DE2310162C3 - Electrically readable decimal roller counter - Google Patents

Description

The invention relates to an electrically readable number roller counter according to the preamble of claim 1

In DE-PS 12 45 622 an arrangement for binary sub-coding of decrinal digits is described. A coding disk is used here, whose Contact surfaces are arranged on one of a single sliding contact overrun ring grinding track. Four coding outputs are assigned to the contact surfaces, each with a part of the contact surface in conductive connection, the required connections corresponding to the selected code. at this arrangement, the wiring is relatively difficult, especially with the numbers where several contact surfaces have to be detected by the grinder at the same time. The contact surfaces must if they are not connected to the same conductor path, be electrically separated from each other, which makes difficulties because of the limited expansion of the sliding contact. For counters that are to be automatically reset to zero this coding arrangement cannot be used since it is always an intermediate value between two coding fields the value zero is registered.

In the register counter according to DE-GM 19 26 472 coding disks are used, which on have four concentric tracks with spring contacts interacting contact surfaces and one have a central connection for a resulting voltage. This arrangement has the disadvantage that the Coding disks must have a relatively large diameter in order to ensure proper functioning.

The aim of the invention is to improve the above-mentioned counter with regard to its coding device to such an extent that a complicated line routing for the contact surfaces is avoided and that the contact surface arrangement can be designed advantageously with the least amount of coding tracks while avoiding intermediate zero values. According to the invention , this object is achieved with the features of the characterizing part of claim 1. The features of claim 2 describe an advantageous development of the invention.

The invention is explained in more detail with the aid of the drawing

F i g. 1 is used to explain the binary coding, while in 2 shows an example of an inventive

ίο coding disk is reproduced

F i g. 3, 4 and 5 show various possible variations in a schematic representation.

The representation of a decimal number in binary code can be done with a coding disk according to Fi g. 1 make it come true.

The coding disk is divided into four ring tracks 10, 11, 12, 13, which are covered in a certain way with contact surfaces. The outer web 10 has the valency 2 ° = 1, the web 11 has the valency 2 '= 2. while the webs 12 and 13 the valences 2 ² = 4 or 2 ³ = 8 are assigned. The individual tracks are scanned with the aid of sliding contacts, which are designed as contact pins 10 ', 11', 12 'and 13'. A contact pin 14 'is connected to a central contact surface 14. The individual con tact areas, which in the drawing are circular arcs or are hatched radially, are in conductive connection with each other and with the central contact surface. If a voltage is applied to the central contact pin 14 'via a corresponding supply line

w sets, this tension occurs depending on the position of the Coding disk also on the output lines connected to the contact pins 10 'to 13' Contact area distribution accordingly. In the position of the coding disk shown, the con IV clock pin on a contact surface, so that, therefore, only the line connected to this pin, corresponding to the value 2 ¹ = 2, voltage has in handoff of the encoder disk to a Dezimalziffernschritt reach the contact pins W and IV Kontaktflä chen, so that now two output lines, namely the with the valence 2 ° and 2 'have voltage, which corresponds to the decimal number 3

Since the scanning of the in F i g. 1 shown coding disk when reducing its diameter on the size of the number roller of a roller counter makes difficulties, are each according to the invention two tracks are pushed into each other, which is achieved by halving the contact surface width and offsetting the Contact surfaces of the respective second web is possible.

In the arrangement according to FIG. 2 represent the arc-shaped hatched fields of the outer path Contact areas with the valency 2 ° = 1, while the radially hatched fields represent the valency 2 '= 2 to have. The fields of value 2 are by half Decimal digit step offset against the value I, so that in this way all contact surfaces are accommodated without overlapping. On the inner track, the fields with the value 2 ² = 4 are hatched in the shape of a circular arc while those with the

μ valence V = 8 have radial hatching. The contact areas of the valency 2 ⁱ are shifted by 4 '' decimal digits compared to those of the valency 2 ^2. The contact pins 10 ', 11', 12 'and 13' are offset in accordance with the displacement of the contact surface arranged. In the illustration according to FIG. 2, the coding disk is in the zero position, i. H. to the There is no voltage on the output lines. As you continue to turn the coding disc by one at a time

whole decimal digits are the individual Decimal numbers as in the arrangement according to F i g, I in the binary code through voltages on the output lines shown When the coding disk is switched on, however, the contact pins also pass over ". Contact areas that do not belong to your coding track. This results in intermediate values that are not registered, since only when the coding disk is stationary is queried, however, there may be difficulties with automatic resetting of the coding disc come when the value 0 is registered as the intermediate value. With automatic reset, the The coding disk will stop if the real zero value has not yet been reached, but the contact pins sweep over an intermediate zero value. ι ■>

3, 4 and 5 explain how the individual contact paths must be offset from one another so that no intermediate zero values or only intermediate zero values occur at harmless points between the numbers 0 and 1 or 9 and 0. For the sake of clarity, the individual tracks are shown separately. The numbers under the tracks indicate the values obtained in each position, whereby the lower row supplies the intermediate values Contact pin 13 ', which is to ^{deliver the value 2 3} , comes to stand on a contact surface of the web for the value 2 ^2. So it will be an intermediate value of 7? = 8 obtained, since the pins 10 ', 11', 12 'remain on fields free of contact surfaces with half a decimal digit increment. The intermediate value between 1 and 2 is 11, since the contact pin 13 ' comes to rest on a contact surface of the web for the valency 2 ¹ , the contact pin II' dip the first contact surface of the web for the valency 2 ° and the contact pin 10 'the first Contact surface for the path of grade 2 ¹ reached With this contact surface arrangement according to FIG. 3, which according to FIG. 2, the intermediate values are different from zero.

In the case of the contact surface arrangement according to FIG. 4 becomes just an intermediate value 0 between the numbers 0 and 1 obtain. Such an arrangement can be advantageous in the case of automatic resetting of the coding disk, if there is a risk of being caused by the moment of inertia the disk one more rotation by half a decimal digit when it reaches the zero position he follows. In the case of a zero intermediate value between 0 and I, a The reset mechanism is switched off. Whether the contact area distribution according to Fig. 3 or the after F i g. 4 is to be used, depends on the mechanical conditions of the system.

In the case of the contact area distribution in FIG. 5 is a Intermediate zero value only available between the 9 and 0 digits. This arrangement is equivalent to the according to Fig. 3, since the zero intermediate value can never be assumed when the number roller is reversed, because the number roll doesn't go beyond 9.

The arrangement according to the invention is particularly advantageous because the coding disks with a relatively small diameter can be made. All contact surfaces are connected to one another, so that the problem of the wiring is very simple The wiring to the five contact pins is also relatively easy.

For this purpose 3 sheets of drawings

Claims (2)

Patent claims: 1. Electrically readable decimal number roller counter with coding disks having contact surface arrangements, attached to the number rollers, with sliding contacts for binary Coding of the decimal digits of the counter cooperate, characterized in that of the four contact surface arrangements of the binary coding two value places on one common circular ring are arranged offset from one another in the circumferential direction and each Value digit is angularly assigned to the first or second half of the circular ring sector assigned to a counting step, and that two of each of the binary Sliding contacts assigned to value points in a corresponding angular offset of one of the two Scan circular rings. 2. Readable counter according to claim t, characterized in that the offset of the Orbits is chosen so that the intermediate values resulting from half steps are different from zero or the zero occurs as an intermediate value at most between the numbers 0 and 1 or 9 and 0