Improvements in Gas Brackets, Pendants, and the like.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Gas Brackets, Pendants, and the like.
We, HENRY BROCKLESBY of Greame Street, Moss Side, Manchester, Manager, and
SAMUEL GRATRIX JUN. & BRO. LTD. of Alport Town, Deansgate, Manchester,
Manufacturers, do hereby declare the nature of our said invention to be as
follows:-
Our invention relates chiefly to folding gas brackets, known as the "medical," or
those used by medical and dental practitioners, which are made with a vertically
moving parallel movement to cause the horizontal swivelling arm (carrying the
burner) to be raised or lowered to different elevations, but always remain in a
horizontal position.
Our improvements consist in means for locking the parallel and vertically moving
parts of such bracket when adjusted to the desired elevation, and for that purpose we
employ a slotted (by preference) thin metal plate, and we connect such plate loosely
at each end to extensions of the parallel moving portions of the bracket arm.
Such
extensions moving radially, raise and lower the plate in a peculiar curvilinear manner,
and the slot which is formed in it partakes of an outline of corresponding curvature,
so that on passing a screw or bolt through such slot, carried by a fixed or horizontal
moving part of the bracket, and providing it with a nut, the plate may be readily
clamped, and thus serve to lock the vertically moving parts of the bracket at any
desired elevation as aforesaid.
Although more particularly applied to gas brackets, our improvements may be
applied to gas pendants, chandeliers and the like; to brackets or supports used for
oil, or electric lighting lamps-for floor, ceiling or table use, and to brackets used
with music holders, table rests or reading desks, when constructed on the principle
aforesaid of the medical gas bracket.
Improvements in Gas Brackets, Pendants, and the like.
We, HENRY BROCKLESBY of Greame Street, Moss Side, Manchester, Manager, and
SAMUEL GRATRIX, JUN., AND BRO., LTD., of Alport Town, Deansgate, Manchester,
Manufacturers, 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 :-
Our invention relates chiefly to folding gas brackets of the type known as the

page_text: medical," which are so constructed as to always keep the arm or extension which
carries the burner in a horizontal position. These gas brackets in course of time get
slack, or owing to their weight gradually fall and alter the position of the burner, and
the object of our invention is to provide simple and efficient means for locking the
bracket or of increasing its stiffness, when set to the desired height or position.
And in order that our said invention may be more readily understood and carried
into practical effect we have hereunto annexed a sheet of drawings, and will now
proceed to describe the same with the figures and letters of reference marked
thereon.
Fig. 1 is a side elevation and Fig. 2 a plan of a "medical" gas bracket with our
improvements shewn applied thereto.
(A) is the pattress, (B) the usual horizontal plug swivels, (C) the vertical plug
swivels, (D), (D) the parallel arms, and (E) the arm or extension carrying the
burner.
By moving the said arms (D) on the plugs centre (C) they can be set at varying
angles with the wall, but owing to the parallel movement of such arms and the link
piece (D) the arm (E) always remains in a horizontal position.
If the weight of the bracket overcomes the friction of the plugs (C), the said
bracket gradually falls down and srch being very objectionable and the permanent
adjustment of the bracket being very desirable and important to medical and dental
practitioners, our invention consists in providing a plate (F) linked to the parts (G)
of each plug (C), and in which plate a slot (I) is formed through which a fixed
stud (J), on the horizontally moving part of the bracket passes. This stud is screw
threaded and carries a wing nut (K). As the bracket is moved in a vertical plane
the plate, by reason of its being linked to the parts (G), also moves in a vertical plane.
and owing to the radial movement which is also combined therein, the slot (1) is of
a corresponding curvature to allow for the stud (J).
When now the bracket has been adjusted, raised or lowered, to the desired.
elevation the wing nut (K) is tightly screwed against the plate (F), and so securely.
locks it, and thus prevents the bracket changing its position.
It will be obvious that the plate may be a fixture and carried by the fixed part of
the gas bracket, and the stud be carried by an extension of the parallel arms (D), but
we prefer the plate to move.
Similarly the locking device may take other or modified forms or adaptations.
In lien of a plain slot (I) its edges may be notched for the stud (J) to move into
one or other of the notches in adjusting the bracket, in lieu of a wing nut.
Although more particularly applied to gas brackets, our improvements may be
applied to gas pendants, chandeliers and the like, to brackets or supports used for
oil, or electric lighting lamps-for floor, ceiling or table use, and to brackets used
with music holders, table rests or reading desks when constructed on the principle
aforesaid of the "medical" gas bracket.
Having thus particularly described and ascertained the nature of our said invention.
we declare that what we claim and desire to secure by Letters Patent is.
1. In gas brackets and the like with a vertical movement, the use of a plate or
yoke (F), with slot (I), in combination with fixed stud (J) and wing nut (K), or
their equivalent, mounted and operating substantially as and for the purposes here-
before described and illustrated on the accompanying drawing.
2. The plate (F) as shewn and described.
Dated this 21st dose of Da
HENRY BROCK LESBY,
SAMUEL GRATRIX, JÚN. & BROS. LTD.,
By John G. Wilson & Co.,
55 Market Street, Manchester, Agents