Improvements in the Manufacture of the Parts of Lock-furniture called Thread-escutcheons
Year: 1892

page_text: Date of Application, 14th Apr., 1892
Complete Specification Left. 11th Jan., 1893-Accepted, 25th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of the Parts of Lock-furniture
called Thread-escutcheons.
We, GEORGE HOOKHAM and PHILIP HOOкHAM of 7 & 8 New Bartholomew
Street Birmingham Manufacturers do hereby declare the nature of this invention
to be as follows :-
Halder
Referring to the Complete Specification of Letters Patent, granted to us, and
numbered 1308/1886 entitled "Improvements in the manufacture of the parts of
lock-furniture called thread-escutcheons," it has been found in practice that the
surface of the thread-escutcheon, which comes in contact with the woodwork, is too
smooth, and the thread-escutcheon is therefore liable to be pulled out, when the
key is inserted, and withdrawn.
To overcome this we raise by pressure upon the surface of the thread-escutcheon
which comes in contact with the woodwork projections or ribs of metal at distances
preferably about one sixteenth of an inch apart, and running from back to front of
the thread-escutcheon. The ribs are preferably V-shaped, the points of the V lying
towards the face of the thread-escutcheon, and the broader portion of the V lying
towards the back of the thread-escutcheon. The object of this is that, the spaces
between the ribs being also approximately V-shaped, when the thread-escutcheon
is driven into the wood, the wood itself tends to close over, and dovetail into these
spaces, and hold the thread escutcheon firmly.
Dated this 13th day of April 1892.
GEORGE HOOKHAM.
PHILIP HOOKHAM.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of the Parts of Lock-furniture
called Thread-escutcheons.
We, GEORGE HооккAM and PHILIP HOOкHAM, both of Nos. 7 & 8, New
Bartholomew Street Birmingham, in the County of Warwick, Manufacturers,
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:—
Referring to the Complete Specification of Letters Patent granted to us and
numbered 1308/1886, it has been found in practice that the surface of the thread-
escutcheon which comes in contact with the wood-work, in which it is fixed, is too
smooth, and the thread-escutcheon is therefore liable to be pulled out, when the
key is inserted and withdrawn.
To overcome this, we raise, by pressure upon the surface of the thread-
escutcheon, which comes in contact with the woodwork, projections or ribs of
metal at distances, preferably, about 1 inch apart, and running from back to front
of the thread escutcheon. The ribs are, preferably, V-shaped, the point of the V
lying towards the face of the thread escutcheon, and the broader portion of
the V lying towards the back of the thread-escutcheon. The object of this
is, that, the spaces between the ribs being also approximately V-shaped, when the
escutcheon is driven into the wood, the wood itself tends to close over and dovetail
into these spaces, and hold the thread-escutcheon firmly.

page_text: We will now proceed to describe with reference to the accompanying drawings
the manner in which our invention is to be performed.
Figure 1. represents a side view of our improved thread-escutcheon with the
raised projections or ribs as a.
Figure 2. is an enlarged view of the tool shown at Figure 16 of the drawings of
the above-mentioned Specification No. 1308, 1886, but with recessed portions, as a₁,
suitable for producing the projections, as a in Fig. 1.
The tools and method used for producing our improved thread-escutcheon are
identical with those described and illustrated in our Specification No. 1308/1886,
except that the tool illustrated in Figs. 13 and 16 of that Specification is modified
in the manner above described and illustrated in Fig. 2 of the present Specification.
According to our present method a tool having the recessed portions illustrated in
Fig. 2 of the present Specification is substituted for the tool illustrated in Figs. 13
and 16 of the former Specification; all other tools and processes remaining the
same. The recessed portions of Fig. 2 may be conveniently produced with a small
round file.
Having now particularly described and ascertained the nature of our inven-
tion and the manner in which the same is to be performed we declare that we
claim as our invention of "Improvements in the manufacture of the parts of lock
furniture called thread-escutcheons
First. Manufacturing the said thread-escutcheons with raised portions on the
parts coming in contact with the wood of the key-hole substantially as herein
before described, and illustrated in the accompanying drawings.
Secondly. Making the said thread-escutcheons with raised projections, the said
process being carried into effect by the use of the tool herein before described and
illustrated in Fig. 2 of the accompanying drawings.
Dated this 10th day of January 1893.
GEORGE HOOKHAM.
PHILIP HOOKHAM.