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Publication numberUS2613287 A
Publication typeGrant
Publication dateOct 7, 1952
Filing dateOct 27, 1948
Priority dateOct 27, 1948
Publication numberUS 2613287 A, US 2613287A, US-A-2613287, US2613287 A, US2613287A
InventorsGeiger Edward F
Original AssigneeIbm
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cross connecting board
US 2613287 A
Abstract  available in
Images(1)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Oct. 7, 1952 E. F. GEIGER CROSS CONNECTING BOARD Filed Oct. 2'?, 1948 mvEN-roR Evy/ my ATTORNEYS 1, Whiehinsulating sheet'- or member Hi upon yitsv Patented ct. 7, 1,9521

UNITED onossl CONNECT-ina 130A-RD acorporation of levl 1 yinvention.relates to a vcross;-ariannecting` boardto be usd in controiling signal systems and the like. A .1 i A general object of this invention is to provide an improyed cross-connecting board hating 5 simple and improved construction; l

(n. particularobjctmof this invention qis to provide a cross-connecting board that Nsha-11 haye particular ease of manufacture u and assembiy, and with provisionrnade whereby the metallic strips constituting electrical eleirientsA of the ci?oss-corineeti-ng lboaro'lstructure, may be arf ranged in fixed intertting positions with respectl to their supporting insulating sheets` or members and with saidn stripsl restrained from lateral movements iii-'their interltting position; thereby, facilitatingiproper and-speedy assembly of the several elements of said cross-connecting boa-rd Without the use` of conventional fastening means;

thev dra-Wings:

Y Figure 1 isi-a View of thee-ross'-connectingboard` exploded,A andshoWi-ng the method'of assembling?,`v andy f Figure 2 is a vcross sectional sideview (1f-the orpss-jconneoting board in its assembled relationof parts; Y f

AThe cross-connecting board comprises a sheet of insulating i-nateria/lV Ivi)Y constituting a baseplatei and having the genera-1 sha-pe illustrated inA Fig.

topsurfaco islprovidedwith a plurality of spaced shallow recesses Ii.; eachV recess7 so shapedas'xto receiveand support with a@ neat fit-Ya'E metallic 'strip I3` andy with the upper `faceof eacli stripk flush-` with the top'surfaees of the depressed por# if tion32 ofsaidlinsulating sheetv i0. These metal;` licstrip's I-31at one-end thereof'are'prbvided1 with bent down end portions I'4-v whichN end portions, in; the assembled positions ofthe stripsV I'S'f'tritlfri-n'r tri stata openings is, ao

f- 23 are a recesses 23 are formed oppositeveeso the scdnd isst-listing' siiei financi' iii lij wat the' grooves 23, eachy recess" adapted to receive' the 'J 'iig' pegatinas;

24 in the sheet 22, and furthermore these registering perforations coincide with the slitted openings in the metallic strips i3 and their associated circular recesses or cavities I2 in the insulating sheet I6, the purpose intended being to have the perforations of each metallic strip 25 equally spaced apart and with each perforation in each vstrip in vertical alignment with aparticulai' slitted opening I6 located in a particular metallic strip I3, and this with the ultimate end in View of being able to electrically connect any one of the metallic strips 25 with any one of the metallic strips I3, at the intersection points between said strips, the electrical connection being made by means of a screw plug 29 placed at the discretion of the person operating the crossconnecting board. This screw plug in use and after passing through aligned perforations in the metallic strip 25 and the insulation sheet 22,

makes contact by means of its screw end with an aligned slitted opening of .a particular metallic strip I3 selected.

p A third sheet of insulating material 2l' serves as a cover plate, and formed therein is a series of enlarged perforations 28, each perforation positioned to coincide with a particular set of aligned perforations 26 and 24, slitted opening IS, and circular recess or cavity I2. This insulating cover` sheet or plate has ush engagement with the top face of the metallic strips 25 and also the top surfaces of the insulated sheets I and 22, the several insulating sheets, when in assembled position, adapted to be bolted together by means of four bolts 33. It is alsoto be noted that at opposite sides of this cover sheet 2l, depending flanges 21 are provided for covering the end spaces formed by the depressed portion 32 of the insulating strip IU, thereby assuring a completely covered cross-connecting board in its assembled relation `of parts.

