close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2116255

код для вставки
May 3, 1938.
J. H. WHEELOCK
2,116,255
SIGNAL CODE SENDING SYSTEM
Filed March 26, 1952
2 Sheets-Sheet 1
May 3, 1938.
J. H. WHEELOCK
2,1 16,255
SIGNAL CODE SENDING SYSTEM
Filed March 26, 1932
A4
A6
4-5 V
10d
11
2 Sheets-Sheet 2
Patented May 3, 1938
2,116,255
UNITED STATES PATENT OFFICE
2,116,255
SIGNAL CODE SENDING SYSTEM
John H. Wheelock, Fitzwilliam, N. H., assignor
to Signal Engineering & Manufacturing Com
pany, New York, N. Y., a corporation of Mass
achusetts
Application March 26, 1932, Serial No. 601,345
2 Claims.
The present invention relates to an improved
signal code sending system for controlling the
operation of various kinds of electrical signal de
vices, calling and locating individuals by code
5 number, as well as the sounding of time and ?re
alarms being well known uses of such a system.
According to the present invention, there is
provided an improved signal code sending sys
tem which can be installed with great facility,
10 at low cost, and which contemplates the employ
ment of portable duo-potential signal units in
connection with a portable code sending appara
tus. In the operation of the system, the ener~
gization of the sending apparatus from a source
15 of given voltage results in dual energization of the
signal units at diilerent voltages, one determined
by the source, and the other determined by the
code sending apparatus. The invention further
contemplates the extension of the system to con
20 trol an inde?nite number of signal units without
overloading the signal control mains, as ener
gized through the code sending apparatus.
The
above and other advantageous features of the
invention will hereinafter more fully appear
25 from the following description with reference to
the accompanyingr drawings, in which:—
Fig.~ 1 is a schematic view illustrating the
physical appearance of the system as a whole.
Fig. 2 is a wiring diagram showing the elec
30 trical connections of the system shown in Fig. 1,
at the time of sending a signal impulse.
Like reference characters refer to like parts
in the different ?gures.
Referring ?rst to Fig. 1, there is illustrated,
35 schematically, the complete system in which the
conductors, or mains I, of a wiring installation
are shown as providing a number of outlets 2
at separate points, as in a building, the entire
installation being, for example, in accordance
40 with the regulations governing the distribution
of current at 110 volts, or higher. The system
also comprises control mains 3, preferably in the
form of two conductor twisted cord usually em
ployed in the installation of low voltage apparatus,
the control mains 3 providing a number of out
lets 4, such as ordinary jacks or terminal blocks,
disposed throughout the system adjacent to the
power outlets. 2. Since all the control wiring
(Cl. 177-7)
without necessitating any work in connection
with the power wiring installation.
Associated with one pair of adjacent outlets 2
and 4 is a portable code determining and code
sending apparatus 5 or" the type shown and de- 5
scribed in Patent No. 1,823,586, issued Septem
ber 15, 1931 to Herbert Burdick, although ob
viously the system may be employed in connec
tion with other types of similar apparatus. In
Fig. 1 the reference character A designates a code 10
determining, or setting, device cooperating with
a code sending device B, in a manner hereinafter
described. The apparatus 5 provides. a cable 5
carrying at its end a suitable plug 1 for inser
tion in a power outlet 2, as well as a length of 15
twisted cord conductor 8 carrying at its end a
plug 9 for insertion in the nearest outlet or jack
4. Therefore, when locating the code determine
ing and code sending apparatus 5 at any desired
point in the system, it is only necessary to place 20
the apparatus 5 adjacent to the nearest pair of
outlets 2 .and 4, installation of the apparatus 5
being completely accomplished by inserting its
plugs ‘l and 9 in the outlets 2 and 4, as shown.
As hereinafter more fully described with refer- 25
once to Fig. 2, the code determining device A and
its. associated code sending device B are adapted
to be energized and to operate at the voltage of
the supply mains I, and the functioning of the
code sending device 8 is adapted to intermit- 30
tently energize the conductors of the chord 8 at
a voltage different from that of the mains I, as
determined by a transformer T, forming part of
the apparatus 5. Consequently, with the plug 9
in a jack 4, each energization of the cord 8 is 35
adapted to transmit a signal impulse to the con
trol mains 3, throughout the system.
