Improvements in Door Bolt Indicators.
Year: 1894

page_text: Date of Application, 9th June, 1894
Complete Specification Left, 9th Mar., 1895-Accepted, 27th Apr., 1895
Improvements in Door Bolt Indicators.
I JOHN HOWARD CARTLAND of Constitution Hill, Birmingham, Brassfounder,
do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in bolts which exteriorly indicate
occupation (or other chosen sign), of a room, simultaneously with its being fastened
or unfastened upon the interior.
It consists as follows:-The bolt itself may be made similar to an ordinary, bolt
now in use, but in addition thereto I provide upon its side next the door, an arm
which, travels to and fro in a slot formed in the door, as the bolt is shot or with-
drawn. This arin thus extends to the opposite side of the door, and at such
termination is provided with a bevilled plate or cam which acts upon a vertically
sliding plate upon which latter is marked the necessary signs, such as Engaged
Disengaged 9966
"Open" or "Closed" &c. This sliding plate is suitably enclosed in
a frame or box which is secured to the door, and having in its front an opening or
slot hole through which the sign upon the sliding plate may be read.
"6
66
"
Thus, when the belt is withdrawn the cam allows the plate to fall by its own
weight, and present the word "Disengaged" to view, but when shot or fastened the
said cam raises the plate so as to present the word "Engaged" to view. The said
plate may be of any suitable material such as metal, wood or glass, upon which is
engraved, painted or otherwise produced the letters or signs required.
Dated this 8th day of June 1894.
CHARLES T. POWELL,
Applicant's Agent.
Improvements in Door Bolt Indicators.
JOHN HOWARD CARTLAND, of Constitution Hill, Birmingham, Brassfounder,
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 :—
This invention relates to improvements in bolts which exteriorly indicate
occupation (or other chosen sign), of a room, simultaneously with its being fastened
or unfastened upon the interior.
In order to more clearly explain this my invention, I have appended hereunto an
illustrative sheet of drawings upon which are figures aud numbers of reference,
similar numbers referring to similar parts throughout the several views.
Fig. 1, is a view of the indicator as it appears upon the exterior of the door.
Fig. 2, is a view of the bolt upon the interior side of the door.
Fig. 3, is a sectional view of the invention on line A-B (Fig. 1).
Fig. 4, is a detailed rear view of the plate box.
Fig. 5, is a detailed plan view of the bolt and arm.
Fig. 6, is a detailed view of the indicating plate.
Fig. 7, is a detail view of the box cover plate.
Figs. 8 & 9 are sectional and front detailed views of the bevilled plate or cam.

page_text: It consists as follows:-10, is the door, 11, is the door frame. The bolt 12, itself
may be made similar to an ordinary bolt now in use, that is, carried upon the
plate 13, sliding through guides 14, and engaging with the staple 15. In addition
thereto I provide upon the inside of the bolt next the door, an arm 16, which
travels to and fro in a slot 17, formed in the door 10, as the said bolt is shot or
withdrawn. This arm thus extends to the opposite side of the door, and at such
termination is provided with a bevilled plate or cam 18 which acts upon a vertically
sliding plate 19, upon which latter is marked the necessary signs, such as
Engaged ""Vacant" "Open" or "Closed" &c. This sliding plate is suitably
enclosed in a frame or box 20, which is secured to the door, and having in its front
an opening or slot hole 21, through which the sign upon the sliding plate 19, may
be read.
66
It will be noticed that an inclined or bevilled surface is prepared at 22, upon the
plate 19, which agrees with a similar surface at 23, upon the cam 18, so that by
sliding the said cam to the right or left (according as the door may be "right
hand or "left handed") the plate 19 is raised. Thus, when the bolt is withdrawn
as seen in Fig. 2, the cam 18, is placed centrally with the plate 19 and allows the
plate 19, to fall by its own weight to its lowest position, and present the word
"Vacant" to view, but when shot or fastened, the said cam is moved into the
position shown in dotted lines in Fig. 6, and thereby raises the plate 19, so as to
present the word "Engaged to view. The said plate 19, may be of any suitable
material such as metal, wood or glass, upon which is engraved, painted or otherwise
produced the letters or signs required.
"
24, is a cover plate which lies upon parts 25, 26 and 27, and having screw
holes 28, whereby it may be secured, so as to give freedom to the moving parts.
29, is a slot hole through which the arm 16, passes.
Having now particularly described and ascertained the nature of this my said
invention and in what manner the same is to be performed, I declare that what 1
claim is :-
1. In indicator bolts the combination with the bolt 12, and staple 15, and
arm 16, of the cam plate 18, and sliding indicating plate 19, box 20, and opening 21,
all substantially as set forth and illustrated.
2. The employment in indicator bolts, such as are herein described of a vertical
sliding indicating plate 19, having the bevilled surfaces 22, 22, with the sliding
cam 18, having the bevilled surfaces 23, 23, as set forth and shown.
Dated this 8th day of March 1895.
CHARLES T. POWELL,
Applicant's Agent.