Year: 1888

page_text: Date of Application, 27th Feb., 1888
Complete Specification Left, 18th Sept., 1888
Complete Specification Accepted, 9th Nov., 1888
I, LUDWIG BLATT of Kannstadt in the Kingdom of Württemberg, Empire of
Germany, Mechanician, do hereby declare the nature of my invention to be as
follows:-
This invention relates to pipe connections or couplings for pneumatic brakes and
the like. The stand pipes to be connected by a coupling are preferably each connected
by a horizontally revolvable joint to a short standing length of pipe, laterally bent and
connected by a vertically revolvable joint to another length; these two last respective
pipe lengths are therefore each movable with vertical as well as horizontal swing.
They may be coupled at their ends to each other by a suitable coupling or union as
at present employed, or they may carry additional lengths revolvably jointed to them,
said additional lengths being coupled together. For the revolvable joints the following
construction may be used: The ends of the pipes are flanged, one flange preferably
overlapping the other; in said flanges are cut circular channels of any convenient
form of cross-section; a ring of rubber or the like of corresponding cross section is
inserted between the flanges, the diameter of the ring being preferably slightly smaller
than that of the channels in the flanges. Around one flange are cast three or more
tubular sockets, and in the same are placed screw threaded bolts having hooked ends
projecting over the opposite flange; the bolts are fastened down by nuts, springs
being also inserted in said tubular sockets for holding down said bolts.

page_text: COMPLETE SPECIFICATION.
Improvements in Pipe Connections for Pneumatic Brakes and
the like.
I LUDWIG BLATT of Kannstatt in the Kingdom of Württemberg, Empire of
Germany, Mechanician 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 pipe connections or couplings for pneumatic brakes and
the like. The stand pipes to be connected by a coupling are each connected by a
horizontally revolvable joint to a short standing length of pipe laterally bent and
connected by a vertically revolvable joint to another length, these two last respective
pipe lengths are therefore each movable with vertical as well as horizontal swing.
They may be coupled at their ends to each other by a suitable coupling or union as at
present employed or they may carry additional lengths revolvably jointed to them,
said additional lengths being coupled together.
For the revolvable joints the following construction is used. The ends of the pipes
are flanged, one flange preferably overlapping the other; in said flanges are cut
circular channels of any convenient form of cross-section, a ring of rubber or the like
of corresponding cross section is inserted between the flanges, the diameter of the ring
being preferably slightly smaller than that of the channels in the flanges. Around
one flange are cast three or more tubular sockets and in the same are placed screw
threaded bolts having hooked ends projecting over the opposite flange, the bolts are
fastened down by nuts, springs being also inserted in said tubular socket for
holding down the bolts.
Fig. 1. of the accompanying drawings represents in side elevation the improved tube
connection with vertical and horizontal movement.
Fig. 2 shows on an enlarged scale one of the joints in longitudinal section.
Fig. 3 is a portion of the plan of fig. 2.
Each of the pipes A provided with cock B carries above the latter a horizontally
revolvable section connected thereto by the joint D. The joints E have the same
construction as the joints D and serve for the vertical movement.
The elbows of the joints are respectively connected by pipe sections C.
The two halves of the coupling may be connected together by unions usually
employed for Westinghouse brakes or the like.
As shown in Fig. 2 the joint consists of two flanged elbows, the flanges of which
are fitted together the one being recessed to receive an overlapping rim on the other
so that on the movement of the joint the revolution takes always place about the same
axial centre. At the same time dust etc. is prevented as much as possible from
penetrating between the surfaces. The opposing surfaces of the flanges H and J are
turned out semicircularly so as to form an annular space with circular cross section
when the flanges are placed together.

page_text: The cross section of this annular space may also be of any other suitable
shape.
Said space is filled up with an indiarubber ring O of the same cross section, but of
slightly smaller diameter. The ring owing to its smaller diameter and its elasticity
tends to contract, thus completely tightening the two surfaces of the flanges H and J
without thereby impairing the movability of the joint by excessive friction.
To one of the flanges, for instance J, three tubular sockets F are cast at equal
intervals, being connected by means of ribs f with the elbow.
The sockets F carry in their upper part quadrangular holes for receiving and
guiding the bolts G, a spring K is introduced from below into each of the said sockets
and rests upon a base therein, this spring presses on the nut L of the bolt G. The
hook N of the screw G lies on the upper annular, turned surface of the flange H and
surrounds the elbow to a certain extend, as shown by Fig. 3. Said hook is pressed
down by means of spring K and nut L.
When turning the joint the lower surface of the hook N slides on the upper surface
of the flange H, the two flanges H and J being pressed together with more or less
power by the spring K and nut L, the elastic ring O forming a secure packing. The
nuts L are secured by pins M against loosening.
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 what I
claim is :
In pipe connection for pneumatic brakes and the like.
1) The combination with the stand pipe A of a horizontally revolvable jointed elbow
on the upper end thereof, a vertically revolvable pipe section connected to said
elbow substantially as and for the purpose set forth.
2) A revolvable joint for the connection of sections of pipe comprising in combina-
tion two revolvable elbows having flanges one overlapping the other, rubber ring O
and hooked bolts N G connecting said flanges substantially as set forth.
Dated this 18th day of September 188d.
Dated this 18th day of September 1ddd.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.