Year: 1898

page_text: I, ALFRED INGRAM, of 11, Ashbourne Grove, East Dulwich, in the County of
Surrey, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates more especially to fastenings for the doors of cold stores,
but it is also applicable to fastenings for other doors or the like, where it is
required to force the door or the like when closed, tightly and firmly into its
frame.
It is well known that the doors of cold stores and the like require to be closed
as airtight as possible, in order to prevent the escape of cold air from the rooms,
and the entrance of warm air into them. For this purpose india-rubber or other
elastic packing is usually placed between the door and the stops in the frame
against which it shuts, and the door is forced firmly against this packing by
means of levers, wedges, screws, and other devices forming fastenings which
have not heretofore given very satisfactory results. The object of my present
invention is to provide a powerful and simple fastening that shall be free from
the defects of those heretofore in use.
For this purpose I employ mechanism of the following character:-
I mount, either directly upon the door or on a plate secured thereto, a bolt
adapted to slide longitudinally in suitable guides. When this bolt is moved
outwards its outer end, which has a notch formed in it, extends beyond the edge
of the door and overlaps the door frame. A screw-bolt is passed through the
door frame at a point in line with the notch in the end of the sliding bolt, and
the screwed end of this screw-bolt projects through the said notch in the sliding
bolt when the latter is thrown out. A suitable wing-nut is adapted to screw on
to the outer end of the aforesaid screw bolt, and to bear when screwed up,
against the notched end of the sliding bolt.
It will now be understood that when it is desired to close and fasten the door
the sliding bolt is drawn back so that its outer end will clear the wing-nut and
screw-bolt. The door is then shut and the sliding bolt thrown outwards until
the notch in its end passes over the screw-bolt and between the nut and the door
frame. The wing-nut is then screwed up on the screw-bolt and until it bears
against the face of the sliding bolt and exerts a powerful effect upon the door,
forcing the latter firmly against its stops or against the elastic packing. When
it is desired to open the door it is only necessary to slacken the wing-nut and
draw back the sliding bolt until its end is clear of the wing-nut, and the door
can then be opened.
Suitable stops may be provided on the sliding bolt to limit its movement in
either direction, and it may be provided with a suitable handle wherewith to
it

page_text: Instead of a wing-nut on the screw-bolt end, a nut of any other kind may be
employed.
A. INGRAM,
Per W. H. Beck,
115, Cannon Street, London, E.C.,
Agent.
New or improved Door Fastening.
I, ALFRED INGRAM, of 11, Ashbourne Grove, East Dulwich, in the County of
Surrey, 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 following statement:-
This invention relates more especially to fastenings for the doors of cold stores,
but it is also applicable to fastenings for other doors or the like, where it is
required to force the door or the like when closed, tightly and firmly into its
frame.
It is well known that the doors of cold stores and the like require to be closed
as airtight as possible, in order to prevent the escape of cold air from the rooms,
and the entrance of warm air into them. For this purpose india-rubber or other
elastic packing is usually placed between the door and the stops in the frame
against which it shuts, and the door is forced firmly against this packing by
means of levers, wedges, screws, and other devices forming fastenings which
have not heretofore given very satisfactory results. The object of my present
invention is to provide a powerful and simple fastening that shall be free from
the defects of those heretofore in use.
And in order that my invention may be fully understood I will now proceed
to describe the same with the aid of the accompanying sheet of drawings, in
which Figure is an elevation of my fastening device as applied to a door
opening outwards, Figure 2 a sectional plan taken on the line 1-2 of Figure 1,
and Figure 3 a similar sectional plan of the same device as applied to a door
opening inwards.
I mount, either directly upon the door A, see Figures 1 and 2 of the drawings
or preferably, on a plate B secured thereto, a bolt C adapted to slide longitu-
dinally in suitable guides D. When this bolt is moved outwards its outer end,
which has a notch E formed in it, extends beyond the edge of the door A and
overlaps the door frame F. A screw bolt G is passed through the dor frame F
at a point in line with the notch E in the end of the sliding bolt C and the
screwed end of this screw-bolt projects through the said notch in the sliding
bolt when the latter is thrown out. A suitable wing-nut H is adapted to screw
on to the outer end of the aforesaid screw bolt G, and to bear when screwed up,
against the notched end of the sliding bolt C.
It will now be understood that when it is desired to close and fasten the door
the sliding bolt C is drawn back into the position shown in dotted lines in
Figure 1 so that its outer end will clear the wing-nut H and screw-bolt G. The
door is then shut and the sliding bolt thrown outwards until the notch in its end
passes over the screw-bolt and between the nut and the door frame as shown
by full lines in Figure 1. The wing-nut H is then screwed up on the end of
the screw-bolt G until it bears against the face of the sliding bolt and exerts a
powerful effect upon the door forcing the latter firmly against its stops or

page_text: against the elastic packing. When it is desired to open the door it is only
necessary to slacken the wing-nut and draw back the sliding bolt until its end
is clear of the wing-nut, and the door can then be opened.
A suitable stop such as I Figures 1 and 2 for example may be provided to
limit the movement of the sliding bolt in either direction, and the bolt may be
provided with a suitable handle J wherewith to move it.
Instead of a wing-nut on the screw-bolt end a nut of any other kind may
be employed.
In the modification shown in Figure 3, where the door opens inwards, the
sliding bolt is constructed and arranged exactly in the same way as in Figures 1
and 2, similar letters of reference relating to like parts in all the figures of the
drawings, but the screw bolt G and nut H are constructed somewhat differently.
In this case as the door A is required to be drawn outwards instead of being
pushed inwards as in the case of Figures 1 and 2 the nut H is provided with a
collar or shoulder H¹ and the notched end of the sliding bolt C is adapted to
take over the body of the nut in front of the collar or shoulder H. The bolt
G is also provided with a collar G¹ which takes a bearing against the door
frame F, the bolt being secured in place by a nut G2 or otherwise.
It will now be understood that when the door is closed and is to be fastened
the sliding bolt C is thrown outwards so that the notch in its end takes over
the nut H in front of the collar H', as shown in Figure 3, and the said nut is
then unscrewed so as to cause the collar H' to press against the back of the
bolt and thereby force the door outwards firmly against its stops, or against
the elastic packing. When the door is to be opened the nut H is screwed
inwards relieving the pressure of the collar H' against the bolt C and the latter
can then be drawn back clear of the nut H and of the door frame F, and the
door can then be opened.
It is obvious that if preferred the sliding bolt may be placed on the door
frame, and the screw-bolt and nut on the door; but in that case the arrange-
ments shown in Figures 1 and 2 will be applicable to a door opening inwards,
and the arrangements shown in Figure 3 to a door opening outwards. That is
to say, the part A in the figures must in that case be regarded as the door-frame,
and the part F as the door.
Having now particularly described and ascertained the nature of the said in-
vention, and in what manner the same is to be performed, I declare that what
I claim is;-
-
First. A door fastening which consists of a sliding bolt secured to the door
and having a notch in its outer end, a screw-bolt secured to the door-frame
and a nut on the said screw bolt combined, arranged and operating substantially
as described with reference to the drawings.
Second. The door fastening forming the subject matter of the first claiming
clause hereof when the sliding bolt is placed on the door frame and the screw-
bolt and nut on the door, substantially as described.
Third. Door fastenings constructed," arranged and operating substantially as
described.