Improvements in Dentists' Bracket Stand.
Year: 1888

page_text: Date of Application, 7th Aug., 1888
Complete Specification Loft 30th An
1000 Accented
Dondu
2000
PROVISIONAL SPECIFICATION.
Improvements in Dentists' Bracket Stand.
WILLIAM BOOTH PEARSALL Dentist 13 Upper Merrion Street Dublin ARTHUR
JOSEPH WATTS Dentist 32 St. Albans Road South Circular Road Dublin do hereby
declare the nature of this invention to be as follows :-
An iron tripod stand A from centre of which is fixed an upright metal bar B.
On upper part of bar B are cut fifteen or more angular notches (forming a rack.
The bracket arm D is made of metal and is attached to upright bar B by a hole bored
in it to fit bar B. This arin D is held in position by a spring and lever catch E one
end of which fits into angular notches Con upright metal bar B. The spring lever
catch E can be liberated and the bracket arm D adjusted at pleasure by the use of
one hand.
Dated this 4th day of Aurust 7400
COMPLETE SPECIFICATION.
Improvements in Dentists' Bracket Stand.
We WILLIAM BOOTH PEARSALL of 13 Upper Merrion Street, Dublin, Ireland,
Dentist, and ARTHUR JOSEPH WATTS of 32 St. Albans Road, South Circular Road,
Dublin, Ireland, Dentist, 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 has reference to an improved adjustable apparatus of simple,
economical, and efficient construction for use as a Dentists bracket stand, or reading
adjustable desk.
The nature, construction, and mode of adjusting the apparatus is illustrated in
accompanying drawing which represents in elevation the bracket stand complete.
From an ordinary metal tripod stand A rises the vertical bar or standard B on
which a number of circumferential shoulders or grooves as shown are formed so as
to constitute a rack. On this vertical bar, or standard slides a collar D, carrying an
arm e, on which is mounted a slab or shelf f for holding glasses, instruments, or
other articles required in dental operations-In the side of the collar D are formed
cheeks g. in which oscillates the lever or trigger h, one end of which, through the
intervention of the spring i, gears with the circumferential shoulders or grooves, and
the other end acts as a handle.
The action of the apparatus is obvious on pressing the lever or trigger h, the
collar D, is free to slide on the vertical rod or standard B, and when the slab or
shelff is brought to the desired height, the lever or trigger is allowed to fall into
one or other of the circumferential shoulders or grooves, and thus holds the slab or
shelf in the required position. It is also obvious that the slab or shelf is not only
capable of being adjusted to any height required, but can be readily turned round in
a horizontal plane without disturbing any part of the mechanism. This arrangement
can obviously be also applied with equal advantages to Easels, Reading desks, aad
other such like articles.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to he performed we declare that what
we claim is.
"
1st. In bracket stands as used by dentists the standard B provided with circum-
ferential shoulders or grooves in combination with the sliding collar D, carrying an

page_text: arm e, and a lever or trigger h, all arranged and operating substantially in the
manner herein specified.
2nd. The use and application for the purpose or purposes herein mentioned of
apparatus constructed and operating substantially in the manner described and set
forth.
11
0211 1
C
11000
J. K. FAHIE & SON,
9, Westland Row, Dublin, Agents for Applicants.