94

(f) An apparatus that is not complicated, for signalling
when the entire train, including the very last car, has passed
the switch points.

(.9) A system of weighing that will permit of the weighing
of cars in motion, whether detached or in a train.

(it) A proposition for the simplification of the accounts of
the interchange of rolling stock.

If in any of the three groups the commission cannot decide
on the allotmentof the first or second prizes to any invention
or improvement that has been presented for its consideration,
the examining commission can divide the sum allowed for this
first or second prize in the group in question, so as to grant
several second or third prizes. Furthermore. the sum allotted
to any one group may be divided among the others.

The conditions are as follows :

1. Only those inventions and improvements are admissible
that have been brought out during the term specified below.

2. To be admitted to the competition,
theinvention or improvement must have
been put into use before application upon
one of the railroads forming a part of
the Verein of German railways, and the
request to enter the competition must be
seconded by this railroad.

3. The project must be accompanied
by a detailed description, together with
drawings and models, etc., so as to con-
vey to the judges a complete knowedge
of the kind and nature of the device, the
possibility of its operation, and the effi-
ciency of the invention or improvement
in question.

4. The obtaining of a prize shall not
prevent the inventor from exploiting or
soliciting a patent. Furthermore, each
candidate for a prize for inventions or
improvements must submit to the ofiicers
of the Verein a statement of the condi-
tions upon which he will concede to it
the right to use the invention or im-
provement.

5. The Verein has the right to publish
the successful inventions.

6. All literary works submitted must
be in triplicate. One of the copies will
be placed in the library of the Verein,
the other two will be returned to the
candidate if he shall make a formal ap-
plication for them.

7. The applications must contain the
proof that the inventions and improve-
ments have been brought out and the
literary works published during the period named below. A
commission composed of twelve members will be appointed
by the Verein to examine into the projects that are presented,
and decide whether the prizes are to be awarded and to whom.
The first award will embrace all inventions and improvements
that have been brought out between July 16, 1887, and July
15, 1895. Therefore all inventions and improvements that
are to be presented to the commission must be executed before
the date mentioned. The same statement also applies to all
literary works. All applications should be sent, free of all
charges, to Kranoid, in care of the Verein, at No. 3 Balin-
hofstrasse, S. W. Berlin, Germany, between January 1 and
July 15, 1895. A

ARMSTRONG PIPE-THITEADING AND CUTTING-
OFF MACHINE NO. 2-}.

 

STEAM-FITTERS and others having to do with the cutting
and threading of pipe will find in this machine ‘a most con-
venient tool built for their especial line of work. It is an
improved form of the No. 2 pipe-threading and cutting-‘off

. machine for hand or power, built by the Armstrong Manu-

facturing Company, Bridgeport, Conn., and retains the many
attractive features of that machine in addition to others pecul-
iarly its own. It is very compact, rigid and durable, and
does not require the services of a skilled operator. All of the
gears and working parts are enclosed in an oil-tight chamber,
which insures their perfect lubrication, and effectually keeps
out dust, dirt and chips which might otherwise get to them
and thus interfere with the perfect working of the machine.

In one particular this machine differs essentially from all
other pipe-cutting and threading machines of its class built
by the Armstrong Company. In its operation the pipe re-
volves instead of the dies, being held securely by tight-grip
ping chucks.

THE AMERICAN ENGINEER

[February, 1895_

For radiator steam coil works, etc., and other services
where the greater number of pipes are of comparatively short
lengths, this will be found a particularly desirable il.I‘I'ano~e.
ment. The dies and cutting-oil" tool are held stationary, (fad
are opened and closed by means of a double-geared crank.
handle, as shown. Expanding dies are used in connection
with a self-centring and powerful gripping chuck, insurin
speed in cutting off and threading a pipe. They are furnished
to thread from 1 in. to 4 in. inclusive.

Quick interchangeability of the various sizes of dies, Coupled
with a construction which permits of separate adjustment for
three different sizes, enables the operator to thread pipe to
suit all variations in ordinary fittings, and to open and close
the dies any number of times without changing the adjust.
ment. Again, either of the sizes may be used alternately
without change of adjustment, or the dies may be quickly
taken out to permit of the free passage of the pipe to be cut

ARMSTRONG PIPE-THREADING A1‘lD§[CUT'1‘lNG-OFELMACIIINE.

off, and the adjustment still remain unchanged. An objec-
tion frequently raised against machincs using expanding dies
is, “ Our men are not skilful enough to use expanding dies
without threading some of the pipe too large and some of it

' too small.”

This has been met and successfully overcome in the tool
here shown. Though the dies are quickly opened after
threading a piece of pipe, yet they may be as quickly closed
together again without the least danger of variation, unless
intentional.

The weight of this machine is about 700 lbs.; with counter-
shaft, 850 lbs. Speed of counter-shaft should be about 225
revolutions a minute.

4

Recent Patents.

FA1l.NSWOR’l‘I{’S GAS-COMPRESSING PUMP.

THE objects of this invention are to reduce the height of a
vertical machine, to facilitate access to the parts and relieve
the foundation of strains ; to reduce to a minimum the angu-
larity of the connecting-rod during the latter part of the stroke,
and to improve various details of construction.

In the accompanying drawings. fig. 1 is a side elevation of
a double cylinder compressor embodying my improvements,
fig. 2 is. a vertical section thereof, and fig. 3 is a cross-section
on the axis of the rock shaft.

The cylinders A A (fig. 2) are open at each end, and are sup-
ported by flanges (t on a suitable base, B, consisting of prefer-
ably two parts united by a packed joint, I), on a horizontal
plane. The upper portion of the base has two necks, b’, in
which the cylinders are received, their lower ends depending
into the base, as shown. The joint between the neck b’ and
the flange at is packed, so that the base forms a gas-tight cham-
1)91‘- A Pipe, B’, provided with a suitable stop valve, con.»