IMPROVEMENTS IN BOLTS OR FASTENINGS FOR SHUTTERS, BLINDS AND DOORS
Year: 1885

page_text: and Doors.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Win. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for IMPROVEMENTS IN
BOLTS OR FASTENINGS FOR SHUTTERS, BLINDS AND DOORS a communication to me
from abroad by John Von Hollen of Charleston in the County of Charleston and
State of South Carolina, United States of America, Grocer, to be as follows:-
-
This invention relates to a bolt or catch more especially adapted for locking
shutter bars over outside window shutters or blinds or warehouse shutters and for
retaining such window shutters or blinds in the open position the object-of the
invention being to afford a wide range of adjustment of the extensible bolt or
catch so that but few sizes of the bolt will be required.
The invention consists essentially in a bolt or catch made in two parts screwed
together so as to be adjustable in length and having a conical head behind which a
sliding latch mounted on the window frame, wall or shutter drops the said bolt
being either applied to the shutter bar or fixed in suitable position according as it
is used to lock the shutters in the closed or open positions.
The one part of the bolt is a tubular socket having a head at one end and tapped
to receive the screwed shank of the other part. The outer end of this part has a
conical head forming a shoulder behind which a latch plate is adapted to engage
and also a collar which serves to steady the forward end of the bolt by bearing
against the sides of the opening made in the window frame or wall of a building
through which the bolt passes when used to lock a bar over closed outside shutters
or blinds and the collar serves also to confine the sliding latch plate between it
and the shoulder of the conical head when the extensible bolt is used to hold or
lock the shutters or blinds in the open position in which case the collar prevents
noisy slamming of the blind against the wall of the house.
The latch consists preferably of a slotted plate sliding on guide studs and notched
at the lower end to fit over and partly around the neck of the bolt just behind its
conical head.

page_text: This latch is mounted on the inside of the window frame or the wall of the
house when used for lucking the shutters or blinds closed or to the inside faces of
the shutters when used for locking them open.
The shutter bar is pivoted at one end to one side of the window frame or wall-
In the former case the bolt is passed through a hole in the end of a pivoted shutter
bar and through a hole coinciding therewith in the window frame or wall. The
conical head of the bolt in passing through the latter hole strikes the lower end of
the latch plate mounted immediately over said hole lifts and passes it, the latch
plate then dropping behind the conical head; and securely locking the bolt and
shutter bar.
If desired a similar bolt and latch may be used at both ends of the shutter bar
allowing the bar to be wholly removed from the window frame when the shutters
are opened or taken down.
When the bolt is used for holding window shutters or blinds open it is fixed
against the wall so that when the shutter swings back, open the latch thereon will
strike the conical head of the bolt and lock behind it-The adjustment of the
length of the bolt enables one size of bolt to be used to accommodate varying
thicknesses of shutters or window frames or. any special style of blind hinges which.
may throw the face of the open blind more or less distant from the wall of the
building bence but few sizes of the extensible bolt will be required.
The two parts of the bolt are secured after adjustment by a set screw.
I have described the bolt as applied to use in holding shutter bars in place over
closed shutters, and for. holding shutters open, but it may be used with doors or
other objects to bar them or hold them open, as will,readily be understood.

page_text: COMPLETE SPECIFICATION.
Improvements in Bolts or Fastenings for Shutters, Blinds,
and Doors.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Win. Clark, of
53, Chancery Lane; in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of this Invention (a communication to me
from abroad by John Von Hollen, of Charleston, in. the County of Charleston, and
State of South Carolina, United States of America; Grocer) and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
This Invention relates to a bolt or catch, more especially adapted for locking
shutter bars over outside window shutters, or blinds, or warehouse shutters, and
for retaining such window shutters or blinds in the open position, the object of the
Invention being to afford a wide range of adjustment of the extensible bolt or
catch so that but few sizes of the bolt will be required.
The Invention consists essentially in a bolt or catch made in two parts screwed
together so as to be adjustable in length, and having a conical head behind which a
sliding latch mounted on the window frame, wall, or shutter, drops, the said bolt
being either applied to the shutter bar or fixed in suitable position, according as it
is used to lock the shutters in the closed or open positions.
The Invention consists also in various constructions and combinations of parts of
the bolt and fastenings; all as bereinafter fully described and claimed.
Reference is to be had to the accompanying drawings forming part of this
specification, in which similar letters of reference indicate corresponding parts in
all the Figures.
Figure 1 is an outside view of a pair of closed shutters secured by the improved
bolt and fastenings.
Figure 2 is a side elevation of the extensible catch of the bolt.
Figure 3 is an end view of the bolt catch and face view of the latch.
Figure 4 shows the improved bolt applied for.holding a window shutter or blind
open.
Figure 5 is a detail vertical sectional elevation taken on the line xx Figure 1
and drawn to a larger scale, and
Figure 6 is a detail vertical sectional elevation taken on the line y y Figure 4
and drawn to a larger scale.
A indicates the extensible bolt, and B the latch. The part A¹ of the bolt is.
hollow, and has at its outer end a¹ un internal screw-thread in which the threaded
sbank a of the part A is received so that it may be screwed out or in; to make
the bolt longer or shorter as may be required. The outer end of the part A² is
provided with a conical head forming a shoulder c behind which the latch
plate B is adapted to engage. On the part A' and about three quarters of an inch
more or less from the head C is formed or fixed the collar D which is of about the
same diameter as the part A¹ of the bolt. The object of the collar D is to steady

