Improvements in such Surgical Instruments and Appliances as are Composed of or in Part Composed of India Rubber.
Year: 1892

page_text: Date of Application, 11th May, 1892
Complete Specification Left, 11th Feb., 1893-Accepted, 1st Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in such Surgical Instruments and Appliances as are
Composed of or in Part Composed of India Rubber.
I EDWIN DODD of No. 2 Gothic Villas West Green Tottenham in the County
of Middlesex, Surgical Instrument and Appliances Manufacturer do hereby
declare the nature of this invention to be as follows:-
All instruments or appliances manufactured of, or in part consisting of india
rubber-by the treatment herein described-all imperfections in the india rubber
are overcome--a new solid surface being given to the india rubber, thus avoiding
all escape of air when inflated or escape of water or other substance when so
filled.
Treatment the manufactured articles are-
(1.) Steeped in kerosene.
(2.) Placed in a warm oven for a quarter of an hour.
(3.) Dipped in a solution of coal tar naptha and and any artists coloring matter-
according to the requirements of the trade-and allowed to stand for-say-twenty
four hours.
(4.) Dipped in a solution of chloride of sulphur and bi-sulphide of carbon.
(5.) Placed in a warm oven for half an hour.
(6.) Dipped in a solution of sulphuric acid and water.
Dated thin lawanth d...
1000
COMPLETE SPECIFICATION.
Improvements in such Surgical Instruments and Appliances as are
Composed of or in Part Composed of India Rubber.
I, EDWIN DODD of No. 2 Gothic Villas, West Green Tottenham in the County
of Middlesex, Surgical Instrument and Appliances Manufacturer 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 :-
All instruments or appliances manufactured of or in part consisting of india
rubber-by the treatment herein described--all imperfections in the india rubber
are overcome a new solid surface being given to the india rubber thus avoiding
all escape of air when inflated or escape of fluid when so filled.
Treatment
(1) The manufactured articles are steeped in benzine for forty seconds.
(2) Placed in a warm oven for fifteen minutes.
(3) Having prepared a solution as follows-and having allowed same to stand
for three days before using-viz.: some finest quality para india rubber dissolved in
benzine about twelve ounces of the former to one gallon of the latter-to which is
added-say-half an ounce of flake white and a small quantity of vermillion-
artists colors to produce a flesh or other tint as may be desired-the articles are
placed in the said preparation for thirty seconds-then in a warm oven for one day-
they are then again placed in the said preparation for thirty seconds and again
placed in a warm oven for one day.
(4) Dipped in a solution of carbon-bisulphide and chloride of sulphur-say-
seven pounds of the former to three ounces of the latter-three times at intervals of
three minutes.
(5) Placed in a warm oven for half an hour-completing the process.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
(1) A solidified surface to the instruments and appliances.
(2) A more cleanly appearance whilst in use.
(3) More durable.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
(1) A solidified surface to the instruments and appliances.
(2) A more cleanly appearance whilst in use.
(3) More durable.
(4) More reliable especially when such instruments or appliances are inflated
with air or are filled with fluid.
וד
1000