SU813172A1 - Automatic piano-key switch tester - Google Patents

Description

(54) AUTOMATIC KEYBOARD CONTROLS 381 switch, slit; in fig. 3 - control unit diagram. The machine consists of a drive I, the speed of which should be adjusted in accordance with the required performance of the machine, the multi-position turntable 2, the switch sensor 3, the scanning mechanism (device) 4 and the control unit 5. On the turntable 2, there are terminal blocks 6 and a brush unit 7 that commutes the terminal block while it is in the position of the sensor switch 3- The raster 4 consists of a box 8 containing receivers 9, 10 and C. The first of they are designed to receive a push force reduction, the second is a switching fault and third-third switches. The receiver 9 is closed by a shutter 12 associated with an actuator (device) 13, which is an electromagnet. Receiver Yu is closed by a shutter 14 connected to an actuator (a device by the solenoid electromagnet. Receiver 11 is always open. Sensor switch 3 (see Fig. 2) consists of right and left racks 16 and 17 carrying a switching mechanism, namely, calibrated loaded pushers 18 and 19, presets in the form of cams 2O and 21, and electric remote contacts 22, 23, 24 and 25, 26, 27. From the given contacts, conclusions 28, 29, 30 and 31, 32, 33, respectively, were made. should also include a terminal block 6, carrying on itself tested keyboard switch Tel 34 Six pins 35 from the terminal block, pads 6 are connected to the control unit 5 (see Fig. 1). Similarly, pins 28, 29, 30 and 31,

32, 33 from the switch sensor, as well as pins 36 and 37 from the actuators 13 and 15, are connected to the control unit 5.

The BLOTS 5 control (see FIG. 3) consists of a switching device. 38, a driver of 39 switching pulses, a counter 40, memory elements 41 and 42, a comparator 43, reject counters 44-46, commutation, force reject, suitable products, respectively, and indicators 47 and 48.

The proposed device works as follows. A tested switch 34 from a boot device (not shown) or installed in terminal block 6. When the switch turns the switch 39 and,. in the case of filling the counter 4O, falls into the element 41. In this case, the left input of the comparator 43 also shows a high level.

(l), and matching 46 good products will also work. Otherwise, the counter 44 and the indicator 47 fault on switching. Actuators 13 and 15 are triggered simultaneously with counters 44 and 45. Thus, when a failure occurs in amplification, the flap 12 opens, and the key reset in the reset position, falling into the tray 8, falls into the receiver 9. Similarly

defect on switching, enters the receiver 10, and suitable, the products bypass both of these receivers, since the flaps 12 and 14 are closed, and enter the receiver 11. in the zone of the switch-sensor 3, the last one starts to work, i.e. Perform a specified switching cycle, for example, three switches and two returns to the starting position. If switch 34 is three-way, i.e. has a middle position, the number of switches is more. IF with this switching force on the pusher 18 is within the specified limits, then the contact 23 will move away from the contact 22, but will not close on the contact 24. If the product turns out to be a weakroll switch, then these contacts will not open at all. If the product is a fault due to excessive switching force, then contacts 23 and 24 are closed. The process on the pusher 19 and on contacts 25, 26 and 27 is similarly proceeding. The corresponding signals along the line 28-33 come to the control unit. The switching information each time switching through the brush unit 7 to the switched outputs of the switch under test in the form of voltage pulses follows the leads 35 into the control unit 5. In the latter, the pressing force signal from the switching device 38 enters directly into the memory element 42, since this does not require counting the number of key presses. If the force is normal, the true input of the comparator 43 will be high (1), if not, the voltage (O) level is low. In the first case, the counter 45 is an effort marriage. will not work, in the second - will work. The signal of a combination, also of a relay nature, from the switching device 38 will go to the formation of the shaping device in the form of a box-shaped tray with three successive receivers, two of which are equipped with a controllable flap, significantly simplify the design of the wall and narrow the service area to one tuzishsh, and to the control unit, on the two memory elements, each connected to its own input of the comparator, it is possible, without loss of the opportunity, to distribute the unsuitable product by the form To control in two ways and increase productivity. Performing a switch sensor with a setting cam in the form of a flat-profile cam provides, with a simple design, the versatility of the stand for two- and three-position switches and a different number of switchings. claims I. An automatic device for controlling current-effect key switches for switching and switching, comprising a drive, a multi-turntable, a rotary table, a date switch, a sorting mechanism and a control unit, which, with to simplify the design of the machine and increase productivity, it is equipped with actuators, the grading mechanism is made in the form of a box-shaped tray with three successive receivers, two of which are equipped with a damper, each damper.connected with one of the executive mechanics Yuv. 2.Automatic machine according to clause I, which is used so that the control unit contains a pulse shaper, a counter, two memory elements with the said actuating mechanism at the output of each and a comparer, the outputs of which are included in two inputs mentioned memory elements. 3.Automat on PP. t and 2, which means that the sensor switch contains a terminal block, a switching mechanism, remote contacts and a setpoint controller, made in the form of a flat-profile kupachka. Sources of information taken into account in the examination I. French Patent No. 2247718. CL. 6 01 M, 1975. jgiii- | i-im us. l / J /, J2,3J JT) I IJ, ® / e 2 S8. 9.aa

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Claims (3)

Claim I. Automatic machine for monitoring current key switches by switching force. and switching, containing the drive, multi-position turntable, date 6 chick-switch, sorting mechanism and control unit, with the fact that, in order to simplify the design of the machine and increase 5 of labor productivity, it is equipped with actuators, the screening mechanism is made in the form of a box-shaped tray with three receivers in series, two of 10 of which are equipped with a shutter, each of the shutters being connected to one of the actuators. 2. An automaton in π. 1, due to the fact that the control unit 15 holds a pulse shaper, a counter, two memory elements with the said actuator at the output of each and a comparator, at the two inputs of which the outputs of the mentioned memory elements are included. 3. The machine according to claims. 1 and 2, which includes the fact that the sensor — switch contains a terminal block, a switching mechanism, remote con- 25 beats and a dial made in the form of a flat-profile cam.