Improvements in or connected with Veterinary Instruments for Impregnating Purposes.
Year: 1891

page_text: Date of Application, 28th Mar., 1891-Accepted, 16th May, 1891
COMPLETE SPECIFICATION.
Improvements in or connected with Veterinary Instruments for
Impregnating Purposes.
A communication from abroad by CHARLES C. LYFORD, of 821 3rd Avenue
South, Minneapolis, Hennepin County, Minnesota, United States of America,
Veterinarian.
I WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E. of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool, and 6 Bank Street,
Manchester, both in the County of Lancaster, and 323 High Holborn in the
County of Middlesex, Civil 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 following statement:-
This invention relates to means for use in breeding mares. Heretofore much
trouble has been experienced in getting mares into foal owing to the contraction or
displacement of the female parts so as to close the opening through the cervex thus
preventing the passage of the male semen into the uterus when it comes in contact
with the female ovum which must take place before impregnation can result. It
has been found by experience that less than 50% of the attempts at breeding are
successful, nearly every mare requiring several services. And notwithstanding
repeated services of the stallion, many valuable mares remain barren season after
season, thereby causing the owner much expense, and also great pecuniary loss
cwing to his being deprived of colts which would otherwise be raised. In addition
to the loss occasioned by the inability of the mare to conceive, is the detrimental
sapping of the vitality of the stallion, thus greatly limiting the number of
pregnant mares each season.
The object of this invention is to provide means for ensuring impregnation and
my invention consists generally in the devices hereinafter described and particularly
pointed out in the claims.
This invention will be more readily understood by reference to the accompanying
drawings in which :-
Fig. 1 is a longitudinal section of a device embodying the invention.
Fig. 2 is a similar view of another form of the impregnator.
Figs. 3 and 4 are end views thereof.
Fig. 5 shows novel means for inserting the impregnator properly.
Fig. 6 is a sectional detail thereof.
In the drawings 2 represents the main portion of the device which is in the
form of a tube open at both ends and having at one end the disc 3 with a rounded
or funnel shaped opening in its centre corresponding to the opening through the
tube 2. The outer surface of the tube is contracted at 4 between the disc 3 and
the rounded end 5. The outer edges 6 of the disc are thrown back and being thin
and flexible are adapted to closely engage the surrounding parts when the device
is in use.
The device shown in Fig. 2 differs from that shown in Fig. 1 merely in
the proportions of the tube, the tubular opening 7 through the same being larger
and the rounded end 8 being expanded to a greater size so as to insure its being
held firmly in place.
As above spoken of the entire device is preferably formed of rubber so as to be
flexible and at the same time possess sufficient rigidity to prevent its being
collapsed when in position.
It is obvious than any other material may be used in making the devices though
rubber is preferred for many reasons. The funnel shape of the opening in the
disc end of the device renders the same an assistance when in use in creating a
vacuum in the uterus by the action of the male organ against the disc as a valve,

page_text: After copulation
whereby causing a suction through the tube and into the uterus.
the impregnator should be immediately removed to prevent straining.
The principal advantages of the impregnator are ease of insertion, non-
compressibility; and the advantage set forth in the preceding paragraph.
When the device is used it is carried in through the vagina and the end of the
tube pushed through the cervex or neck of the uterus the same being first
somewhat dilated to make the insertion of the tube easy. After being forced
through the neck of the womb the disc comes in contact with the posterior end of
the os uteri. The tube is firmly held in position by the closing of the neck of the
uterus about the portion 4 of the tube.
In Figs. 5 and 6 a device is shown especially designed for use in connection
with the impregnator. Inasmuch as the end of the impregnator tube is rather
blunt it has been found difficult to force it through the cervex. By use
of the insertion rod 9 a temporary sharp end is formed on the tube 2 so
that being guided by two fingers of the hand the impregnator is easily pushed
into place.
The insertion rod 9 is ordinarily about two feet long and
is provided on its inner end with the pointed bulb or head adapted to fill the
opening in the end of the impregnator and to project slightly beyond the same.
The conical disc 11 is fastened on the rod 9 and is adapted to prevent the rod
from being forced in too far by engaging the disc of the impregnator. All of the
edges of the bulb and disc 11 are rounded so as not to lacerate the flesh.
The bulb or head 10 is preferably detachable as shown in Fig. 2 so that a bulb
of one size may be substituted for another adapted for use with a larger
impregnator.
After the impregnator has been forced into place the rod with the bulb may be
easily withdrawn by simply holding the tube in place while drawing the bulb out
of the same.
Having now particularly ascertained and described the nature of the said
invention as communicated to me by my foreign correspondent I declare that
what I claim is :-
a
1. The herein described veterinary instrument consisting of a tube 2 having
rounded end and a contracted portion 4 and the disc portion 3 having the curved
or funnel shaped opening communicating with the opening through the tube,
substantially as described.
2. A device of the class described consisting of the tube 2 having the rounded
end 5, the contracted portion 4 and the disc 3 having the curved outer portion 6
and the central curved or funnel shaped opening co-incident with the opening
through the tube 2, substantially as and for the purpose specified.
3. A device of the class described consisting of a rubber tube portion having a
large rounded end 8 and a contracted portion 4 and the rounded disc portion
formed on the outer end of the tube and having the curved or funnel shaped
opening communicating with the opening through the said tube, substantially as
described.
4. The combination in an insertion rod adapted for use with the impregnator
of the rod 9 having a suitable handle with a pointed head or bulb 10 adapted to
project beyond the end of the impregnator tube to form a slender point thereon,
substantially as described.
5. The combination in an insertion rod for use with the within described
impregnator of the rod 9 having a suitable handle with the bulb or head and the
disc 11 adapted to engage the disc of the impregnator, substantially as and for
the purpose specified.
Dated the onl 1
1
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.