GB314026A - Improvements in or relating to calculating machines - Google Patents
Improvements in or relating to calculating machinesInfo
- Publication number
- GB314026A GB314026A GB18891/29A GB1889129A GB314026A GB 314026 A GB314026 A GB 314026A GB 18891/29 A GB18891/29 A GB 18891/29A GB 1889129 A GB1889129 A GB 1889129A GB 314026 A GB314026 A GB 314026A
- Authority
- GB
- United Kingdom
- Prior art keywords
- register
- digits
- entered
- relays
- digit
- 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
-
- 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
- G06F7/44—Multiplying; Dividing
- G06F7/446—Multiplying; Dividing by partial product forming (with electric multiplication table)
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Analysis (AREA)
- Computing Systems (AREA)
- Computational Mathematics (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Devices For Supply Of Signal Current (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Relay Circuits (AREA)
Abstract
314,026. Hofgaard-Remington Corporation, (Assignees of Aktieselskabet Collett & Co.). June 21, 1928, [Convention date]. Drawings to Specification. Adding and subtracting apparatus.-An electric machine having two sets of contact leads corresponding in number to the digits of a numerical system arranged as described in Specification 211,137 is provided with a single set of digit keys, a number of operation control keys, a plurality of registering devices each comprising sets of multiple contact relays with lockable armatures by means of which the current impulses may be registered and stored, and a recording device actuated by the current impulses through the registers for printing the result of the calculating operations. The item set up by depression of the keys (highest order to lowest) is stored in a register by means of locking bars associated with the armatures of the appropriate relays, and means comprising multiple contact reversing switches are provided for transmitting the amount set up in proper denominational order to the locking bars of a second register, which, for adding and subtracting operations, is connected to the first register through a set of multiple contact relays connected in parallel, the transmitting circuits, of each relay being connected up to a different actuating circuit for the locking bar armatures of the second register in such a manner as described in the above mentioned Specification, that the first relay, corresponding to digit value 1, is connected up to actuate the armature representing a value one unit higher while in the next relay the numerical difference will be two, and so on. Subtraction is effected by adding the complement, the transmitting circuits being connected by a switch device, through the operation of a subtraction control key, to the complementary circuits of the multiple relays. Transfer mechanism.-The means for effecting transfer comprises two relay-operated multiple contact switches connected in parallel and arranged in series with the subtraction switch in the transmitting circuit. Printing items and totals.-The items entered in the machine may be recorded by including in the circuit, relays serving to actuate type bars the relays being inserted in the circuit by depression of a control key. Similarly the amounts standing on the registers may be recorded by transmitting the digits registered back to the same register through a circuit in which the actuating relays for the type bars are connected. Multiplying and dividing apparatus. - In the embodiment for carrying out the multiplication process three sets of registering units, a reversing switch device, and a set of multiple contact relays connected through the leads in accordance with the units and tens figures of the partial products of the digits multiplied by themselves are provided. The first factor is entered in the first register by depression of the numeral keys and is then transmitted on depression of a control key through the reversing device to the second register. The second factor is then entered in the first register and the multiplication control key depressed to initiate the multiplication process, the partial products formed by the second factor with the digits of the first factor being transmitted step by step to the third register. In division operations the dividend is entered in the third register by the transmisson thereto of this number set up on the first register whereupon the divisor is entered in the first register. On depression of the division key the digits of the quotient are obtained by a selection process and entered on the second register. If the product of the digit selected say 9, with the two highest denominational digits of the divisor is greater than the corresponding digits of the dividend the transfer relay is energized and causes a division ratchet mechanism to perform a step movement closing a circuit for the next lower digit 8 as a multiplier and so on until a digit is reached which will have no effect on the transfer relay but will initiate the carrying out of the subtraction of the partial product formed from the dividend the process being continued automatically. Various circuits are described for ascertaining the number of digits of an item entered up at a particular moment, for correcting errors by clearing the machine of the number so entered, for optically or otherwise indicating when the capacity of the machine has been exceeded, and for effecting an approximation in the result by discarding one or more decimal places and if necessary correcting the lowest significant digit. Specification 282,582, [Class 38 (v), Electric switches &c.], also is referred to.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1876296X | 1928-03-13 | ||
NO314026X | 1928-06-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB314026A true GB314026A (en) | 1930-09-19 |
Family
ID=26316231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18891/29A Expired GB314026A (en) | 1928-03-13 | 1929-06-19 | Improvements in or relating to calculating machines |
Country Status (5)
Country | Link |
---|---|
US (1) | US1876296A (en) |
BE (1) | BE354275A (en) |
DE (1) | DE691263C (en) |
FR (1) | FR665679A (en) |
GB (1) | GB314026A (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2941716A (en) * | 1960-06-21 | Hebel | ||
US2953297A (en) * | 1960-09-20 | Riss ctal | ||
NL86376C (en) * | 1936-06-24 | |||
US2243473A (en) * | 1936-07-08 | 1941-05-27 | Ibm | Dividing machine |
DE746167C (en) * | 1937-06-28 | 1944-08-08 | Deutsche Hollerith Maschinen Gmbh | Adding machine |
DE749095C (en) * | 1942-03-21 | 1945-01-26 | Electrical computing device | |
BE481773A (en) * | 1942-07-27 | |||
US2350698A (en) * | 1943-07-15 | 1944-06-06 | Ibm | Rounding off means for calculating machines |
US2484462A (en) * | 1944-05-25 | 1949-10-11 | Gen Railway Signal Co | Airway traffic control system |
US2594960A (en) * | 1946-12-31 | 1952-04-29 | Teleregister Corp | Electrical storage and signaling system |
US2480744A (en) * | 1948-02-19 | 1949-08-30 | Ibm | Accumulator of the step by step operated type |
US2580303A (en) * | 1949-06-25 | 1951-12-25 | Ibm | Storage device for record controlled computers |
NL155348B (en) * | 1949-08-12 | Katsuji Fujiwara | CONDENSER. | |
US2651458A (en) * | 1951-01-24 | 1953-09-08 | Eastman Kodak Co | Automatic sequence-controlled computer |
DE1000618B (en) * | 1953-02-05 | 1957-01-10 | Eldi Feinmechanik G M B H | Electric sum pictures |
BE538906A (en) * | 1954-06-11 | |||
CN111240400B (en) * | 2020-01-20 | 2023-10-20 | 光子算数(北京)科技有限责任公司 | Optical division module, photonic neural network chip, chip system and optical divider |
-
0
- BE BE354275D patent/BE354275A/xx unknown
-
1928
- 1928-09-01 DE DE1928C0041882 patent/DE691263C/en not_active Expired
- 1928-09-18 FR FR665679D patent/FR665679A/en not_active Expired
-
1929
- 1929-03-12 US US346292A patent/US1876296A/en not_active Expired - Lifetime
- 1929-06-19 GB GB18891/29A patent/GB314026A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR665679A (en) | 1929-09-21 |
US1876296A (en) | 1932-09-06 |
BE354275A (en) | |
DE691263C (en) | 1941-01-29 |
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