US1543669A - Automatic telephone switch - Google Patents

Description

June 30, 1925.

2 Sheets-Shed 1 Filed April so, 1923 I ll 1 I i lllllllllll "ill!" "lllfilll June 30, 1925. 1,543,669

- C.L.GOODRUM ETAL AUTOMATIC TELEPHONE swx'rcn Filed April 30, 1923 2-Sheets-$heat 2 Ml e/7700: mar/65L Goa/rum 0300/ f/Zwbe/y.

Patented June 30, 1925.

uurrsns'rarss CHARLES L- GOODBUM, OF NEW YORK, AND OSCAR F. EOBSBEBGI OF. YONKERS, NEW YOZRK,.ASSIGNOR8 TO WESTERN ELECTRIC COMPANY, INCORPORATED, .OF .NEW 'YORK, N. Y., A CORPORATION OF YORK.

AUTOMATIC TELEPHONE swr'rcni To all whom it may some 2 RUM and OscAnF. F

county of New York, State ,ofNew- York,

and Yonkers, in the county of .Westchestfl', State 0i.New. York, respectively, have .invented certain new; andiuseinl Improvemen s in Automatic Telephone Switches,-of which the following; is a full, clear, concise, and

exact description.

semi-automatic 5 telephone switches. More particularly, it refers to coordinate switches such as are used for establishing connection in a telephone exchange system of the ty e disclosed in British Patent No. 183,438,

sued to Western Electric Company Ltd, ac-

o cepted September 6, 1923', in whichthe pres 2 for use.

The object of thelinvention is to provide an improved .form of coordinate switch. which will be simple, efficient and in which the parts of the operating .mechanism are readily accessible for adjustment or repair.

A feature of the invention resides; in the provision of unitary sets of flat contact springs arranged on insulating supports and insulating cards for holding them in spaced non-contacting relation. 7

Another feature is the provision of, a novel operating mechanism for actuating the horizontal bars whereby the liftingmembers, carried thereby are, moved into opersting relation with the .operatin card through the sequential movement 0 a plurality of magnet arniatures. 1

Another feature is the provision 1 of a jointed selecting bar in which the loose motion of the joints is eliminated by means of a spring attached to its upper end. and dis-i posed-to act against the pullv of the magnet. in order to keep the operating members car ried thereby in alignment.

Another feature is the provision Of flBXlble arinatures for o crating the vertical bars whereby the angu ar distance of each bar is controlled by means of stopping members independently of the stnoke adjustment of its 0 crating electromagnetic'means.

Ot ier features of invention and advan tages will appear from the following deout invention is particularly well adapted Application filed April 30, 1923. wSerial N0. 635,490.

scription, and by the claims appended thereto, reference being had, to the acconipany mg drawings in which Fig. 1 is a topseotional View of a portion ofsaid switch, lug. 2, is a leftshand side view thereof, Fig} 3 is a frontlassembly view-of :a setof active:

and passive contacts showing a selecting: arm in cross section viewed approximately on line-3-3 of Fig. 1, Fig. ,4 is a front sectional view of the same contactset; but taken e on line of Figsl, Fig. 5 is. an enlarged. This invention relates to automatic and cross section view of the selecting arm taken. approximately on line 5+5 of Fig.1, show- .ing; diagrammatically the sequential movement of the lifting niembersFig, 6 is a sectional view of an operatingbar taken approximately onqline 6-6of Fig. 1, Fig. 7 isv a, sectional..-:view of -an;oper-ating barv showing the position ofthe armatures relative to :their respective operating electromagnets, taken approximately on line 77 ofFig'. 1, Fig. 8 IS a top view ofthe se-- lcctiug bar with thecoupling shownin cross section taken approximately on line 8-S of Fig. 2. I i

. PATENT.OF'FICEI Theswitchingstructure shown in Figs. 1

and 2 generally comprisesa plurality of unitary sets of active and passive contact springs arranged on the insulating supports 10 rigidly fastened on the switch frame. (not shown).

Each contact set comprises a number-of. stationary contact 3 rings-11, 12,13 and 14 which are associate with a corresponding number of movable contact springs-15, 16, 17' andJS, respectively; The active and passive contacts of each set are located inen. gageable relation in-rectangular, shaped slots19 and-20 of a stationary card .21.

