close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2410821

код для вставки
-
12, 1946.
' L. HILLMAN
2,410,821
SELECTIVE mbrcnine SYSTEI
Filed Aug. 2a, 1943
INVHVTOR.
LEN MLMAN
Patented Nov. 12, 1946'
2,410,821‘
‘UNITED STATES PATENT OFFICE
'
'
-
2,410,821
‘
SELECTIVE INDICATING SYSTEM
Leon Hlllman, New York, N. Y.
, Application August 28, 1943, Serial No. 500,397
7 Claims.
(c1. 177-353)
'
(Granted under the, act of March 3, 1883, as
amended April 30, 1928; 370 ‘0. _G. 757)
l
z
The invention described herein may be manu
factured and used by or for the Government for
governmental purposes, without the payment to
electrically connected to the other line 31 of the
two line cable by means of any convenient sliding
me of any royalty thereon.
tion determined by the direction of the wind, it
.
contact. When the vane turns to assume a posi
,
This invention relates to telemetering systems
and more particularly to systems for transmitting
and indicating intelligence, such as might be ob
tained from meteorological observations.
Heretofore, in order to transmit the results of
causes a similar rotation of the contactor arm 38
which, by its connection to the line 31, completes
the circuit through the particular segment with
which‘ it may be making wiping contact, and
thence through the associated one of the resistors
continuously changing meteorological observa 10
20-34.
_
’
'
‘A conventional power supply is conveniently
tions it has been necessary to provide a plurality
of transmission lines, each of which was used to
located at the receiver and, as shown in the ?g
ure, it comprises a recti?er 40 whose input is a
carry a signal corresponding to an instantaneous
60 cycle 110 volt supply, and-whose output is fed
value of a particular ‘observation. In such a sys
tem, an increase in the number of desired obser 15 through a bleeder potentiometer ‘calibrating con
trol 42 to a parallel bank'of differentially oper
vations obviously, causes an increase in the num
ated electro-magnetic relays 44—58. Meter M is
provided in order to aid in the calibration of the
relays to predetermined current sensitivities. In
resulting from the grouping of the individual
lines becomes heavy and expensive with regard to 20 order to make these relays di?erentially respon
sive to currents of varying magnitudes they may
the actual material required.
be formed of coils ‘having graded numbers of
An object, therefore, of this invention is to pro
turns, or, they may be provided with armatures
vide a system for transmitting and indicating
Gil-14 of graded weights, or, the holdback
information of this type wherein a two-wire
transmission line is employed regardless of the 25 springs (not shown) of eachv of the armatures
may be maintained at varied tensions, or, any
number of independent observations to be made.
combination of the foregoing expedients may' be
To the accomplishment of the foregoing gen
used for the same‘ purpose. serially connected
eral object, and such other more speci?c objects
with said armatures is a bank of small electric
as hereinafter appear, my invention consists in '
the apparatus elements and their relations to one 30 light indicator bulbs ‘Ht-90.- Thepower source
for the bulbs may be the above-mentioned 60
another as are hereinafter described and sought
cyclellO voltsupply across which is connected 2.
to be claimed in the following speci?cation. The
step-down transformer 92. The secondary of the
speci?cation is accompanied by a drawing in
step-down transformer contains, in its output cir
which the single ?gure is a schematic wiring dia
35 cuit, the relay contacts arranged in two rows
gram of my invention. I
with each row having eight contacts, the row 96
Referring to the drawing wherein there is dis
containing the “break”'wcontacts, with which
closed a transmitter A and a receiver B connected
armatures 60-14 are normally in engagement,
thereto by means of a two-wire cable, the trans
and the row 94 containing the “make” contacts
mitter comprises a commutator 2 which is of the
split ring type including a plurality of ?xed insu 40 with which said armatures are pulled into en
gagement upon energization of coils 44-58.
lated segments 4-48. While the illustrated de
Let it be assumed that the wind vane is directed
vice shows eight such segments it will be under
so that the arm 38 makes contact with segment 4,
stood that the invention is not limited to this
ber .of transmission lines required to carry the
intelligence with the result that often, the cable
1
number,
-
-
'
Electrical connection from each of the seg
as shown in the ?gure by the dotted line. When
this is the case, resistor 20 is introduced into the
ments 4-—I8 to the two-wire cable is made
circuit, and, assuming that said resistor is the
through graded resistors 20-34, one each 01’ the
lowest value resistor of the bank, the current in
resistors being connected at one terminal to one
the two-wire cable is a maximum. Suitable ad
justment of the calibrating control 42 may be
each of the segments 4-—l8, while the other resis
tor terminals are connected in parallel and to one ,
wire 36 of the two-wire cable. Rotatably mounted
at the center of the commutator 2 is a contac
tor arm 38 which is connected to a rotatable
standard bearing a meteorological element as for
example a wind vane (not shown).
made in order that, under such conditions all the
relays 44--58 are energized sufficiently to throw
all the armatures 60—'l4 from their “break” posi
tion, as shown, into engagement with‘ their
“make” contacts in row 94. It will be obvious
Arm 38 is 65 that, with all armatures in this position, current
2,410,821
3
4
position while the other contact is in its ?rst posi
will flow from terminal 96 of transformer 92,
tion to remove the short circuit from only one of
through lamp 90 and armature 14, to the termi
said elements and to connect it across said source
nal 94 of said transformer, only the lamp 50
of current to cause operation of only said one ele
passes enough current to cause it to glow, the
and means responsive to positioning of
other lamps ‘I6-—88 being effectively shorted out 5 ment,
both contacts in the second position to remove
by the armature ‘H.
