Year: 1895

page_text: A communication from THEOPHILE PRIOUX, 156 Rue Oberkampf, and CHARLES
PRIOUX, 229 Rue du Faubourg St. Antoine, Engineers, and CHARLES
HUGOT, Locksmith, 90 Rue Notre Dame de Nazareth, all of Paris, in the
Republic of France.
1, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:-
This invention comprises an improved means of soldering together with pure tin,
tubular articles of aluminium and steel, or any other metals; ie. the soldering of
two different metals together, or of a metal with itself, without having recourse to
autogenous soldering or compound soldering as now daily practised.
Taking as an example the joint or union of three tubes as in a cycle frame
soldered to as many stays or tension-rods.
The joints are tubular and may be of any section. The hollow socket has three
tubular arms, in this case all cylindrical, only differing in diameter; internal
circular grooves are cut therein, which may be equidistant or not, circular or
spiral and either right or left-handed, in combination or each one separately.
The hollow tubes have their surfaces of penetration, slightly coned or tapered
off, in order to facilitate entry and to leave room for the tin-solder in the vacant
spaces between the cylindrical sockets and the coned tube-ends, as well as in the
series of small grooves.
Internal cylindrical sleeves, of a thickness of metal somewhat greater than that
of the frame-tubes, are forced into the said tube-ends, so as to compress the tin-
solder in the interstitial conical space, into the grooves inside the cylindrical
sockets.
In this manner all these parts are soldered and wedged up, by the forcible
introduction of the internal cylindrical sleeves; and there can consequently be no
loosening, dislocation, or separation of the parts thus fastened.
Finally the great advantage of the improved system of soldering with pure tin
consists in the avoidance of the annealing process with parts thus secured, which
usually changes their nature to the detriment of their strength such as cycles or
the like.
Dated this 20th day of July 1895.
BOULT & WADE,
Agents for the Applicant.

page_text: pating
A communication from THEOPHILE PRIOUX, of 156 Rue Oberkampf, CHARLES.
PRIOUX, of 229 Rue du Faubourg St. Antoine, Engineers, and CHARLES
HUGOT, Locksmith, of 90 Rue Notre Dame de Nazareth, all of Paris, in the
Republic of France.
I, ALFRED JULIUS BOULT, of 323 High Holboru, in the County of Middlesex,
Chartered Patent Agent, 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:-
The present invention relates to improvements in soldering together with pure
tin, aluminium and steel or some other metal, or any two metals with each other,
and finally any metal with itself.
These improvements consist in maintaining the pure tin solder in contact with
tubular parts joined to each other in a sleeve, which improvements aim to imprison
the solder by strongly wedging it in the above tubular parts, for the purpose of
avoiding the risk of unsoldering by electrolytic or other means, or by shocks or
vibrations which may bring about molecular changes such as to produce
dislocation of the joints of the said tubular pieces.
The accompanying drawings represent examples.
Figure 1 shows a socket with three branches for joining the steering head of a
cycle with the framing.
Figure 2 shows a plan of Figure 1.
Figure 3 shows a cylindrical socket joining two tubes of equal diameter.
Figure 4 shows a cylindrical socket joining two tubes of unequal diameter.
In Figure 1, it is to be remarked that the three branches a, b, c, of the socket d
may be of equal or unequal diameters, corresponding to outer diameters of tubes
entering into the branches abc of the socket d.
The mode of making the joint is the same, as will be hereinafter explained,
except for the inner grooves.
It will be seen in Figure 1 that the inner part of the branch a is cylindrically
drilled and small grooves e are formed on the inside in any known manner, parallel
to each other, and equidistant or not as desired. If preferred the grooves may
be arranged helically, either right or left handed as g or f, in the branches c and b
respectively; but whatever may be the shape of these grooves e, f, g, they are
destined to retain a part of the pure tin solder, which enters into them.
The tubular part h of the frame is tapered or made slightly thinner at the end
in order to facilitate its entering into the socket a, thus leaving a very small conical
space in addition to the small grooves e, f, or g, between the tube h and the socket d,
and it is in this conical grooved part, indicated by curved arrows s that the tin
solder is placed; a hollow sleeve of sufficient thickness is then forced in; this sleeve
is slightly tapered exteriorly, as shown at k, so as to constitute a conical wedge
the taper running in the opposite direction to that of the end of the tube h.
Finally, by the aid of a suitable mandrel, which is introduced in the tube in the
direction of the arrow j, the hollow sleeve k is forced in and expands the end of
the tube h or the end of the tube / may be expanded by other suitable means, su
as to wedge in the pure tin solder, contained in the small conical space and in the
small grooves e, f, or g, and thus screen it from atmospheric influences, for
instance.
The tin solder is therefore compressed and fixed and cannot come out, and is
protected against any exterior contact, forming a complete joint of the tube / with
the branch a.

page_text: Figures 3 and 4 show the method of joining tubes of equal and unequal diameters.
respectively; in which it is obvious that the manner of soldering is similar to that
described above with reference to Figures 1 and 2; similar letters indicating the
corresponding parts.
Having now particularly described and ascertained the nature of this said inven--
tion as communicated to me by my foreign correspondents, and in what manner the
same is to be performed, I declare that what I claim is :-
1. A method of making soldered joints which comprises the operation of
permanently expanding one of the soldered parts to cause the solder to engage or
interlock with the other soldered part, substantially as and for the purposes
described.
2. In a joint for tubular articles the combination of one member such as d grooved,.
with another such as which is not grooved, but tapered and is permanently
expanded by a conical wedge such as k or otherwise substantially as and for the
purposes described.
3. A soldered joint for tubular articles wherein the solder is screened from
atmospheric influences substantially as and for the purpose described.
4. A joint for tubular articles substantially as and for the purpose described.
and illustrated in Figures 1 and 2 or Figure 3 or Figure 4 of the accompanying
drawings.
Dated this 23rd day of March 1896.
BOULT & WADE,
Agents for the Applicant.