US2872114A - Selecting circuit - Google Patents

Description

Feb. 3, 1959 V. H. WILSON SELECTING CIRCUIT Filed Sept. 4, 1956 INVENTOR VERNE H. WILSON ATTORNEY United States Patent SELECTING CIRCUIT Verne H. Wilson, Morristown, N. J., assignor to Monroe Calculating Machine Company, Orange, N. J., a corporation of Delaware Application September 4, 1956, Serial No. 607,831 11 Claims. (Cl. 23561) The invention relates to selecting circuit arrangements and more particularly to code translators.

Binary selecting circuits in the form of relay translator circuits known as a Christmas tree or pyramid arrangement are known in the prior art. Such arrangements require relays each having a different number of armatures increasing in number in powers of two. This requires that the electrical power to operate the relays be different for the different relays or that if uniform power is suppliedfor operating each relay then power is needlessly supplied to each relay except the one having the largest power of two number of armatures. When such arrangements are used to translate from binary-codeddecimal to decimal notation eight armatures are present for the 23 binary code element relay while only of the 16 contacts associated therewith are utilized.

It is an object of the invention to provide a relay translating circuit which has uniform power requirements for each of the relays therein.

It is an additional object of the invention to reduce the number of armatures required "by any relay in a relay translating circuit.

It is a further object of the invention to reduce the total number of armatures required in a binary-codeddccimal to decimal translator.

These and other objects of the invention which will appear as the specification progresses are attained by arranging the circuits of a relay operated selective switching system for translating from binary-coded-decimal to decimal so that three armatures are required for each of four relays, each armature having at least one contact member associated therewith, and interconnecting the armatures and contact members in such a manner that an electrical circuit is closed for a different one of ten devices in response to each of the ten binary-coded-decimal inputs.

The invention will be described with reference to the accompanying drawing forming a part of the specification and in which the sole figure is a schematic circuit diagram of a relay translator according to the invention.

Referring to the drawing there is shown a diagram of a binary-coded-decimal relay type translating circuit having four input selecting relays, R1, R2, R4 and R8 corresponding to binary input conductors bearing the code weighted signals 1, 2, 4 and 8, respectively. Each of these relays has three contact arms or armatures 11, 12, 13, 21 83, referenced so that the first digit identifies the-relay by which controlled and the second digit identifies the level of the armatures with regard to the showing in the drawing. Each contact arm has two contacts or contact members associated therewith, a lower one which is contacted by the arm when the respective relay is not actuated (normally closed) and an upper one which is contacted by the arm when the respective relay is actuated (normally open). Electrical devices 10, which may comprise lamps behind numbered masks, actuating electromagnets for printing selected numeral ch racters or any other numeral indicating means for the 7 1 numerals as shown on the drawing, have one terminal each connected to a source of potential, shown as ground, and the other terminal connected to the selecting circuit. The selecting circuit connects a source of potential, shown as plus to the other terminal of one of the electrical devices thus completing the circuit for one device 10 for each setting of the relays R1, R2, R4 and R8 representing the decimal equivalent of 0-9.

The circuit paths for each of the devices 10 will now be traced. For No. 0 device 10: lower contact and armature 82, lower contact and armature 11, lower contact and armature 21 and, lower contact and armature 41 to positive potential. For No. 1 device 10: lower contact and armature 81, upper contact and armature 11, lower contact and armature 21 and, lower contact and armature 41 to positive potential. For No. 2 device 10: lower contact and armature 43, upper contact and armature 23, lower contact and armature 13, and lower contact and armature 83 to positive potential. For No. 3 device 10: lower contact and armature 42, upper contact and armature 22, upper contact and armature 12, and lower contact and armature 83 to positive potential. For No. 4 device 10: lower contact and armature 22, upper contact and armature 42, lower contact and armature 13, and lower contact and armature 83 to positive potential. For No. 5 device 10: lower contact and armature 23, upper contact and armature 43, upper contact and armature 12, and lower contact and armature 83 to positive potential. For No. 6 device 10: lower contact and armature 12, upper contact and armature 22, upper contact and armature 42, lower contact and armature 13, and lower contact and armature 83 to positive potential, or lower contact and armature 12, upper contact and armature 43, upper contact and armature 23, lower contact and armature 13, and lower contact and armature 83 to positive potential. For No. 7 device 10: upper contact and armature 13, upper contact and armature 23, upper contact and armature 43, upper contact and armature 12, and lower contact and armature 83 to positive potential, or upper contact and armature 13, upper contact and armature 42, upper contact and armature 22, upper contact and armature 12, and lower contact and armature 83 to positive potential. No. 8 device 14): upper contact and armature 82, lower contact and armature 11, lower contact and armature 21, and lower contact and armature 41 to positive potential. No. 9 device 10: upper contact and armature 81, upper contact and armature 11, lower contact and armature 21, and lower contact and armature 41 to positive potential.

It is to be understood that a switch may be included in the common line leading from the positive potential source to the selecting circuit or in the common line leading from the devices 10 to the ground potential source. This switch could be maintained open until a complete input is presented on the input conductors leading to relays R1, R2, R4 and R8. The switch would then be momentarily closed to cause actuation of one of the devices 10. Such operation will control the time of operation of devices 10 to occur only after the selecting circuit has been set up as well as control the length of time that a device 10 is operated.

