Improvements in Hinges for Shutters and the like.
Year: 1886

page_text: Improvements in Hinges for Shutters and the like.
I, HERBERT JOHN ALLISON, of 52 Chancery Lane, London, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention, which
has been communicated to me from abroad by Benjamin Cornell Anderson, of the
City and State of New York, United States of America, Merchant, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
The improved hinge is intended more especially for window-shutters, and will
be described as so applied. It holds the shutters in the open position. It engages
automatically, and is arranged to be braced and sustained efficiently against the
great force liable to be impressed on it in severe gales.
The two principal parts of the hinge may be of any ordinary construction. The
invention requires only a peculiarly formed dog, and a pivot for connecting it so
that it may rise and sink to be engaged and disengaged. Its form guards against
its sinking or rising beyond the required limits.
The accompanying drawings form a part of this specification and represent what
is considered the best means of carrying out the invention.
Figure 1 is a plan view of the hinge. The adjacent portion of the building is
shown in section.
Fig. 2 is an elevation of the hinge as seen from the left in Fig. 1.
Fig. 3 is a front view corresponding to Fig. 2.
Figs. 4 and 5 show a modification.
Fig. 4 is a plan view and
Fig. 5 is a front elevation.
:
Similar letters of reference indicate corresponding parts in all the figures where
they occur.
A is a portion of the building, B a plate fastened thereon, B¹ an arm extending
out therefrom and B² a pintal mounted in B¹. To the shutter C is fixed a stout
angular iron D having an arm D¹ carrying a socket D2 which engages on the
pintal B. So far as yet described, the hinge is an ordinary and long-approved
construction with the parts so arranged that when the shutter is open the
arms B¹, D¹, shall lie in or near the same plane extending outward from a
building.
M is a peculiarly formed dog of steel or other suitable material, made by drop
forging or otherwise in the form represented. Certain portions will be designated,
when necessary, by additional marks, as M1, M2, etc. It is connected to the arm B¹

page_text: by a stout pivot P, and is formed and bent as shown. The outer end having an
arm M¹ describes an arc of which the pintal B2 is the centre and the lower side of
which is beveled, as shown, and provided with a notch m, adapted to strongly
engage with and hold the part D' when the shutter is fully open. The body M
of the dog lies close alongside of the parts B¹, D³, and when any force, as a strong
wind, tends to shut the shutter, the dog M is braced and supported against the
hinge, as will be obvious. Its corner M³, striking the plate B, supports the dog
against sinking too low, and the corner Ms striking the same plate at a higher
point guards it against being thrown up too high by any force, as by a sudden
impulse in throwing the shutter violently open. The bevel on the underside of M¹
adapts it to engage automatically when the shutter is thrown open.
To unlock and allow the shutter to be closed, it is necessary simply to apply the
finger to the arm M³ and lift the dog.
One important advantage of the invention is the security it gives against the
shutter being lifted. When the dog M is engaged, it not only holds it reliably
open but also guards against its being lifted by wind or other force. So long as the
shutter is down in its place, a finger applied to the dog M will lift it enough to
allow the shutter to be closed. Whenever it is required to un-hang the shutter
for repairing or other purpose, the shutter may be lifted out of engagement with
the hinge by simply lifting the dog and partially closing the shutter. But so long
as the dog is engaged, the shutter cannot be lifted off.
Any lifting force applied to the shutter will raise it a little way carrying the
dog with it. But so soon as the corner M³ strikes the plate B, the dog cannot lift
higher, and the shutter cannot raise higher. It is effectually guarded against being
un-hung while the dog is engaged.
Modifications may be made in the forms and proportions without departing from
the principle or sacrificing the advantages of the invention.
Figs. 4 and 5, show a form adapted to serve on frame buildings where the arm B¹
is short, and the pintal B² consequently near the plate B. In this construction,
the part corresponding to the dog M is pivoted to a point on the plate B, and the
curved arm corresponding to M' extends in the general direction to and from the
building instead of, as in the other form, in a general direction parallel to the face
of the building. This form of the device works the same except that the stops for
restraining the motion are different. The arm B¹ serves as the stop to prevent the
dog from sinking too low, and the same part serves, being struck by another
portion of the dog, as a check to prevent the dog being thrown up too high. This
form of the device automatically engages, and is disengaged by the same action as
the other.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. The combination with the lock hinge B¹.B2 D¹, of the dog M. pivoted to the
part B¹ and having an arm M¹ formed in an arc having the pintal B² for a center,
and provided with an engaging notch m, and means for holding said dog against
an upward movement sufficient to disengage the two parts of the hinge when the
dog is in operation, as set forth.
.
100
1000