GB600508A - Improvements in or relating to electronic calculating apparatus - Google Patents
Improvements in or relating to electronic calculating apparatusInfo
- Publication number
- GB600508A GB600508A GB2189/45A GB218945A GB600508A GB 600508 A GB600508 A GB 600508A GB 2189/45 A GB2189/45 A GB 2189/45A GB 218945 A GB218945 A GB 218945A GB 600508 A GB600508 A GB 600508A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- valves
- grid
- anode
- connected over
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
- H03K23/82—Pulse counters comprising counting chains; Frequency dividers comprising counting chains using gas-filled tubes
Landscapes
- Cash Registers Or Receiving Machines (AREA)
Abstract
600,508. Pulse counting circuits. NATIONAL CASH REGISTER CO. Jan. 27, 1945, No. 2189. Convention date, Jan. 27, 1944. [Class 40 (vi)] [Also in Group XIX] In a counting ring, a number of trigger-connected' pairs of valves are arranged with connections between the valves such that one pair only responds to a pulse applied to all the valves, priming another pair to respond to the next pulse. Valves 0-4 and 5-9 are arranged in pairs, the anode of valve 0 being connected over resistance 118 and condenser 119 to the grid of valve 5, while the anode of valve 5 is connected over resistance 107 and condenser 108 to the grid of valve 0, the grid of each valve being connected over resistance 94 to a large negative potential. The grid of valve 0 is also connected over resistance 134 to the anode of valve 4, the grid of valve 5 being connected over a resistance to the anode of valve 9. By opening the switches 88 temporarily in the screen grid leads of valves 5-9, the valves 0-4 are rendered conducting (shown by shading) prior to the receipt of a train of pulses. A negative pulse applied over terminal 105 is fed over coupling condensers to the grids of all the valves, being ineffective on the non- conducting valves 5-9. The grids of the conducting valve 1-4 are connected over resistances to the anodes of non-conducting - valves but the grid of valve 0 is connected over resistance 134 to the anode of valve,4 with the result that the grid of valve 0 is less positive than the grids of valves 1-4. The negative pulse is therefore effective in reversing the state of the pair of valves 0, 5 in preference to any other pair. The grid of valve 5, due to the connection to the anode of valve 9 has less negative potential than the valves 6-9, thereby aiding the triggering operation. By employing a switch with two arms for sensing the potential of corresponding electrodes of different valves, the state of the ring may be determined and an indicating device operated. Specification 600,503 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US600508XA | 1944-01-27 | 1944-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB600508A true GB600508A (en) | 1948-04-12 |
Family
ID=22027005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2189/45A Expired GB600508A (en) | 1944-01-27 | 1945-01-27 | Improvements in or relating to electronic calculating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB600508A (en) |
-
1945
- 1945-01-27 GB GB2189/45A patent/GB600508A/en not_active Expired
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