The insulating sheet I0, at one side thereof, is also provided with'a series of holes Il cut through the sheet, each hole being in line with one of the shallow recesses II as formed in said sheet iii, the number of said holes being equal to the number of shallow recesses employed. In thisv Furthermore, a metal strip 3I running the full width of the cross-connecting board, is bolted to the underside of sheet I0, and serves as a common contact element for contact straps I9.

Also a paper tab holder 30 is riveted to the top face of cover sheet 21 at the position shown in the drawings, and this for labeling purposes.

It will be manifest from the drawing and the description of parts so far referred to, that the elements of this device are of simple construc-v tion, and that said elements are assembled merely by fitting one to another, the use of bolts or other fastening meansV being employed only in the final assembly operation, it being further noted that the two sets of metallic strips are especially designed to have intertting relation with their insulating supporting sheets or plates as outlined herein.

The principles of operation of this device are not new but compare to the operation of any conventional cross-connecting board. In this connection the contact straps I9 are electrically connected to a series of signal devices or buzzers, and the strips 25 are electrically connected to a suitable program device. When the operator invserts a screw plug 29 in any one of the holes 28 of sheet 21, an electrical connection is made between one of the strips 25 and one of the strips I3, so that when an impulse is emitted from the program device it will be directed t0 the signal device or buzzer through this particular strip 25, connecting screw plug 29, the particular strip i3, and the contact strap I9 having electrical contact with the strip I3 just referred to, it being understood that each of the strips I3 are normally in electrical contact with a separate and distinct contact strap I9. Consequently a plurality of bells or buzzers placed in a building such as a school may be automatically caused to ring at a specified time of day by inserting the connecting screw plugs into predetermined desired positions on the board, and this in accordance with the impulses emitted from the program device.

rlhe bells or buzzers may be manually caused to ring at any time by pushing down on the push buttons I3, thereby making contact between common strip 3l and any one of thecontact straps I9, said common strip 3| being electrically connected to a suitable source of power.

Having thus described my invention, what 1 claim as new and desire to secure by Letters Patent of the United States is:

1. A cross connecting board comprising in combination as a unitary device a multi-part insulating structure rigidly connected together and including a base plate of insulating material, a series of detachable electrical conducting strips arranged upon said base plate in insulated relation one with respect to the other, each of said strips having one end thereof projecting through the base plate and depending therefrom to a predetermined position, a second series of detachable electrical conducting strips also arranged within said structure in crossed relation to the first mentioned series of strips and insulated therefrom and also each other, each of said'second mentioned strips having both ends thereof projecting from the insulating structure and adapted for electrical connection toa program device, a series of spring metal electrical contact straps fastened to the base plate and extending in a direction toward and beyond the depending ends of the first mentioned strips, each contact strap of said series being positioned to lie directly beneath a depending end of a` strip of said rst mentioned series of strips and' with each of the straps biased in a direction to normally make contact with the depending endof its cooperating strip, means for electrically? connecting each of the contact straps to a signal device or buzzer, and individual plug means in section between said strips, whereby upon opera.

tion of the program device certain signal devices will be operated according tothe electrical connections made.

