P. Engineering, W3QKT |
Below is a partial list of the patents of John M. Wolfskill. In total, he achieved 29 patents during his 37-year tenure with Blileys from 1934 to 1971. Of these, there were two of which he was the most proud in his 1979 interview with Charles A. Bliley, the "overtone" crystal (2,157,808) and the "resonant-pin" holder (2,240,453). Items with a hyperlink are posted on this Web site for you to view.
A group of six patents relating to the invention and application of variable-frequency crystals, and associated oscillators, are collectively discussed on this site on another patent page.
NOTES:
PATENT |
DESCRIPTION |
ISSUED |
APP. NO. |
2,079,540 |
Variable Frequency Holder (VF1) |
5/4/37 |
98,431 |
2,157,808 |
Harmonic 19° Cut (Overtone Crystal) |
5/9/39 |
38,134 |
2,163,742 |
Thyrite
Protecting Device-- |
6/27/39 |
200,529 |
2,213,031 |
Low Frequency Bar; 42° - 55° Cuts |
8/27/40 |
200,980 |
2,224,700 |
Curved Crystal Application (Variable-Frequency) |
12/10/40 |
313,462 |
4/29/41 |
313,463 |
||
2,240,450 |
Beat-Frequency Oscillator -- "Super Vari-X" |
4/29/41 |
316,269 |
2,240,451 |
Clamped Type Holder |
4/29/41 |
331,050 |
4/29/41 |
337,698 |
||
2,240,453 |
Resonant Pin Holder |
4/29/41 |
343,468 |
2,256,931 |
Harmonic Oscillator Circuit ("multiplier") |
9/23/41 |
296,676 |
9/23/41 |
313,461 |
||
2,284,968 |
Restrained Holder MS-43 |
6/2/42 |
409,887 |
2,289,950 |
Resonant Button |
7/14/42 |
390,830 |
2,345,648 |
Sand-Blast Lapping |
4/4/44 |
390,829 |
2,364,501 |
X-Lap (Etch-to-Frequency) |
12/5 /44 |
386,938 |
2,467,353 |
Harmonic Cut 30° |
4/12/49 |
256,781 |
2,479,286 | X-Lap (Etch-to-Frequency)--Process Refined | 8/16/49 | 564,533 |