The Huron Expositor, 1941-02-21, Page 6Te Condensed frOtn the Atlantic hfOnVIIY
goptk4erP-DigeAt,
Manchester
Ireara ago the Amenicaa
‘pailseir first close-up of a
tat would open doors
They saw two metal
PT14feet apart, each • With a
-reu44, window from Which
a horizontal beam of light.
l'i'tottr •body severed this light
Oslik,„ the door Swung silently open,
globe slowly after you.
Ilts Was One of the simplest tasks
Wbiebt the "electric eye" has bees
•taaght to •Pellets/a The beam of
from an ordinary light bulb
• fell upon a photoelectric cell. This
• Sensitive cell, which looks ike
Mall lamp ,bulb, translated the in-
terruptions of the beam into fluctu-
ations of electrical energy, and this
started a small electric motor which
opened the door.
--THE PUREST FORM IN WHICH
TOBACCO CAN BE SMOKED.*
Geared to a multitude o ,use, the,
elerettie ,eye ia.ap .brought about some
of the meat important technological,
developments of the age. The ply,
totube, as it 1 often called, -gave the
movies their voice. Upon it restsai
Progress in television. It has been.
taught to simulate , seeing, hearing,
•talking, feeling, satellin,g, It &steers
ships, catches burglars, sorts fruit,
detects smoke, nabs speeders, counts
pills and matohes color with instan-
taneous swiftness and infallibility.
In factories it Inspeets finished goods
rejecting faulty aroducts-with an ac-
curacy of measurement of a hundred -
thousandth of an incth.
Installed in, elevator floors, the
electric eye insures precise "leveiing
of" at landings. Light from a small
bulb set at each floor level falls upon
the phototube, vsh,ose current actu-
ates the braking mechanism at the
correct moment. Another eYe keeps
the elevator door from closing on last -
second entrants. Similar iostallations
can open and close garage doors aut-
omatically.
Before spending millions for a new
road, state highway departments use
the new tool to get accurate data on
local traffic conditions. Eyes instal-
led besides a highway coun't automo-
biles and record their speed- Speed
is computed by the time which elapses
4. 4414,4:
M'914.1* gg* -'01P0 949, WAY efi'e44 tortet
Otbardas 114-44t4101VARa 494.
$0,00 tat #.4410.. uses are • being
tested' eltnerinientali* to Padttee ao
Oadallta. 90,4;740%4 .4evice. boa
1)404. -Pro;tOnted .whink. entoutati,'
eollY dint the headlighta -et apPreaeh-
ing ears at night.. Your lights act
Upon 'a nhOtottlhe in the eowl of the
oncoming autentobile, an a meelmo...
/MA turns ou its dimmer; the other
driver's 'headlights do the same for
You -
Set to 4%191.14 to a certaita degree
of day1i1t, electric eyes have been
installed in many school, faetorida
• Offices and otreets for the automatic
'oontrol of artificial lighting. A busy
teacher may not .'aotice that the sky
is overcast and that childrea's noses
are 'getting closer and closer to their
books... The vigilant eye on the wall,
however., turns on the schoolroom
lights when daYight fails, and turns
them off when they are no -longer
needed. The device is also used by
airports, whose landing lights must
be turned on when daylight is -in-
adequate.
When storms darken the sky, nal_
ity companies must be prepared for
the added light current load. Here
an electric eye, mounted )on the pow-
erhouse roof, warns plant engineers
wen in, advance of the .rush.
One of the eye's most sensational
roles is that of night watchman. For
this purpose, "black" or inflared light
is used. The human eye cannot see
it, but the electric eye reacts to its
invisible rays.*Black light from an
CANADA'S LEADING COOKERY
EXPERTS
,REC0M19MAtiLIC_
The
F ,
• Generation540"PN
frYD.11
inconsPicuous source near the base-
board ef a room hits a photetube on
the oPPeeite. side. When Chia beam
is intercepted an alarm goes off. With
mirrors You can criscross the entire
room with inviable rays so that. o
intruder; even if he crawls on his
belly, can avoid deteetion. A further
refinemela is a 'oonaealed camera with
a noise -making device and flash bulb.
The burglar bears the noise and looks
at the camera jast in time to be photo-
graphed. The eye has also bean in-
staLled to weals over sleep -walkers
and „mental patients. A light beam
is broken: if the patient leaves his bed
and an alarm is sounded in the room
of a' nurse or member of the famaY.
