Invention relating to the Manufacture of Midwifery Forceps of the class known as Axis Traction
Year: 1897

page_text: Date of | Application, 12th Nov., 1897
Complete Specification Left, 13th July, 1898--Accepted, 29th Oct., 1898
Date of Application, 12th NOV., 1897
Complete Specification Left, 13th July, 1898--Accepted, 29th Oct., 1898
PROVIDIONAL DIUITIUATION
An Invention relating to the Manufacture of Midwifery Forceps
of the class known as Axis Traction,
ERNEST ELIAS TIDBOALD BADCOCK GREVILLE, 12, Teviot Place, Edinburgh,
Surgical Instrument Maker I do hereby declare the nature of this invention
to be as follows: —
An invention relating to the manufacture of midwifery forceps of the class
known as axis traction especially to that type of axis traction forceps in which
traction rods can be attached to the forceps after the latter are applied to the
foetus, as in the Neville's type of midwifery forceps. The main object of my
invention is to permit the forceps to swing or flex more freely on the traction rod
in response to Euch movements of the foctus as flexion of the head and the like.
A further improvement is that by arranging that the jointed part of the traction
rod when in line of traction runs paralled with the handles of the forceps as in
the Milne Murray's type of forceps, the operator can more easily perceive and
correct any deviation from the axis of traction than in other forceps of the.
Neville's type.
To obtain these improvements in practice I make the forceps flex on the traction
rod by a hinge joint, pivot or axis placed at that end of the traction rod which
is attached to or near to the handle of the forceps, instead of making such hinge
near the cross bar or handle of traction rod such as has hitherto been the custom.
I further shape the traction rod so that part of it lies parallel to the handles of
the forceps as already stated.
A further improvement consists in the combination in midwifery forceps of the
traction rod already described with blade of midwifery forceps of which the
inside surface or part which grips the foetus is left relatively rough and unpolished
so as to minimise the risk of slipping when in use.
Dated this 11th day of November 1897.
An Invention relating to the Manufacture of Midwifery Forceps
of the class known as Axis Traction.
I, ERNEST ELIAS TIDBOALD BADCOCK GREVILLE, of 12, Teviot Place, Edinburgh,
Surgical Instrument Maker, 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:-
My invention relates to the manufacture of midwifery forceps of the class known
as axis-traction especially to that type in which the traction rods can be attached

page_text: to the forceps after the latter are applied to the foetus as in the Neville's type
of midwifery forceps.
The object of my invention is to permit the forceps to swing or flex more freely
on the traction rod in response to such movements of the foetus as flexion of the
head and the like than can be permitted by forceps in which the joint is made
in the way and situation hitherto adopted.
A further improvement is that by arranging that the jointed part of the traction
rod when in line of traction runs parallel with the handles of the forceps as in
the Milne Murray's type of forceps I dispense with a special indicator as the
operator can by observing, the movements of the handles of the forceps more
easily perceive and correct any deviation from the axis of traction than in other
forceps of the Neville's type in which a special indicator is necessary to show
errors in traction.
To obtain these improvements in practice I make the forceps A B C, Figure 1
flex on the traction rod P N by a hinge joint pivot or axis placed at that end N
of the rod P N where the rod P N is attached to the handle A B of the forceps
near the shanks D E or to the shanks D E of the forceps themselves, instead of
making such hinge at K near the cross bar or handle F G of the traction rod
such as has hitherto been the custom.
The joint can be either a simple hinge formed by a pin held in a hole, groove
slot or other suitable place of support in which it can turn, or by a clamping
screw, screw pin, ball and socket or other device for forming a hinge or movable
joint at the end N of the single traction rod P N. where it joins the rest of the
instrument or what amounts to the same thing that the rod PN should so fasten
to the forceps handles A B or shanks 1) E as to work as a hinge where it is so
attached, and should thus safely permit the operator to pull in the correct line
of traction.
I further shape the traction rod P N that part of it L N lies parallel to the
handles A B of the forceps A B C as already described.
A further improvement is that by arranging that the jointed part I Figure 2
of the traction rod P N which carries the cross bar or traction handle F G can
flex or hinge laterally to a right angle with the main part of the traction rod so
that the cross bar F G can thus be turned parallel with P K of the traction
rod PKN and can thus be more conveniently packed and carried than traction
rods made as formerly.
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:
Firstly. In midwifery forceps with single traction rods an alteration in the
shaping of the rod and the placing of the joint substantially as described, securing
greater mechanical advantages than possible in such forceps made on the oid plan.
Secondly. That by making part of the rod parallel to the handles of the
forceps these handles themselves serve as an indicator. Thus I simplify the
forceps by doing away with a special indicator yet I give one that more easily
shows error.
Thirdly. By filing the joint at which the cross bar flexes laterally on the traction
rod so that the two parts hinge at right angles to one another I arrange that the
cross bar lies parallel to the traction rod and thus make the instrument more
convenient for packing and carrying.
Dated this 12th dox of Tuly 1898
ERNEST ELIAS TIDBOALD BADCOCK GREVILLE.