Improvements in or applicable to Carriers for Pneumatic Tubes.
Year: 1893

page_text: Date of Application, 5th Oct., 1893
Complete Specification Left, 2nd July, 1894-Accepted, 11th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in or applicable to Carriers for Pneumatic Tubes.
We, GEORGE WILLIAM HOOк, of 139, Acre Lane, Brixton, in the County
of London, Telegraph Engineer, and ROBERT NICOL REID and JAMES REID,
trading as Reid Bros. of 12, Wharf Road, City Road, in the County of London,
Electrical Engineers, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in or applicable to carriers for pneumatic
tubes.
In the existing form of carrier the air wad is formed of a disc of felt, of the same
size as the internal diameter of the tube, at the buffer end of the carrier; this disc,
or air wad is harsh, it soon wears away with friction, and allows an escape of air
to pass the carrier.
In carrying out our invention we reduce the size of the felt wad, and place a
fringe, or skirt, of some suitable yielding material such as wool, round the body
of the carrier at any point most convenient for handling. This skirt or wool
fringe, being pliable and elastic reduces the amount of friction, and more effectually
prevents escape of air past the carrier.
By the use of our improved carriers we obtain the following advantages over
the carriers now in use, viz. :-less friction, increase of speed, economy of power
and dispersal of moisture in case of condensation of air in the tube.
By the use of our carriers we also find that the inner surface of the tubes
becomes clean and bright.
Dad the 5th day of October 1892
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or applicable to Carriers for Pneumatic Tubes.
We, GEORGE WILLIAM HOok, of 139, Acre Lane, Brixton, in the County
of London, Telegraph Engineer, and ROBERT NICOL REID and JAMES REID,
trading as Reid Bros. of 12, Wharf Road, City Road, in the County of London,
Electrical Engineers, 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 improvements in or applicable to carriers for pneumatic
tubes.
In the existing form of carrier the air wad is formed of a disc of felt, of the
same size as the internal diameter of the tube, at the buffer end of the carrier;
this disc, or air wad is harsh, it soon wears away with friction, and allows an escape
of air to pass the carrier.
In carrying out our invention we reduce the size of the felt wad, and place a
fringe, or skirt, of some suitable yielding material such as wool, round the body
of the carrier at any point most convenient for handling.

page_text: To enable our invention to be fully understood we will describe how it can be
carried into effect by reference to the accompanying drawing, in which :-
Figure 1 is an elevation of a carrier for pneumatic tubes constructed according
to our invention.
Figure 2 is a longitudinal section of a portion of a pneumatic tube shewing the
position the fringe of our improved carrier takes as it is being inserted in the tube;
and,
Figure 3 is a similar view but shewing the position the fringe of our carrier
assumes during its passage through the tube.
a is the usual body of the carrier; the felt wad of the same at the buffer end
of the carrier and which is of slightly smaller diameter than that of the pneumatic
tube c; and d is the fringe or skirt of yielding material such as wool which we
place round the body a of the carrier and which fringe in the drawing is shewn
placed at the rear end of the carrier but it may be placed in any other suitable
position. When the carrier is being inserted in the tube the fringe d yields as
shewn in Figure 2 and finally becomes compressed as shewn in Figure 3 and being
pliable and elastic reduces the amount of friction and more effectually prevents
the escape of air past the carrier than is the case with the ordinary felt wad
hitherto in use.
By the use of our fringed carriers we obtain the following advantages over the
carriers now in use, viz. :-less friction, increase of speed, economy of power and
dispersal of moisture in case of condensation of vapour in the tube, the inner
.surface of the tubes becoming clean and bright.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. A carrier for pneumatic tubes provided with a fringe or skirt of yielding
material, substantially as and for the purpose hereinbefore described.
2. The manufacture and use of the improved carrier for pneumatic tubes,
substantially as herein before described and illustrated in the accompanying
drawing.
Dated the 2nd day of Jul. 1904
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.