Associated with other pairs of adjacent out
lets 2 .and 4 are a plurality of portable duo-po
tential signal units 50 of the type fully shown 40
and described in my copending application Serial
No. 583,820 ?led December 26, 1931. Each signal
unit I0 provides a cable ll carrying at its end
a suitable plug I2 for insertion in a power outlet,
as well as a length of twisted cord conductor 45
I3, carrying at its end a plug I4 for insertion in
a jack 4. When installing a signal unit II] at any
desired point in the building, it is only necessary
to mount the unit adjacent to the nearest pair
may be installed with the same facility and low
cost associated with the installation of low
of outlets 2 and 4, as by means of wall studs Ilia, 50
see Fig. 2; installation of the signal I0 being com~
voltage apparatus, the low voltage control mains
pletely accomplished by inserting its plugs I2 and
3 can be extended to various parts of the build
ing in which the system is employed to suit the
55 location of the power outlets 2 already installed,
I4 in the outlets 2 and 4, respectively.
With one
or more portable signal units Ill connected as
illustrated in Fig. 1, operation of the signals is 55
2
2,116,255
adapted to be controlled through intermittent
energiaation of the mains 3 through the code de
termining and sending apparatus 5, energy for
operating the striking or sounding element of each
signal unit it being derived from the mains B
through the power’ outlet 2 and the cable ii, as
will hereinafter more fully appear.
Associated with still another pair of adjacent
outlets 2 and 4 is a portable booster transformer
10 unit T’, which provides a cable It carrying at
its end a suitable plug it for insertion in a power
outlet 2. The booster transformer T’ also pro
vides two lengths of twisted conductor cord H
and i8 carrying at their ends plugs I9 and 20 for
15 insertion in an outlet 4 of the mains 3, and an
outlet Ila of auxiliary low voltage supply mains
3a, respectively. Whenever, in the installation of
the system of the present invention in a building,
the current carrying capacity of the mains 3 is
reached, or it is desired to sectionalize the system,
the system can be extended inde?nitely by in
stalling one or more booster transformer units T’,
at any desired points. Obviously, each booster
transformer unit T’ is entirely portable, and its
25 installation is completely accomplished by insert~
ing its three plugs i6, i9 and 28 in one power
outlet 2, and in adjacent outlets Q and lid of the
mains 3 and 3a, respectively. Since as will here
inafter appear, the primary winding of the
30 booster transformer T’ is adapted to be energized
from the supply mains i, only in response to ener
gization of the mains 3, energization of the aux
iliary mains 3a from the secondary winding of
transformer T’ is under the control of the code
deterrruning and sending apparatus 5. And for
the same reason, duo-potential signal units iii,
respectively connected between adjacent pairs of
bridged by the switch bar 26, the other main I
being connected to bus bar A--l through cable 6.
As fully shown and described in the aforesaid
Patent No. 1,823,586, the winding 30, when ener
gized, is adapted to attract a pivoted armature
32, the free end of which is connected to a crank
..
o3. The crank 33 is connected by gearing 34
to a pawl 35 adapted to engage a ratchet wheel
36 turnable with the commutator shaft 22, each
attraction of the armature 32 serving to turn the
commutator brush arm 21 through the displace
ment of one armature contact. Upon deenergi
zation of the operating winding 36, a spring serves
to retract the armature 32 and advance the pawl
35 for another step.
An arm 31 carrying the pawl 35 is adapted to
operate the switch bar 26 through a toggle con
nection 38, the bar 26 being thrown from the dot
ted to the full line position of Fig. 2, upon each
attraction of the armature 32 by the winding 36. 20
Obviously, this movement of the‘ bar 26 in step
with the advance of the commutator brush arm
2! serves to break the circuit of the winding 36,
whereupon the spring serves to retract the arma
ture 32 for another step which takes place upon
reclosing of the switch contacts 3 I.
