Indicating arrangement with digit total from addition or subtraction

Claim 2

An indicating arrangement for signifying a digit total upon the addition or subtraction of 2n, comprising a binary circuit including first and second conductors for receiving an energizing potential difference, a plurality of digit indicators, a + OR - 1 switch having a movable contact coupled to the first conductor, a first fixed contact coupled to all the even digit indicators, and a second fixed contact coupled to all the odd digit indicators, a first plurality of unidirectional current conducting means, each coupled in series with one of said digit indicators, a + OR - 4 switch, having a plurality of two-position switches each with a movable contact and first and second fixed contacts, a plurality of reference conductors, individually coupling the fixed contacts of said + OR - 4 switch in a predetermined pattern to said unidirectional current conducting means, a + OR - 2 switch, having a pair of two-position switches each including a movable contact and a pair of fixed contacts, means for coupling the fixed contacts of the + OR - 2 switch to the movable contacts of the + OR - 4 switch in a predetermined pattern, a + OR - 8 switch, having at least first and second twoposition switches each including a movable contact and a pair of fixed contacts, means for coupling the fixed contacts of the first two-position switch in the + OR - 8 switch to the movable contacts of the + OR - 2 switch, means for coupling the movable contact of the first two-position switch in the + OR - 8 switch to said second conductor, at least two decade indicators, both having one side coupled to the first conductor, means for coupling the other side of said decade indicators to the fixed contacts of the second one of the two-position switches in the + OR - 8 switch, and a second plurality of unidirectional current conducting means, each having one side coupled to one of said reference conductors, at least one of said second plurality of unidirectional current conducting means having its other side coupled to the movable contact of said second two-position switch in the + OR - 8 switch, and others of said second plurality of unidirectional current conducting means having their other sides coupled to said other sides of the decade indicators.

Claim 3

An indicating arrangement as claimed in claim 1 and further comprising an additional switch assembly including six two-position switches each with a movable contact and first and second fixed contacts, with the fixed contacts of the first five two-position switches being coupled to said first plurality of unidirectional current conducting means, and the movable contacts of the same five two-position switches being coupled over said reference conductors to the fixed contacts of the previous + or - 4 switch, such that said additional switch assembly now operates as the + or - 2 switch, the previous + or - 4 switch now operates as the + or - 8 switch, the previous + or - 2 switch now operates as the + or - 4 switch, and the previous + or - 8 switch now operates as the + or -16 switch, a third two-position switch included in the + or - 16 switch, previously the + or - 8 switch, a pair of additional decade indicators for signifying the decade values 2 and 3, each additional decade indicator also having one side coupled to said first conductor, means for coupling the other sides of all the decade indicators to the fixed contacts of the second and third two-position switches in the + or - 16 switch, and means for coupling the movable contacts of the second and third two-position switches in the + or - 16 switch to the fixed contacts in the sixth one of the two-position switches in the added + or - 2 switch.

Claim 4

An indicating arrangement as claimed in claim 1 and further comprising a three-position switch, operable to provide selection of on, off, and pushbutton positions, including a movable contact coupled to said second conductor, a first fixed contact representing the on position, coupled to the movable contact of the first two-position switch in the + or - 8 switch, a second fixed contact, left blank to represent the off position, and a third fixed contact representing the pushbutton position, and a pushbutton switch coupled between said third fixed contact and said movable contact of the first two-position switch in the + or - 8 switch to provide momentary energization of the indicating arrangement.

