Casements or ventilators.
Year: 1888

page_text: Casements or ventilators.
We, CHARLES PATULLO KINNELL 65° Southwark Street, S.E. in the County of
Surrey, Engineer and, GEORGE ROTHNIE, 17, Ashmount Road, N. in the County of
Middlesex, Engineer, do hereby declare the nature of this invention and in what
imanner the same is to be performed, to be particularly described and ascertained in
and by the following statement:—
-
f
Our invention relates to improvements in apparatus for balancing and facilitating
the opening of hinged sashes, Casements &c. especially those used in ventilating Plant
houses, Factories and similar structures. In ventilating such buildings the sashes or
Casements intended to be opened are usually mounted on hinges, and attached to a
shaft or rod underneath by means of what is known as "Elbow Levers." This shaft
being mounted on suitable bearings is turned upon its axis & so opens or shuts the
sashes simultaneously as may be desired: Where a heavy sash or a number of these
are employed it is found necessary to use a powerful lever or other mechanical
power, in order to turn the shaft and counterbalance the weight of sashes.
In some cases counterbalancing weights attached to levers on main rod have been
employed to balance the sashes, and so facilitate their opening..
Our invention applies to the employment of Volute or Helical springs for that
purpose and applies to all cases where a rotary rod or shaft is employed or applied
for opening Sashes, Casements, or other ventilators. By preference we employ a
"helical" spring made and fitted in the following manner.
The Spring. This is made of steel or other hard metal, a rod or wire of suitable
length having a loop or eye formed on each end, is carefully coiled on a mandril,
somewhat larger than the shaft or rod it is intended to be mounted upon.
The number of such Coils, necessary, are determined by the number and weight of
Sashes employed.
Fitting In order to fit or attach these springs for action we first insert or fit a
pin into the side of the carriage or bearing, supporting the shaft, while a similar pin
is fitted in a moveable collar, we place on the Shaft.

page_text: This collar is provided with a set screw, and also a number of holes in its circum-
ference: the Spring is mounted on the shaft, between the said collar, on the one hand,
and the carriage or bearing on the other: the loop on one end of the spring is drawn
over the pin on the carriage, while the other is put over the pin on the collar-by
inserting a piece of iron or "Tommy" into the holes in collar it can be turned round
and so bring the spring into tension. The set screw can then be tightened up to the
shaft and so fix the collar; leaving the whole thus ready to balance or overcome the
weight of sashes and thus facilitate their opening.
Another form or method consists in the employment of a "Volute" spring for a
similar purpose. This spring can be fitted into a box or case, one end of the spring
being attached to the rod or shaft, while the other is attached to the lid of the box;
this arrangement being similar to that used in Clocks & Watches: the other half of
the box is by preference fixed to the ratter and also forms a bearing or carriage for
shaft: on this portion is a flange or set of lugs, while on the other half or lid are
similar projections.
The spring is brought into tension by turning the Lid while the other half remains
fixed, and is left in action by inserting bolts or pins through the lugs or flanges.
In order that the said, invention may be 'fully understood, we shall proceed more
particularly to describe the same, and for that purpose shall refer to the several figures
on the annexed sheet of drawings.
Same letters indicate corresponding parts in all figures.
Fig. 1. of the accompanying drawing
to, and as mounted on the shaft or rod.
(sheet 1.) shows the various parts referred
A. is a helical spring as proposed, while B
is the shaft. C. the carriage or bearing. D. the collar. G. the elbow lever.
Fig. 2 is an end section, showing the carriage with spring attached by means of s
the eye and pin I.
Fig. 3-shows the collar having the other end of spring attached to the pin I.
E set screws and FF holes for adjusting the collar and spring.
Fig. 4 shows spring in position.
Fig. 5. shows the elbow lever as attached to rod and sash H.
Fig. 6 (Sheet 2) shows an end section of volute spring and box.
Fig. 7-shows a front view of, the same. J. box with spring. K bolts or pins for
joining box to carriage and adjustment.
Having now particularly described and ascertained the nature of our said inven-
tion and in the manner the same is to be performed, we declare that what we
claim is as follows,-
1st. The application of springs for the purpose herebefore described.
2nd. The manner of mounting fitting and applying the same.
3rd. The method of regulating or winding up the said springs.
Dated this 3rd day of August 1888.
:
CHARLES, PATULLO KINNELL
GEORGE ROTHNIE.