The cards 21 are each fixedlyarranged on two laterally extending arms 23 and 24, integrally formed with thereinforcingplates- 25am 26 which are rigidly fastened on two opposite sides of supports 10 by any suitable 7 fastening means.

The operatingfcard 22 is slidably arranged between therstationary card21and the inwardly bent portions 25 and 26 of arms 23 and: 24, respectively- Theinsulating supports 10 may carry any number of unitarysets ofcontact springs 11, 12, 13, 14 and 15, 16, 17, 1.8,,etc.,. and the switch structure may comprise any numher of supports 10, depending upon the switch capacity desired.

For each horizontal row of contacts there is provided an operating bar 27 having a number of laterally extending arms 28, and on each arm 28 there is provided a lifting member 29 which has one end hooked on the bar QT and held in adjusted position on arm 28 by means of a screw 30 and a stop 31.

For each vertical row of contacts, there is provided a selecting bar 32 provided with a number of arms It is to be noted that normally the lifting members 29 are free to move in a vertical path without engaging the cards with which they are associated as shown at 51 in Fig. 3.

For convenience in assembling the switch, the selecting bar 32 is preferably made of a number of relatively short bars which are disposed coaxially and coupled by means of a universal joint 34, shown in Fig. 2. T he universal joint 34 shown in cross section, Fig. 8, generally comprises a sleeve 57 having two holes orilled at right angles relative to each other and adapted to receive the pins 55 and 56, each of which is adapted to operatively connect its respective bar 32 to the sleeve 57. On the lower end of bar 32, there is rigidly secured an arm 35, disposed in operable relation with a resilient armature 36 associated with an electromagnet $37. The arm 38 which is an extension of arm is rigidly secured on the bar 32 and engages an adjustable stop 39 provided for limiting the movement of the bar 32 in normal non-operating position against the resistance of a spring 40 acting on a pin 5% secured to the upper end of rod 32 and adapted to hold the arms 33 in alignment. Therefore, by means of this combination of parts, it is seen that the coupling pins 55 and 56 do not need to be tightly adjusted in order to hold the arms 33 in alignment for the looseness of the pins is automatically taken up by the tension of spring 40 which holds the bars and coupling tensioned against the stop 39 and its operating armature An adjustable stop a1 is provided for limiting the movement of the bar 32 in adjusted position with reference to the lifting members 29 served thereby against'the resistance of the resilient armature 36 whereby the angular distance of the bar 232 may be adjusted independently of the stroke of its operating electromagnetic means.

For each bar 27 there is provided a pair of armatures l2 and 1-?) adapted to rotate the bar in response to the successive energization of electromagnets it and 45. Magnet llis associated with armature 42 which is pivotallv arranged on the bar 27 and held in adjusted position relative to its operating magnet by means of an adjustable stop l6.

Magnet $3 is associated with armature 45 which is rigidly fastened on the bar 27 by means of a number of rivets 47. A stop 48 arranged on a portion of the switch frame is provided to hold the bar in normal nonoperated position against the resistance of the retracting spring 49, hooked on the downward extending lug 50 of the bar 27 shown in Figs. 6 and 7.

The sequential movement of the lifting members, relative to the operating cards, is shown diagrammatically in Figs. 3 and wherein the lifting member 29 is shown in normal non-operated position. \Vhen the bar 27 is moved one step through the energization of magnet 44, the lifting members thereon are moved in operating relation with their associated arms 33, as shown at in Fig. 3, whereupon the movement of the selecting bar 32 moves the lifting members in operating relation with the operating cards 22, as shown at The second step of bar 27 imparted through the energization of magnet 45 is thereby effective to lift the operating card for engaging the contact springs and to move the lifting members in positions wherein any subsequent movement of the selecting bar 32 is ineffective to dis tnrb the connection already established.

\Vhat is claimed is:

1. In a switching device, the combination of disengaged contacts, an operating bar therefor, electromagnets for operating said bar, a resilient member carried by said bar and movable sequentially in a plurality of coordinate directions for operating said contacts.

2. In a switching device, the combination of sets of disengaged contacts, a rotatably operating bar therefor, an arm integrally formed therewith, an operating member supported thereby and movable in separate steps in a plurality of coordinate directions, a rotatable bar having means for operating said member whereby it is effective to cause the interengageinent of said contacts.

3. In a switching device, the combination of disengaged sets of contacts, an operating mechanism therefor comprising a bar, a pair of magnets for actuating said bar step by step, resilient members carried by said bar and movable sequentially in different directions, another bar for moving said members in one of said directions after the first step of the first mentioned bar, another n'iagnet for operating said bar a second step for engaging said contacts.

4. In a switching device, sets of normally disengaged active and passive contacts arranged on an insulating support, reinforcing plates on each side of said support, an arm laterally extending from each of said plates, a card fixedly arranged on said arms for holding said contacts in engageable relation, a movable card arranged on said supports for operating said active contacts, and

means sequentially operated for moving the second mentioned card to effect the interengagement of said contacts.

5. In a switching device, sets of normally disengaged active and passive contacts arranged in coordinate rows on insulating supports, a selecting mechanism therefor, comprising a stepping bar for each row of said active contacts, operable members carried by each of said bars and normally movable step-by-step in a path wherein they are ineffective to engage contacts, a bar common to said members in one of said rows and means thereon for operating any one of said members with reference to said contacts, and another magnet for rotating the stepping bar another step to cause the interengagement of said active and passive contacts.

6. In a switching device, a plurality of sets of active and passive contacts arranged in coordinate rows, a pair of coordinately disposed bars therefor, means for rotating one of said bars in a number of steps, magnetic means for operating the other bar to render the movement of the stepping bar effective with respect to said active contacts.

7. In a coordinate switch structure, a row of unitary sets of normally disengaged active and passive contacts disposed in a common plane, a step-by-step movable bar common to said sets, a plurality of arms integrally formed therewith, one for each of said sets, an operable member on each of said arms movable in plane at right angles to the ion itudinal axis of said bar, a selecting bar or each of said sets and means carried thereby for moving one of said members in said plane after the first movement and while the first mentioned bar is at rest, and means for operating the last mentioned bar another step for causing the interengagement of said active and passive contacts.

8. In a coordinate switch structure, coordinately disposed rows of unitary sets of disengaged active and passive contacts, a mechanism for selectively engaging said contacts comprising a stepping bar for each horizontal row of said contacts, operable members carried thereby, a selecting bar for each vertical row of said contacts, a magnet for operating the stepping bar one step to move said members in position wherein a movement of a vertical bar is effective to move one of said members in operative relation with a set of active contacts, another magnet for moving the stepping bar another step for engaging the contacts of that selected set.

9. In a switching device, a jointed selectalignment against said stop regardless of the looseness in the couplings.

10. In a coordinate switch structure, the

combination of a plurality of unitary sets of disengaged active and passive contacts arranged in a row, a jointed selecting bar therefor, operating members arranged on said bar each associated with one of said sets, an armature attached on one end of said bar, an adjustable stop for limiting the movement of said bar, a retracting spring attached on the other end of said bar to hold said bar and operating members thereon in adjusted position regardless of the angular looseness in the joints.

11.111 a switching device, disengaged contacts, an operable bar associated with saidcontacts, a stepping mechanism for rotating said bar comprising a magnet, an armature pivotally arranged on said bar and responsive to the energization of said magnet for rotating the bar one step, another armature securely arranged on said bar for moving said bar another step for engaging said contacts.

12. In a switching device, a selecting bar, an operating magnet therefor, a resilient armature, in operable engagement with said bar, and a stop for arresting said bar in adjusted position against the resistance of said armature when attracted by said magnet.

13. In a switching structure, the combination of normally disengaged stationary and operable contacts, an operating mech anism therefor comprising a bar, a plurality of electromagnetic means for moving said bar, step-by-step operable members carried by said bar and normally movable in a path wherein they are ineffective with respect to said contacts, another bar for mo"- ing said members in a direction at right angles to said paths after a movement of the first mentioned bar, means included in the first mentioned means for interengaging said contacts and for moving said members wherein any subsequent movements of the second mentioned bar is ineffective to disturb the connection already established.

In witness whereof, we hereunto subscribe our names this 26 day of April A. D., 1923.

CHARLES L. GOODRUM. OSCAR F. FORSBERG.

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