Improvements in Piston-rod and like Packing.
Year: 1893

page_text: Date of Application, 19th Sept., 1893
Complete Specification Left, 15th June, 1894-4ccepted, 21st July, 1894
PROVISIONAL SPECIFICATION.
Improvements in Piston-rod and like Packing.
HENRY REES CURRY 12 Clifford Street Paisley Road Glasgow Representative
for Fields Patent Packing Co. Glasgow, do hereby declare the nature of this
invention to be as follows:-
This invention has for object to provide a combination metallic piston-rod and
like packing of simple construction and posessing greater lasting power than
metallic packing as heretofore manufactured.
The packing according to this invention is a combination of white or other metal
and asbestos or other composition.
The metallic body is a strip of metal wedge shape in its cross-section, the
tapered part in the cross-section being split or cut V shape forming as it were a
comb, the thickest edge which bears on to the piston rod being left intact.
This strip of metal is worked or woven with asbestos or other composition in a
zig-zag-Grecian, wave, circumfrencial or other forms, forming a square or oblong
packing of any length, and as an extra security to hold the strip in its nominal
position the teeth are slightly clenched at the back.
When placed in working position the cross-section of the strip of metal always
stands at right angles to piston rod or slide spindle for which it is used, therefore
it is obvious that unless the tapered edge of metal was not cut or divided it would
not allow the packing to be bent round rod.
The strip being wedge shape the thickest part of which hears upon rod at right
angles when in position upon tightening gland forces and keeps metal upon rod.
Dated this 18th day of September 1893.
HENRY REES CURRY.
COMPLETE SPECIFICATION.
Improvements in Piston-rod and like Packing.
I, HENRY REES CURRY of 12 Clifford Street Paisley Road, Glasgow, but now
of Scarsdale, Cathcart, in the County of Lanark, North Britain Glasgow,
Representative for Fields Patent Packing Coy. 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 Piston rod and like Packing, and has
for its object to provide a combination metallic packing of a simple construction
and possessing greater durability than hitherto the said packing may be used for
piston rods, valves and spindles and the like.
Figures and 1 are views showing how the combination is made, Figure 2 is a
section of same.
Figure 3 is a cross section and Figure 4 a front or face view of the improved
packing as ready for use.
Referring to the said drawings the packing is composed of a combination of white
or other metal and asbestos or other composition.
The metallic body is a strip of metal A formed wedge shape in cross section, as
shown in Figure 2, the tapered part a being split or cut as shown in Figure 1, or
cut V shaped as shown in Figure 1A, so as to form a kind of comb, the base or thick
edge a' of the said strip A which hears upon the piston or other rod being left
[Price 8d.]

page_text: intact. The said strip A of metal is worked or woven, by any suitable means, with
asbestos or other composition B in a form as shown in Figure 4, that is to say, in a
zig-zag Grecian wave, or it may be of a circumferential or other form, thus forming
a square or oblong packing of any length in which the teeth or cut portions a of
the metal strip A are preferably clenched at the back so as to retain the strip A in
its normal position.
The whole arrangement is such, that when placed in working position the cross
section of the strip of metal A always stands at right angles to the piston or
other rod for which it is used, it will therefore be obvious that unless the
tapered edge a of the metal strip A was not cut or divided it would not permit
of the packing being hent round the piston or other rod and caused to bear
upon the same by the tightening up of the stuffing box gland.
The strip of metal A, owing to its sectional wedge shape, is when placed in
position caused to have its base or thick edge a' forced and kept against the
piston or other rod.
In some cases if desired, and as is shown in Figure 3 of the drawings I may
combine with the said metal strip A and asbestos an india rubber or other soft
material strip C so as to the more effectually secure of the base or thick edge a
of the metal strip A being kept in close contact with the piston or other rod
for which it is used.
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
1st. The combination of white (or other) metal and asbestos (or other material,)
constituting the improved packing for piston rods and the like, substantially as
herein before described and shown in the drawings.
2nd. In packing for piston or other rods, the employment of a strip of white or
other metal of a wedge shape in section, having its tapered edge cut into a comb
formation, in combination with asbestos or other material, substantially as and for
the purposes hereinbefore described and shown in the drawings.
Dated this 14th day of June 1894.
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicant's Agents.