IMPROVEMENTS. IN LOCKS
Year: 1870

page_text: LETTERS PATENT to Frederic Whitfield, of the Firm of Samuel
Whitfield and Sons, of Birmingham, in, the County of Warwick,
Manufacturers, for the Invention of "IMPROVEMENTS. IN LOCKS."
Sealed the 18th March 1870, and dated the 21st January 1870.
J
PROVISIONAL SPECIFICATION left by the said Frederic Whitfield at
the Office of the Commissioners of Patents, with his Petition, on
the 21st January 1870.
I, FREDERIC WHITFIELD, of the Firm of Samuel Whitfield and Sons,
of Birmingham, in the County of Warwick, Manufacturers, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN Locks," to.
be as follows:-
My Invention relates to locks of the kind called barrel locks, that is,
locks in which the introduction of the key forces outwards a series
of radial bolts or slides to the distances to which they are required

page_text: respectively to be forced before the key can communicate the required
rotatory motion to the barrel to shoot or withdraw the locking bolt.
My Invention has for its object to prevent the removal of the said
radial bolts or slides either by withdrawing them at the keyhole or by
forcing them out of their slots at the periphery of the barrel. This I
effect in several ways.
According to one of my improvements I fix on the front end of the
barrel a circular plate or disc having a central opening of a sufficient
size to permit the key to pass through. Around this central opening is
a tubular flange a projection which extends a short distance into the
central opening in the barrel and partially covers the ends of the bolts.
Those parts of the ends of the bolts on which the key acts are exposed in
the keyhole in the usual way, and the key can act upon them without
obstruction from the tubular flange or projection around the keyhole.
The said tubular flange or projection however while permitting of the
required motion of the bolts prevents their withdrawal from their slots at
the keyhole.
Another of my improvements consists of a tubular flange or projection
fixed at the periphery of the barrel, the said flange or projection per-
mitting the bolts to slide outwards to the respective distances which the.
action of the lock requires; but preventing them from being wholly
removed from their slots at the periphery of the barrel.
Instead of preventing the removal of the bolts at the central opening
or at the periphery of the barrel by the tubular flanges described the
same object may be effected by means of a ring or rings let into a
circular depression or depressions in the face of the barrel. The radial
bolts are
in this case provided with cross depressions in which the said
ring or rings engage: The said cross depressions in the bolts are of such
a length that they permit the required play in the bolts, but limit their
motion in an inward or outward direction to the extent required by the
action of the lock and prevent their removal from the slots in the barrel
by a sliding motion either inwards or outwards. The first and last
described improvements may be applied to the back instead of the front
of the barrel.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Frederic Whitfield in the Great Scal Patent Office
on the 15th July 1870.
TO. ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERIC
WHITFIELD, of the Firm of Samuel Whitfield and Sons, of. Birmingham,
in the County of Warwick, Manufacturers,, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing, date the Twenty-first day of. January, in the year
of our Lord One thousand eight hundred and seventy, in the thirty-third
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Frederic Whitfield, Her special licence that I;
the said Frederic Whitfield, my executors, administrators, and assigns, or
such others as I, the said Frederic Whitfield, my executors, administrators,
and assigns, should at any time agree with, and no others, from time
to, time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ircland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN LOOKS," upon the
condition (amongst others) that I, the said Frederic Whitfield, my
executors or administrators, by an instrument in writing under my, or
their, or one of their hands and seals, should particularly describe and
ascertain the nature of tlic said Invention, and in what manner the
same was to be performed,, and cause the same to be filed in the Great
Scal Patent Office within six calendar months next and immediately
after the date of the said Letters Patent..
NOW KNOW YE, that I, the said Frederic Whitfield, 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 thereof, that is to say :-
My Invention relates to locks of the kind called barrel- locks, that
is, locks in which the introduction of the key forces outwards a series
of radial bolts or slides to the distances to which they are required
respectively to be forced before the key can communicate the required
rotatory motion to the barrel to shoot. or withdraw the locking bolt.
My Invention has for its object to prevent the removal of the said
radial bolts or slides either by withdrawing them at the keyhole or by.

page_text: forcing them out of their slots at the periphery of the barrel. This I
⚫effect in several ways.
According to one of my improvements I fix on the front end of the barrel
a circular plate or disk having a central opening of a sufficient size to
permit the key to pass through. Around this central opening is a
tubular flange or projection which extends a short distance into the
central opening in the barrel and partially covers the ends of the bolts.
Those parts of the ends of the bolts on which the key acts are exposed
in the keyhole in the usual way, and the key can act upon them without
obstruction from the tubular flange or projection around the keyhole.
The said tubular flange or projection however while permitting of the
required motion of the bolts prevents their withdrawal from their slots
at the keyhole.
Another of my improvements consists of a tubular flange or pro-
jection fixed at the periphery of the barrel, the said flange or projection
permitting the bolts to slide outwards to the respective distances which
the action of the lock requires, but preventing them from being wholly
removed from their slots at the periphery of the barrel.
Instead of preventing the removal of the bolts at the central opening
or at the periphery of the barrel by the tubular flanges described the
same object may be effected by means of a ring or rings let into a circular
depression or depressions in the face of the barrel. The radial bolts are
in this case provided with cross depressions in which the said ring or
rings engage. The said cross depressions in the bolts are of such a
length that they permit the required play in the bolts, but limit their
motion in an inward or outward direction to the extent required by the
action of the lock and prevent their removal from the slots in the barrel
by a sliding motion either inwards or outwards. The first and last
described improvements may be applied to the back instead of the front
of the barrel.
Having explained the nature of my Invention I will proceed to
describe with reference to the accompanying Drawing the manner in
which the same is to be performed.
Figure 1 represents in plan of upper side, Figure 2 in cross section,
and Figure 2* in plan of under side, the principal parts of a barrel lock
containing one of my improvements; Figures 3, 4, and 5 are parts of
the same.

