Year: 1888

page_text: Date of Application, (in United Kingdom) 20th July, 1888
Complete Specification Left, 20th July, 1888
Complete Specification Accepted, 14th Dec., 1888
I, GEORGE CUMMING, Engineer, of San Francisco, State of California, United
States of America, do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and by the
following statement :-
This invention relates to those portable forges the various parts of which may be
taken apart and carried from place to place to be afterwards put together and
operated with similar effect and as conveniently as a stationary forge of equal
capacity.
The invention consists :-
1st. In the form and arrangement of the several parts of the forges and the method of
securing them together so that great strength and durability with lightness and
portability is secured, the operation of taking apart and putting together again may
be conducted with great facility, and the apparatus may be kept in good order and
cleanly condition without difficulty or delay.
2nd. In a certain improvement in the form and arrangement of the shell toothed
gearing, spindles, etc., of the blower producing the blast for the furnace as will be
more fully set forth below.
--
In the accompanying drawings which form a part of this specification
Fig. 1 is a transverse sectional elevation of the forge taken immediately in front
of the supporting legs and passing through the centre of the hearth.

page_text: Fig. 2 is a side elevation of the forge.
Fig. 3 is a sectional elevation of the forge taken at a point in front of the supporting
legs and clamp which enclasps the horizontal wind conduit but back of the centre
plate of the hearth.
Fig. 4 is a front elevation of the blower upon a larger scale than in the other
figures.
Fig. is a cross sectional elevation of the same and
Fig. 6 is a back side view of this same blower.
Fig. 7 is a plan of the wind pipe showing the oblong holes into and out of which
the blast passes from blower to forge.
Fig. 8 is a sectional plan of clamp H illustrating the method of keeping the legs in
the hubs thereof.
Fig. 9 is a sectional plan of the clamp J.
In all the figures the same letters of reference are used to indicate the same
parts.
In figures 1, 2 and 3 A is the hearth made of a sheet iron rim a fastened to
a bottom plate a¹ by rivetting an angle iron a² to. both; A' is the back part of
the hearth which fits on the upper edge of the rim and is held in place by little
clasps b.
The interior of the hearth is plastered over with clay A³.
B is a horizontal tube giving communication between the blower C and the centre
opening in the hearth (see Fig. 1); each end of this tube is plugged up with
wooden plugs D, and at the proper places holes c and d are provided in the upper
surface of the tube, one hole where the blower is set and one hole where the hearth is
secured to the tube (See Fig. 7).
.
E, is a circular flange or saddle rested upon the tube B, just over the
hole, d.
e, e are two bolts with thumb nuts e¹, e¹, at lower end and F is a clamp iron fitting
underneath the tube; the bolts pass through the bottom hearth plates, the saddle
piece E, and the projecting ears of the clamp iron F as in Fig. 1, so that when the
thumb nuts are screwed up tightly the hearth will be firmly bound upon the tube B.
In the centre of the saddle piece, there is a small perforated disc f, through which the
air is forced into the fire by the blower to be distributed in radiating jets in the usual
manner.
G is the blower which is fastened on the tube B, in similar fashion as the hearth
pan is fastened. The lower edge of the shell of the blower has a concave surface
fitting the surface of the tube, two lugs g, projecting from each side, g₁ is a
clamp piece passing across the tube B underneath (see figs. 2 and 6) and two
bolts with thumb nuts on lower end connect between the lugs on the blower and
the clamp, so that when the bolts are screwed up tightly the blower is held firmly in
place.
H, is a clamp in two parts, shaped as in figs. 2 and 3 their adjoining surfaces meeting
on a line running lengthwise of the tube.
Both halves of the clamp have a concave surface enclasping the tube, (see fig. 3),
and the two halves of the clamp are drawn together by the bolt h.
The lower part of the two halves of this clamp have bulbs which have holes or
recesses to receive the ends of the four legs I, I, I, I.
These legs are made of gas pipe and bent to the shape as shown in the drawing,
so that their lower part will spread out to give a wide foundation for the apparatus ;
The legs enter the hubs of the clamps about a couple of inches making a tight fit
therein. To hold the legs more firmly in position short pieces of round iron, i
Fig. 8, are dropped into the recesses in the hubs so that they stand opposite each
other and parallel with the ends of the legs bearing against them a bolt i, with
a wedge shaped head, passes between these rollers i, so that when the bolt is
screwed up so as to draw this wedge in between the rollers, they necessarily spread
them apart and press them as tightly as desired against be legs thus holding them
in position.

page_text: To further brace the legs together there are two half couplings J, slipped over
the ends of the legs before entering them in the hubs of the clamp above, a single
bolt is used to draw the two half clamps together see Figs. 8 and 9.
G is the shell within which the blower fans, K revolve.
The air enters preferably on one side only (although it may be admitted on both
sides) through the opening k; k¹ is the front cover which is removable to allow the
fans to be put in and taken out, in the middle of this cover is a hub to receive the
spindle b of the fan. At the opposite end of the fan spindle after it passes through
the shell, is a toothed spur pinion 1, the other end of the spindle resting in the recess
of the lowest boss of the back cover L.
13.
There are a train of spurgears 1, 2, 3, 4, 5, and 6, fitted on spindles b, b¹, 63, 63,
said spindles being accommodated in the bosses 1, 11, 12, The upper spindle
carries the hand lever M by which the blower is actuated the back cover L
encloses all the gears and is bolted to the shell of the blower, it also forms a
tight chamber to hold an inspissated lubricant to lubricate both gears and
spindles.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what
I claim is:-
1. A portable forge consisting essentially of the hearth pan the hollow conduit for
wind, the blower and supporting legs the whole being secured together with suitable
clamping device as herein described and for the purpose set forth.
2. In a portable forge the combination of a hearth pan securely clamped upon a
horizontal wind pipe a horizontal wind pipe conveying the blast from the blower to
the hearth a suitable blower clamped upon said horizontal wind pipe, and a
suitable stand or frame to support the whole arranged and operating substantially as
and for the purpose described.
:
3. The portable stand herein described consisting essentially of the bent legs inserted
and held in the half clamp the half clamp constructed and operating substantially as
and for the purpose described.
4. As a means of plastering the legs in the clamp hubs the combination of the
wedge headed bolt and the rollers arranged and operating together to bind the legs in
their sockets substantially as and for the purposes described.
5. In a portable blowing apparatus the combination of a horizontal hollow wind
conduit, a blower clamped thereto and a portable stand as herein described
consisting of the bent tubular legs and clamping iron substantially as shown and
described.
6. A fan blower as herein described, consisting essentially of a shell enclosing the
fan and having a removable cover in front to admit the fan perforated to allow the air
to enter and with a boss in the middle to receive the fan spindle; the said shell having
a set of bearings secured to rear side to support one end of the spindles of the speed
gears; seconda suitable revolving fan enclosed within the shell, third :-a cap or
cover with internal space to enclose the speed multiplying gears fitted and fastened
directly to the shell, and provided with bearings for the outer ends of the gear spindles,
fourth a set of speed multiplying gears with spindles and an operating hand lever
substantially as described.
Dad his 20th dow of Inly 1888