Year: 1888

page_text: I, THOMAS DE GARIS COHU, of Fosso Andry, St. Peter Port, Guernsey, Carpenter
and Builder, do hereby declare the nature of the said 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 to certain improved means to be employed in fastening or
securing in certain desired positions rising and falling window sashes, the same
being specially devised to permit of the top and bottom sashes being fastened
together either in their ordinary closed position or in such positions relatively to
each other as to permit of the ventilation of the room without permitting of the
sashes being opened from the outside and so that ventilation of the room is
provided for while unauthorized access to the room through the window is
prevented.
The Invention is illustrated on the accompanying drawings as applied to window
sashes of the kind hereinbefore referred to, in Fig. 1. which is a front elevation.
Fig. 2. represents a sectional plan view through the line a. b. Fig. 1. Fig. 3. is a plan
view, on an enlarged scale, of the improved means of fastening and Fig. 4. is an end
elevation thereof looking in the direction of the arrow, c.
:
The said improved means comprises a bar, 5, which is slotted as at, 6, or is racked
or otherwise equivalently formed or adapted at any required intervals of distance, and
is made of a length about that of the desired extent of movement of the one sash
relatively to the other while under the control of the fastener. The bar, 5, is applied
to one of the side uprights, 7, of the top sash, 8, or one of such bars may be applied
to each side upright of such sash.
The said improved means also comprises a fastening appliance of the nature herein-
after referred to which is intended to be applied to the top of the meeting rail, 9, of
the bottom sash, 10, opposite the said bar or bars, 5, and to be secured to the said
rail, 9, by screws, 11, or other suitable means. Such fastening appliance consists
essentially of a bolt, 12, adapted to slide freely within a casing, 13, forming part of
or applied to a base plate, 14, and to be propelled (when uncontrolled by the locking
detail hereinafter referred to) into the said slots or notches, 6, or equivalent part of
the said bar, 5, by a helical or other suitable spring, 15, contained within the rear
closed end of the casing, 13, and of a locking detail adapted to co-operate with the
said spring bolt, 12, for the purpose of arresting and permitting of its said action as
and when required.
The bolt, 12, is formed or adapted with a part, 16, which projects therefrom through

page_text: a sloi, 17, made in the side of the casing, 13, and engages with the said locking detail
which consists essentially of a catch-piece, 18, which may be directly connected to a
sliding, pivoted or other convenient form of finger-piece, 19, or may be linked, as
at, 20, or otherwise connected thereto in such a manner as to be capable of being
withdrawn from engagement with the part, 16, of the bolt, 12, so as to permit of the
action of the spring, 15, on the bolt and the consequent engagement thereof with the
said notched bar; 5, and as to be capable of being moved into engagement with
the said part, 16, so as to withhold the bolt in its position of inaction (shown in
dotted lines in Fig. 3.) and prevent the action of the said spring thereon and the
engagement thereof with the bar, 5. In the modification represented on the accom-
panying drawings, the said finger piece, 19, is guided in dovetailed or undercut side
guides, 21, forming part of the base-plate, 14, and is connected to the catch-piece, 18,
centred at, 22, by a link, 20.
Such means may be used apart from any special means of ventilation, which would
then be effected by the exchange of air through the openings between the meeting
rails, 23, 9, of the top and bottom sashes, 8, 10, and between the top rail of the top
sash and the adjacent upper part of the window-frame, 24, or the bottom rail of the
bottom sash and the adjacent lower part of the window-frame, or between all of such
openings the said improved means of fastening permitting of both sash-frames
being moved together, or of either being closed, from the inside or outside, and
of either being opened from the inside, but preventing the one being moved
independently of the other from the outside so as to increase the desired opening
between them.
In certain modifications, however, I prefer to adapt to the space between the top
rail of the top sash and the adjacent upper part of the window frame when the top
sash is opened, a removable frame, 25, fitted or adapted with perforated zinc or gauze,
as at, 26, and which frame may be readily applied in the raceways, 27, of the top
sash and for the time required secured therein by a bolt or bolts, 28, or other suitable
means adapted to engage with the sides of the window-frame for the purpose of
supporting the said frame, 25, which prevents any draught at such part and is also
instrumental in preventing the entrance of flies and other insects.
The top part of the top sash, 8, may also be adapted with a panel of perforated
zinc or gauze, as indicated by dotted lines at, 29, for affording ventilation at all times,
but when thus adapted, in order that ventilation by such latter means may be closed
off when required, such panel, 29, is adapted with a removable shutter fitting
thereinto and being secured if required by a bolt or bolts, or other suitable or
equivalent ineans.
The said improved means of fastening the sashes in certain desired positions permits
of the sash frames being opened to their fullest extent in an ordinary manner
when the sashes are so moved apart as to cause the bolt, 12, to be disengaged from
the bar, 5.
Having now particularly described and ascertained the nature of the said Inven-
tion and in what manner the same is to be performed; I declare that what I
claim is:-
1. The hereinbefore described improved means of fastening or securing rising and
falling sashes.
2. In such means the use in combination of the bar, 5, bolt, 12, and described means
of controlling and operating the same.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicant.