A Solid Corrugated Door Bolt Plate
Year: 1898

page_text: Date of Application, 4th Jan., 1898
Complete Specification Left, 4th Oct., 1898-Accepted, 5th Nov., 1898
A Solid Corrugated Door Bolt Plate
GEORGE CARTHR and HERBERT GEORGE CARTER, Press and Press Tool Makers,
91, Lower Lichfield Street, Willenhall, Staffordshire, do hereby declare the nature
of this invention to be as follows:-
Instead of sockets being riveted on the plate, or pieces turned round the bolt
these sockets are stamped from the plate itself, forming a channel for the belt to
Blide in.
This process we can apply to bolts of any shape.
We, GEORGE CARTER and HERBERT GEORGE CARTER, both of 91, Lower
Lichfield Street, Willenhall, Staffordshire, Press Tool Makers, do hereby declare
the nature of this invention and in what manner the same 18 to be per.
formed, to be particularly described and ascertained in and by the following
statement.-
--
This invention consists of the herein described new or improved corrugated
door bolt plate in which the sockets are stamped from the plate itself to form a
channel for the bolt to slide in, instead of the usual construction in which the
sockets are formed separately from and vetted on to a plate or are made of pieces
lapped round to form the sockets Our invention enables the door bolt plates to be
made very strong and cheap.
Our invention 18 illustrated by the accompanying drawings on which
Eig 118 a side elevation and Fig 2 is a plan of our new or improved solid
corrugated door bolt plate,
Fig. 3 is a cross section of the same on line X X of Figa. 1 and 2
Fig. 4 18 a oross section of the same on line Y Y of Figs. 1 and 2, and
Fig. 5 18 & sheet metal blank from which the said door bolt plate is formed
The same letters of reference indicate the same parts in all the figures.
In carrying out this invention we take a rectangular sheet metal blank A having
the same shape as the required door bolt plate and somewhat wider than the same
In this plate we piaroe holes a¹ a³ a³ a² a³ a of which the holes a¹ a are BQ
situated that the intermediate part 6 will form the first socket 1 of the finished
door bolt plate and the part 6, intermediate between the holes a at, will form
the second socket 6. The hole a is made wide enough to receive the side

page_text: projecting part of the bolt C (Fig 2) and has a central tongue part a' on which
the back end of the bolt Ches when the bolt is shot forward as shown by Fig 2.
The holes as a correspond with the position of the said projecting part of the
bolt C when the latter is withdrawn to its back position on the plate
By means of a pair of top and bottom dies worked in a stamp or press the
blank A, shown by Fig 5, is at one operation corrugated and raised into the shape
shewn by Figs 1, 2, 8, and 4, that 18 to say, there are two longitudinal
corrugations d¹² extending from end to end of the plate and rising to about the
centre cross line of the bolt and the parts 61 62 are raised up so as to form the socket
or bridge continued from one corrugation d to the other corrugation d² The
plate is pressed backwardly at and ate between these sockets forming a trough
to receive the bolt C The part of the plate beyond the socket 6* 18 similarly
pressed backwardly between the corrugations d' dao as to form a continuation
of the channel and now the hole a will forn a recess at in each of the
corrugations d d³ to receive the projecting part c of the bolt C when the latter
18 shot forward, and the other two holes as a will form corresponding recesses
in the corrugations to receive the projecting part cl of the bolt when the
latter is shot back. ef is a cross bar which is pressed out of the plate between the
holes as a and the and of the plate, to form a stop to limit the backward move-
ment of the bolt C.
We have not shewn on our drawing the pair of dies for stamping as above
described the blank A at one operation into the corrugated door bolt plate shewn
by Figs 1, 2, 3 and 4 as such dies form no part of this invention, but any die
sinker of ordinary skill will readily be able to make the said dies from the drawing
of the finished door bolt plate shown by Figs. 1, 2, 3, and 4
It will be understood that if desired our solid corrugated door bolt plate can
be made with only one or with more than two of the cross bridges b¹ 63, and in
this case if the plate has only one of the cross bridges the gross alots a² a* will
be omitted but if the finished door bolt plate is to have more than two of
the cross bridges the blank will be made with cross alata such as a² to
correspond.
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
olaim is :-
The new or improved solid corrugated door bolt plate consisting of a sheet metal
blank pierced and coringated in the manner substantially as described and
illlustrated.