Improvements in Roller Blinds.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Roller Blinds.
I, JOHN MCCAMMON, of 14, Glandore Street, Belfast, Ireland, Engineer, do here-
by declare the nature of this invention to be as follows:-
My invention has for its object the provision of improved means for suspending
1oller blinds, whereby the said blinds may be retained in any required position
by virtue of the friction existing between journals mounted on the ends of the
1olleis thereof and the bearing surfaces in which the said journals revolve
According to my invention I mount at one or both of the ends of the blind roller
a journal of suitable diameter which 18 carried in a bearing attached to the frame
of the window or in any other situation where the blind 18 required, by means of
a plate, bracket, or similar contrivance
The journal may if desired be formed on provided with one or more annular
grooves preferably of V or similar shape and in such case the bearing is furnished
with a flat segmental part and a segmental V or milar shaped piece, the flat
segmental part receiving the journal and the segmental V or similar shaped piece
taking into the said V or similar shaped groove on the journal
The bearing is preferably so arranged, that when the blind is being drawn up
by pulling on a cold or otherwise the blind 1oller is caused to shift slightly in
such a manner as to cause the weight of the blind and its roller to be practically
taken off the V or similar shaped piece of the bearing and supported mainly or
entuely by the flat segmental portion thereof, whereby the amount of function
between the blind roller and its bearing is lessened with the result that the blind
rises easily When however, the blind is at rest or being diawn down, the
weight is supported entirely or mainly by the V or similar shaped portions of
the bearing and the amount of the resulting friction is thus increased and is
sufficient to retain the blind in any required position
If preferred I may in some cases so arrange the bearings that the blind rolle
does not shift when the blind is raised, and I may form the journal of a cylin-
drical part only or of a V or similar shaped part only, the bearings being made
to correspond with the journals
In order to increase or decrease the amount of fiction as required, to suit
blinds of different weights, I either increase or decrease, as the case may be, the
diameter of the journals and their bearings, or vary the angle of the. V or similar
shaped grooves.
Dated this 9th day of June 1808
HASELTINE, LAKE & Co,
45, Southampton Buildings, London, WC,
Agents for the Applicant.

page_text: I, JOHN MCCAнMON, of 14, Glandore Street, Belfast, Leland, Engineer, do here-
by declare the nature of this invention and in what manner the same 18 to be
performed, to be particularly described and ascertained in and by the following
statement.—
This invention relates to improvements in roller blinds and has for its object
means whereby the said binds may be retained in any required position by the
fiction between Journals mounted on the ends of the rollers thereof and the
bearings of such journals. The rollers moreover being so arranged that the act of
drawing up the bind, shifts the said journals in their bearings so as to reduce fic-
tion and permit them to tuin freely so that the blind may be easily raised
In order that my invention may be clearly understood and readily carried into
effect I will now proceed to describe the same more fully with refcience to the
accompanying drawings in which.-
Figure 1 is a side elevation showing one end of a blind 1oller fitted with my
invention.
Figure 2 18 a view of the journal bearing at right angles to Figure 1
Figure 3 18 an end view of the opposite end of the blind roller shown in Figure 1,
showing the position of the blind and the cord for raising it.
Figures 4 and 5 ate simular views to Figures 1 and 2 respectively, showing a
modification of my invention.
Referring to Figures 1 to 3, A is the blind roller and a is the blind B 18 the
Journal fixed in any convenient manner to the end of the roller A and consisting
of a V shaped or other suitable groove b, and a smooth cylindrical part b₁ con-
centric with but preferably of lesser diameter than the part b
fixed to the window frame, and cany.ng the journal bearing which consists of a
C is a bracket
V shaped or other suitably shaped segment and a plain segmental piece c
segments and are not concentric with one another but are struck from the
These
centies d and d¹ respectively, and the cucles of which they form parts are of the
same diameters as the parts 6 and 6 of the journal, 1espectively. The segments c
and cale 80 alanged that the weight of the roller and blind tends to make the
part of the journal 1oll onto or engage with the segment c of the bearing.
E (Figure 3) is the cord for 1aising the blind
Referring to Figures 4 and 5, the part 6 of the journal is a V shaped or other
suitable ring or projection and the segment c of the bearing is grooved to receive
this ring the journal and bearing being otherwise the same as in Figures 1 and 2.
When the blind is at rest the part 6 of the journal engages with the segment c
of the bearing and the friction between the two parts is sufficient to retain the
blind in any required position When it is required to raise the blind the cord E
18 pulled in the direction of the arrow (Figure 3), with the result that the journal
and roller are shifted through a distance equal to that between the centres d
and d (Figue 2 or 5), the part 6 of the journal being thereby moved out of engage-
ment with the segment of the bearing, and the smooth oylindrical part 6' of the
jounal caused to engage with the smooth segment c¹ of the bearing The friction
between the roller journal and its bearing is thus diminished and upon con-
tinuing to pull upon the cord E the roller A will revolve with ease and the blind
be thus rolled up Upon the cord E being released the weight of the blind tends
to rotate the roller A in the opposite direction and so cause the part 6 of the journal
to again engage with the segment of the bearing
The parts 6 of the journal and of the bearing also support the roller when the
blind is being pulled down

page_text: Either one or both ends of the roller A may be fitted with these journals and
bearings. When one end only is so fitted the opposite end of the roller 18 pro-
vided with a suitable journal, bearing and cord barrel of any convenient
construction.
When my invention 18 applied to the end of the blind roller to which the cord E
is attached, I preferably arrange the spindle or barrel on which the said cold
winds, inside the journal B.
I have only shown one grooved part, and one correspondingly projecting part in
my journal and bearing, but it is obvious that more than one of such grooved
parts and correspondingly projecting parts may be employed if required either at
one or both ends of the blind roller.
In order to increase or decrease the amount of friction as required to suit blinds
of different weights, I either increase or decrease, as the case may be, the diameter
of the journals and their bearings or vary the angle of the V or similar shaped
groove.
The various parts of the journal and bearing are preferably of metal and may
be formed by stamping casting or any other convenient manner, they may also
be attached to the blind rollei and window fiame by any convenient means
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 18.
-
1 A blind roller having journals of different diameter which are adapted to
be shifted in their bearings as described to bring either the larger on the smalle
into operation for the purpose specified
2 The journal and bearing of a roller blind constructed, airanged, and operating
substantially as described with reference to Figures 1 to 3, or to Figures 3 to 5
of the accompanying drawings for the purpose specified.
Dated this 3th day of March 1899.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, WC,
Agents for the Applicant.
on 1899.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, WC,
Agents for the Applicant.