A. NEW OR IMPROVED DEVICE FOR
Year: 1882

page_text: LETTERS PATENT to Ernesto Guattari of Shirland Gardens Paddington in the
County of Middlesex for an Invention of A. NEW OR IMPROVED DEVICE FOR
LETTERS PATENT to Ernesto Guattari of Shirland Gardens Paddington in the
County of Middlesex for an Invention of A. NEW OR IMPROVED DEVICE FOR
PREVENTING THE SURREPTITIOUS OPENING OF DOORS AND WINDOWS
PROVISIONAL SPECIFICATION left by the said Ernesto Guattari at the
Office of the Commissioners of Patents on the 13th October 1882.
"
ERNESTO GUATTARI of Shirland Gardens Paddington in the County of Middlesex
'A NEW OR IMPROVED DEVICE FOR PREVENTING THE SURBEPTITIOUS OPENING OF
DOORS AND WINDOWS."
This invention relates to a portable or pocket door and window fastener for the
use of travellers and others in hotels and other places. It consists of a stem or
plug of steel brass or other metal, of cylindrical form and furnished with two sets
of diametrically opposite teeth or spikes and with a crossbar or handle for rotating
it. The plug or stem may be cylindrical or tapered and the teeth or spikes may
be set at right angles or obliquely to the axis, and the crossbar may either be
permanently attached (whether rigid or loose) to the stem or may be detachable
therefrom. The head of the stem may be provided with a button hook and the
point of the stem may be shaped for use as a screw driver.
The fastener is to be inserted in the crevice or joint between the door and the
door frame or between the sashes of a window, and to be turned a quarter round
so that the two sets of teeth or spikes are respectively embedded in the opposing
surfaces between which the device is placed thus effectually locking them together.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Ernesto Guattari in the Great Seal Patent Office on the
13th April 1883.
ERNESTO GUATTARI of Shirland Gardens Paddington in the County of Middlesex
"A NEW OR IMPROVED DEVICE FOR PREVENTING THE SURREPTITIOUS OPENING OF
DOORS AND WINDOWS
و"
This Invention relates to a portable or pocket door and window fastener for the
use of travellers and others, in hotels and other places. It consists of a stem or
plug furnished with two diametrically opposite rows of teeth or spikes and with a
cross bar or handle for rotating it. The stem may be cylindrical or tapered and
the teeth may be set at right angles to the axis or obliquely and the cross bar may
either be permanently attached (whether rigid or loose) to the stem, or may be
detachable therefrom. The head of the stem may be provided with button hook
and the point of the stem may be shaped for use as a screw driver.
The fastener is to be inserted in the crevice or joint between the door and the
door frame, or between the meeting rails of window sashes, and to be turned a
quarter round so that the two rows of teeth or spikes are forcibly embedded in the
two opposing surfaces between which the device is placed, thus effectually locking
together the door and frame, or the two window sashes, as the case may be.
DESCRIPTION OF DRAWINGS
Figures 1 and 2 are views at right angles to one another, and Figure 3 is an end
view of one form of door or window fastener. Figure 4 shows the same made
with a detachable cross handle. Figures 5 and 6 show the fastener provided with
a guard for carrying in the pocket, and Figure 7 shows the spikes set obliquely on
the stem as in Figures 5 and 6. a is the stem preferably of steel and b are two
opposite rows of spikes forged on the stem and ground to the two edged and
pointed form shown. c is the cross bar which is forged in one with the stem a in
Figure 1. I may further utilize the cross bar c for the attachment of other
necessary pocket articles. For instance it may be provided with a button hook d,
a nail cleaner e, and a watch key at f, whilst the end g of the stem may have a seal
engraved thereon or be fashioned as a screw driver. The device may be attached
by the button hook d to the swivel of a watch or other pocket chain.
In Figure 4 the cross bar and head of the stem are made separate from the
spiked stem proper, the two being fitted together by a half round or squared
part a on the former fitting in a corresponding cavity in the latter, so that when
the spiked stem has been fixed between the door and its frame the cross bar may
be removed, leaving the spiked stem immovably embedded between the door and
frame, from which it can only be withdrawn by the aid of a similar means of
turning it, whereby all the security of a good lock is obtained.
In Figure 5 the device resembles a pocket button hook, the stem a being pivoted
upon a pin passing through the extremities of a bow h¹ so that it may either be
turned within the bow, as shown in the figure, for carrying in the pocket, or turned
outwards into line therewith.
In Figure 6 the guard frame is separate from the stem and has straight limbs
grooved on the inner opposite sides to receive and protect the points of the spikes
which slide between them as shown. The guard & serves also as the cross handle in
this case, for which purpose one of its limbs is passed through a hole a² in the head
of the stein.

page_text: In Figures 1. 2. 3. 4 the spikes are at right angles to the axis of the stem, and in
Figures 5. 6. 7 they are set obliquely so as to act as segments of screw threads and
tend to force or draw the stem inwards between the door and door frame.
Having described the nature of the Invention and the manner of performing the
Bame I declare that what I claim as the Invention to be protected by the herein-
before in part recited Letters Patent is―
The respective arrangements of the door or window fastener, substantially as
herein described and shown in the respective figures of the drawings, and which
consists of a stem or plug with two diametrically opposite rows of teeth or spikes
for application between a door and its frame, or between the sashes of a window, as
specified.
In witness whereof I the said Ernesto Guattari have hereunto set my hand
and seal this thirteenth day of April in the year of our Lord One thousand
eight hundred and eighty three.