US2148824A - Selector - Google Patents

Description

I Feb. 28, 1939. D. L. LIENZEN SELECTOR Filed Feb. 2, 1937 IBO Patented Feb. 28, 1939 UNITED STATES PATENT foreros SELECTOR Application February 2, 11937, Serial No. `123,732 In Sweden February 55, 19.36

6 Claims.

My invention relates to selectors for automatic telephone systems or the like. In such selectors each group or frame in the selector multiple is usually provided with a separate conductor for marking `the group hunted for. Said arrangement involves certain inconveniences consisting, for instance, therein that the wipers of the selector, when Yhunting for a certain conductor in the multiple, must be advanced an extra step before the subscribers multiple proper can be reached. The invention has for its object to eliminate said inconveniences .and consists substantially therein that the driving mechanism for effecting the first setting movement is in such a driving .Connection with a further set of Wipers adapted to be set in one direction, that during the first setting movement of the selector the latter wiper set moves over a bank of contacts associated therewith. Since the conductors provided for hunting up the desired group are brought together to forma special group multiple, the latter can be made in the same manner r as the subscribers multiples or frames, thereby smplying the manufacture. The wipers for the group multiple are of the same construction as the Wipers for the subscribers or line multiple.

The invention will now be described more in detail with reference to the accompanying drawing which illustrates the invention as applied in a selector having movements in two directions which are perpendicular to each other, and in which the subscribers multiple consists of blank wires.

Fig. l. is a perspective View showing an embodiment of the invention in axially set position. Fig. `2 is a detail of the arrangement according to Fig. l.

Referring to the drawing, the reference numeral I designates a base plate on which a shaft 2 is journalled in bearing brackets 3 and 4. The shaft 2 serves as an axial slide for a tube 5 thread thereonto, said tube being provided at one end with axially extending teeth 6 provided with transverse slots forming peripheral teeth l.

The tube is axially displaceable under conn trol of an eletromagnet 8 having an armature 9 connected with a driving pawl It which upon energization of the magnet rotates a stepping Wheel II and a gear wheel I2 coupled therewith, said latter Wheel being in engagement with the transverse slots or teeth I of the tube 5.

The tube 5 is rotatable under control of an electromagnet I3 the armature I4 of which, on energization of the magnet, engages the teeth 6 by means of a driving pawl I5 so as to rotate the tube. When the magnets 9 and I3 are deenerg-ized the driving pawls 1I!) and I5 are `in known manner .drawn out of lengagement `with the stepping ywheel irl and the teeth 6 respectively. For retaining the ltube 5 in the set axial position and 5 in the set rotary position there are provided spring actuated 4holding detents I6 and Il which engage the stepping wheel II and the teeth 6 respectively. `Secured tothe tube 5 is a coupling pin fiS which engages li-n an axial slot I9 on the 10 shaft 2, so that .the shaft wil-l always follow 'the Ytube 5 during the rotary movement of the latter. .0n .one of the bearing brackets 3 is arranged a lspring housing -for a Vspiral spring ZfI wh-ich at one end fis secured to the spring housing and 15 at the other end to the shaft 2. The spring 2| is tensioned when the electromagnet I3 rotates turbe 5 by ymeans of the teeth 6.

Under lthe gear wheel `I2 (see Figure 2) is arranged a gear wheel 23 provided with a seat for 20 a helical spring 22. The function of the gear wheel 23 will v.be explained below. The stepping wheel i-I forms together with the gear wheels I2 and 23 Va unit in which one end of the spring 22 is secured. The other end of the spring 22 25V is secured in an adjusting Washer 24 which by means of a screw 25 can be locked in any desired position after the spring has been tensioned. The unit II, I2, 23 is journalled on a pivot 26 secured to the base plate I.

