IMPROVEMENTS IN THE CONSTRUCTION OF PISTON RODS AND PISTONS, AND BUCKETS AND PLUNGERS FOR TIL LUBRICATION OF THE SAME, PARTICULARLY APPLICABLE TO ENEMAS, SYRINGES, AND OTHER SIMILAR INSTRUMENTS
Year: 1877

page_text: LETTERS PATENT to James Arnold, of West Smithfield, and Edward John Guy,.
of Goswell Road, both in the County of Middlesex, for the Invention of
"IMPROVEMENTS IN THE CONSTRUCTION OF PISTON RODS AND PISTONS, AND
BUCKETS AND PLUNGERS FOR TIL LUBRICATION OF THE SAME, PARTICULARLY
APPLICABLE TO ENEMAS, SYRINGES, AND OTHER SIMILAR INSTRUMENTS."
Sealed the 31st July 1877, and dated the 1st February 1877.
PROVISIONAL SPECIFICATION left by the said James Arnold and Edward
John Guy at the Office of the Commissioners of Patents on the 1st February
1877.
$5
JAMES ARNOLD, of West Smithfield, and EDWARD JOHN GUY, of Goswell Road,
both in the County of Middlesex IMPROVEMENTS IN TIIL CONSTRUCTION OF PISTON
RODS AND PISTONS, AND BUCKETS AND PLUNGERS FOR THE LUBRICATION OF THE
SAME, PARTICULARLY APPLICABLE TO ENEMAS, SYRINGES, AND OTHER SIMILAR IN-
STRUMENTS
35
The object of this Invention is to ensure a more perfect and economical lubrication
of pistons, buckets, and plungers, but more puticularly to those for enomas and
syringes For this purpose we make the piston rod hollow, forming an oil resci von,
and form a communication with the exterior part of the piston, bucket, or plunger,
or with the packing thereof, by means of one or more comparatively fino holes This
In the
oil reservoir contains, by preference, some sponge or other porous material
interior of the piston tod may be fitted a small plunger or piston, the end of same
or its 10d passing out at the top or knob part of the large piston or plunger 1od,
and we there for in it with screw threads and knob or handle, the said screw threads
fitting in or on corresponding screw threads in oi on the end of the large piston rod
of the enema, or the top or knob part of the large piston may have the sinall
inner piston fixed thereto, and be screwed on to the large piston rod, on which
it can thus be raised or lowered there by raising or lowering the small internal
piston 1od
A small space is left between the bottom of the
and the end of the internal or small piston rod
hollow in the large piston rod
This space is filled with oil, or

page_text: other lubricant, and contains also, by preference, some porous material, as aforesaid
When the internal piston rod is forced down into this space the lubricant is forced
out through the aforesaid small hole or holes communicating with the exterior or
packing of the enema piston, thus lumicating the same, an occasional small part of
a turn suffices for the efficient and economical lubrication of the piston.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Arnold and Edward, John Guy in the Great Seal Patent Office
on the 1st August 1877
JAMES ARNOLD, of West Smithfield, and EDWARD JOHN GUY, of Goswell Road,
both in the County of Middlesex "IMPROVEMENTS IN THE CONSTRUCTION OF
PISTON RODS AND PISTONS, AND BUCKETS AND PLUNGERS FOR THE LUBRICATION OF
THE SAME, PARTICULARLY APPLICABLE TO ENEMAS, SYRINGES, AND OTHER SIMILAR
INSTRUMENTS
»
The object of this Invention is to ensure a more perfect and economical lubrication
of pistons, buckets, and plungers, but more particularly to those for enemas and
syringes For this purpose we make the piston rod hollow, forming an oil reservoir,
and form a communication with the exterior part of the piston, bucket, or plunger,
or with the packing thereof, by means of one or more comparatively fine holes This
oil reservoir contains, by preference, some sponge or other porous material In, the
interior of the piston rod may be fitted a small plunger or piston, the end of same
or its rod passing out at the top or knob part of the large piston or plunger rod,
and we there form it with screw threads and knob or handle, the said screw, threads
fitting in or on corresponding screw threads in or on the end of the large piston rod
of the enema, or the top or knob part of the large piston may have the small
inner piston fixed thereto, and be screwed on to the large piston 1od, on which
it can thus be raised or lowered there by raising on lowering the small internal
piston rod
A small space is left between the bottom of the hollow in the largo, piston rod
and the end of the internal or small piston rod This space is filled with oil or
other lubricant, and contains also, by preference, some poious material, as aforesaid
When the internal piston 1od is forced down into this space the lubricant is forced
out through the aforesaid small hole or holes communicating with the exterior or
packing of the enema piston, thus lubricating the same, an occasional small part of
a turn suffices for the efficient and economical lubrication of the piston
Figure 1 of the accompanying Drawings is a longitudinal section to an enlarged
scale of "hypodermic" syringe constructed according to this Invention A is the
outer glass cylinder o bariel, to which aio cemented the front cover B with its
nozzle piece
Cand the back cover D The piston rod E is made hollow, forming in
the intenor an oil reservoir, which, by one oi moio holes e, communicates with the
exterior of the piston F, which, in this case, is shown as it were double G is a
smaller inner piston rod passing out through the screwed cential part of the knob I
of the piston rod E, and fitted with a piston g made to fit and work in the piston
rod E The small piston rod G has a knob, by turning this knob one way or the
other the small piston g is brought further down into the outer hollow piston oi oil
reservoir E, thereby forcing some oil out into the exterior or packing of the
piston F, and lubricating it thereby, by turning the knob, the other way it is
withdrawn, and when the knob I is unscrewed and wholly taken off, the oil reservoir
may be cleaned out and refilled, as required
Figure 2 is a longitudinal section of the modified arrangement above referred to.
The inner piston rod G is in this fixed in the knob I of the outer piston 10d E, and
the knob I is screwed on to the litter. By pulling the piston rod E out a little
further than hero shown, and taking hold of it with one hand, the knob I may be

page_text: When
screwed down or up, as required, in the former case forcing the small piston g further
down into the oil reservoir, and in the latter case withdrawing it therefrom
the knob I is wholly taken off the oil reservoir may be cleaned and refilled
And having thus described and ascertained the nature of this Invention, we
declare that we claim, the construction of a hollow piston or plunger rod, forming
an oil reservoir for lubrication of piston or packing, in combination with an inner
adjustable piston, substantially as set forth
In witness whereof, I, the said James Arnold, for myself and on behalf of tho
said Edward John Guy, have hereunto set my hand and seal, this Thirty-
first day of July, in the year of our Lord One thousand eight hundred and
seventy-seven