Improvements in and in connection with Lock Bolts.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in and in connection with Lock Bolts.
VINCENT DUGMORE, Lock Maker, 24, Drummond Street, Wolverhampton, du
hereby declare the nature of this invention to be as follows:-
+
The part usually called a lock bolt has three so called parts, riz." head, tail,
and stump. When the head and tail are required of one thickness they are
usually pressed or stamped out. When the head and tail are required to be
thick and thin in relation to each other. They are cast or built up in sections.
When the head is required to be brass and the tail iron. They are cast in
a mould and the iron tail is laid in the sand and brass or other metal is poured
in forming the head on the tail. This latter method is very unsatisfactory
as the brass is liable to loosen on the iron also there is great difficulty in getting
the iron tail into a perfectly accurate position.
My improved method of making so called lock bolts and parts is as follows.
The heads I form seperately from the tails of any metal or dimentions then
a round saw or mill (of the same) thickness as the tail) is run into the head
(say) a third or more of its diameter forming a recess in head.
The tail is formed separately the end shaped to fit into head. By milling
into head higher or lower so the tail will be higher or lower from base,
as required.
The method of fastening can be by peg screw, soldered or clinched. By
this method a hardened steel head can be put on a brass or iron tail.
In connection with the above I have an improved method of applying the so
called bolt stump The stump is usually cast rivitted or bent on the tail
My method is as follows.
The place where the so called stump is usually attached I pierce a hole the
same shape as the stump then a piece is formed with an arm of any desired
length which is bent up and passed through the said hole which makes the bolt
stump. The end of the base of this piece having a slot passes over a so called
running stump and slides up and down with the bolt, making a complete bolt.
This stump being detachable from bolt enables it to be hardened if necessary.
This method makes a lock bolt much stronger and cheaper than is now in use.
In connection with above I have an improved method of making the cap or
cover for locks, especially so called cabinet locks, where the edges or corners
are required to be perfectly sharp and square. My method is as follows. The
metal is drawn of a section with a top and sides, cut to lengths and with a very
small saw or mill a groove is cut on insides of sides very close to edge then a
piece is formed and milled to match so that it slides in and comes perfectly
square on end.
Dated this 30th day of September 1899.

page_text: Improvements in and in connection with Lock Bolts.
VINCENT DUGMORE, Lock Maker, 24, Drummond Street, Wolverhampton, in
the County of Stafford, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:—
This invention relates to lock bolts and connections of lock bolts. A lock
bolt has three so called parts, head tail, and stump. The usual method of
producing lock bolts is either by casting or forging. When the tail and head
are required of same thickness they are usually stamped out. When
the head is required thicker than the tail they are either cast, forged, or built
up of sections.
When the head is required brass and the tail iron the brass head is cast on the
iron tail. Fig. 1 is a section view of the usual lock bolt. Head" tail and
stump My improved method of making lock bolts and parts is as follows.
Fig. 2. The heads I form separate from the tails of any metal or dimen-
tions required, then a round saw or mill of the same thickness as the tail is run
into the head a third or more of its diameter forming a recess ".
Fig. 3. The tail is formed seperately with the end shaped to fit into recess of
head.
Fig. 4 shews tail driven into head. By milling the recess in head higher or
lower, so the tail will be higher or lower as required. The method of fastening
can be by peg screw, clinched or soldered. By this method a hardened steel
head can be put on a tail of any metal. In connection with above I have an
improved method of applying the so called bolt stump which is usually cast rivited
or bent on tail. My new method is as follows. The place where the stump is
usually attached on bolt tail I pierce a hole of same shape as stump then a
piece is formed Fig. 5 with an arm * of any desired length which is bent
up and passed through said hole which makes the bolt stump. The end of
Fig. 5 having a slot passes over a so called running stump with bolt makes a
complete bolt. This stump being detachable from the tail enables it to be of
steel and hardened if necessary.
Fig. 7 shews a complete section of my improved lock bolt and stump.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
1st. The making of lock bolts with solid heads of any metal with the tails
of other metal than the head or either one or both of steel and hardened if
required.
2nd. The making of the bolt stump detachable which does away with the
usual riviting.
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