At the end remote from the teeth 6 the tube 5 is provided with gear wheels 21 xed onto hubs 2t which are rigidly secured on the tube 5 and act as coupling members for the wiper mounti-ngs or holders causing the latter to always fol- 'low the tube 5 during the axial displacement of the latter. The gear wheels 27 are in engagement with teeth 25 on the wiper holder 30 which carries two pairs of wipers 3|, 32 for making contacts with certain conductors in a multiple 40 33, 34. For restoring the wipers 3I, 32 after displacement in an axial and in a radial direction in res ect to the shaft 2 there is provided an electromagnet 35 the armature 36 or" which, on energization of the electromagnet, actuates the detents I6 and I 'i respectively by means of arms 3'! and 38 so that said detents are moved out of engagement with the teeth S and the stepping wheel I I respectively. The shaft 2 is then initially turned back by the spring 2l, the tube 5 50 being then rotated restoring the wiper holder 3Q together with the wipers 3I, 32 the latter breaking the contacts with the wires of the multiple, whereupon the spring 22, see Fig. 2, turns back the gear wheel I2 which then moves the tube 5 65 axially on the shaft 2 back to its original position, whereby the wiper mounting and the wipers are brought back to their starting positions.

After they have left the multiple the wipers 3l, 32 in each pair are held apart by insulated pins 6i, 62 supported by a light holder 63 which is journalled on the tube 5 and follows the axial movement of the latter only.

On the base plate I there is displaceably arranged a wiper holder 39 provided with a rack 4i) which is in engagement with the gear wheel 23.

The wiper holder 39 carries a pair of wipers 4| Y which cooperate with a group of contacts 12. Evidently said wiper holder moves only when the electromagnet 8 Voperates for effecting an axial displacement of the wiper holder and when the tube 5 is restored axially, and consequently i-t serves to hunt for the wire or wires in the group of contacts 32 which correspond to a certain Vgroup of lines in the multiple proper.

For controlling the starting positions and the extreme positions in both directions of selector movement there are provided a number of switches for the electrical connections. One switch 3d is actuable by a bar d5 provided with an elongate-d slot i6 through which a screw i? is screwed into the base plate l so that the bar can move axially. Said bar is provided with a pair of turned-up portions t8, i9 positioned in the path of movement of the holder 63 and actuated by the latter during its axial movement. There is also provided on the bar an insulated pin 5D which on axial movement of the bar actuates the contact springs in the switch lili for changing the circuits.

Reference numeral 5l designates a switch which is also divided into two groups, one for the initial part ofthe rotary movement of the shaft 2 and one for the final movement thereof. On the shaft 2 are positioned two insulating washers 52 and 53 which are adjustable individually so that they can be adjusted to actuate the appertaining contact spring group at the right moment.

For the operation of automatic switching members of the above indicated kind there are required, as is well known, a number' of relays the circuits of which can be connected to the driving magnets or restoring magnets respectively of the selector in a number of diiferent ways depending upon the particular duty of the selector in the automatic switching system.

For eiecting the connections to the pair of wipers 3l, 32 there is provided a cord 5d having four insulated conductors which follow the wiper holder 3B both during its-axial and radial movements.

For connecting to the pair of wipers di there is provided a cord having two insulated conductors which follow the wiper holder 3Q during the ingoing and outgoing movements of the latter.

In the drawing the multiple 33, 3d is shown as a i-wire multiple but it can, of course, be built both with a greater and with a smaller number of conductors. The group 33 contains l0() a-wires and 100 Zi-wires for talking connections, and the group 3l?. contains the same number of testing and call metering wires, in this specication called cand d-wires. The wires of the multiple are held together by insulating disks, 22 wires being provided in each layer. Such a layer contains 10 aand b-lines or 10cand d-lines. The two remaining wires in each layer are usually used for markings of various kinds.

It is of course also possible to displace the wiper holder 39 in the direction of the first setting movement of the rod 5. In this case, however, the distance between the wires of the group multiple must be equal to the distance between the rows of wires in the subscribers multiples.

