Improvements in Pivot Adjustments.
Year: 1889

page_text: Date of Application, 1st Apr., 1889
Complete Specification Left, 31st Dec., 1889-Accepted, 15th Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in Pivot Adjustments.
EDWARD THORP 53 Saint John's Street Folkestone Kent, Carpenter and Joiner,
do hereby declare the nature of this invention to be as follows:-
Self sustaining and adjusting duplex Mirror Wheel (A) as shewn on plan, is a
wheel of two different sizes combined as one wheel, revolving in a cup (B), or half
circle, to receive half the wheel (A), and to correspond in thickness and size to receivo
the same.
The cup (B) extends up beyond the semicircle and is rounded, so that
when the mirror is taken out it may with ease be replaced. The wheel (A) is screwed
to the mirror frame (M), the cup is screwed to the standard (S), thus, when the
mirror is placed in position, connecting it with the two standards (S). The mirror
can then be put to any angle throughout the entire circle, and keep in such
position.
1000
COMPLETE SPECIFICATION.
Improvements in Pivot Adjustments.
I, EDWARD THORР, of 53 Saint John's Street Folkestone, in the county of Kent,
Joiner, 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 :-
My invention has for its object to provide an improved device for supporting
mirrors or looking glasses and other articles in such a manner that they may be freely
turned about a horizontal axis into any desired position and will be retained in such
position, and may be readily removed from and replaced in their frame or other
support.
The improved device is composed of two main portions one of which forms a socket
or bearing and is fixed to the rigid framework stand or support while the other forms
a pivot and is attached to the movable or swinging portion of the mirror or other
article.
In the accompanying drawing
Figure 1 is a front elevation of the socket portion of my improved device.
Figure 2 is a vertical section on the line x, x Figure 1.
Figures 3 and 4 show front and rear elevations respectively of the socket portion
of the said device.
Figure 5 is a vertical section on the line y, y Figure 4.
Figure 6 shows the two parts of my improved device fitted together ready for
use and
Figure 7 shows the said device applied to a looking glass.
Like letters indicate corresponding parts throughout the drawing.
A is the socket or bearing and B is the movable or pivot portion of my improved
device. C (Figure 6) is the frame or stand of a looking glass and D is the movable
or swinging portion thereof. The socket or bearing A may be conveniently formed
of three pieces a, b, c of wood, metal or other suitable material united by rivetting
or soldering or in any other convenient manner, or the said socket may be cast in one
piece. The part or piece a forms the back of the socket and is placed in contact
with the surface to which the socket is attached; the piece c forms the front of the
DQ17

page_text: socket, the piece b being placed between the two pieces a and c. The parts and c
are each formed with a recess or bearing as shown, the recess in the part b being
larger than that in the part e so that a groove or channel, as indicated by the
dotted line b' is formed between the parts a and c. The said recesses or bearings
are semicircular the sides extending upward. vertically or nearly so, and then
diverging from each other at the upper end so as to facilitate the insertion of the
wheels hereinafter described:
.
The pivot portion B of my improved device, as shown in detail in Figures 3, 4 and 5
is composed of a striped of wood, metal or other suitable material; by which it may be
fixed to the movable portion of the mirror or other article, and which has formed
thereon or attached thereto two concentric discs or wheels e, f preferably of the same
material as the said strip. The smaller disc or wheel is placed between the strip, d
and the larger disc or wheel e. The said discs or wheels are of such dimensions that the
disc or wheel e will enter the groove or channel between the parts a and c of the
socket A, and the said part c will fit easily between the wheels e and and when
the pivot portion B is placed in the socket portion. A, the larger wheel e will rest in
the semicircular recess or cavity in the part 6 of the socket and the smaller wheel ƒ will
rest in the recess or cavity in the part c of the said socket as shown in Figure 6. The
pivot portion B is then free to turn about the axis of the wheels.
By reason of the comparatively large surface of contact between the circumference
of the wheels and the bearing surfaces of the socket, the friction is comparatively great
and although the part B can be readily turned by hand, yet, when adjusted to any
particular position it will remain in such position when the hand is removed.
The amount of friction between the parts may be further' increased by forming the
discs or wheels and the part c of the socket of such thickness' that the lateral surfaces
thereof are brought into contact with the adjacent surfaces of the socket A and of the
movable or pivot portion B respectively.
The mode of applying the improved device is as follows viz. :-The socket A is attached
to the frame or support of the looking glass or other article by screws passed through
the holes or by other suitable means, the part a being in contact with the said frame
or support. The movable or pivot portion B is attached to the movable portion of the
looking glass or other article by screws passed through the holes g' or by other suitable
means. One of my improved devices may be used on each side of the looking glass or
other article. Or my improved device may be used on one side and any ordinary
pivot on the other side thereof.
In some cases I construct my improved device with more than two discs or wheels
arranged side by side on the same axis and alternately of large and small diameter
the socket being similarly formed with a succession of plates arranged side by sidė
with grooves or channels between them.
In other cases I construct my improved device with a socket formed of a single
piece, having a small channel or groove formed at the bottom thereof of the shape
shown in Figure 1.
The plate a of the socket A may be of the same shape as the plate b, the central and
upper portion thereof being dispensed with. Or the said socket A may be secured to
the frame or stand of the looking glass or other article by screws passed through holes
in the upper portion of the plate a in which case the part of the socket provided with
the holes g is dispensed with.
The plate A instead of being let into the standard C of the mirror may be siniply
secured to the surface thereof.
My invention is applicable to various articles besides looking glasses for example
it is advantageous for pivoted or swing fan lights, telescopes, photographic cameras
school slates and in all other cases where a pivot of a similar nature is desirable.
I wish it to be understood that I do not confine myself to any particular thickness
of material nor to any shape or pattern of the said device.
In some cases it is desirable to have one part of the device made of thicker material
than 'the other part.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I wish it understood that I
claim :-
First A device for supporting the movable or swinging portion of a looking glass
or other article in its frame or stand, comprising discs or wheels attached to the said
movable or swinging portion and fitting into corresponding recesses or bearings in a
socket attached to the said frame or stand, for the purpose above specified.
Second-The improved device constructed substantially as described with reference
to the accompanying drawing, and operating as, and for the purposes above specified.
Dated this 3rd day of December 1889.
Haseltine, Lake & Co.,
WARD THON
45, Southampton Buildings, London, Agents for the Applicant.