SU404119A1 - DEVICE FOR ASSESSING RESPONSES OF STUDENTS - Google Patents

Description

one

The invention relates to electromechanical devices and can be used to create simple and reliable examination machines, mainly individual use, as well as games for children of school age.

There are a number of devices known, estimated, their correct answers to questions encoded by a certain position of the holes punched on special cards (punch cards).

In the majority of such devices, made in the form of examination machines, sophisticated and expensive electronic circuits using photorelays, tiratrons, etc. are used.

Also, simpler devices of a similar type are known, in which plugs or contact rods are used as the main element of the search circuit.

However, electronic circuits using photo relays, thyratrons, and relays cannot be used in their products for mass consumption because of their complexity and cost. Plug connectors and contact rods, not the entrance to the w, are organically in the design of the product, are inconvenient to handle and significantly worsen the presentation of the products. The use of contactors instead of plug connectors, mounted in the device case, is complicated by the fact that during stirring, contact,

contact with their punched card, the latter is easily damaged, especially along the edges of the holes. Contact in contact with the punch card allows you to find

touch the position of the contactor with the correct answer, which lowers the effectiveness of the test inter device. In addition, the use of plugs and contact rods, by itself, does not provide at least two

Ocenka response signals ("correct and" wrong) without the use of electromagnetic relays or electrical circuits containing semiconductors. Simplify signaling by applying a unique signal,

in which a signal appears only with a "correct answer, and an indication of" an incorrect answer is the absence of a signal, it is impractical. The undesirability of the use of an "unambiguous signal" is motivated by the fact that the absence of a signal with an "incorrect response can be perceived as a malfunction of the device and, in addition, reduces the visual effect during the operation of the product.

The aim of the invention is to simplify the design of the device.

This is achieved by the fact that the signal circuit of the search and signal unit contains two series-connected signal bulbs, one of which is bridged by a resistor, and parallel to the other light bulb is a search circuit consisting of series-connected rotating contactors equipped with separating discs and connected to punch cards.

The device ensures that when the search circuit is closed, only the signal “is correct, and if the search circuit is open, only the signal“ is wrong.

FIG. 1 shows the proposed device, a longitudinal section and a plan; in fig. 2- the same electrical circuit.

The device is mounted in housing I, in the wall of which there is a receiving slot 2 for a punched card, the position of which is fixed by guides 3 and an emphasis 4. Inside the housing are mounted two conductive plates 5, two electric bulbs 6 and 7, 2.5 each and a single pole switch and also placed the power source of the power grid, composed of two series-connected elements 9 of the type "Mars.

Four contactors are mounted in the cover of housing 1, consisting of an axis 10 and a separating digital disk 11 and a finder 12 fixed on it. There are ten holes in the disk 11, each of which has digits (from pool to ten). In the end part of the seeker 12, a spring-loaded contact 13 is placed.

The contactor is pulled down to a lower position by a spring 14, which is simultaneously a conductor. The contactors are fixed by means of a clamp 15, which enters the aperture of the divider disk 11. The height of the clamp 15 is selected so that the angular displacement of the con- nector can only be carried out in an upright position without touching the contact 13 with the surface of the punch card.

In the upper part of the housing 1 there are two color transparent plates - green 16 and red 17, as well as the start button 18 is normally open. The transparent plates can be replaced respectively with "yes," no or "right," stencils incorrectly. The light bulb 6, illuminating the green button 16 (“yes,“ correct), is constantly suspended by a resistance 19, which is approximately equal to the ohmic resistance of this light bulb.

The search circuit, consisting of four contactors and two insulated conductive plates 5, is connected in parallel with the light bulb 7 (see Fig. 2), illuminating the red plate 17 ("no," wrong).

Punched cards are made of thick paper or thin cardboard, the insulating properties of which are sufficient for a voltage of 3.5 volts.

On the front side of the punched card put the question, the correct answer to which is checked.

The answer to the question is encoded by any arbitrary number (four-digit for one question, two-digit for two questions, and unambiguous for four questions placed on one non-ref card).

In accordance with the selected code, four holes are punched on a punched card, located along the circumference described by pin 13 with coordinates determined by the position of the disk 11 on the clamp 15, corresponding to the selected digit of the code and its order.

Response codes are placed either on the card itself through the system — one correct one.

the answer and several false answers (and their codes), or on separate tables, where the possible answers and their codes are arranged in alphabetical order. Switch 8 is turned on. A punched card is inserted into the receiving slot 2 up to the stop 4, while isolating the conductive plates 5.

The examiner determines the answer and finds its code.

The code numbers are dialed on the disk 11 by aligning with the latch 15 the holes of the dividing disk opposite the corresponding figure. The disk And rotates when the contactors are turned up and fixed.

when lowering them. After that, press the button 18.

If the answer is correct, the contacts 13 coincide with the holes in the punch card and the search circuit through the conductive plates 5

closes, shuntira lambochku 7. As a result, the light bulb 7, illuminating the signal "incorrectly, does not receive the required heat, and the light bulb 6 illuminates the signal" correctly. If the answer is "incorrect, due to the mismatch of contact 13 with the hole in the punch card, the search circuit will not be closed and the light 7 will receive a sufficient channel to illuminate the signal" incorrectly. However, the light bulb 6, bypass resistance

19, will receive such a weak glow that the signal “will not be properly illuminated.

Subject invention

A device for evaluating student responses, containing punched cards and a search-sigal block, characterized in that, in order to simplify the design of the device, the signal circuit of the search and signal block contains two series of signal lamps, one of which is felt by a resistor, and parallel to another A search circuit is connected, consisting of series-connected rotary contactors equipped with separators and associated with punched cards.

IS //

Fig /

L

Irm- / i

I

eleven

| / (p a- / 7

iQ; -1a-fB 1

eight

LU