GB591680A - Improvements in or relating to electrically operated calculating equipment - Google Patents
Improvements in or relating to electrically operated calculating equipmentInfo
- Publication number
- GB591680A GB591680A GB1105145A GB1105145A GB591680A GB 591680 A GB591680 A GB 591680A GB 1105145 A GB1105145 A GB 1105145A GB 1105145 A GB1105145 A GB 1105145A GB 591680 A GB591680 A GB 591680A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- bank
- relays
- magnet
- storage
- 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
- 235000019764 Soybean Meal Nutrition 0.000 abstract 2
- 229910002056 binary alloy Inorganic materials 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 230000001429 stepping Effects 0.000 abstract 2
- 230000002441 reversible Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/40—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using contact-making devices, e.g. electromagnetic relay
- G06F7/42—Adding; Subtracting
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/40—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using contact-making devices, e.g. electromagnetic relay
- G06F7/405—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using contact-making devices, e.g. electromagnetic relay binary
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electromagnetism (AREA)
- Computational Mathematics (AREA)
- Computing Systems (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Relay Circuits (AREA)
Abstract
591,680. Electrical calculating- apparatus. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and BAKER, G. T. May 2, 1945, No. 11051. [Class 106 (i)] Electrical calculating apparatus comprises a rotary stepping switch in which the wipers of the switch are adapted to transfer the setting of a group of storage relays to a group of common relays which thereupon control the setting of the storage relays to a different value. Embodiments are described for addition and subtraction on the binary scale, multiplication and division on the binary scale and addition on the denary scale. Fig. 1 shows a storage relay of the type used in all the embodiments. Connection of lead A to battery energizes relay UR which locks up over contacts UR1 until the lead A is earthed when the relay releases. Relays of this type, representing numbers on the binary system, are connected to successive contacts of banks S1, S2 of a rotary stepping switch, Fig. 2, the relays S1 acting as a counter and the relays S2 as entry storage means. Energization of a magnet P energizes magnet SM which releases magnet P to advance the uniselector one step. In each order, when the effective contacts of banks S1, S2 are connected to operated storage relays, relays A, B energize over their upper windings and if there is a carry from a lower order, relay C is also energized. When relay P operates, wipers S1, S2 are disconnected from relays A, B, Wiper S2 is earthed to shunt down its associated storage relay, and depending on the sum, wiper S1 is connected or disconnected to battery or earth to energize or de-energize its relay or leave it in its existing state. In the case of carry to the next order, relay D operates and prepares a circuit for relay C when relay P releases to step on the uniselector. Subtraction. Reversal of contacts SUB prepares the circuit for subtraction. With a larger capacity than is required, a negative answer is indicated by the operation of the highest relay. Multiplication. Two two-bank uniselectors SA, SB are used, the multiplier and multiplicand being entered on banks SA2, SB1 and the product being obtained on SA1. The process involves a cycle for each operated relay in the bank SA2, the number in the bank SB1 being added into the bank SA1 with appropriate binary denominational shift. The magnet SAM is operated at each operation of magnet P, but the magnet SBM is operated after the first step only when relay SW operates, i.e. only when a significant digit occurs in bank SA2, whereby the appropriate lead is given to uniselector SA. When the uniselectors reach an operative contact in bank SA2, relay SW operates to operate magnet P, magnets SAM, SBM energize to release relay P and the two uniselectors step together. Contacts P2 connect earth to SA2 to shunt down the operated storage relay in that bank, while relay ON energizes to disconnect the wiper SA2 so that the remaining storage relays in that bank have no further control during the cycle. The number on bank SB is now added into bank SA1 in the same manner as in Fig. 2 except for the denominational shift. The process is repeated for each operative relay in bank SA2, the uniselector SA gaining one or more steps each cycle. Division. Division can be performed if the wiper SB starts several steps in front of the wiper SA, losing one step in the home position each cycle. When subtraction of the divider leaves a negative dividend, zero is entered in the appropriate order of the quotient and the divider is added in the next lower order. This produces a short division. Further apparatus (Figs. 4 and 5, not shown), is described for performing addition on the decimal scale, each denomination having four storage relays arranged on the binary system and connected to the contacts of a uniselector, each fifth contact of which is arranged to control carry-over from one denomination to the next. The circuit is based on that of Fig. 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US661590A US2552760A (en) | 1945-05-02 | 1946-04-12 | Binary calculator |
Publications (1)
Publication Number | Publication Date |
---|---|
GB591680A true GB591680A (en) | 1947-08-26 |
Family
ID=1705127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1105145A Expired GB591680A (en) | 1945-05-02 | 1945-05-02 | Improvements in or relating to electrically operated calculating equipment |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB591680A (en) |
-
1945
- 1945-05-02 GB GB1105145A patent/GB591680A/en not_active Expired
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