2. A cross connecting board comprising in combnation as a unitary device an `insulating struc-'f 55 yture including" afibase @plates atseriesof: electrical sconductingifs'tripmarranged withinasaid: structure ,in:insulated-:relation;one with respectxte the other; `each of'y said stripsfghavingicne end `thereof projecting throughtheibaseuplate andi depending therefrom 1.to a: predcterminedposition; a second yseriesaof velectrical conducting' strips alsok ar- `ranged within said. structureincrossed relation vto. the first-mentioned series of strips andi insulated therefrom .and-alsoeach other, each of said secondimentioned strips :having .both ends thereof :projecting lffrom Athe .l insulating ,structure and .adapted for electrical .connection :to .a program device; :a series ofi spring Imetal electrical contact straps fiastenedlto the base :plateand extendingfin acdirectionl toward kand beyondthe depending cndsz-otlthe firstxmentionedstripsgi each contact strap of said series being positioned to lie directly. beneathia.depending4 end of a strip of said first mentioned series of strips and with all ofthe straps biased Ain ay directionto` normally makeL contact withy the dependingend of its cooperating strip, means for electricallyffconnecting each of the contact .straps to a sgnaldeviceor buzzer, plug means'for electrically connecting any one of the first mentioned seriesofstrips with any one ofthe second mentioned series of strips at-'the pbintsof'intersecti-on between said strips, wherebyupon.operation of the pro-gram device certain signal devices-will be operated according to the electrical'connection made; and manually operated means-permanently carried by the insulating 'structure and adapted for moving any one of thel contact straps to break electrical circuit betvveen'said strap-and the depending end of-*its cooperating strip.

3. A cross connecting board comprising in combination as a unitary device an insulating structure including a base plate, a series of electrical conducting strips arranged within said structure in insulated relation one with respect to the other, each of said strips having one end thereof projecting throgh the base plate and dep-ending therefrom to a predetermined position, a second series of electri-cal conducting strips also arranged within said structure in crossed relation to the first mentioned serie-s of strips and insulated therefrom and also each other, each of said second mentioned strips having both ends thereof projecting from the insulating structure and f adapted for electrical connection to a program device, a series of spring metal electrical contact straps fastened to the underside of the base plate and extending in a direction toward and beyond the depending ends of thel rst mentioned strips, each contact strap of sia-id series being positioned to lie directly beneath a depending end of a stri-p of said first mentionedseries of strips, with said straps biased in a direction tonormally make Contact with the depending end of its cooperating strip, means for electrically connecting each of the contact straps to a signal device or buzzer, means for electrically connecting any one of the first mentioned series of strips with any one o-f the second vmentioned series of strips at the `points of intersection between said strips whereby upon operation of the program device certain signal devices will be operated according to the electrical connections made, a power strip `supported upon said base plate and in cooperative relation with each of the contact straps, and a series of selectively operated devices carried by and projecting through the base plate, each engaging a contact strap and when operated adapted to break electrical contact between said conone of the signaldevicesmay beoperated-atthe will of. the operator and regardlessrof stheelectrical connections madegin .the automaticlsetaup including the program device.

- LA- cross-connectingboard comprisingin ycombination-.an insulating fbase plater aseries; of 1detachable metallic stripsihavin'ginterttingfprelaftionship upon said ybase platezandimaintained,out of contact. one withgthe. other; each,l strip having any end' thereofzprojeoting through the .base/:plate to depen-d therefrom: :toca: predetermined; position lbeneath ,the base plate, a. second; insulating: pl-ate havingpa ,face thereof in flusha engagement: with the base plate and its series vof. rinterfittingstrips,

.a second series-of detachable metallcstrips having .interfittingr relationship r upon the v:opposite face of, saidA second insulatinggplateso ,as .toenamltain them out'of contact onexwithzthevotherand in crossed relation .to .thoseogfgthe first. mentioned Strips; an.` insulating-.gouver platehaving-a face thereof in flush engagement with the second insulating-plate and its interfltting strips, v.said cover :plate having axseries; of perf-orationsl corresponding with aligned. perforations :formed in said second series Vof metallic stripsaand7 the second insulating plate .atr the` points ,of int'ersection between thel two A:sets of .strips, meansy forsiholdingl all three insulatingplatesfinfxed assembled relation, one with the: other, plugzmeansginsertable `at Will within any Aof .zthe-alignedz perforations Ifor electrically connecting f any .one of zthe rst mentioned series of strips with any one of the second mentioned series of strips at the points of intersection between said strips and for the purposes intended, and a series of spring metal straps fastened to the under side of the b'a-se plate and extending in a. direction toward and beyond the depending ends of the rst mentioned series.