page_text: ん
a, b, are the radial bolts or slides of the lock working respectively in
radial slots in the inner and outer barrels c, d, of the lock and pressed
inwards by the circular spring at the periphery of the outer barrel d;
e is the central pin screwed to the inner rotating barrel c, upon which
the key. takes to press outwards the slides or bolts a, b. The said inner
rotatory barrel c carries at back a disk or plate h provided with a
thrower i, which thrower by the rotation of the inner barrel c shoots or
withdraws the sliding bolt of the lock as is well understood. In order
to prevent the removal of the bolts or slides a at the keyhole of the lock
I fix on the front end of the inner barrel c a circular plate or disk k
having a central opening 7 of sufficient size to permit the key.to pass
through to press outwards the bolts a, b. The plate or disk.k is.shown
separately in plan of under side in Figure 3, and in section and elevation
in Figure 4. Around the central opening of the plate / and on tho
under side thereof is a tubular flange %, which extends a short distance
into the central opening in the barrel c, and partially covers the ends of
the bolts or slides a. By an examination of the section Figure 2, it will
be seen that the tubular flange of the plate or disc k is situated
in front of shoulders on the slides or bolts a, so that the said tubular
flange while permitting of the required motion of the bolts or slides a
outwards prevents their withdrawal from their slots at the keyhole. The
top of the outer barrel is covered by a plain ring m, shown separately in
Figure 5.
In order to prevent the withdrawal of the slides or bolts at the
periphery of the barrel as well as at the keyhole I combine with the
arrangement last described the arrangement of parts represented in the
lock shown in plan in Figure 6, and cross section in Figure 7, a part
being represented in Figure 8. In this arrangement I provide the top
covering plate or disk m. of the outer barrel with a tubular flange or
projection m² situated at the periphery of the said barrel. This covering
plate or disk is represented separately in plan of under side and elevation.
in Figure 8. The flange or projection m² of the said covering plate
permits the bolts or slides 6 to move outwards to the respective distances
which the action of the lock requires, but the said flange in conjunction
with the shoulders on the said slides 6 prevents the said slides being
wholly.removed from their slots at the periphery of the barrel, as will be
understood by an examination of Figure 7.

page_text: Figure 9 represents in cross section a barrel lock containing another of
my improvements; Figure 10 represents in cross section the inner
barrel and its covering plate without the bolts or slides; Figure 11
represents in plan, and Figure 12 in section and clevation the covering
plate of the inner barrel separately; Figure 13 represents one of the bolts
or slides. In this arrangement I make the ring on the under side of
the covering plate or disk k take into a circular depression c² made in
the face of the inner barrel (see Figure 10). The radial bolts or
slides a are provided with cross depressions or cut away parts a² for the
ring ³ to engage in (see Figure 9). The cut away parts a² of the bolts a
are of such a length that they permit the required play in the said bolts,,
but the outward motion of the bolts is limited and the said bolts pre-
vented from being withdrawn at the keyhole by the shoulders on the
bolts bearing against the ring k³ of the covering plate k. When cross
depressions are used instead of the cut away parts a² of the bolts a the
said bolts are prevented from moving inwards or outwards beyond their
proper range by the ring ³ of the covering plate k.
The arrangement last described for preventing the removal of the
slides a at the keyhole may also be applied to the outer barrel d for pre-
venting the removal of its slides b at the periphery of the said barrel,
that is, I provide the covering plate m (Figure 9) with a ring and make
a circular depression in the face of the barrel d for the said ring to
engage in. I also make cross depressions or cut away parts in the slides.
or bolts b.
My several improvements may be applied to barrel locks generally
provided with radial bolts or slides.
Having now described the nature of my Invention, and the manner in
which the same is to be performed, I wish it to be understood that I
do not limit myself to the precise details herein described and illustrated,
as the same may be varied without departing from the nature of my
Invention; but I claim as my Invention of improvements in locks of the
kind called barrel locks,―
Firstly. The arrangement or combination of parts hercin-before
described and illustrated in Figures 1, 2, 2, 3, 4, and 5 of the accom-
panying Drawing for preventing the removal of the radial bolts or slides
of the said locks at the keyholc.

page_text: Secondly. The arrangement or combination of parts herein-before
described and illustrated in Figures 6, 7, and 8 of the accompanying
Drawing for preventing the removal of the radial bolts or slides of the
said locks at the keyhole and at the periphery of the lock.
Thirdly. The arrangement or combination of parts herein-before
described and illustrated in Figures 9, 10, 11, 12, and 13 of the accom-
panying Drawing for preventing the removal of the radial bolts or slides
of the said locks either at the keyhole or at the periphery of the lock.
In witness whereof, I, the said Frederic Whitfield, have hercunto
set my hand and scal, this Fourteenth day of July, in the year
of our Lord One thound eight hundred and seventy.
FREDERIC WHITFIELD. (L.S.)
Witness,
GEORGE SHAW.