Year: 1888

page_text: ADAM CLARKE 5 Dora Road Small Heath Birmingham Engineer's Brassfounder
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, that is to say :-
The object of this Invention is to facilitate the renewing and changing of the
Roller Blind without removing the action or disturbing the drawing up line in its
connection with the Pulley Sheave and is fully described and set forth in the drawings
herewith annexed.
A is a wood or metal roller fitted at each end with a cap shewn in drawings B. C.
The cap B is constructed with a pivot which works in a slot bearing in the
Bracket D. and is kept in position by a moveable lever S. The cap C is con-
structed with an inner socket or bush of such shape as may be convenient for
connecting; and putting the roller into action with pin E which passes through and
is secured to the cord sheave H. The pin or spindle E works in two bearings fitted
into; and supported by Bracket G. The bearing F (on the projecting pin side of
the Cord Sheave H) is removeable being a slide of metal or other material. On
the other side of the Cord Sheave H is fixed a Ratchet Wheel I with paul N, the
outside of such Ratchet Wheel being round projecting in such a manner as to
take its bearing in the Bracket or Bush K. forms the friction wheel of the action
-leather or other material is fixed in brush K and also on the edge of the friction
block L coming in contact with the friction wheel.
Bush K is provided with a screwed cap P into which is screwed a set pin M
the purpose of which is the application of pressure to the friction block L, such
pressure being regulated according to the weight or size of the Blind by the
screw M.
Pin E passing through the cord sheave H, & entering into a circular hole in the
friction Ratchet Wheel I forms the pivot upon which the connected roller, and
the cord sheave revolve. This arrangement allowes the Blind to be drawn up by
the cord U independently of the friction necessary to sustain the Blind.

page_text: The arrangement of the Socket C, and pin E allows the roller A with or
without the Blind attached to be removed without disturbing or disarranging the
Brackets cord or cord sheave H, and facilitates the removing and replacing of the
Blind.
I wish it to be understood that I do not confine myself to the precise shape form
or configuration of the various parts of the action, but may find it necessary to vary
them for the convenience of manufacture.
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
1st. The principle of the detachment or removal of the Blind Roller from the body
of the action without interfering with or disturbing the position of the cord sheave
or pulling up line, whether obtained in the herein particularly specified manner or by
any other mechanical arrangement.
2nd. The application of a Ratchet friction wheel actuated upon by a set pin the
purpose of which is for sustaining the weight of various sizes of blinds, the said
Ratchet friction wheel being the bush or bearing of the revolving spindle or pivot
by means of which the roller revolves and the Blind is drawn up independently of
the friction arrangement.
3rd. The sliding plate F in its combination and conjunction with its spindlė E and
the cap C.