IMPROVEMENTS IN THE CONSTRUCTION AND APPLICATION OF METALLIC PACKINGS FOR PISTON ROD AND OTHER GLANDS
Year: 1884

page_text: I BENJAMIN RHODES of 240 Bow Road, London, E. in the County of Middlesex,
Engineer and Brassfounder do hereby declare the nature of my Invention for
IMPROVEMENTS IN THE CONSTRUCTION AND APPLICATION OF METALLIC PACKINGS
FOR PISTON ROD AND OTHER GLANDS, to be as follows:-
According to my invention I take strips of soft metal of suitable length and
thickness according to the size of gland to be packed; and which strips may be
either round, square or triangular in section. I coil a strip of the said soft metal
closely round the piston rod or spindle to be packed. This coil is then slid down
into the cavity of the gland box and serves to form the frictional or wearing
surface of the packing. I then take a core packing, by preference being a core of
the asbestos compound packing described in the specification of my patent
N° 1334, covered with asbestos, yarn or hemp of suitable size, and fill up with it
or other suitable elastic packing, the space between the soft metal coil and the
gland box. I thus form, when the gland is screwed down, an elastic cushion or
support which presses equally against the soft metal coil, and so produce a clean,
bright tubular surface without joint or seam and within which the piston rod or
spindle works, but which nevertheless, is not so hard or rigid but that it can be
gradually compressed by the tightening up and pressure of the outer packing as the
soft metal wears away.
By the adoption of my invention I am enabled to ensure that a perfectly tight
joint is obtained, friction also being reduced to a minimum, and with the additional
advantage of great durability.

page_text: "
I BENJAMIN RHODES of 240 Bow Road, London, E, in the County of Essex,
Engineer and Brassfounder, do hereby declare the nature of my Invention for
IMPROVEMENTS IN THE CONSTRUCTION AND APPLICATION OF METALLIC PACKINGS
FOR PISTON ROD AND OTHER GLANDS "
and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement and accompanying sheet of Drawings :-
In accordance with my Invention I take strips of soft metal of suitable length
and thickness proportionate to the size of gland to be packed, and which strips
may be either round, square, or other suitable form in section. A strip of the said
soft metal is then wound round the piston rod, or spindle, to be packed, so as to
form a coil a which is then slid down into the cavity of the gland box, and forms
the frictional or wearing surface of the packing material. I then take a core of
resilient packing consisting by preference of the asbestos compound described in
the Specification of my Patent N° 1334", covered with asbestos yarn or hemp and
fill up with it or other suitable elastic packing, the intervening space, between the
soft metallic coil a surrounding the piston rod or spindle and the gland box, as
shewn at b, d, d. The under part of the gland box cover takes on to the top of
loose metal wedge pieces c; and, the bottom of the gland box is also fitted with
similar wedge pieces c¹.
By the arrangement above described, on the gland cover being screwed down
in the usual manner, an elastic cushion or support is formed which presses equally
against the soft metallic coil "packing-proper" a, which latter presents to the piston
rod or spindle which it surrounds, a clean, bright, tubular surface within which,
said rod or spindle works steam-tight; but which, nevertheless, is not so hard or
rigid but that it can be gradually compressed by the tightening up of the
supplementary resilient packing b, d, d', as the soft metal coil a wears away.
By the adoption of my Invention I am enabled to ensure that a perfectly tight
joint is obtained; friction also being reduced to a minimum; and, the additional
advantage of great durability is secured.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is :-
The use of the soft metallic coil packing a, for the purposes herein described;
in combination with the arrangement also herein described for keeping said
packing a in position and compensating for the wearing away thereof, and as shewn
in the accompanying drawing, or any mere mechanical modification thereof.
Dated this Twenty Third day of Sentember 1884