Improvements in Mechanism for Raising, Lowering, and Retaining Sashes, and other like objects.
Year: 1895

page_text: Date of Application, 18th Dec., 1895
Complete Specification Left, 18th Sept., 1896-Accepted, 24th Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Mechanism for Raising, Lowering, and Retaining
Sashes, and other like objects.
We, JOHN MERRILL, of 26 Mowbray Street in the City of Sheffield, Engineer,
aud ISAAC LEVERSIDGE, of 15 Buckingham Terrace, Dronfield, in the County
of Derby, Fitter do hereby declare the nature of our invention to be as
follows:-
:-
Our invention relates to mechanism for raising and lowering window sashes,:
shutters and the like, the object being to accomplish this with great facility,
and it refers particularly to the sashes of railway carriage doors. which by
means of our improved mechanism can be raised or lowered and be suspended in
any desired position without the necessity of the person rising from the carriage
seat.
In carrying out our invention in its application to a carriage door for example,
for the purpose of raising and lowering the sash, as above mentioned, we place
inside the hollow framework of the doorcase into which the sash or glass frame
descends, an arrangement of pivotted bars constructed on the well known principle
of the lazy tongs, having a vertical expanding and contracting action.
The two bottom bars are pinjointed to a bracket fixed to the lower part of
the door frame and the two top bars are similarly secured to the underside of
the sash.
A suitable handle or lever is fixed upon the inside panel of the door or preferably
upon the garniture rail, in a convenient position for use, and its spindle passes
through into the inside and carries a short lever the outer end of which is pin-
jointed to a descending arm having its lower end connected preferably to one of
the central joints of the lazytong frame, all the several parts being of such
proportions and so arranged that when the said handle is turned a quarter of a
circle or thereabouts, the sash will be raised to its full height.
i
Any suitable retaining or supporting mechanism may be used in combination
with the above, such as a ball catch engaging with corresponding recesses in
any of the moving parts of the mechanism, or of the sash, sufficiently strong to
retain the raised sash, but yielding to a slight application of force in either
O direction.
lustead of the partly revolving handle before described, we may substitute a
direct vertically moving handle or knob upon the door, moving in a slot and
connected with a vertical arm attached to the lazytong frame before described.
Any form of dust and draught excluding joint may be used in combination with
5 the lifting appliance.
1

page_text: Improvements in Mechanism for Raising, Lowering, and Retaining
Sashes, and other like objects.
We JOHN MERRILL of 26 Mowbray Street in the City of Sheffield, Engineer
and ISAAC LEVERSIDGE of 15 Buckingham Terrace, Dronfield in the County
of Derby, Fitter, do hereby declare the nature of this invention and in what
manner the same has to be performed, to be particularly described and ascertained
in and by the following statement :-
"Our invention relates to improvements in mechanism for raising, lowering and
sustaining window sashes, shutters and the like, the object being to accomplish this
operation with ease and facility, and it refers more particularly to the sashes of
railway carriage doors which by means of this improved mechanism can be raised
with a very slight exertion of power and will remain suspended in any desired
position.
i
The annexed drawings will illustrate our invention as applied to a railway
carriage door for example.
Fig. 1. Elevation of a carriage door with the inside facing boards removed to.
show the mechanism.
•
Fig. 2. Elevation showing mechanism with direct lift connected with lazytongs
and projecting through slot in door.
Fig. 3. Section of door facing showing slot and lifter..
In carrying out our invention as applied to a railway carriage door for example,
we place within the interior of the hollow framework of the doorcase A, into
which the sash or glass frame B, descends, an arrangement of bars pivotted
together and forming a "lazytongs" appliance C, and having a vertical expanding
and contracting action.
The lower part of this appliance is pinjointed to a fixture D, secured to the
bottom of the doorcase, and the upper part is similarly secured to the underside of
the sash or glass frame B.
A suitable handle E, or lever is fixed upon the inside panel of the door or
-preferably upon the garniture rail F, in a convenient position for use, and its
spindle passes through into the inside and carries a short lever G, the outer end of
which is pinjointed to a descending arm H, having its lower end connected
preferably to one of the central joints of the lazytong frame C, all the several
parts being of such. proportions and so arranged that when the said handle E,
18. turned the half of a circle or thereabouts, the sash will be raised to its full
height.
Any suitable retaining or supporting mechanism may be used in combination
with the above, such as a ball catch engaging with corresponding recesses in
any of the moving parts of the mechanisin, or of the sash, sufficiently strong to
retain the raised sash, but yielding to a slight application of force in either
direction.
.
We prefer however to use a counterweight W, arranged to slide vertically upon
two bars or rods J, fixed to the door frame; the weight is attached to the lazy-
tongs C, by means of two chains or cords L, which pass over pulleys K, and
balance the window so that it may he raised with the least exertion of power, and
sustained at any desired point.
Instead of the partly revolving handle E, before described, we may substitute
a direct vertically moving handle or knob M, see Fig. 2, moving in a slot S, in the
doorcase N, and connected directly with the vertical arm H, attached to the
lazy tong frame C, before described.
As a simple form of mechanism, we may dispense with the handle E, or the

page_text: direct acting lifter M, with the arms G and H-using the lazytong appliance C,
the counterweight W, and a simple lifter P, attached to the top of the sash
frame.
Any form of dust and draught excluding joint may be used in combination with
the lifting appliance.
Having now particularly described and ascertained the nature of our inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. In mechanism for raising and lowering sashes and the like, the combination
with a "lazytongs" appliance C, of a compound lever G, an operating handle E,
and any means for supporting the sash when raised, as hereinbefore described and
shown.
2. In mechanism for raising and lowering sashes and the like, the combination
with a $6
lazytongs" appliance C, of a compound lever G, a handle E, and a
counterweight W, arranged and operating as herein before described and shown.
3. In mechanism for raising and lowering sashes and the like, the combination
with a "lazytongs" appliance having a direct acting lifter connected therewith,
and a counterweight, arranged as hereinbefore described.
"
4. In mechanism for raising and lowering sashes and the like, the combination
of a "lazytongs appliance, with a counterweight for balancing the sash, and
means for operating connected with the sash itself or its equivalent as hereinbefore
described.
5. The combinations of mechanism for raising and lowering window sashes and
the like, as herein before described and set forth.
Dated the 17th day of September 1896.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.