US1873429A

US1873429A - Electric current distributing device

Info

Publication number: US1873429A
Application number: US531105A
Authority: US
Inventors: William A Knoop
Original assignee: Bell Telephone Laboratories Inc
Current assignee: AT&T Corp
Priority date: 1931-04-18
Filing date: 1931-04-18
Publication date: 1932-08-23
Anticipated expiration: 1949-08-23

Description

-Aug. 23, w KNOOP ELECTRIC CURRENT DISTRIBUTING DEVICE Filed April 18, 1951 j Lind Ugh-j bi big:

By 023K 00: C?

ATTORNEY Patented Aug. 23, 1932 UNITED STA S PATENT OFFICE WILLIAIA.'KNO?, OI EEIPSTEAD, NEW "YORK, ASSIGNOR TO BELL TELEPHONE LABO-. BATORIES; INCORPORATED, OF NEW YORK, N. Y., CORPORATION OI NEW YORK ELECTRIC CURRENT DISTRIBUTING DEVICE Application filed April 18,

V This invention relates to im ulse distributing'devices and more particu arly to rotary distributors employed intelegraphic signalmg.

An object of the invention is to transmit telegraphic impulses over a rotary distributor wherein either a portion or the entire impulse interval, as desired, may beutilized for transmitting signal impulses.

The object more'specifica'lly stated is to facilitate a change in signal transmission whereby the duration of signal impulses impressed on a transmission line maybe changed from'a portion to the entire length of the signal impulse interval, or vice versa, without removing or replacing any part of the distributing apparatus.

The rotary distributors are generally de signed so that the sendingringsthereon are divided into segments arranged for send ng 100% or 50% marking impulses; The sending ringsofthe rotary di'stributor comprise a pair of'rings interconnected by a rotary brush, and are ordinarily arranged to connect an impulse transmitting device to a transmission line. One of the rings isdivided into segments and the other is? continuous; The segments are respectively-connected to contacts inthe transmitting evice in-such a manner that impulses produced at the contacts are successively impressed on the line as the brush rotates over the segmented and the/continuous rings. When the 100% mark ing method of transmission is employed; the impulses im ressed on the line-form a continuous mar ing and s using si al wave, but when the 50% ma 'ng met is em ployed, the markingand s acingiinpulses are separated by zero interva s equal in length to the marking ands acingintervals'. The 100% marking metho requires that all segments. be connected to'the contacts of the transmitting device, but-the 50% method requires that only alternate segments be -connected, the other segments being connected to ground. Inother words, the segments of a ring'a rranged' for 50% marking are-about one-half the an ular length of those fora ring ofthe-sameiamete'r arranged tor 100% marking, and the active segments, :is

1931. Serial No. 531,105.

those connected to the transmitter contacts are detachably and insulatively mountedon the ring. Heretofore when it'was desired-to change the method of transmission from 100%--t o 50% marking, or-vice Versa,-it was necessary to change either the distributor heador connect the segments in pairs. How: ever, in most cases distributors arranged for 50% marking were furnished, but when 100% marking'was desired'the segments were con nected-in pairs, each pair being connected to a' Contact in the transmitting device, and when 50% marking was desired one segment of each pair was, disconnected from the transmitting device and connected to ground.

According to the a present invention I a change from-100% to 50% marking, or vice versa, is expeditiously effected by providing three sending rings, two of'which are divided into segments and the other is continuous. The segmentedrin'gs are adjacent. The segments ofonering are integrally formed with the ring and are separated by spaces approximately equal to the length of a segment. The segments of the other ring are insulatively mounted andare equal in length to a segment and a space on the ring having the integrally formed segments. Each ofthe insulatively mounted segments is provided with aprojection whichextends insulatively between two 'adjacent' segments on-the ring having the integrally formed segments. The rotatable brushes are arranged to connect the con tinuous ring with either of the segmented rings by providing an adjustable arm which may be shortened or lengthened, as desired.

An embodiment of the invention will now be described-in detail and with referenceito the drawing, of which Fig. "1 illustrates a fragmentary View of theface of the sending rings of a rotary distributor designed in accordance with the present invention Fig. 2 shows a front view of the adjustable brush arm adapted for the distributor shown in Fig.1 and Fig. 3' shows a bottom view :of the brush arm of Fig. 2; v

Referring to Fig. 1, transmitting devices 10',10,etc. are shown connected over rotary "too i distributor 11 to transmission line 12. The transmitting devices shown are of the type adapted to operate with the five-unit code, although it is to be understood that the invention is not restrict-ed to this particular type. Rotary distributor 11 comprises segmented

rings

13 and 14, continuous ring 15 and the brush supporting arm 16. The distributor rings are concentrically arranged with respect to each other on the distributor head and are shown developed, in part only, for the purpose of illustration. Ring 14 divided into segments of equal angular length integrally formed with the ring, which are separated by spaces of the same length, the segments being connected to ground.