In case, as shown on the drawing, the wiper holder carries pairs of wipers which are to be connected simultaneously each to a blank conductor in the multiple, the wipers are so arranged that in each contact position they embrace two wires which are positioned side by side.

Except for the contact surfaces the wipers are cast into an elastic insulating mass.

In the drawing I have illustrated only one embodiment of the invention but I do not, of course, wish to be limited to the construction shown but all such changes and modications are contemplated as come within the scope of the Yclaims appended hereto.

I claim: Y

l. A selector arrangement comprising a set of stationary contacts, a movable set of wipers cooperating with said stationary contacts and capable of performing setting movements in two perpendicular directions, a driving mechanism for effecting the rst setting movement, a further set of wipers arranged in driving connection with said driving mechanism, said further set of wipers being adapted during the first setting movement of the first mentioned set of wipers to be set over a further set of stationary contacts associated therewith in a. direction substantially coinciding with the direction of the second setting movement of the first mentioned movable set of wipers.

2. A selector arrangement comprising a bank of contacts, a movable set of wipers cooperating with said bank of contacts and capable of performing setting movements in two perpendicular directions, a driving mechanism for eifecting the rst setting movement, a further set of wipers arranged in driving connection with said driving mechanism, said further set of wipers being adapted during the rst setting movement of the rst mentioned setV of wipers to be set over a L further bank of contacts associated therewith in a direction substantially coinciding with the direction of the second setting movement of the first mentioned movable set of wipers, said last mentioned bank of contacts being designed in V the same manner as the rst mentioned bank of contacts.

3. A selector arrangement comprising a bank of contacts, a movable set of wipers cooperating with said bank of contacts and capable of performing setting movements in two perpendicular directions, a driving mechanism for effecting the first setting movement, a further set of wipers arranged in driving connection with said driving mechanism, said further set of wipers being adapted during the first setting movement of the rst mentioned set of wipers to be set over a further bank of contacts associated therewith in a direction substantially coinciding with the direction of the second setting movement of the first mentioned movable set of wipers, said last mentioned bank of contacts having a distance between its contacts equal to the distance between the contacts in the rst mentioned bank of contacts.

4. A selector arrangement comprising a set of stationary contacts consisting of blank wires, a movable set of wipers cooperating with said stationary contacts and capable of performing setting movements intwo perpendicular directions,

a driving mechanism for effecting the rst setting movement, a further set of wipers arranged in driving connection with said driving mechanism, said further set of Wipers being adapted during the rst setting movement of the irst mentioned set of wipers to be set over a further set of stationary contacts consisting of blank Wires associated therewith in a direction substantially coinciding with the direction of the second setting movement of the rst mentioned movable set of wipers.

5. A selector arrangement comprising a set of stationary contacts, a movable set of wipers cooperating with said stationary contacts and capable of performing setting movements in two perpendicular directions, a tube or rod designed as a rock and supporting a wiper holder which carries said set of Wipers, said tube being capable of performing axial displacement, a driving gear wheel cooperating with said rod performing said axial displacement, a further wiper holder formed as a rack for a further set of wipers cooperating with a further set of stationary contacts, a

further gear wheel which is co-axial with and rigidly connected to the first mentioned driving gear Wheel and adapted to drive said wiper holder.

6. An arrangement for step by step driven selectors comprising a bank of contacts, a movable set of Wipers cooperating with said contacts and capable of performing setting movements in two perpendicular directions, a tube or rod designed as a rack and supporting a wiper holder which carries said set of Wipers, said tube being capable of performing axial displacement, a stepping mechanism for effecting said axial displacement of said tube or rod, a further set of Wipers being adapted during the rst setting movements of the rst mentioned set of wipers to beset over a bank of contacts associated therewith in a. direction which substantially coincides with the direction of the second setting movement of the i'lrst mentioned movable set of wipers, said stepping mechanism also effecting the advance of said further set of Wipers.

DAVID LAURENTIUS LIENZN.

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