As indicated diagrammatically in Fig. 2, the
code determining device A provides a number of
keys K movable transversely of the bus bars, ?n
gers serving to determine various code combina~ 30
tions between the keys and bus bars. Normally,
with the keys K in non-code determining posi
tion, only the bus bar A~—l is under voltage from
one supply main i, and the code setting device
is at rest, with one terminal of the operating
inding 38 under voltage from the other main 1
through the closed switch contacts 3 4. Upon de
power outlets 2 and low voltage jacks Ga, are
adapted to operate in unison with the signal units
it connected between power outlets 2 and jacks 1i.
As shown in Fig. 2, the code determining de
vice A consists of a series of parallel bus bars
A-—i to A—iii inclusive, with the terminals there
of connected to a corresponding number of ter
w. Ch minals of codesending device B. The code send
ing device B comprises a commutator providing
pression of a key K, as shown in Fig. 2, a circuit
is at once established from the bus bar A—l to
a number of groups of contacts C-l to 0-9 in
clusive, which are connected to the bus bars A—l
ring 24 to one of the spaced contacts 25 that are
bridged by the switch bar 26 upon each step of
the brush arm 2!, and this action automatically
to A——l9, the corresponding contacts of each
50 group being interconnected, as partially indi
cated. The commutator also provides a brush
arm 2i rotatable with a shaft 22, the arm 2i
carrying at one end a double brush 23, insulated
therefrom, with an outerv ?nger adapted to ride
over the surrounding commutator contacts, while
an inner ?nger rides around an annular contact
ring 24. The ring 212 is connected to one of a
pair of spaced contacts 25 adapted to be bridged
by a pivoted switch bar 26, operating in unison
60 with the commutator shaft 22, as hereinafter de
scribed.
The brush arm 25 carries at its other end a
second double brush 2?, insulated therefrom,
which provides a pair of brush ?ngers, the outer
one of which bears on an annular contact ring
28 that is permanently connected to the bus bar
A-_i through commutator contact C—l. The
ring 28 provides an insulated gap at 28c, which
the ?nger 2i engages when the device is at rest.
70 The inner brush ?nger bears on a third contact
ring 25 that is connected, in parallel with the bus
bar A—-l ii, to one terminal of the operating wind
ing
of the sending device B. The other ter
minal of winding 39 is connected to one of the
mains I through a pair of contacts 3| normally
the bus bar A-lll, through corresponding ?n~
gers to the open side of the winding 38, where
upon the armature 32 is attracted to turn the
brush arm ‘2! through one step to engage the ?rst
commutator contact C—-|.
This ?rst step of the
sending device B establishes a circuit from one
main 5 through bus bar A—l, contact C~—i and
causes the energization of the control mains 3 '
and 3a, of the system, in accordance with the
code, at a voltage different from that of the
mains i. To this end, the other contact 25 of
the toggle switch is connected directly to one ter
minal of the primary winding 39 of transformer 55
T, the other terminal of which winding is con
nected to the main i, other than the main l to
Which the bus bar A—l is connected. The ter~
minals of the secondary winding 40 of the trans
former T are connected to the twisted cord con
ductor 8 leading to the plug 9 in a control outlet
ll, so that each energization of the primary wind
ing 39 by the code sending device l3 causes ener
gization of control mains 3 and So at a different
voltage, with resulting operation of the signal 65
units Iii.
One illustrative embodiment of the type of
signal unit Ill employed in the system consists of
a resonant member 4| disposed in operative rela
tion to a winding 42 and armature 43, the arma—
ture being so disposed that energization of the
winding 42 is adapted to cause sounding of the
signal. One lead from the winding 42 is con
nected to one of the conductors of cable H, while
the other lead from the winding 42 is connected 75
2,116,255
to one of a pair of relatively movable contacts 44.
The other contact 44 is connected to the other
power cable conductor, so that normally there is
a gap in the circuit of the winding 42 between the
contacts 44. Therefore, the insertion of the plug
!2 of cable ll into the outlet 2 does not energize
the winding 42, but merely establishes a condition
in which the winding 42 will be energized upon
engagement of contacts 44 in response to ener
10 gization of another winding 45 of the signal unit.
The terminals of the winding 45 are connected di
15
20
25
30
35
3
alterations in the existing installation of the
power wiring. It is possible to install the neces~
sary transformers with the same facility and low
cost which characterizes the installation of the
code sending apparatus 5 and portable signal
units 10.