Except for the present cost of the
equipment, it 'would be easy to In-
stall electric eyes for various domes-
tic uses -to turn your porch ligha, on
autoanatically when a caller approach-
es your door, for Instance. But for
most Purposes the new device is ec-
MONEY
•.' f' •...saved
a. •
buysplanes, tanks, • ships,
guns, • munitions, supplies, to
bring Victory •
ONEY saved NO
flows back into Canadian
pockets in wages and purchase
of necessities
Buy
fi
EY,saved NO
will provide after - the - war
protection for those who save
WAR SAVINGS
• CERTIFICATES
Regularly
This space donated to the
Seaforth and District War Savings' Committee
By •
The Huron • Expositor
ESS,
MAIL EQR IRO
OVEItStAS AND C NADA
Polit,master General W.
P. 11i -taloa wanounces that OWing to.
the recently authorized Osage in the
title of tbe military forces Of Caliada.
the designation. "CanadialisAtme will
now be used instead of "Canadian.
Active Service. Force (C.A.S.F.)."
Mail for soldiers on active service
should, therefore, now be addressed
as follows.:
Mail For Delivery Overseas
The, designation "C.A.S.F., c/o Base
omnical may in large scale work. Tn
sheet steel plants, it measure,s., the
long, moving strip for cutting, and
rhythmically orders the .big shears to
do their work. When. an automatic
process machine becomes clogged, Vie
eye stops the machine and prevents ex-
pensive breakages. In giant stamping
machines the eye protects the oper-
atoa If this hand blocks the little
pencil of tight, the Jaws are suspend-
ed until the hand is safely with -drawn.
No otter Inalechamlical coatrivance
can count as fast as the electric eye.
Colder, for instance, a 40sineth width
of cloth several miler long zipping a-
long between rollers. Some times
one aide starts creeping up on the
other. If the "skew" as not corrected
immediately, damaged material re-
sults. Put a phototube over ,,each
edge of the cloth, and It will count
the 'crosswise threads, as they speed
by, even at 10,000 threads ' a secon.d.
If the total of the two counts begin
to vary, the eye signals a mechanism
which straightens the cloth instant-
ly.
, The fact that the electric eye will
discriminate between color vibrations.
as well ail between light and shade
has made it invaluable for standard-
izing ' paints, inks and d'yes. In a
simpler application, dt will separate
'the brown eggs preferred by Boston»
lane from the white ones popular in
New York; or inspect oranges and
throw out the green ones. Brewers,
makers of soft drinks and oil refinery,
.put the beam through a pipe where
liquid is contlimeasly flowing, A
change in color, indicating a change
in quality, is reported'at once. In-
stalled' In a factory chiron'ey, the eye
measures the density of the smoke
• and reports,. it to the engine room,
where the fuel • supply is' regulated.
As a smoke detector in warehouses
and ships it prevents fire losses.
It is stated that In collating and
sorting operations alone the eye
could replace several million' work-
ers, a possibility with social and ec-
onomic implications not to be ignored.
A big warehouse which used to em-
ploy a large force of girls to sort
beans by hand- now depends entirely
upon the eye, which" never misses "n
speckled: ,bean or a pebble."A ligat
beam over a scale bar where pack-
ages are'filled automatically will stop
the flow of 'material when the proper
weight is teaChed. When packaged
goods move down a conveyor belt,
the beam 'can weed out imperfect ca -
tons.
The
The basic principle of this marvel-
oue device was discovered accident -
ay in 1887 by the physicist Heinrich,
Hertz in MS experimeats with ,wire -
leas,. While passing electric current
across a spark gap, he found that ult_
raviolet light, coming from a 'piece
of burning magnesium wire and fall-
ing mipon the spark gap, increased
the .diseharge.
What he -stumbled upon was the
fact that when light, of any sort, falls
upon metals, it upsets the electrical
balance of their atoms and releases
electrons which, since they are stag-
atiaely charged, are attracted by a
positive conductor. Later scientists
built these principles' into the photo-
elsitric calla Simply *scribed, it
iS• a glass bulb, partially lined with
potassium, which is very sensitve to
light. A wire qonnects' this lining
with a -battery; and another wire from
the battery connects with an upright
terminal 113: the middle of the bulb and
nothing happens. But turn -a flash-
light on the bulb welt the electrons
jump madly from the potassium td the
positve terminal in • th,e middle.
Connect a meter to one of the wires
and you will see that a tiny current
is flowing - and the stronger your
light. the stronger the current.
Until 1924, however, the curnlit
that could, be produced was only about
on -e. tenibillionth of what it takes to
run -an ordinary household bulb. At
that time Dr. Herbart Eugene Ires, of
the Bell r Telephone Laboratories,
found that this anemic current could
be 'multiplied ,a few million times by
merging the photoelectric cell with
Lee deForest's amplifying vacuum
t.ube. The result was the first com-
mercial' application of the photoelect-
ric cell ,-- Sending .photegraphs over
telepbone wires.
