Improvements in Ventilators.
Year: 1896

page_text: Date of Application, 26th Oct., 1895
Complete Specification Left, 16th Dec., 1896-Accepted, 23rd Jan., 1897
Improvements in Ventilators.
WILLIAM ECHSTEIN and JOHN ALFRED WILLMORE Engineers both of
187 Union Street Borough London S.E. do hereby declare the nature of this
invention to be as follows:-
Our invention is for the simplification and improvement of ventilators for the
admission of fresh air usually known as Sheringham or inlet ventilators.
We make the body of the ventilator A of the shape shown on drawing, the
valve B is formed with pivots on its ends which drop into recesses C C formed in
the body of the ventilator and in which the valve B is free to swing. The valve
being placed in position the front D is put on & as it projects over the pivots of
the valve this latter cannot get out of position or be removed until the front is
taken off. The valve B opens by its own weight and is closed by means of the
cord passing over the pulley E.
The advantages of this ventilator are that, it is cheaply constructed, that should
the valve break or by any means get displaced it would fall into the body of the
ventilator and prevent any chance of accident as may & does happen with other
ventilators, when full open for admission of air there are no obstructions and
the air is delivered upwards; the area of opening at the top or outlet is nearly
double the area where the air passes the valve and the velocity & consequently
possible draughts are reduced to a minimum-by raising the flap the area of inlet
can be reduced to any desired quantity; the front being moveable is a great
convenience in papered rooms as it can be removed & the paper put right up to
the body of the ventilator aud the front being put on covers the joint.
Dated this Twenty-sixth day of October 1896.
W. ECHSTEIN.
J. A. WILLMORE.
WILLIAM ECHSTEIN and JOHN ALFRED WILLMORE Engineers, both of
187 Union Street Borough London S.E. 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:-
Our invention is for the simplification and improvement of ventilators for the
admission of fresh air, and which are usually known as Sheringham or inlet
ventilators.
Referring to the drawings left with the Provisional Specification we make the
body of the ventilator A of the shape shown, the valve B is formed with pivots on
its ends which drop into recesses C, C, formed in the body of the ventilator and in
ich the alma Bie free to awing.

page_text: Ths valve being placed in position the front D is put on and screwed to the
body of the ventilator by the 2 screws shown in the drawing, and as this front
projects over the pivots of the valve, the latter cannot be removed or get out of
position without the front be taken off.
The valve B opens by its own weight and is closed by means of the cordassing
over pulley E.
The advantages of the ventilator over those of the old form are that it is cheaply
constructed, that should the valve by any chance be broken the pieces fall into the
ventilator and not into the room, when full open for admission of air there is no
obstruction and the air is delivered upwards the area where the air passes the
valve when the latter is full open is only half the area of the opening where the
air leaves the ventilator so that the velocity of discharge is reduced and
the curve of the body is so arranged that the area at the valve is proportional to
the amount it is closed; the moveable frout is a great convenience as in papered
rooms the paper can be carried up to the body of the ventilator and the front when
put on covers the joint.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
The construction of inlet ventilators with the front of the body curved and the
valve formed with pivots on its ends which pivots fit into recesses in the ends of
the body & are prevented from being displaced by the moveable front, substantially
as described and illustrated.
Dated this Fifteenth day of December 1896.
W. ECHSTEIN.
J. A. WILLMORE.