I claim:
1. In an electrical signal system, the combina
tion with a series of outlets connected by con
ductors continuously energized from a source of 10
alternating current, a second and third series of
rectly to the conductors of the cord I 3, so that
each signal 10 will be operated upon energization
of the mains 3.
Referring now to the booster transformer T’,
as illustrated in Fig, 2, the transformer provides
a primary winding 46, one terminal of which is
connected to one conductor of the power cable
I5, while the other terminal is connected to one
of a pair of relatively movable contacts 41. The
other contact 41 is connected to the other con
ductor of the cable I5, so that normally there is
a gap in the circuit of the primary winding 46
between the contacts 41. For this reason, the in
sertion of the plug I6 of the cable l5 in the out
let 2 'does not energize the primary transformer
winding 46, but merely establishes a condition in
which the winding 46 will be energized upon en
gagement of the contacts 41. For the same
reason, the secondary winding 48 of the booster
transformer T’ is normally deenergized, so that
when the plug 28 carried by the conductor cord
l8 leading from the terminals of the secondary
winding 48 is inserted in the outlet 4a, the aux
iliary mains 3a are not energized.
The relatively movable contacts 41 in the cir
cuit of the primary winding 46 are under the con
trol of an operating winding 49, the terminals of
outlets connected by separate conductors of lower
current-carrying capacity than the conductors
for said ?rst series of outlets, of a portable
unitary code determining and sending device con
which are connected to the conductors of the cord
former having its low voltage secondary winding
40 l 1. Normally the insertion of the plug l9 carried
by the cord IT in an outlet 4 has no effect on the
winding 49, so that the whole booster transformer
T’ is normally in a deenergized condition. How—
ever, upon each energization of the control mains
45 3 through the functioning of the code sending
device B as previously described, the booster
transformer T’ is automatically energized
through closure of the contacts 41 in the primary
circuit in response to energization of the winding
50 49.
Therefore, the resulting energization of the
mains 3a from the secondary winding 48 occurs
practically simultaneously with energization of
the mains 3 from the secondary winding 40. As a
result, all of the signal units l0 operate in unison,
55 whether they be connected between the supply
mains I and control mains 3, or between supply
mains I and control mains 3a. Obviously, the
number of booster transformers can be increased
in order to provide for the energization of ad
60 ditional control mains, without necessitating any
nected to an outlet in each of the ?rst and second
series and comprising means for transforming
current impulses at the source voltage into cur
rent impulses at a reduced voltage, with opera
tion of said code sending device causing ener
gization of the second series of outlets at said
reduced voltage only during the transmission of
signal impulses by said device, in accordance
with a code determination, and a portable voltage
reducing device connected to one outlet of each
of the ?rst and third series and comprising means
operable from an outlet of the second series for
causing energization of the third series of outlets
from the source, at the same reduced voltage of
the second series, in response only to energization 3O
of the second series of outlets by operation of said
code sending device.
2. In an electrical signal system, the combina
tion with a source of power distribution voltage,
a plurality of outlets connected thereto, a ?rst
circuit of signal wiring of lower current and
voltage capacitythan the powercircuit,a plurality
of outlets connected to the signal circuit, a trans
connected to one of said signal circuit outlets 40
and its high voltage primary winding connected
to one of the distribution circuit outlets, a coding
device providing normally open contacts in series
with the primary winding of said transformer,
a second circuit of signal wiring of low current 45
and voltage capacity, a plurality of outlets con
nected to the second signal circuit, a second trans
former having its low voltage secondary winding
connected to one of the second signal circuit out
lets, and its high voltage primary connected to
one of the distribution circuit outlets, and a relay
having normally open contacts in series with the
primary winding of the second transformer and
its operating coil connected to one of the outlets
of the ?rst signal circuit, with operation of the
contacts of said coding device serving to cause
energization of all of the outlets of said ?rst
and second signal circuits only during the trans
mission of signal impulses by said coding device.
JOHN H. WHEELOCK.
60
Документ
Категория
Без категории
Просмотров
0
Размер файла
561 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа