An Improved Bolt for Fixing Doors in any Required Position.
Year: 1889

page_text: Date of Application, 23rd Dec., 1889-Accepted, 25th Jan., 1890
COMPLETE SPECIFICATION.
An Improved Bolt for Fixing Doors in any Required Position.
I THOMAS KENDRICK of Summer Lane Birmingham in the County of Warwick,
Manufacturer, 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, reference being had to the accompanying drawings and
to the Figures and letters marked thereon :-
My Invention consists of a bolt having a pad disc or boss preferably of an elastic or
compressable material at its extremity preferably of Indian rubber, which may be
attached to a door for the purpose of keeping the same open, when so required in any
position. The need for a contrivance of this nature is well known and "door-porters
or weights have hitherto been brought into requisition where it has been found
necessary to keep doors open either for the purpose of ventilation or for convenience.
The existing contrivances have been found to be inconvenient and dangerous besides
being attended by injury both to the door and to the covering of the floor.
The object of my invention is to provide a simple, inexpensive and easily applied
bolt which may readily be attached to any door, and which, while it holds the door in
any required position with sufficient firmness is yet elastic in its pressure, and
therefore its use is unattended by injury to the carpet or other floor covering and
which is equally applicable to doors, being either upon parallel or rising hinges. But
in some instances the elastic pad may be dispensed with, the bolt terminating with a
plate or disc.
This I effect by constructing a bolt consisting of a vertical rod working in brackets
attached to a plate which my be screwed to the door in the ordinary way, the said rod
having (preferably) a box cap or cup at its lower extremity in which is fitted an
elastic pad of India rubber or other suitable elastic or yeilding substance, which when
the bolt is operated presses firmly upon the floor, and so secures the door at the
required angle.
I will now proceed to describe, in connection with the accompanying drawings,
some of the ways in which I propose to carry my invention into effect.
Fig. 1. shews a bolt attached to a door, the rod, A, having a screw thread
throughout the whole or part of its length, and working in brackets, B. B., either or
both of which have also an internal screw thread. By rotating this rod, the bolt
ascends and presses the pad, C., upon the floor. The cap, D., is attached to the rod so
as to turn easily, and so obviate all friction with the floor or carpeting.
Fig. 2 shews the bolt actuated by a cam, E., by means of which it may be applied
by one movement, the operation of screwing being avoided. The cam E., is perforated
by a quadrant-shaped slot E through which a pin passes, connecting the same to the
bolt, so that by lifting the arm or lever E of the cani E the bolt is raised and the
door freed, the form of the cam being such that when thus raised it will be kept in
position by the spring E³, and hold up the bolt until again lowered by moving the
arm E.
Fig. 3 illustrates a similar form of my invention to that shewn in Fig. 2. In this
case the perforation or slot of the cam is dispensed with, the bolt being elevated, on
being released from the pressure of the cam, by a spiral spring, which may be enclosed
within a tubular casing fixed between the brackets B. B., and which is shewn in
section at F.
The cam may be made to work parallel to the door, instead of at fight angles from
it, and so obviate all avoidable projections.
T
A inside aluation of a
tha davalaniment of my invention
In this

page_text: spring, G., is fitted into the plate of the bolt, and engages in the notched or tootherl
parts of the bolt after the manner of a ratchet, holding the bolt firmly when pressed
down upon the floor. To free the bolt, the rod is turned partly round so as to turn
the spring out of the notches, leaving it pressing against the plain side of the rod,
when the bolt can easily be raised the pressure of the spring being sufficient to keep
the bolt from falling back upon the floor. A stop is shewn at H which, by coming
in contact with the wing or fin shewn in connection with one of the brackets B¹³,
regulates the positions of the rod with regard to the spring or catch, G.
The above described Figures have illustrated forms in which my invention may
readily be applied by screwing the bolt simply upon the door. Where greater
neatness of appearance of consistency with any existing door-furniture are desired,
the bolt may be morticed or let into the door, as shewn in Fig. 5. A spiral spring,
similar to that shewn in Fig. 3 is employed and is so attached to the bar or rod of the
bolt that it not only elevates the same, keeping the pad clear of the floor, but it also
presses the arm or lever K., against the toothed or notched edge of the slot, L., in
which it works.
This arm or lever is constructed so as to engage in the notches of the side of the
slot when the bolt is pressed down. In releasing the bolt it is simply necessary to
press the lever or arm laterally to free it from the notches above referred to, when
the bolt will immediately fly up.
In the above description and illustrations I have set forth some of the most
convenient forms of bolts capable of being adjusted to the varying distances of the
bottom of the door from the floor, but I wish it to be understood that I do not confine
myself to any precise form or arrangement, or combination of parts, in carrying out
the objects set forth as comprising the subject of this invention. In all cases the bolt
may be elongated as desired so that it may be operated without necessitating
stooping.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
First. A bolt terminating in a pad of Idia Rubber or other suitable substance for
the purpose and with the object herein set forth and specified.
Second. Making a bolt for the purpose and substantially as herein set forth, so as to
be adjustable to any variation of distance between the door and the floor.
Dated this 18th day of December 1889.
HENRY F. TALBOT,
7, Cherry Street, Birmingham, Agent for the Applicant.
HENRY F. TALBOT,
7, Cherry Street, Birmingham, Agent for the Applicant.