Improved Piston Ring Pliers.
Year: 1899

page_text: Date of Application, 29th May, 1899
Complete Specification Left, 27th Mar., 1900- Accepted, 26th May, 1900
Improved Piston Ring Pliers.
EDMUND JAMES DAVIS, 71, Jeffreys Road, Clapham, S.W., Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention consists of an improved way of forming the lips of the jaws
of pliers for taking off piston rings, as given in Specification & Drawing No. 15347,
dated 20th August 1892. It consists of making the lip-which holds the ring
inside from slipping off jaws of thin steel, such as clock spring steel, which is
rivetted or otherwise fixed to the jaw; a spring may be placed on each arm so
as to press against the ring, & keep the ends of ring up against the lips, & so
leave as little as possible projecting inside ring.
Where a minimum expansion of ring is essential the jaws may be made
V shape, the inner faces of the V holding the sides of the ends of ring, so
that no part projects inside the ring.
TV 11 L
1900
EDMUND JAMES DAVIS.
EDMUND JAMES DAVIS, 71, Jeffreys Road, Clapham, S.W., Engineer, 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 follow-
ing statement:-
This invention consists of an improved method of forming the lips of jaws for
pliers for removing & replacing piston rings as described in Specification
No. 15347 dated 26th August 1892. The pliers as in Fig. 1 may be made of
malleable cast iron & the lips B Figs. 1, 2 & 3 be made of steel & attached thereto.
The lip B-which holds the piston ring inside--is made of thin steel such as
clock spring or saw blade or similar metal. A piece wide say & " long is
bent at right angles as in Fig. 3 having one side-the lip B-" long & the
other side A " long; this is rivetted or otherwise fixed to the plier ends as in
Figs. & 2 having the "side B at the top & turning outward, the 3" side being
fixed at such an angle that the ends of the ring, when ring is being expanded,
slide up against the lip B, & ring may be removed from piston with a minimum
of expansion, the lip being as thin as practicable.
1
To use these pliers, say the rings of Ramsbottom type are on the piston, close
the pliers, bringing jaws A Fig. 1 together, insert jaws in gap of ring, then
keeping the lips B well up against inside of ends of ring, expand the ring by
037

page_text: opening the jaws, so that the ring, is clear of the recess in piston, & may be
lifted off. Springs may be fixed for keeping the jaws together when not in use.
In Fig. 2 the lip B is fixed by letting the part A into a sawcut so the lip B pro-
jects above the face of the jaw of pliers; it may be fixed by rivetting brazing etc.
Having now particularly described & ascertained the nature of my said
invention & in what manner the same is to be performed I declare that what
I claim is―
1. In piston ring pliers the lip of the jaw is made of spring steel or similar
metal & fixed to the pliers as herein described.
2. The lip may be let into jaws of pliers by a sawcut as described.
B. Piston ring pliers in which the face of jaw & lip as A & B Fig. 1, or lip
only as B Fig. 2, are made seperate from the pliers.
Dated this 27th day of March 1900.