Improvements in Safety Suspending Apparatus for Sliding Windows, Shutters, and Doors.
Year: 1899

page_text: Date of Application, 12th Jan., 1899
Complete Specification Left, 21st June, 1899-Accepted, 19th Aug., 1899
PROVISIONAL SPECIFICATION.
Improvements in Safety Suspending Apparatus for Sliding Windows,
Shutters, and Doors.
JOHN THOMPSON, 1, Stepney Causeway, Commercial Road, London, E., Engineer,
do hereby declare the nature of this invention to be as follows:-
A metal box shown in drawing 1 containing a pall or cam 2 riding on a pin 3;
a spring 4 the upper part of which rests behind the pall or cam, the lower being
fixed to the bottom of the box 5. The cord or chain of the sash shutter or door
is fastened to the rod 6 which is connected with the pall or cam by means of
a pin 7. The box as above is fixed in the lower part of the rabbeted portion of
the hanging style; the cord or chain which has at one end the counterbalance
weight is passed through the pulley of the frame in the usual way but instead of
being nailed in the rabbet the cord or chain is attached to the rod 6 which is
connected with the pall or cam. The cord or chain when made fast draws the pall
or cam in flush with the outside edge of style as shown (Fig. 2) allowing the
sash shutter or door to slide up and down freely, but should the cord or chain
break the pall or cam is instantly thrown out by the spring as shown (Fig. 3)
which forms a brake and prevents the sash shutter or door from descending thus
preventing damage to glass or injury to persons below.
Dated this Twelfth day of January 1899.
Improvements in Safety Suspending Apparatus for Sliding Windows,
Shutters, and Doors.
JOHN THOMPSON, 1, Stepney Causeway, Commercial Road, London, E., Engineer,
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 follow-
ing statement:-
-
A metal box shown in drawing (sent in with Provisional Specification 762)
Fig. 1' containing a pall or cam 2 riding on a pin 3 a spring 4 the upper part
of which rests behind the pall or cam, the lower being fixed to the bottom of
box 5. The cord or chain of the sash shutter or door is fastened to the rod 6
which is connected with the pall or cam by means of a pin 7. The box as above
is fixed in the lower part of the rabbeted portion of the hanging styles, the cord
or chain which has at one end the counter-balance weight is passed through the
pulley of the frame in the usual way but instead of being nailed in the rabbet
Price 871

page_text: the cord is attached to the rod 6 which is connected with the pall. The cord or
chain when made fast draws the pall or cam in flush with the outside edge of
style as shown "Fig. 2" allowing the sash shutters or door to slide up and down
freely, but should the cord or chain break, the pall or cam is instantly thrown out
by the spring as shown "Fig. 3" which forms a brake and prevents the sash,
shutter, or door from descending thus preventing damage to glass or injury to
persons below.
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:
The invention of the metal box containing a pall or cam which is thrown out
by a spring if the cord or chain of the hanging sash, shutter, or door, should break.
Dated this 21st day of June 1899.
JOHN THOMPSON.