The table following summarises the contents, names, and dates of
the patents that are listed on the label attached to Figurematic
Model 10DRX, S/N 412562. Different patents are listed on different
models, and in later years. The "description" field summarises the
main content of the patent - the official titles are often just
"calculating machine".
Patents submitted prior to January 1933 relate to mechanisms or principles from the "old-line" machines that were carried over into the Silent Speed family. Those submitted after January 1933 generally relate to new or improved mechanisms for the Silent Speed and Figuremaster lines.
| Number |
Description |
Inventor |
Submitted |
Granted |
Pages |
| 2009010 | Carriage shift | Friden | Mar 30 1927 | Jul 23 1935 | 9 |
| 2011274 | Carriage lock | Friden/Lerch | Feb 8 1930 | Aug 13 1935 | 4 |
| 2014013 | Division and complements | Avery/Lerch | Jul 15 1931 | Sep 10 1935 | 22 |
| 2022103 | Multiplier and carriage shift | Avery/Lerch | Nov 6 1929 | Nov 26 1935 | 24 |
| 2072989 | Multiplication and division controls | Lerch/Friden | Sep 3 1929 | Mar 9 1937 | 20 |
| 2117620 | Power-operated controls | Mathi | Nov 13 1931 | May 17 1938 | 13 |
| 2142892 | Division controls | Friden | Feb 6 1928 | Jan 3 1939 | 22 |
| 2148760 | Control devices | Lerch | Jun 28 1932 | Feb 28 1939 | 13 |
| 2152171 | Motor governor | Avery | May 4 1935 | Mar 28 1939 | 8 |
| 2152199 | Control devices | Machado | Jan 23 1933 | Mar 28 1939 | 10 |
| 2157411 | Adding and calculating machine | Hopkins | May 8 1931 | May 9 1939 | 51 |
| 2162237 | Polarity reversing switch | Avery | Nov 27 1936 | Jun 13 1939 | 5 |
| 2162238 | Shift clutch | Avery | Oct 4 1938 | Jun 13 1939 | 5 |
| 2200588 | Calculator with automatic division | Avery | Oct 25 1926 | May 14 1940 | 31 |
| 2211225 | Register and division | Avery | Dec 7 1931 | Aug 13 1940 | 26 |
| 2211736 | Improved calculator (Silent Speed) | Avery | Dec 18 1933 | Aug 13 1940 | 88 |
| 2216636 | Shift mechanism | Webb | Sep 26 1931 | Oct 1 1940 | 12 |
| 2216659 | Improved calculator (Silent Speed) | Avery | Jun 12 1936 | Oct 1 1940 | 78 |
| 2222164 | Improved accumulator | Avery | Jan 23 1933 | Nov 19 1940 | 14 |
| 2229630 | Calculating Machine (First Silent Speed) | Avery | Jan 23 1933 | Jan 28 1941 | 47 |
| 2255909 | Keyboard details | Avery | Oct 7 1936 | Sep 16 1941 | 4 |
| 2256799 | Addition and division details | Avery | Jul 15 1931 | Sep 23 1941 | 5 |
| 2267890 | Counter drive mechanism | Avery | Dec 18 1933 | Dec 30 1941 | 6 |
| 2270573 | Counter and complements | Avery | Apr 12 1940 | Jan 20 1942 | 45 |
| 2271240 | Improved calculator (Silent Speed) | Avery | Jun 12 1936 | Oct 1 1940 | 75 |
| 2291133 | Shift and tabulator | Avery | Dec 18 1933 | Jul 28 1942 | 17 |
| 2291134 | Division and stop | Avery | Dec 18 1933 | Jul 28 1942 | 36 |
| 2291135 | Register clearing | Avery | Jan 22 1940 | Jul 28 1942 | 16 |
| 2294948 | Shift and tabulator | Avery | Apr 29 1940 | Sep 8 1942 | 25 |
| 2294949 | Register clearing | Avery | Jan 22 1940 | Sep 8 1942 | 16 |
| 2302932 | Carriage shift | Avery | May 26 1934 | Nov 24 1942 | 25 |
| 2304231 | Carriage positioning rack | Avery/Hayes | Apr 24 1939 | Dec 8 1942 | 4 |
| 2329180 | Decimal point indicating | Boyd | Apr 18 1939 | Sep 14 1943 | 8 |
| 2333234 | Setting clutch | Boyden/Avery | May 16 1941 | Nov 2 1943 | 11 |
| 2335226 | Counter reverse | Avery | Sep 28 1930 | Nov 30 1943 | 10 |
| 2335282 | Improved shift | Jessup | Jul 6 1940 | Nov 30 1943 | 15 |
| 2339089 | Centralising device (actuator) | Martin | May 12 1942 | Jan 11 1944 | 6 |
| 2365324 | Tabulating mechanism | Avery | Jun 11 1938 | Dec 19 1944 | 23 |
| 2365325 | Clutch sequencing | Avery | Sep 20 1943 | Dec 19 1944 | 28 |
| 2366429 | Shift control | Avery | Aug 12 1940 | Jan 2 1945 | 30 |
| 2376954 | Carriage shift | Avery | Sep 6 1938 | May 29 1945 | 8 |
| 2377767 | Automatic normalising | Dustin/Avery | Apr 7 1941 | Jun 5 1945 | 31 |
| 2393018 | Automatic counter reverse | Boyden | Jul 29 1942 | Jan 15 1946 | 19 |
| 2393019 | Automatic counter reverse | Avery | Jul 29 1942 | Jan 15 1946 | 19 |
| 2400244 | High-speed multiplier | Mathi | Aug 25 1941 | May 14 1946 | 21 |
| 2428206 | New carriage shift | Dustin | Aug 4 1941 | Sep 30 1947 | 13 |
| 2462690 | Counter drive | Studley | Jun 3 1946 | Feb 22 1949 | 10 |
| 2567133 | Carriage decimal flags | Studley | Aug 27 1949 | Sep 4 1951 | 3 |
| 2583377 | Keyboard modules | Hurni | Mar 17 1947 | Jan 22 1952 | 5 |