Elmore bulletin. [volume] (Rocky Bar, Idaho) 1889-1906, 1895-02-16
A BIG PLACER ENTERPRISE.
rhe Great Combination steam Der
rick at Rocky Uar,

I
Next spring will doubtless wit
ness a revival Of mining work al
the good old camp Of Rocky Bar
During the past fall the Bear Creek
Alluvial Gold Company, under the
able management Of Harry Thomp-
son. expended vast sums of money
in getting their placer ground in
proper shape for profitable manipu-
lation this spring. The creek and
Hats are wedged with immense
boulders and to obtain the gold hid
den these huge rocks must he re-
moved, and to accomplish this end
Mr.. Thompson ordered Lancaster
combination hosting machine, or
portable derrick, built expressly for
service on his ground, which has
proven itself wonderful machine.
II is now used at Rocky Bar for
raising boulders and rock from the
creek and pits some 80 feet below the
loot guage railroad track on which
It travels ard works. The boom stands
at an angle of 45 degrees, aud extends
80 feet from the eenter.pin of the re.
volving holster.
The boulders are lifted from the bed
OF the creek and then run back on the
track some 900 feet from the pit and
there swung completely around and au-
Dramatically dumped by tipping one
side OF the platform by chain con
nected 10 and operated by the second |
drum OF the double drum machine.
A load of six tons and upwards in
one or more boulders is often lifted BY |
this holster from the creek by wrap-
ping chains around them or by means
OF grab hooks, and regular trips are
made with this load to the dump and
back every two minutes.
The holster is self-propelling in both
directions on either Il. 81, 8 II. or
10 f. track and has eight adjustable
wheels to suit the guage. II
rotates the platform carrying She en-.
CINE, boiler and boom together with
the load completely around upon a 7
IT, . in. turntable mounted on the steel
truck. II travels about four miles nm
hour, derricks the loaded 30 fl. steel
boom in and out and swings it around
he entire circle in 30 seconds, so that
il will pick up its load at n so II. radius
and dump it at "A 0 #. radius, or at any
intermediate distance, or vice versa,
inside the entire sixty #. circumference
Or swing of the boom.
The swinging or Slowing, .derricking
and travelling motions of the machines
are simultaneously operated and indie
reversible and it is so bal
lnced that no perceptible Earring or
rocking occurs while rapidly picking
up or dropping the heaviest load at
The extreme radius.
This 1894 Combination Lancaster"
Holster automatically works "A graphic
II y Gu. yds. on % #. boom, a II
I'd. on a 30 II. boom and a / Gu. yd.
;rapple on 20 IT, boom respectively
md makes deliveries of well filed
'ncket from n sand pit 80 feet deep, TO
;ars or scows at any point or position
within the entire radius, every five
steam shovel Of l or II Gu. yd. ca
oaciiy can also be connected to and be ,
apidly operated by one man with the
anne holster and changed from or to a ,
team crane, shovel, or grapple (clam-
hell or other style) inside Of 80 min
ties. I
This combination can also be readily ,
detached from the steel car frame and 1
transferred 10 and fixed upon the deck
Il a scow or barge and rapidly opera ,
ed from il and used either as a crane ,
u Tor working grapple or a dipper. /,
The engines are reversible and set
i slight angle to permit the compact
arrangement shown OF gears aud fric I
ions and the center pin or steadying |
'ost around which the whole machine {
o,ates. The pair of engine cylinders {
re " dia.xl2' stroke and mounted on /,
solid and compact frame which also /
arries the two winding druas and pat
mt sectional, cone-shaped wood fric
ions and their special engaging mech
nism. The rear or boiler-carrying [
nd OF the revolving platform extends |
My III II. from the center-pin of the ,
machine thus standing but # beyond
he rear end OF the II f.. steel truck. II
Extention arms or lateral supports :
re carried ut both front and rear OF Z
he truck which slide in flush when
iot IN use, and outwardly a. needed up
o n IT. in width. These four adjust
BILE s,eadying accessories are availa-
lie when rapidly lifting and swinging I
xcessive leads at a great radius. 8
Winch heads are placed on each side 9
4 the machine for general hauling ,
'urpo es. Z
Showing this morning.