An Improved Method of Supporting Blackboards, Paintings, or other Objects upon Easels.
Year: 1892

page_text: Date of Application, 17th Nov., 1892
Complete Specification Left, 16th Aug., 1893-Accepted, 14th Oct., 1893
PROVISIONAL SPECIFICATION.
An Improved Method of Supporting Blackboards, Paintings, or other
Objects upon Easels.
We PHILIP MAHONEY of 10 Orchard Street, Saint Augustines, Bristol, in the
County of Gloucestershire, Engineer, and AUSTIN GEORGE PALMER of
60 Richmond Street, Totterdown, Bristol, in the County of Somersetshire,
Engineer, do hereby declare the nature of this invention to be as follows:-
Our invention relates to new holders for the support of blackboards, paintings,
or other objects placed upon easels, so as to do away with the old pegs that are
now used.
We use levered cams working in suitable frames, made of metal or other suitable
material, one of each of the said levered cams and frames, are placed on the two
front legs of an easel, the blackboards or other objects when placed upon the lever
part of cams, causes the said cam parts to press tightly upon faces of easel, thereby
causing them to remain in any required position, because the said levered cams by
the weight of the above named objects are caused to rotate about an axis which
passes through the sides of aforesaid frames. To prevent the said holders from
falling to foot of easel when not in use, we use a spring which acting upon the cam
parts, causes the said holders to remain in position wherever placed.
We do not confine ourselves strictly to details, as hereinbefore set forth.
Dated this 16th day of November 1892.
PHILIP MAHONEY.
AUSTIN GEORGE PALMER.
COMPLETE SPECIFICATION.
An Improved Method of Supporting Blackboards, Paintings, or other
Objects upon Easels.
We PHILIP MAHONEY, of 10 Orchard Street, St. Augustines, Bristol, in the
County of Gloucester, Engineer, and AUSTIN GEORGE PALMER, of 60 Richmond
Street, Totterdown, Bristol, in the County of Somerset, Engineer, 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, has for its object "improvements" in supports or carriers, for
blackboards, drawings, frames, or for any object that may be placed upon or against
them, and when the pressure of such objects would cause a perfect grip, at what
ever position desired; the nature of which to be particularly described, and
ascertained in and by the following statement.
This invention, which is an adjustable self griping, support, or carrier, specially
constructed for supporting blackboards, paintings, screens, or for any object that
may be placed upon or against them, and to be attached to easels, or to any
construction to which they may be applied, where a simple and reliable adjustment
is obtained in any position where required.
The construction of the said supports, or carriers, is as follows.
To the leg of easel, frame, or any other object, we form a plate of suitable
material, that shall clip the back and both sides of said easel, frame, or any other
object, the sides of said plate extending to the front in the form of lugs, or ears,
of sufficient length, to receive the spindle of a lever, which lever is centered near
one end, which end has an advancing curve from the said centre; thus forming a

page_text: cam; the other end is carried out to receive the object to be placed upon, or
against it. The said lever is either made to fit between the beforementioned lugs,
and centered by suitable means to same, or a spindle carrying the lever, is passed
through the said lugs, or ears.
A spring is so adjusted that it shall press upon the said lever, and cause sufficient
grip, to retain the carrier wherever placed.
The action of the support, or carrier, is as follows: when the carrier is slipped
over the leg of easel, frame, bar, or other object; there being a sliding fit at the
sides, and the distance from back of clip, to face of cam, or extended curve on
lever, would be less the grip; so the act of advancing the carrier, would elevate
the lever, causing the cam to receed and giving the necessary clearance; the afore-
said spring giving a pressure sufficient to retain the said carrier where desired; the
placing of any weight upon the extended arm would cause the cam to grip the said
leg, frame, or bar; the action being such that the greater the pressure applied to
the lever, the more firm the grip.
In order that our invention may be more fully understood, we will proceed to
illustrate the same, by the accompanying drawings.
Figure 1, is a side elevation of carrier. A, is the body. B, is a sliding plate,
that receives the pressure of cam. C, is a slot to allow said plate to slide for
adjustment. D, is the lug or ear carrying spindle. E, is the spindle. F, is the
lever or arm. G, is the cam or advancing curve; and shewing the lever at grip.
H, is the leg, frame, or bar, passing through the said carrier.
Figure 2; is a plan of carrier, and shewing the angle of leg, as applied to an
easel.
Figure 3; is a front elevation of carrier, shewing the spring i, for an automatic
grip.
Having now particularly described and ascertained the nature of our invention,
by the foregoing statement, and accompanying drawings; we declare that what we
claim is.
The principles herein described, with reference to an adjustable, support, or
carrier, having a levered cam, as a means of support, substantially, as herein set
forth and described.
Dated this 15th day of August 1893.
CHARLES MILED,
Agent for Applicants.