Improvements in Cement Injectors for Use in Repairing Pneumatic Tires.
Year: 1895

page_text: Date of Application, 22nd Oct, 1895-Accepted, 7th Dec., 1895
COMPLETE SPECIFICATION.
Improvements in Cement Injectors for Use in Repairing Pneumatic
Tires.
I, CHARLES GRAFTON PAGE, of 185 Dearborn Street, Chicago, in the County
of Cook, State of Illinois, United States of America, Solicitor of Patents, do
hereby declare the nature of this invention and in what manner the same 1 to be
performed to be particularly described and ascertained in and by the following
statement:-
The object of my invention 19 to avoid reversing the plunger, and thereby prevent
the fingers of the user from coming in contact with such cement as may be left on the
same, and fun ther, to provide an arrangement whereby the needle can be in position
for use without reversing the plunge. Also, to arrange the parts so that they can
when not in use, be protected from dust.
To the attainment of the foregoing and other useful ends, I provide in connection
with the cement cup having a discharge nozzle, a plunger having a bore in which
the needle is arranged to work, so that when the plunger is to be moved in a
direction to force the cement through the discharge nozzle, the needle can be moved
back and out of the latter.
In the accompanying drawings,-
Figure 1 represents in side clevation a cement injector embodying my invention.
Figure 2 represents the same in cential, longitudinal section.
Figure 3 is a like view showing the cup filled with cement and the plunger in
position to be moved inwardly, the needle being drawn back.
Figure 4 is a central, longitudinal section of the device with the bore through
the plunger, and the needle, both threaded.
The cement cup A is provided with a small tubular discharge nozzle a.
The plunger B works within the cement cup, and preferably the inner wall of the
cup and the perimeter of the plunger, ale correspondingly screw threaded, so that
the plunger can be screwed into and out of the cup.
The plunger is provided with a centrally arranged bore o passage b through
which the needle C is arranged to work Preparatory to inserting the discharge
nozzle into a pneumatic tire, the needle will be in position to form a sharp point for
the nozzle as in Figs. 1, 2 and 4. After the nozzle has been introduced into the
ture, the operator will remove the plunger from the cup, drop a small quantity of
cement into the latter, draw back the needle as in Fig. 3, and introduce the
plunger within the cup so as to cause the cement to be ejected through the
ozzle.
Any suitable stop device can be provided for limiting the extent to which the
eedle can be drawn back. For example, the needle cau be formed with a reduced
ortion c so as to provide it with a shoulder which will abut against a shoulder b¹
t one end of the bore b in the plunger.
As another form of stop, broadly considered, the needle and the bore through
he plunger can be correspondingly threaded, as in Fig. 4, so that the needle can be
crewed back and forth as may be desired.
When not in use, the plunger can be screwed down as in Figs. 1, 2 and 4, and
he needle can be pushed or screwed in so as to terminate short of the end of the
ozzle, thereby avoiding a sharp point at the end of the latter, and permitting
he ride to carry the device in his pocket, if he so desires. Just before use
owever, a slight movement given to the needle will cause its point to project from
Price T

page_text: the discharge nozzle, The plunger is also, desirably provided with an enlarged
head or end which will fit against the receiving end of the cup when the plunger
18 fully pushed or screwed into the same, thereby protecting the plunger froin dust.
It will be seen that in using
The needle can also be provided with a cap or head c²
the device, the operator need only handle the end of the plunger, and also, that
The inner wall of the cup and the
the needle is Lonveniently arranged for service
perimeter of the plunger could be unthreaded, but these parts are preferably
threaded, substantially as shown
Having now particularly described and ascertained the nature of my said inveu-
tion and in what manner it is to be performed, I declare that what I claim is
,
-
1. A cement injection comprising the cement cup provided with a discharge
nozzle, a plunger for ejecting the cement, and a needle for the purpose set forth
airauged to work though an opening in the plunger, substantially as described.
2. A cement injector comprising the cement cap provided with a discharge
nozzle, a plunger for ejecting the cement, a needle for the purpose set forth
airanged to work through the plunger, and means for stopping the needle when
diawn back relatively to the plungei, substantially as described.
3. A cement injector comprising the cement cup having a discharge nozzle,
a plunger for ejecting the cement and a threaded needle arranged to work within a
threaded bore in the plunger, substantially as and for the
purpose set forth.
4. A cement injector comprising the cement cup A having a nozzle a, the
plunge provided with an enlarged end 2, and having a bore fiom end to end, and
the needle aanged to work within such bore of the plunger, substantially as
described
Due 21st day of October 1895.
D YOUNG & Co.,
11 & 12 Southampton Buildings, London, W.C,
Agents for the Applicant