It is to be noted that the connections between armatures 22 and 42 and between armatures 23 and 43 conduct in both directions. For selection of the No. 2 device is current flows from positive potential to device No. 2 from armature 23 to armature 43 while for selection of the No. 5 device 10 current flows from positive potential to device N0. 5 from armature 43 to armature 23. For selection of the No. 3 device 10 current flows from positive potential to device No. 3 from armature 22 to armature 42 while for selection of the No. 4 device 10 current flows from positive potential to device No. 4 from a armature 42 to armature 22. It is also to be noted that the circuit path for the No. 6 device 10 includes two armatures of relay ll, arms 12 and 13 and their lower contacts and that the circuit path for the No. 7 device 10 includes the same two armatures of relay 1 and their upper contacts. i

The selecting circuit described above utilizes flour relays each having three armatures. An upper contact'for one armature of each of relays R2, R41 and R5 is not used (21, 41 and 83). Accordingly, the connections to the armature and lower contacts foreach of 21, and 33 could be reversed if desired. Only lZ armatures and twenty-one contacts are here used in the selecting circuit resulting in a saving of three armatures and three contacts as compared to the prior art pyramid arrangement'fo'r binary-coded-decimal to decimal translators besides obtaining a uniformpower requirement for operation of the code responsive relays.

Although the invention has been described with a certain degree of particularity, it is understood that thepresent disclosure has been made only by way of example and that numerous changes in the details of construction and the combination and arrangements of parts'may be resorted to without departing from the spirit and scope of the invention as hereinafter claimed.

I clairnf 1. A selecting circuit arrangement for completing a single one of a number of electric circuits in response to coded information of four elements of at least two conditions, comprising four poly-position switching elements each having no more than three armatures and at least one contact member associated with each armature, said.

armatures and said contact members being interconnected so that at least one of said interconnections carries current in one direction to complete one of said circuits and carries current in the opposite direction to complete another of said circuits. it v 2. A selecting circuit arrangement tor completing a single one of a number of electric circuits in response to binary coded information. of four elements, comprising four two-position switching elements each having no more than three armatures and at least one contact member associated with each armature, said armatures and said contact members being interconnected so that at least one of said interconnections carries current in one direction to complete one of said circuits and carries current in the opposite direction to complete another of said circuits.

3. A selecting circuit arrangement for completing a single one of ten electric circuits in'response to binarycoded-dccimal information of four elements, comprising four two-position switching elements each having no more than three armatures and at least one contact member associated with each armature, said armatures and said contact members being interconnected so that at least one of said interconnections carries current in one direction to complete one of said circuits and carries current in the opposite direction to complete another of said circuits.

4. A selecting circuit arrangement for completing a single one of ten electric circuits in response to binarycoded-decimal information of four elements, comprising four two-position switching elements each having three armatures and at least one contact member associated with each armature, said armatures and said contact members being interconnected so that two or" said interconnections carry current in one direction to complete certain ones of said circuits and carry current in the 0pposite direction to complete certain other ones of said circuits.

5. A selecting circuit arrangement for completing a single one of a number or" electric circuits in response to coded information of four elements of at least two conditions, comprising four poly-position switching elements each having no more than three armatures and at least one contact member associated with each armature, said armatures and said contact members being. interconnected so that at least one of said electric circuits is completed through two armatures of one of said switching elements.

6. A selecting circuit arrangement for completing a single one of a number of electric circuits in response to binary coded information of four elements, comprising tour two-position switching elements each having no more than three armatures and at least one contact member associated with each armature, said armatures and said contact members being interconnected so that at least one of said eletcric circuits is completed through two armatures of one of said switching elements.

7. A selecting circuit arrangement for completing a single one or ten electric circuits in response to binary coded-decimal information of four elements, comprising tour two-position switching elements each having no more than three armatures and at least one contact member associated with each armature, said armatures and said contact members being interconnected so that at least one of said electric circuits is completed through two armatures of one of said switching elements.

8. A selecting circuit arrangement for completing a single one of ten electric circuits in response to binarycoded-decimal information of four elements, comprising four two-position switching elements each having three armatures and at least one contact member at ociated with each armature, said armatures and said contact members being interconnected so that two of said electric circuits are completed through two armatures of one of said switching elements.

9. A selecting circuit arrangement having four inputs and tenoutput s for connection between four conductors carrying binary-coded-decimal information and ten electrical devices for selectively closing a circuit path for one of said devices in response to the binary signal combinationonsaid input conductors, comprising four two-position switching elements each having three armatures and at least one contact member associated with each armature, said armatures and said contact members being interconnectedso that two of said interconnect-ions carry current in one direction to complete certain ones of said circuits and carry current in the opposite direction to complete certain other ones of said circuits.

10. A selecting circuit arrangement having four inputs and ten outputs for connect on between four conductors carrying binary-coded-decimal information and ten electrical devices for selectively closing a circuit path for one of said devices in response to the binary signal combination on said input conductors, comprising four two-position switching elements each having three armatures and at least one contact member associated with each armature, said armatures and said contact members being interconnected so that two of said electric circuits are completed through two armatures of one of said switching elements.

11. A selecting circuit arrangement having four inputs and ten outputs for connection between four conductors carrying binary-coded-decimal information and ten electrical devices for selectively closing a circuit path for one of said devices in response to the binary signal combination on said input conductors, comprising four two-position switching elements each having three armatures and at least one contact member associated with each armature, said armatures and said contact members being interconnected so that two of said interconnections carry current in one direction to complete certain ones of said circuits and carry current in the opposite direction to complete certain other ones of said circuits and two said electric circuits are completed through two armatures of one of said switching elements.

Reterencescited in the file of this patent UNITED STATES PATENTS

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