Improvements in Pivots for Spring Blind Rollers.
Year: 1893

page_text: Date of Application, 25th Mar., 1893
Complete Specification Left, 12th Dec., 1893-Accepted, 13th Jan., 1894
Improvements in Pivots for Spring Blind Rollers.
I, JAMES ROBERTSHAW, of Churnett Street, Manchester, in the County of
Lancaster, Blind Manufacturer, do hereby declare the nature of this invention to
be as follows:-
It relates to the pivots upon which spring blind rollers turn, and more particularly
to the means for securing the same to the wooden rods around which the spring is
coiled.
Hitherto the pivots have been passed into the end of the wooden rod through a
brass cap, and secured by a pin driven through the cap, rod, and pivot.
This pin cannot be made very thick and is always liable to break or bend under
the great pressure exerted by the spring.
I therefore propose to supplement the pin by forming the end of the pivot,
which enters the wooden rod, of a square or other suitable shape to prevent it from
turning in the rod, and forming the orifice in the brass cap of a suitable shape to
match, and further secure the brass cap to the wooden rod by denting or pinning.
I also increase the number of catch slots upon the pivot to four, this enables me
to form the projecting end of the pivot of a square form and insert the roller in the
brackets any side up.
Dated this 22nd day of March 1893.
JOHN HENRY TOPHAM,
46ª, Market Street, Manchester, Agent to Applicant.
COMPLETE SPECIFICATION.
Improvements in Pivots for Spring Blind Rollers.
1, JAMES ROBERTSHAW, of Churnet Street, Manchester, in the County of
Lancaster, Blind 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 :-
It relates to the pivots upon which spring blind rollers turn, and more
particularly to the means for securing the same to the wooden rods around which
the spring is coiled.
Hitherto the pivots have been passed into the end of the wooden rod through
a brass cap, and secured by a pin driven through the cap, rod, and pivot.
This pin cannot be made very thick and is always liable to break or bend under
the great pressure exerted by the spring.
I therefore supplement the pin by forming the end of the pivot which enters the
wooden rod, of a square or other suitable shape to prevent it from turning in the
rod, and forming the orifice in the brass cap of a suitable shape to match, and
further secure the brass cap to the wooden rod by denting or pinning.
Referring to the drawings sent herewith :-
:-
Figs. 1, 2, 3, and 4 are respectively side and end views of the brass cap and pivot
formed with square orifice a and end b; and Figs. 5, 6, 7 and 8 are respectively
side and end views of the same with the orifice c and end d formed in another suitable
manner, viz. with a tapering pin d and two side flanges or lugs e to prevent it from
turning in the wooden rod f.

page_text: I do not confine myself to the shapes shown as it is evident that a number of
shapes equally suitable could be easily designed.
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 :-
In a pivot for a spring blind roller, a pivot formed of a square or other suitable
shape to prevent it turning in the wood, in combination with a suitably perforated
brass cap, substantially as described and shown hereinbefore and in the accom-
panying drawings.
Dated this 11th day of December 1893.
JOHN HENRY TOPHAM,
984, Market Street, Manchester, Agent to Applicant.