Year: 1886

page_text: Date of Application, 13th Dec., 1886.
Complete Left, 3rd Sept., 1887.
Complete Accepted, 4th Oct., 1887.
We, WILLIAM MACHIN and JAMES WHITEHOUSE, both of Dean Street, Heath Town,
Staffordshire, Lock Manufacturers, do hereby declare the nature of this invention to
be as follows:-
Our invention has reference to improvements in the construction and arrangement
of the bolts of certain kinds of padlocks and other locks as herein described, which
bolts as heretofore ordinarily constructed, each consist of a metal bar working in
suitable guides and having a notch on that side which is next to the key and at each
extremity of the said notch a lateral projection. When the key. is turned in the act
of locking or unlocking, the projection or bit on the key works in the said notch and
engages with either one or other of the lateral projections to shoot the bolt forwards
or to withdraw it. In order that the bit on the key may, when inserted in the lock,
fairly enter the notch and engage with the tumbler at the back of the bolt a plate has
heretofore been provided in front of the bolt and carried from the casing of the lock.
The said plate covers or almost covers the said notch and being adjacent to the bolt
prevents the key riding out of the notch until the bolt has been shot to the end of its
travel either backwards or forwards.
Now according to our invention, instead of employing a plate made separate from
the bolt as heretofore we form, in a piece with the bolt, a thin rib which stretches
across from one lateral projection to the other and covers the notch, thus serving the
same purposes as the separate plate above mentioned which latter is by our invention
dispensed with and the cost of making the lock thereby considerably reduced.
Instead of forming the said rib in a piece with the bolt as above described it may
be formed as a separate plate and fixed to the bolt.
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.

page_text: .
We, WILLIAM MACHIN and JAMES WHITEHOUSE, both of Dean Street, Heath Town,
Staffordshire, Lock 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 :-
Our invention has reference to improvements in the construction and arrangement
of the bolts of certain kinds of padlocks and other locks as herein described, which
bolts as heretofore ordinarily constructed, each consist of a metal bar working in
suitable guides and having a notch on that side which is next to the key and at each
extremity of the said notch a lateral projection. When the key is turned in the act
of locking or unlocking, the projection or bit on the key works in the said notch and
engages with either one or other of the lateral projections to shoot the bolt forwards or
to withdraw it. In order that the bit on the key may, when inserted in the lock,
fairly enter the notch and engage with the tumbler at the back of the bolt a plate has
heretofore been provided in front of the bolt and carried from the casing of the lock.
The said plate covers or almost covers the said notch and being adjacent to the bolt
prevents the key riding out of the notch until the bolt has been shot to the end of its
travel either backwards or forwards.
Now according to our invention, instead of employing a plate made separate from
the bolt as heretofore we form, in a piece with the bolt, a thin rib which stretches
across from one lateral projection to the other and covers the notch, thus serving the
same purposes as the separate plate above mentioned which latter is by our invention
dispensed with and the cost of making the lock thereby considerably reduced.
Instead of forming the said rib in a piece with the bolt as above described it may
be formed as a separate plate and fixed to the bolt.
We will now proceed to describe with reference to the accompanying drawings, the
manner in which this invention is to be performed.
Fig. 1 represents in sectional front elevation and Fig. 2 in vertical section part of
what is known as a double chambered padlock embodying our invention the bolt and
tumbler being represented in the positions which they occupy when the bolt is in its
locked position; Fig. 3 is a sectional front elevation and Figs. 4 and 5 are vertical
sections of the same lock shewing the bolt partly unlocked; Figs. 6 and 7 respectively
represent the bolt and tumbler of the same.
Fig. 8 represents in sectional front elevation and Fig. 9 in vertical section part of
a back spring double chambered padlock in which no tumbler is used, constructed
according to our invention, the bolt being represented in the position which it occupies
when in its locked position; Fig. 10 is a sectional front elevation and Fig. 11 is a
vertical section of the lock represented by Figs. 8 and 9 shewing the key partly
turned round in the act of unlocking the lock; Fig. 12 represents the bolt of the
same separately Fig. 13 shews part of the casing of the locks represented by

page_text: the preceeding Figures; Figs. 14, 15 and 16 illustrate a modified form of the bolt as
hereinafter described and Figs. 17 and 18 shew how a key having a side ward can be
used with a bolt constructed according to our invention.
The same letters of reference indicate corresponding parts in the several Figures of
the drawings.
Referring firstly more particularly to Figs. 1 to 7, both inclusive, a is the padlock
casing, b is part of the bow shackle, c is the bolt, d₁, dare the guides in which the
bolt works, e is the tumbler, fis the pin on which the tumbler turns, g is the spring
pressing on the tumbler e, h is the pin on which the key i turns and is the vertical
key hole. c, c are the two lateral projections on the bolt e having between them the
notch in which the bit on the key works and is the thin rib which according to
our invention is provided and formed in a piece with the bolt c and which stretches
across the notch c* from one lateral projection c³ to the other lateral projection c³.
It will be seen that this rib or web k answers the same purposes as the usual plate
carried from the casing, for when the key is inserted in the key-hole one of its bits
comes on to the face of the rib k (see Figs. 2 and 3) and the key then has to be turned
round nearly a quarter of a revolution before it can be pushed home, when on turning
the key to lock or unlock the bolt one of its bits will pass under the rib k (see Figs.
and 4) and fairly enter the notch e* and engage with the tumbler.
The guides d', d² in which the bolt c works are preferably made as represented on
the drawings the guide d' having a rectangular hole! (see Fig. 13) and the guide d² a
slotted hole m in both of which the bolt c fits loosely and it is kept in the slotted
hole m by a projecting rib n on the tumbler e.
In the padlock represented by Figs. 8 to 13, both inclusive in which no tumbler is
used, the bolt c is provided with a rib k stretching across the notch c* similarly to the
rib k above described with reference to Figs. 1 to 7 and the bolt is kept in the slotted
hole m by the spring g¹ pressing upon it.
In the bolt represented by Figs. 14, 15 and 16 the rib & is made separate from the
bolt c and fixed thereto by any convenient means such for instance as by projecting
pins o formed on the bolt which pass through holes in the plate where they are
rivetted over to secure the plate and bolt together.
A key q having a side ward p can, as shewn by Figs. 17 and 18, be used with a
bolt constructed according to this invention by so arranging the ward p in the key
that when the key q is turned round to lock or unlock the bolt the rib k will enter the
ward p. It will be seen that any key of a similar size to the key y but not having
the side ward p would not unlock or lock the bolt.
Our invention above described and illustrated as applied to padlocks can be
similarly applied to other locks in which the bolt has a notch for the key and two
lateral projections as above described.
Having now particularly described and ascertained the nature of our said Inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
In padlocks and other locks provided with a bolt having a side notch which the key
enters in locking and unlocking the bolt, the application and use of a rib or web k,
formed with the bolt or made separately and fixed thereto, which rib or web covers
the said notch substantially as and for the purposes herein described and set forth.
Dated this 1st day of September 1887.
WILLIAM MACHIN.
JAMES WHITEHOUSE.