'
the short circuit from only the other element and
When the direction of the wind shifts enough
to cause the contactor arm 38 to wipe across seg
to connect it across said source to cause operation
of only said otherelement.
ment 6, resistor 22 replaces resistor 20 in the cir
3. A selectively-operable electrical signal sys
cuit and, provided that the former resistor is 10 tem comprising at least a pair of identical signal
somewhat greater in value than the latter resis
elements, a source of current normally discon
tor, the current value in the circuit is reduced
proportionately.
nected from said elements, at least a pair of re
motely controlled electromagnetic relay switches
As a result, we ?nd all the armatures 60-42
are drawn into “make” position, except armature 16 each having ?rst and second positions. means in
14 which, assuming that its relay coil 58 is in
sensitive to the current value now maintained,
remains in “break” position. When this situa
tion obtains, it will be clear that current will ?ow
cluding said switches when both are in their ?rst ‘
positions to short circuit each of said elements,
means responsive to positioning of one of said
switches to its second position while the other
is in its ?rst position to remove the short
from terminal 96, armature ‘I4, lamp 88v and 20 switch
circuit from only one of said elements and to con
armature 12, now in the “make” position,- to the
nect it across said source of current to cause
terminal 94, so that only the lamp 88 passes cur
operation of only said one element, and means
rent enough to make it light up, because contact
responsive to positioning of both switches in the
14 will short out lamp 90, the remainder being
second position to remove the short circuit from
only the other element and to connect it across
said source to cause operation of only said other
element.
4. A system as set forth in claim 2, wherein
made to glow. Thus, by merely observing the
said
relays are graded so that they operate in
bank of bulbs to see which one happens to be lit, 30
response to different potentials applied thereto.
the observer may ascertain the direction of the
said relays being connected in parallel to a source
wind at the transmitter.
of variable potential.
effectively shorted out by armature 12. In a sim
ilar manner, it may be shown that corresponding
to each segment 4-—l 8 with which the arm 38 may
come into contact, there is one lamp which is
It will be understood that other meteorological
5. A remote-control system comprising a pair
fall measuring device, or wind velocity instru 35 of terminals adapted to be connected to a source
of current, a network including a plurality of
ment, each provided with suitable gear mecha
load
circuits 'connected in end-to-end relation
nism to operatively connect the element to arm
ship, one end of said network being connected to
38, may likewise be employed at, the transmitter
one of said terminals, means to selectively com
with similar results.
plete the connection of said load circuits to the
40
Having described the preferred form of my In
other of said terminals, said means'comprising a
vention, many modi?cations may become appar
plurality of relays, each having an armature con
ent to those skilled in the art and I wish it to be
nected to a diiferent junction between said load
understood therefore-that my: invention is limited
circuits, each relay having a break-contact and
only by the scope of the appended claims.
45 a make-contact cooperating with its armature,
I claim as my invention:
said break-contacts being all connected to one
1. A selectively-operable electrical system com
of said terminals, and said make-contacts being
prising at least a pair of identical elements, a
connected to the other of said terminals.
source of current normally disconnected from
6. A remote-control system comprising a pair
said elements, at least a pair of switches each
having ?rst and second positions, means includ 50 of terminals adapted to be connected to a source
of current, a network including a plurality of
ing said switches when both are in their ?rst
signal
lamps connected in end-to-end relation
positions to short circuit each of said elements,
ship, one end of said network being connected to
‘ means responsive to positioning of one of said
one of said terminals, means operable from a re
switches to its second position while the other
mote point to selectively complete the connection
55
switch is in its ?rst position to remove the short
elements, as for example an anemometer, a rain
circuit from only one of said elements and to con
nect it across said source of current to cause op
eration of only said one element, and means re
of said lamps to the other of said terminals, said -
means comprising a plurality of electromagnetic
relays, each having an armature connected to a
different junction between said lamps, each relay
sponsive to positioning of both switches in the
second position to remove the short circuit from 60 having a break-contact and a make-contact co
operating with its armature, ‘said break-contacts
only the other element and to connect it across
being all connected to said one of said terminals,
said source to cause operation of only said other
element.
2. A selectively-operable electrical signal sys
tem comprising at least a pair of identical signalw
elements, a source of current normally/"discon
nected from said elements, at least/a’ pair of re
lays each including contacts having first and sec
ond positions, means including said contacts
when both are in their ?rst positions to short cir 70
cuit each of said elements, means responsive to
positioning of one of said contacts to its second
and said/,mak’e-contacts being connected to the
other'o'f?said terminals.
'I. A system as set forth in claim 6, wherein
said relays are graded so that they operate in re
sponse to different current strengths through
their coils, means connecting all said coils in
parallel with a source of current, and means at
said remote point to vary said current.
LEON HILLMAN.
Документ
Категория
Без категории
Просмотров
0
Размер файла
350 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа