DE1225737B - Electrical switch for testing electrical arrangements with multiple connections - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

HOIh

German KL: 21c-39/01

Number: 1225 737

File number: G 37979 VIII d / 21 c

Filing date: June 18, 1963

Opening day: September 29, 1966

The invention relates to an electrical switch for testing multiple connections electrical assemblies consisting of a first fixed part comprising a number of connecting pieces carries, a second fixed part, which also carries a number of connecting pieces, consists of an output contact piece and a movable part carrying a number of contact pieces, which is rotatable relative to the fixed parts to the contact pieces one after the other with the connecting pieces to bring in touch.

A tap changer for an electric blanket is already known, which has two fixed parts, one of which is provided with three connectors and the other with two connectors. Between these two fixed parts, which are provided with connecting pieces, there is a movable one Part arranged that carries two contact pieces, which when rotated one after the other in engagement with the connecting pieces of the fixed parts can be brought to set different heating levels.

When testing electron tubes and other electrical components, for example Transistors, you have to carry out many measurements between different parts one after the other. These parts must be connected to a measuring circuit. The invention now has the task based on a simple compact electrical switch for testing multiple connections having electrical assemblies, with the help of which the various connections easily and can be quickly switched into a test circuit.

This task is now solved by an electrical switch for testing several connections having electrical assemblies, consisting of a first fixed part, the carries a number of fittings, a second fixed part which also carries a number of connecting pieces carries, an output contact piece and a number of contact pieces supporting moving part, which is rotatable relative to the fixed parts, around the contact pieces to bring successively with the connecting pieces in contact, which is characterized in that at least one of the contact pieces in sequence with the connecting pieces on the first fixed part the output contact piece connects, while the remaining contact pieces the other connecting pieces on the first fixed part with the corresponding fittings on the second fixed part.

Electrical switch for testing several
Electrical connections having
Arrangements

Applicant:

Globe-Union Inc., Milwaukee, Wis. (V. St. A.)

Representative:

Dipl.-Ing. M. Licht, Dr. R. Schmidt,

Dipl.-Wirtsch.-Ing. A. Hansmann

and Dipl.-Phys. S. Herrmann, patent attorneys,

Munich 2, Theresienstr. 33

Named as inventor:

William A. Sefton, Grafton, Wis. (V. St. A.)

Claimed priority:

V. St. v. America July 11, 1962 (209 062)

By rotating the movable part, the connecting pieces on the first one are fixed one after the other Part connected to the output contact piece that is connected to the measuring or test circuit stands, while the corresponding other fittings of the two are fixed Parts are connected by the remaining contact pieces.

Each contact piece consists of a single strip

made of electrically conductive, resilient material which is folded in such a way that a pair of contact arms is formed. The contact arms are in the direction of the connecting pieces arranged on the two fixed parts biased. The contact pieces are at a constant distance from each other on a cylinder Limb arranged. To ensure a gradual movement of the cylindrical member, locking means are provided.

The invention will now be explained in more detail with reference to drawings.

Fig. 1 is a side elevation of the switch of the invention;

F i g. Figure 2 is a view taken along line 2-2 in Figure 2. 1 and shows the ratchet mechanism;

F i g. 3 is one on line 3-3 of FIG. 1 and shows the common contact fitting on the surface of the fixed part;

609 668/305

F i g. 4 is one on line 4-4 of FIG. 1 view taken and shows the face of the opposite fixed part;

F i g. Fig. 5 is an end view of the movable part; .

F i g. 6 is a view of the other end of the movable part;

F i g. 7 is a view of the stem building structure.

As can be seen in more detail in the drawings, the switching device 10 is at one (in FIG. 1 partially broken away) control panel 12 after inserting a shaft 14 and bushing 16 through an opening 18 is grown. A nut 20 and washer 22 are used to attach the socket the control panel. A rotary knob (not shown) is provided on the end of the shaft to turn the switch to the required positions, and a snap ring 17 holds the shaft 14 in the sleeve 16.

The switching device is provided with a detent mechanism 24 to the shaft 14 in each of the switches inevitably set the intended positions. The locking mechanism includes a front plate 26, a Spring 28, which is rigidly attached to the bushing, and a ratchet wheel 30, which is rigidly attached to the shaft 14 is. A ball 32 is installed in an opening 34 in the faceplate 26 and is supported by the spring 28 biased into engagement with the ratchet wheel 30. When the shaft 14 rotates, the ball 32 settles in one of the notches 35 on the ratchet wheel 30 and fixes the shaft 14 in a certain position.

The shaft 14 extends through the two stationary parts, a first part 36 and one second part 38, which are fastened to the front panel by means of visual bolts 40, spacer sleeves 42 and 44 are provided between the face plate 26 and the fixed parts 36 and 38, respectively. A nut 46 and a spring washer 48 sit on the ends of the bolts 40 to hold the whole thing together.