of strips and with one of the extended ends of each strap beneath each of said rst mentioned strips, each strap being lbiased in a direction toward the lower depending edge of its cooperating metallic strip to make electric contact between said elements, and each of said strapsso mounted on the base plate as to be capable of movement away from said depending ends of said strips to break electrical contact between said elements when required.

5. A cross connecting board comprising in combination as a unitary device an insulating structure including a base plate, a series of electrical conducting strips arranged within said structure in insulating relation one with respect to the other, each of said strips having one end thereof projecting through the base plate and depending therefrom to a predetermined position, a second series of electrical conducting strips also arranged Within said structure in crossed relation to the first mentioned series of strips and insulated therefrom and also each other, each of said second mentioned strips adapted fol` electrical connection to a program device, a series of spring metal electrical straps fastened to the base plate and extending in a direction toward and beyond the depending ends of the first mentioned strips, each cont-act strap of said series of straps being positioned to lie directly beneath a depending end of a strip of said first mentioned series of strips and with each of said straps biased in a direction to normally make contact with the depending end of its cooperating strip, means for electrically connecting each of the contact straps to a signal device or buzzer, means for electrically connecting any one of the rs't mentioned series of strips with V-any one of the second mentioned series of strips at the points of intersection between said strips whereby upon operation of the program device certain signal devices will be operated according to the electrical connections made, and a series of selectively operated push devices loosely carried by and projecting through the insulating structure, each push operated device supported upon and held in place upon the insulating structure by one of the spring biased straps, said push devices when operated serving to break electrical contact lbetween any particular strap and the depending end of its cooperating strip for the purposes intended andas required.

6. A cross connecting board comprising in combination as a unitary device an insulating structure including a base plate, a series of detachable metallic strips having intertting relationship upon said base plate and maintained out of contact one with the other, each of said strips adapted for electrical connection to a signal device or buzzer, a second insulating plate having a face thereof in flush engagement with the base Iplate and its series of intertting strips, a second series of detachable metallic strips having intertting relationship upon the eopposite face of said second insulating plate so `as to maintain them out of contact one with the other and in crossed relation to those of the rst mentioned strips, each of said second mentioned strips adapted for electrical connection to a. program device, an inn8 sulating cover plate having `a a'ce thereof in ilush engagement with the second insulating'plate and its interfitting strips, said cover plate having va. series of perforations formed therein corresponding with -aligned-perforations formed in theisecond mentioned metallic strips and the second insulating plate at the points of intersection between the two sets of strips, means for holding all three insulating plates in ya rigid assembled relation, and plug means insertable at will Within any of the aligned perforations for electrically connecting any one of the iirst mentioned series 4of strips with any one of the second mentioned series of -strips at the points of intersection -between said strips, whereby upon operation of the program device certain signal devices will be operated according to Ithe electrical connections made.

EDWARD F. GEIGER.

REFERENCES CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS Number Name Date 252,395 Odell Jan. 17, 1882 1,199,843 Washburn Oct. 3, 1916 1,718,993 Wermine July 2, 1929 1,954,305 Williams Apr. 10, 1934 2,019,625 OBrien Nov. 5, 1935 2,195,343 Sayre Mar. 26, 1940 2,437,018 Dodson Mar. 2, 1948 2,467,727 Brown Apr. 19, 194,9 2,483,551- Libman Oct. 4, 1949

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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2727215 *Apr 30, 1952Dec 13, 1955Brown Brockmeyer CompanySelector switch
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Classifications
U.S. Classification200/1.00R, 235/492, 439/48
International ClassificationH02B1/20
Cooperative ClassificationH02B1/207
European ClassificationH02B1/20D