Ring 13 is also divided into segments of equal length, but separated by spaces of just sutlicient length to provide the necessary insulation, the segments of ring 13 being approximately double the length of those of ring 14. Each of the segments of ring 13 is provided with a projection which extends insulatively between the segments of ring 14, as shown. The segments of ring 13 are arranged in groups of five each and the segments of each group are respectively connected to the five contacts of a transmitter, there being as many groups of segments as there are transmitters 10, 10", etc. The brush shown in line with ring 14 is adjustable with respect to brush arm 16 so that it may be made to engage ring 13 as shown in the dotted lines. The brush shown in line with continuous ring 15 is fixed on the rotatable arm 16 so that ring 15 may be connected to either the long or short segments of rings 13 and 1 1 respectively.

lVhen the distributor is arranged for 100% marking and spacing signal impulses, the support of the brush shown in line with ring 1 1, is adjusted so that the brushes are in engageable relation with

rings

13 and 15. lVhen it is desired to change to 50% marking and spacing, the support of the brush shown in line with ring 14: is adjusted so that the brushes engage rings 14L and 15. Therefore, when the brushes interconnect

rings

13 and 15, the distributor is arranged to send signals to line 12 over the whole impulse interval and when they interconnect

rings

14 and 15, the signals transmitted to line 12 are respective over only one-half of each of the impulse intervals.

Fig. 2 shows the rotatable brush arm 16 arranged in position for sending 50% mark ing and spacing signals. The arm is fixedly mounted on an insulating member 17 which is arranged to rotate in the direction indicated by the arrow shown in Fig. 1. Brush arm 16 has a member integrally formed therewith for supporting the brush 18 in permanent engagement with continuous ring 15. Detachably mounted on the front of arm 16,

is another conducting arm 19 having a supporting member for the brush 20 which may be moved into engagement with either of

rings

13 and 14. The brush support on arm 19 is bent sufficiently to have its brush 20 in radial alignment with brush 18. Arm 19 is provided with a slot extending almost its entire length in order that thumb-

screws

22 and 23, fixedly positioned in arm 16, may hold it in either of its positions which are shown in full and dot and dash lines. When the arm 19 is in the position shown, that is, as indicated by the full line, the brushes are arranged to transmit 50% marking and spacing signals, but when it is in the position indicated by the dot and dash line, the brushes are arranged to transmit 100% marking and spacing signals.

Fig. 3 shows in a bottom view of Fig. 2, the relative positions of

brush arms

16 and 19 and when the brushes are arranged for transmitting 50% marking and spacing signal impulses as indicated in full line and for transmitting 100% marking and spacing signal impulses as indicated in the dash and dotted line.

It is understood that this invention may be employed to send signals over any desired portion of the impulse interval by changing the angular length of the integrally formed segments and the projection of the insulatively formed segments. This will change the percentage of marking and spacing impulses.

What is claimed is:

1. An impulse repeating device comprising segmented rings, the segments of one ring having a projection which extends insulatively between adjacent segments of the other ring, a transmitting device electrically connected to the segments of said segmented rings, aline circuit and a rotatable contacting element adjustably arranged to connect at will either of said segmented rings with said line circuit.

2. An impulse repeating device comprising an input and an output circuit, concentric segmented rings, adjustable means for connecting either of said segmented rings between said input and said output circuits for transmitting impulses of full or partial length from said input circuit to said output circuit.

3. In an impulse distributing device, an input and an output circuit, a ring comprising widely spaced short segments, a ring comprising narrowly spaced long segments, each of said long segments having a projection insulatively extending between adjacent short segments, and an adjustable contacting element for interconnecting said input circuit and said output circuit over either of the segmented rings. 7

4. In an impulse. distributing device, according to claim 3, wherein the first mentioned ring is electrically connected to ound.

5. In an impulse distributing device, ac- I cording to claim 3, wherein the widely spaced short segments are integrally formed on the first mentioned ring and the narrowly spaced long segments are insulatively mounted on the second mentioned ring.,

6. A rotary distributor comprising a continuous ring and a pair of segmented rings concentrically arranged, one of said segmented rings being divided into widely spaced short segments and the other into narrowly spaced long segments, each of said long segments having a projection insulatively extending between adjacent short se ments, and a rotatable brush having an a justable arm whereby either of said segmented rings may be connected at will to said continuous ring. p

In witness whereof, I hereunto subscribe my name this 15th day of April, 1931.

WILLIAM A. KNOOP.