Improvements in Roller Blind Rack Pulleys.
Year: 1889

page_text: Date of Application, 13th Apr., 1889
Complete Specification Left, 13th Jan., 1890-Accepted, 8th Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Roller Blind Rack Pulleys.
I GEORGE HATTON of 28 Eastbank Street Southport in the County of Lancaster
Window blind Manufacturer, do hereby declare the nature of this invention to be as
follows:
-
The object is to provide for roller blinds a simple and efficient rack pulley securely
held in position when required yet readily adjustable.
Apparatus under my invention consists in the combination of a rack or equivalent
plate a guide bar or bars, a carriage free to travel on the said guide bar or bars and a
pawl or pawls pivotted to the said carriage and free to engage in the teeth or
equivalent devices of the rack plate.
Dated this 19th day of Anril 1880
Per pro J. T. KING,
*J. Johnson,
Agent.
COMPLETE SPECIFICATION.
Improvements in Roller Blind Rack Pulleys.
1 GEORGE HATTON of 28 Eastbank Street Southport in the County of Lancaster,
Window 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 :-
The object is to provide for roller blinds a simple and efficient rack pulley securely
held in position when required yet readily adjustable.
Apparatus under my invention consists in the combination of a rack or equivalent
plate, a guide bar or bars a carriage free to travel on the said guide bar or bars and
a pawl or pawls pivotted to the said carriage and free to engage in the teeth or
equivalent devices of the rack plate.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a transverse section, and fig. 2 an elevation of a roller blind rack pulley
under my invention, a is the rack plate, 6 is the guide bar secured to the rack plate
by rivetting or in any suitable way, c carriage free to travel on the bar b and held in
position by through pins d, e pawl pivotted to the carriage cat f and free to
engage in the teeth of the rack plate a by the action of gravity, g are projections
on the pawl to enable it to be raised out of contact with the rack teeth, h pulley carried
on a spindle i secured to the carriage c.
Fig. 3 is a transverse section, and fig. 4 an elevation of apparatus under my inven-
tion in which two bars 661 are used and in which the carriage c is held in position by
turned down edges j instead of by through pins d.
It will be obvious that when two bars are used the edges of the carriage might.
fit into grooves in the said bars or the bars may fit into recesses in the carriage.
[ Price 621

page_text: Having 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 :-
First. The combination of rack plates, guide bars pulleys carriages and pawls
substantially in the manner and for the purpose setforth.
Second. Roller blind rack pulley apparatus having a carriage held in position by a
pawl or pawls constructed and actuated substantially as set forth
Dated this 11th day of January 1890.
Per pro J. T. KING,
J. Johnson,
Agent.