page_text: the forward end part A2 of the bolt by bearing against the sides of an opening e
made in the window frame or wall E of a building, through which the bolt passes
when used to lock a bar F over the closed shutters or blinds G as indicated in
Figures 1. and 5. and the collar D serves also to confine the sliding plate B' of the
latch B between it and the shoulder c of head C when the extensible, bolt is
used to hold or lock the shutters or blinds G in the open position as shown in
Figures 4 and 6, in which case the collar prevents noisy slamming of the blind
against the wall of the house.
The latch B in its preferred form consists of a plate B¹ which is notched at the
lower end as at H. to fit over and partly around the bolt A behind its head C and
is held by screws.bb to the other part or face plate B2 of the latch which plate B²
is to be fastened by screws or bolts b² to the inside of the window frame or wall E
in locking the shutters or blinds G, closed, or to the inside faces of the shutters, for
locking them open. The plate B' is slotted at 61 for the passage of the screws bb,
and to let it slide along the screws for guides to its movements. It will be under-
stood, however, that the face plate B' may be dispensed with and the plate B¹
alone be used in which case the screws bb would hold the plate so that it may
slide directly against the frame E or shutter G, but by using the face plate B* the
latch will be more firmly held to place and will itself hold the catch bolt A more
⚫ securely.
I prefer to form a notch I at the lower end of the plate B₁ so that the plate may
curve around the bolt and stand behind the lower end H so as to support it more
firmly.
As shown the shutter bar F is pivoted at its upper end on a bolt f to one side of
the window frame or wall E so as to hang down on said bolt when the shutters or
blinds G are open and when the shutters are closed the bar F will be swung over
the shutters until a hole f1 at the other end of the bar coincides with the hole e in
the frame, or wall E and the bolt A having been adjusted to proper length by
screwing its part A3 in or out of the part A' will then be passed through the
holes fe, and its conical head C will strike the lower end of the latch plate B³
which is fastened to the inside of the frame E, and lift and pass it, when the
plate B will drop behind the head C and the fastening is complete, the head or
collar a of the bolt then striking the face of bar F. See Figure 5.
It is evident that the bolt A cannot be removed from the outside, as the inside
plate B2 must first be lifted before the bolt can be withdrawn, hence the shutters
will be securely barred. If desired a bolt catch A and latch B may be used at
both ends of the bar F, allowing the bar to be removed from the window frame,
when the shutters are opened or taken down.
When the bolt A is used for holding window shutters or blinds open its part A¹
will be fastened suitably to the wall J. so that when the shutter G swings back
open the latch plate B will strike the head C of the bolt and lock behind it as
illustrated in Figures 4 and 6. It will be seen that the part A² of the bolt
may be
secured in or out of the part A¹ so that one size of bolt may be used to accom-
modate varying thicknesses of shutters, or window frames, or any special style of
blind hinges which may throw the face of the open blind more or less distant from
the wall of the building, hence but few sizes of the extensible bolt will be required.
The two parts A' A2 of the bolt are secured after adjustment, by a set screw d to
prevent part A from turning in or out, and hold the bolt at the desired length.
I have described the bolt A as applied to use in holding shutter-bars in place
over closed shutters, and for holding shutters open, but it may be used with doors,
or other objects, to bar them, or hold them open, as will readily be understood.
Having now particularly described; and ascertained the nature of the said
Invention; and in what manner the same is to be performed I declare that what
I claim is
1st The combination of a shutter bolt A formed of two parts A1 A2 screwed
together said part A˚ having a conical head and sliding latch Bl fitted to the

page_text: window frame, the wall, or shutter, and adapted to engage the bolt or catch A
behind its head C, substantially as shown or described.
2nd As a new and improved article of manufacture a shutter bolt or catch made
of a tubular screw-threaded part A¹ and a screw threaded and headed part A'
adapted to be adjusted in the part A¹ to vary the length of the bolt or catch
substantially as shown and described.
3rd As an improved article of manufacture, a shutter bolt or catch made of a
tubular screw-threaded part A¹ having a head or collar a¹ and a screw threaded
and conically headed part A' adapted to be adjusted in the part A to vary the
length of the bolt or catch, and said part A' having the collar D substantially as
herein set forth.
4th The combination with the parts A' A² of the shutter bolt screwed together
and constructed with the collar or head a' conical head C and collar D as specified,
of the set screw d substantially as herein set forth.
5th The combination in a shutter fastening, and with the bar F laid over the
window shutters of an extensible catch A formed of two parts A¹ A² screwed to
each other, part A¹ having a head or collar a¹ and the part A² having a conical
head C and a sliding latch plate B' fitted to the window frame or wall, and
adapted to engage the bolt or catch behind its head C, substantially as herein set
forth.