The sun. [volume] (New York [N.Y.]) 1916-1920, 1919-08-10

eral times worse than that Of a Big
boiler shop! Even 80, the navigetef.9
the pilot, the engineer, the radio manA.
and other members of the crew were 81
In vocal contact every moment ofrc
those strenuous hours aloft. Not only !;
that but the radio operator could talk 6
with the companion seaplanes II with =
in a radius OF twenty-five miles, or :.
with the destroyers which buoyed the ~
route along the many hundreds c6
miles of ocean waste. Further, thor
faint signals OF the wireless telegraph, y.
coming from still farther away. could 70
be picked up audiblyl ISIS
For airpiane service there was dor
ve'oped a special headgear attachment
which kept the double receivers :
pressed snusIy over the ears and held ~
! the transmitter at the desired point In
front of the wearer's mouth, be hen,.
pilot passenger or another member OF, N
the personnel An interesting exana1iI
pie of the value CT this outfit was given.
I during the time when we had reason r.
to fear the activities of U-boats IN a
domestic, waters. Henry P. Dawson, o
Jr., Of New York city was plotting "a,
plane high in the air off the Virginia
Capes, scouting for enemy submarines.
His mechanician by chance happened
to see a drain cock drop away from
the flying machines radiator, and
promptly telephoned Dawson o. the 4
| Impending peril. The latter imme7 !
| diately started to volplane TO the seas :
! surface. where he successfully alightedS -
| with his motor damned and pretty.
nearly red hot. 20
| st'
A Boon to seafaring Men. ,g,.
AS a consequence OF its war tirreCSs
service, the Pridham-J Jensen telephone :
Is now being installed extensively
aboard the craft OF our fighting feet
and on the vessels of the United States o.;
Shipping Board, so that the man orss
the bridge and those scattered below
in noisy places can be reached in 8
stantly and perfectly by word Of
mouth. Pounding engines, rafting =
machinery Of all sorts, and the thunsh.
der of whole broadsides have no effecfd
on the anti-noise trapsmitter, while .
the sound proof, loud speaking, double :
receivers complete the cycle Of a per- a
feet telephone service. This has been
quite unattainable heretofore; on ship
board messages between the bridge and
the engine room have commonly been
exchanged by mechanical device, the
ships telegraph, which carries IN
orders usually, and only few o.
! these. Voc
It takes no stretch OF the imaginA-o
ton to conceive places where ap-
paratus of this kind would Ali a long,
felt want. For instance, in boiler =
factory, a planning mill, noisy MAST
! chine shop, a pressroom, or In the =
neighborhood Of the rumble and roar
OF a busy thoroughfare. Again, there :
are some of us who have not perfects
hearing, and, by aid of the double a
receivers and the conveniently placed
transmitter, this handicap can be 10
q great extent neutralized. 1t re-
quires only one hand to hold the ap-s
paratus in position when designed for j
use on shfpboard or anywhere in an
office, in n factory, or in the general a
run of settings familiar TO all OF us. 'V q
Another field of employment, made ::
possible by q. b. Moorehead of San
Francisco. is where the loud speaking .
receiver is linked up with audions, b,
which amplify the volume Of sound
and spread It broadcast either in a
hall or out in the open through the,
agency OF suitable megaphones. In Z.
u
despatched earthward from thousands
of feet In the air have been made
audible to immense crowds, or one
speaker or singer. without taxing the
voice. has been able to reach ana
to sway a multitude. Any person.
with even modest vision, can conjure
up score or more OF circumstances
In which apparatus OF this character
would render unique and splendid SER o
vice. Similarly, all OF ms can picture;
some of the wonderful things that the
Pridham-J Jensen telephone will render
possible 1t will be infinitely easier.
hereafter, to get better results over
'long distance" We may be thank
full that the war has given this equip
ment which win prove of the greatest
service in the busy. happy. fruitful
period OF peace. ~