A movable part 50 is mounted between the fixed parts 36 and 38 and is attached in such a way that that it rotates with the shaft 14. A number of Sehaltteile 52 with arms 54 of equal length is with With the help of hollow rivets 56 attached to the movable part 50. The outer ends 58 of the arms are biased so that they slide on the inner surfaces of the fixed parts 36 and 38. A number of connection pieces 60 and 62 is with the same circumferential abuts on the fixed parts 36 and 38 and has contact surfaces 64 and 65 which are located on the orbit of the ends on the contact arms 54 of the movable part 50. the Contact arms 54 of the movable part 50 protrude from one another by the same distance as the connection gap 60 and 62 of the stationary parts 36 and 38, so that between the connection pieces 60 and 62 on the one fixed part 36 and which at the other 38 an electrical circuit comes about.

One of the contact pieces on the moving part is replaced by a »AbleseK-Schaltstüek 66 , which has an arm 68 of normal length and a short arm 70; this runs on a closed contact ring (output contact piece) 72 on the second stationary part 38. The closed contact ring 72 is connected to a test circuit in order to test the tube circuit which is connected to the connecting piece touched by the contact arm 68.

The movable part 50 is made of molded plastic and constructed so that the switching pieces are individually embedded in it. The contact arms are made from a single piece of material, which is folded over to form the arms and thereby to see the electrical uniformity. The folded over section of the contact piece forms a folding strip 74, which sits in a bed or groove 76 in the movable part, in order to obtain the correct one To ensure the position and rigidity of the contact pieces. The diameter of the ends 61 of the movable Part 50 are turned off exactly so that it runs in holes 63 and 71 of the fixed parts. The axial play is limited by shoulders 67 and 69 on the moving part,

The present switch is designed to test a fourteen-connector tube. At the Ratchet wheel are fourteen positions and a pair of connecting pieces 60 and 62 for each of these provided on the fixed parts 36 and 38. Thirteen pairs of these connectors are electrically connected by the contact pieces on the moving part in every position of the locking wheel. That fourteenth pair is through the "reading" holder short-circuited and connected to the full contact ring. The "reading" rcontact checks in each one Direction of rotation one after the other the connecting pieces,

When assembling the fixed parts 36 and 38, it is essential that the distance between it is precisely determined in advance to ensure contact between the connection and contact pieces to deliver. The spacer sleeves 44 between the fixed parts 36 and 38 are therefore very precisely machined in order to maintain the correct spacing. This arrangement ensures a compact switching device, the sufficient current carrying capacity has to test tubes of this size

Claims (10)

Claims .; 1. Electrical switch for testing several Electrical arrangements having connections, consisting of a first stationary Part that carries a number of connecting pieces, a second fixed part, which also has a number of connection pieces carries, an output contact piece and .einem a number of Sehaltstüeken bearing moving borrowed part which is rotatable relative to the fixed parts in order to successively contact the contact pieces with the connection pieces bring, characterized in that at least one (66) of the Sehaltstucke (52) One after the other, the connection pieces (62) on the first fixed part (36) with the output contact piece (72) connects, while the remaining contact pieces (52) connect the other connection pieces (62) on the first fixed part (36) with the corresponding connection pieces (60) on the second connect the fixed part (38). 2. Electrical switch according to claim 1, characterized in that the Sehaltstüeke (52, 66) from a single strip (54, 58, 74) of resilient, electrically conductive, folded over (74) consist of material that this forms a pair of contact arms (54) that a single (66) of these Sehaltstüeken with his one Κοητ clock arm (70) is biased to touch the output * · contact piece (72), and with his the other (68) arm is biased to a corresponding fitting (62) on the first fixed part (36) to touch, and that the pairs of contact arms (54) to the rest Switching pieces (52) are biased to corresponding connecting pieces (62, 60) to the first (36) and second (38) fixed parts to touch. 3. An electrical switch according to claim 2, wherein the movable part is a cylindrical member , characterized in that said cylindrical member has a number of grooves (76) in wears, which corresponds to the number of contact pieces (52, 66) to the latter with the connecting pieces (62) in the first and second fixed parts (36, 38). 4. Electrical switch according to claim 3, characterized in that the folded part (74) of the switching pieces (52, 66) is fastened in the grooves (76). 5. Electrical switch according to claim 3 • or 4, characterized in that the cylindrical Member contains a pressable material and that the grooves (76) radially in this member get lost. 6. Electrical switch according to one of claims 1 to 5, characterized in that the movable part (50) is supported in (63, 71) the first and second fixed parts and on each (61) of its ends has a supporting surface. 7. Electrical switch according to one of claims 1 to 6, characterized by spacing means (42, 44) to accurately determine the distance between the first and second fixed Share. 8. Electrical switch according to one of claims 1 to 7, characterized in that Latching means (30,35) are connected to the movable part (50) and that they are used to determine and compulsory definition of the position of the contact pieces on the movable part (50) with reference to the fittings on the first and second fixed parts (36, 38) serve while the movable part (50) is rotated step by step. 9. Electrical switch according to one of claims 1 to 8, wherein the first and second fixed parts are parallel to each other, characterized in that the connecting pieces (62) on the first fixed part (36) and the connecting pieces (60) on the second fixed part Part (38) equidistant on circles concentric to the axis of the movable part (50) are and that corresponding fittings are opposite one another. 10. Electrical switch according to one of claims 1 to 3, characterized in that the The output contact piece is a circular ring (72). Considered publications:
U.S. Patent No. 1894225 1 sheet of drawings 609 668/305 9.66 © Bundesdruckerei Berlin