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SECTION 5 - r* ADDENDA
September 30, 1948
Edgerton, Germeshausen & Grier, Inc.155 Massachusetts Avenue
Cambridge 39, Massachusetts
I ..
(i
CONTENTSSECTION 5
Control and Firing Circuit
/"Series 3101 Dwgs. No. Dl through D25
' NRL Figs. No. 16-19, 16-36, 16-54
Series 3101 Dwgs. No. D26, D27, D28, D31
/ DN- 11 Relay Pamphlet
Alpha TellerV v,/
Series 3102 Dwgs. No. B3, B4, 88, B9, B20, D21
Related Tasks
/X-Unit Tester Series 3101 Dwg. No. C29t
,-Delta Timer E.G.&G.,Inc. Model II
Oscilloscopes and Cameras
'/ Series 3102 Dwgs. No. D1, B6
DuMont Series DE, Sheets No. 1175, 1176
Series 3102 Dwgs. No. Di1 through C19
Concrete Shelters, etc.
J&M Sheets No. 1 through 11
J&M DA 27-12 (8 sheets)
J&M Sheets No. 12 through 16
( M DA 34-6
J&M Sheets No. 17, 26
Air Conditioners
Sheets No. 1 through 72
I _ _
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Us
Style "DN-11" D.C. Relays
No.134.
Ittivit Ont#ma* & toe. v
* SWISSMWZ. PA.
Subi. Style"DN-11" Relays Sales Information Sheet
.. ... . .... .. N - 134
See also Bulletin #129 and D.. Sept. 23, 1930Catalog Plates E-4900 to 4903.
The style DN-11 relay follows closely the lines of our
DN-1O relay covered by Sales Information Sheet 124. The contact
system of these two relays is approximately the same excepting that
the mounting means for the contact fingers has been somewhat sim-
plified.
The same V type graphite and flat spring finger is com-
mon to both relays. The design of the DN-11 relay however, offers
more completely a universal line of relays as this model is arranged
in four, six, eight and tor contact finger types. All models are
arranged with front and back contacts for each finger, the same con-
tact parts being used for 4, 6, 8 and 10 contact relays.
*The top plates of all the sizes are of moulded bakelite
instead of porcelain as in the DN-10 relay.
All models may be equipped with shock absorbing springs
when either shelf or wall mounted.
In the Style DN-I1 relay an improved terminal post ar-
rangement has been made so that the circuits through tho relay are
more easily traced. These terminal posts are arranged in throe
rows parallel to the front of the relay, the first row representing
the heel connection of the spring, the second row the back contacts,
Ruerd D s /Supersedes issue of 12/18/28
U.S. & S.Co. - 2 - S.I.3. #14
and the third row next to the coils, the fronit contacts. The left
hand set of these terminals represents the three connections to
the left hand spring and counting from the left to right they fol-
low the spring arrangement of the relay. The terminals to the
coils of the relay are easily identified because the leads from
the coils connect to them.
The magnetic structure of all DN-1l relays Is of non-
ageing iron, so that the effects of residual magnetism do not in-
crease with time, and decrease the release of the relay.
With the improved magnetic structure of the four ohm four
point DN-11 relay, characteristics as shown in Table I are obtained.
The characteristics of this relay, as will be noted, are well with-
In the A.R.A. requirements.
3.0
2.
2.0' N M
1.5
0 1000 2000 3000 4000 5000 6000 7000 800 000FEET (LENGTH OF TRACK CIRCUIT)
U.S. & S.Co. - 5 - S.I.B.#154
TABLE I
Minimum Drop-away without contact pressure 0.015 amp.Minimum Drop-away with contact pressure 0.057 pMaximum Direct Pick-up 0.065 "Maximum working current (armature to stop pin) 0.070 "Front contact opening 0.050 in.Back contact opening when front contact Just
makes 0.050 in.
The characteristics of the DN-11 relay are such that when
a DN-11 relay is to be substituted for a DN-10 type the same re-
sistance relay should be used.
When the DN-11, four point relay is to be used In place
of a Model 13 four point relay, and when voltage is the only con-
sideration, a relay resistance about twice that of the Model 13
relay may be used. A comparison Is shown in Table II. Otherwise
the selection of the proper relay will depdnd upon. the circuit con-
ditions, bearing in mind that the current reqnl|reent of the DN-11
.9
Ur 0000
NCF I.P OF RAK CRC
TRC ..R.. E O N 0 O I .O
110
0 1000 2000 3000 4000 6000 6000 7000 6000 9o0oFEET (L.ENGTH or TRACK CIRCUIT)
TRACK CIRCUIT CHARACTERISTICS FOR DN-IO, DN-11 & MOD. 13 RELAYS.
1.8. & S.C. - 4 - S.1.S. #134
relay is considerably less than that of the Model 13 relay. It
should be noted that where a series line relay is used for approach
lighting, the substitution of a DR-ll relay must either be accom-
plished by using higher resistance for both it and the series relay,
or the DN-il relay should have the same resistance as the relay re-
placed, to provide proper current for the series relay.
When replacing a Model 13 or DN-10 slow release relay with
a slow release DN-11, approximately the same resistance should be used.
'Ihile there is a similar advantage in the use of DN11, 6,
8 and 10 point relays over corresponding Model 13 relays, the rela- 0tion of resistances, noted above, does not hold true.
Table II gives the current as well as the voltage charac-
teristics of the ordinary acting DN-ll, 4 contact relay, compared
with the four contact Model 13 relay.
TABLE II
4 POItT DN-11 RELAYS MODEL 13 PELAYS *
Res. Res.per Min. perpair "orkiMn Max. I).P.U. Release pair Workingof of 0coil Amps. Volts Amps. Volts Amps. Volts coils
2 .105 .21 .094 .188 .053 .106 2 0.1734 .00 .28 .065 .260 .037 .148 4 .1209 .050 .45 .047 .423 .026 .234 9 .09016 .034 .54 .032 .512 .018 .288 16 .067100 .016 1.59 .0140 1.48 .0084 .84 Volts250 .0102 2.56 .0094 2.35 .0054 1.34 100 2.77500 .0070 3.50 .0065 3.25 .0037 1.95670 .0064 4.26 .0059 3.96 .0033 2.15 250 4.331000 .0053 5.27 .0049 4.90 .0028 2.78 500 6.501500 .0041 6.21 .0030 5.76 .0022 3.28 670 7.242000 .0037 7.40 .0034 6.88 .0019 3.92 1000 8.71
U.S. & S.Co. - 5 - 3.1.8. #134
S The above list includes the relay resistances which we
have adopted as standard for DN-11 relays. They include the more
common relay resistances, also the resistances which will best re-
place the Model 13 relays in service.
651'i 58 59 160
83 i0 61 17 32 332 2
23
19 T T 2 O .
3 6 9 3
Detal.l of style 1-11 tour 2t Relay
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