Claim 5

An indicating arrangement for signifying a digit total upon the addition or subtraction of 2n, comprising a binary circuit including first and second conductors for receiving an energizing potential difference, a plurality of digit-indicating units, a + or - 1 switch having a movable contact coupled to the first conductor, a first fixed contact coupled to all the even digit-indicating units, and a second fixed contact coupled to all the odd digit-indicating units, a first array of 10 diodes, each coupled in series with one of the digit-indicating units, a + or - 2 switch, having six two-position switches each with a movable contact and first and second fixed contacts, means for coupling the fixed contacts of the first five switches in the + or - 2 switch in a predetermined pattern to the diodes in the first array, a + or - 8 switch having three two-position switches each with a movable contact and first and second fixed contacts, five reference conductors, individually coupled between respective fixed contacts of the + or - 8 switch and the movable contacts of the first five two-position switches in the + or - 2 switch, a + or - 4 switch, having two two-position switches each including a movable contact and a pair of fixed contacts, means for coupling the fixed contacts of the + or - 4 switch to the movable contacts of the + or - 8 switch in a predetermined pattern, a + or - 16 switch, having three two-position switches each with a movable contact and a pair of fixed contacts, means for coupling the fixed contacts of the first two-position switch in the + or - 16 switch to the movable contacts of the + or - 4 switch, and for coupling the movable contact of the first two-position switch in the + or - 16 switch to said second conductor, four decade-indicating units for signifying the values 0, 1, 2 and 3, each unit having one side coupled to said first conductor, means for coupling the other sides of the four decade-indicating units to the fixed contacts of the second and third two-position switches in the + or - 16 switch, a pair of decade conductors, respectively coupled between the fixed contacts of the sixth two-position switch in the + or -2 switch and the movable contacts of the second and third two-position switches in the + or - 16 switch, and a second array of five diodes, each having one side coupled to one of the five reference conductors, the first and second of said diodes having their other sides coupled to one of the decade conductors, the thirD and fourth of said diodes having their other sides coupled to said other side of the 1-denoting decade indicator unit, and the fifth of said diodes having its other side coupled to the movable contact of the sixth two-position switch in the + or - 2 switch.

Claim 6

An indicating arrangement for signifying a digit total upon the addition or subtraction of 2n, comprising a binary circuit including first and second conductors for receiving an energizing potential difference, a plurality of digit-indicating units, a + or - 1 switch having a movable contact coupled to the first conductor, a first fixed contact coupled to all the even digit-indicating units, and a second fixed contact coupled to all the odd digit-indicating units, a first array of 10 diodes, each coupled in series with one of the digit-indicating units, a + or - 2 switch, having six two-position switches each with a movable contact and first and second fixed contacts, means for coupling the fixed contacts of the first five switches in the + or - 2 switch in a predetermined pattern to the diodes in the first array, a + or - 8 switch having three two-position switches each with a movable contact and first and second fixed contacts, five reference conductors, individually coupled between respective fixed contacts of the + or - 8 switch and the movable contacts of the first five two-position switches in the + or - 2 switch, a + or - 4 switch, having two two-position switches each including a movable contact and a pair of fixed contacts, means for coupling the fixed contacts of the + or - 4 switch to the movable contacts of the + or - 8 switch in a predetermined pattern, a + or - 16 switch, having three two-position switches each with a movable contact and a pair of fixed contacts, means for coupling the fixed contacts of the first two-position switch in the + or - 16 switch to the movable contacts of the + or - 4 switch, and for coupling the movable contact of the first two-position switch in the + or - 16 switch to said second conductor, four decade-indicating units for signifying the values 0, 1, 2 and 3, each unit having one side coupled to said first conductor, means for coupling the other sides of the four decade-indicating units to the fixed contacts of the second and third two-position switches in the + or - 16 switch, a pair of decade conductors, respectively coupled between the fixed contacts of the sixth two-position switch in the + or -2 switch and the movable contacts of the second and third two-position switches in the + or - 16 switch, and a second array of five diodes, each having one side coupled to one of the five reference conductors, the first and second of said diodes having their other sides coupled to one of the decade conductors, the thirD and fourth of said diodes having their other sides coupled to said other side of the 1-denoting decade indicator unit, and the fifth of said diodes having its other side coupled to the movable contact of the sixth two-position switch in the + or - 2 switch.

Claim 7

An indicating arrangement as claimed in claim 4 in which said means for coupling the movable contact of the first two-position switch in the + or - 16 switch to said second conductor comprises a control switch, for displacement to energize and deenergize the indicating arrangement.

Claim 8

An indicating arrangement as claimed in claim 5 in which said control switch comprises a three-position switch having a movable contact coupled to said second conductor, a first fixed contact representing the on position, coupled to the movable contact in the first two-position switch of the + or - 16 switch, a second fixed contact left blank to represent the off position, and a third fixed contact representing the pushbutton position, and a momentary energization switch coupled between said third fixed contact and the movable contact in the first two-position switch of the + or - 16 switch.