The picture to be transmitted was
wrapped around a cylinder, which re-
volved in a lightproof metal- case. A
Carriage bearig the electric eye and
a thin pencil of light -slowly travelled
over the cylinder, like the needle of
an o1 fashioned phonograph record.
The eye scanned the narrow,' illumin-
ated band of the photograph, and its
sensitive electronic current varied in
strengta with, the lights and shades
of the picture. , In the receiving ma-.
chine, a reverse process acted upon a*
photographic film; causing exposure
coineiditg with the. variations in CUT-
rent,and the building up, line by line,
a reproduction of the original picture.
It was the electric 'eye also that
brought in the "sound track" talking
pietture film, -supplanting the bulky
records used in the first talkies.
The future of photoelectric. devices
apparently depends- only on man's
imagination.' For instance, there is a
hydroelectric substation in the South-
west over which the eledtrie eYe has
complete charge.. A specially made
graph allows the varying lead er eked-
tricity annually needed throughout
electale eye methodlea releases the
the. day. Followgra this, the
Following graph,
ateount of water. n#,edett to generate
current from hour hOur. ., And a
machine has been reported whiCh. will
semi a drawing .photteleetridallY;
translate its 14nes lint°. the movelitenta
of eating tools, and.eject the finished
Part. •
We .can. be .sure 'that robots.qf Sitiu
liar Significance ate of the way.. Led
forth froth the atomic Cave Of 'rayeterA
les and harnessed
the photoeleetricLt flA»e
now yffiltettinett tlf, •
..„
Peet 9tce10400..l1;' t0 tIlls4,44
andtiel worge..44c*IMitilw.411*y lOvey),
Seasia talbatilatedl therefOr, a 11;
Re0P200.tal Ncla rank taid. naMe
Na,Me and: detaile VnIftp.
:OOMPasay or Seetien, Saliadrea,
Battery, olding Unit,
Name of Regiment or Bra,n0.11 of
Service
Canadian ArMY Overseas..
For exaMple: •
K-5937, Pte. john
"13" Company,
Seaforth Highlanders of Canada,
Caltadian Army Overseas.
B-12345, Cpl. A. J.. Joaes,
10t Anti -Tank Regiment,
Royal•Canadiaa Artillery,
Canadian Army Overseas.
a a
0141ithe:no7 bo the firat
*lee. Wee yom
704 040011,,,
Int -St ifl"1,90 IlMaiwn4" We)** WW1
to cenectilerhich000001a Mthehrit
, sips of Sockiwha.00Plieafidi* to NO*
Kidney P4li4er Over hilt e."^keitury the
liwrite1'0141/ fp Kidpo.gments, 107
Doddis Kidney. Pills
M-54321, Sigma. John Smith,
No. 3 COMPanY, 2nd Dila Signals,
Royal Canadian Carps .of Signals,
, Canadian Army Overseas.
Note. -If a soldier is Overseas the
word "Overseas" must appear in the
address, but no place name.
Mail For Delivery in Canada
.The usual complete particularsi-
regimental nuanber, rank and name and
details of unit and name of regiment
or branch of service, and, in, addition,
the Post Office name of the place in
Canada where the soldier is stationed,
must be given.
" For example:
C-13962, Pte. Joseph Wood,
No: 7 Field Hygiene Section,
, Royal Canadian Army, Medical Corps,
Debert N.S.
•
G-12345; •Cur. john Jones,
15th Heavy Battery,
Royal Canadian Artillery,
Saint Jobin, N.B.
Note. -If a soldier is 'ins 'Canada, the
Leine of the place at which he is sta-
tioned must appear -in the address.
The regimental numbers and names
given .in the examples are, of course,
fictitious and are milerely used to il-
lustrate the correct method of ad-
dressing mail. • -
Until such time as the new method
of addressing becomes generally
knoarn, mail •bearing the designation
"C.A.S.F." will as heretofore be de-
spatched to destinations, but the pub-
lic Should immediately adopt the new
method whess addressing letters, .pais
cels and other mail to members of
the Canadian Army, either Overseas
or stationed in Canada.
•
Originality
The merit of originality is mat nov-
elty; it is sincerity. The believing
man is the original raan.-Carlyie.
• Courtesy
Courtesy is the child of good will,
and when you have in your heart
good wil toward the world, the world
will have its good will for you. -Mar-
den.
, Vision
There has not been a sing -le day
since the world began when the sun
was not 'shining. The trouble has
been with our vision. -Max.
Good Work
All who have meant good work with
their whole heart, have done good
ork, although they may die before
they have time to sign it. --R. L. Stev-
enson.
Nobility - •
ER is not wealth or ancestry, but
honourable conduct • and a noble dis,
Position that make mon great. -Ovid.
•
Conductor: , "He* old is your little
boy?"
Mother: "Four."
Condxino.r: How old are you: lit.
t10bo?"
Boy: "Four."
Conductor: "Well, madain, I'll let
him ride this time, but when he
grows up . he'll either be a liar or a
giant."
"I didn't insult her. I merely said
that if looks could kill, it would be
suicide for her to use a mirror."
LONDON and WINGHA1VI
NORTH
Exeter
Hensel'
11<lOPen
Brucefield
Clinton
Landesboro
Blyth
Belgrave
'VVingham
SOLTH
A.M.
10.34
10.46 -
10.52
11.00
11.47
12.06
12.16
12.27 -
12.45
P.M.
Wingham 1.50
Belgrave 2.06
Blyth 2.17
lonclesboro 2.26
Clinton
Brucefield ' 3.28
Kippen 3.38
Hensall 3.45
Exeter 3.58
C.N.R. TIME TABLE
• EAST
•A.M. P.M.
Goderich • 6.15 2.30
Holmesville • 6.31 2.48
Clinton. "6.43 3.00
Seaforth 6.59 • 3.12
St. Columban 7.05 3.23
Dublin 7.12 3.29
Mitchell •7.24 3.41
W EST
Mitchell •11.06 9.28
Dublin 11.14 9.36
Seaforth 11.0 9.47
Clinton 11.45 10.00
Goderich 12.05 10.25
C.P.R. TIME TABLE
EAST
Goderich
Menset
McGaw
Auburn
Blyth
Walton
MdNaught
Toronto
W EST
A.M.
Toronto 1 8.3.0
McNaught • 12.03
Walton 12.13
Blyth •12.23
Auburn • 12.32
McGaw 12.40
Menset 12.46
Goderich • 12.55
P.M.
4.20
4.24
4.32
4.42
4.52
5.0a
5.15
9.00
crkeSNAPSHOT GUILD
MAKING PICTURE -STORIES
• • •
44
aaasasasaaaasasaaaSaiaalaaaasaa
This
shot is, from our "baking bin
world to tell a
ulta" sequen6e-the best"way. ip 420
story in pictures?
thing interesting to do. We milde A
sequence last week, shoring how
she learned to '•bake biscuits. We
pictured tier measuring. out the
flour, kneading the dough, 'rolling it
out, cutting thebismilts, sliding
them into the oven -and, finally,
taking 'a big bite out of the Bret
ohe. It's a good story.
• That outline, incidentally, le typi-
cal of our snapshot secptences. Just
a step-by-step aeconnt of things the
children do. Jack, building an air
-
Plane model or packing his knap-
sack for a hike; Ann, learning how
to roller-skate, or how to Mike it
rag doll. And they hate already
made one story sequence of
me -
loading my pipe, lighting it, Sitting
down with the eVetaingpaper, puf-
ing away as I read, and ibtallY doz-
ing off. Pretty good pictures, too,
for yetingsterti.
tett thOuld.trY this Idea, of Snap -
,shot sequences, 11' YOU haven't al-
readY. There's fun in it -and the
pictures Are more interesting be.
tense thy' fittogetheatta tell a tea
at00- 313 •John van artildo
DICTIMMTAX/NO is- a lot more
fun, for the subjects, if tile pic-
tures have a story to tell. At our
house, we do it this way. First, I
pick two "story" ideas -one for Ann
to be the model, another tor Jack.
Then I jot down notes for six or
eight pictures' that will tell each
story -picking the high spots, of
course.
To decide 'which story -Anil be
pictured first, we total a coin. If
Ann wins, it's her story and elle to
the model, whild Jack and I take
the pictures. Actiallaa I Suppose,
I do meat of it -placing the
setting the camera, and so on -but
I try to let Jack feel that he's real-
ly the "director." We tell Ann what
ist, de, for paoh abet -and usually
the whole picture aeriett is made in
a short tithe. The follewhig eVe-
Mtg. it's SUIT'S tram Mt model; and
Ann helps me shoot.
-Seruetinies invite the text -
door" iteiglitiolos° little girl over, as
niodel,So that both leek and Ann
ean, help.subervise.' She
Mho,' ustorso idea givens her eoute,