The Utah County Democrat. [volume] (Provo City, Utah) 1898-1909, 1899-04-01

regulated 10y time lock. which alIows
u Roadway OF not less than six seconds
to eacn carrier.
At the end Of the receiving tube IL n
gate, 50 arranged aud regulated as To
effecnaly close the end OF The tube.
the tube being opened 10y the impact of
the Carrier as II is shot against IL. The
air .currert passes OF continually in a
dir elton NJ right angle To the tube
through valve to the pipe which con
ducts II 10 The air tank ~ the engine !
room. The gate closes automatically |
as s0on MS the carrier has passed out
through to the receiving table outside,
similar TO the discharge Of II shell FROM
a repeating rife. The small quantity
OF air which passes out with the carrier
not being sufficient tn hold the gate
open, causes no loss To speak of. The
machinery at the sub-station Is p'acli-
cally the same ms ut Inc general post.
office, but the receiver Is somewha,
different, being arranged fer cunlinu
Gus passage OF he air without the loss
from the receiving tube TO the trans
miiter. his is ffected by means of u
sleeve placed on one end Of the receiv
ing tube. The mir current passes from
the tube tn ough The sleeve To another
tube. aud then goes to the transmitter
The carrier, when 1t arrives, passes
through gate somewhat similar IT,
that at the general pOst"ilice. into II
short piece of tubing fIpm which, afer
the gate has clused, to prevent loss OF
Mr, II is dropped from The tube aud
IaIls out on the table.
The earliest practical use OF pneu
matte tubes for transmission purl uses
any of kind is noted in the system Of
one-and u half inch pipe aid In London
In 1853 These were employed for send
ing kilograms from the GENITAL station
Of The Electric and International Teie
graph company TO the London STOCK
/. xchange, a distance OF 220 yards. The
system at present in use in London Is
known as the "Rndial," that is, ON,
Genital aud several minor pumping
stations having been established, iron
these the tubes radiate. The outgoing
tubes are operated by compressed air
the Incoming tubes by exhaust. thre'
inch tunes are used.
The London system includes forty
| A flirf IA miles
tubing. Liverpool, Manchester. Birm
inpham. Glasgow, Dublin aud New
castle are also equipped with pneu
matte tube systems for TRANSPORTING
mail. The city OF Berlin has an eS
tensive radial system. In Paris tn
, pneumatic tube system was first intro
duced IN 1865. The first system G
pneumatic tubes for Transporting
! mail in the United States was put
/ in the city OF Philadelphia IN 1892, All
) connected the miin post"fhce win u
I sub. pusiuflice in the Bourse.
The Rand compressor resembles Nv
Of the wooden mill engines placed Sic
= by side, of $50 horse power each
l. II DE- his may be accepted ana rea
$ by some of your readers who have NJ
r had chance 10 see or even re"d
: anything OF the kline. l did 1t just
show TO what exJrnt "A two-cent siau
o system will afford.
II Would like to hear from some 9th
n 90 same subject.
lie ST. have not noticed anythi
n lately from our San Francisco corr
le spondrnt. expect he has received
n Knockout blow from his ST. uth,
,e Finny, Skinny. or Grinney. Wot
is like TO hear from them. Yours,
"A SIMPSON