Improvements in Tripod Heads.
Year: 1892

page_text: Date of Application, 24th Feb., 1892
Complete Specification Left, 7th June, 1892-Accepted, 9th July, 1892
PROVISIONAL
SPECIFICATION.
Improvements in Tripod Heads.
I, WILLIAM MIDDLEMISS Alice Street Bradford Scientific Apparatus Manu-
facturer do hereby declare the nature of this invention to be as follows:-
My invention has relation to head or top of tripod usually used to support photo
cameras or other instruments.
Instead of making the tripod head in one piece I make it in two parts as
follows.
First. I make an outer circle of brass or other metal, and to this circle I attach
three or more lugs or projections, having pins or holes corresponding with similar
pins or holes at the ends of the tripod legs.
Secondly. Inside this circle I make a disc of brass or other metal, of sufficient
diameter to project over the inner edge of the outer circle. Through the centre of
this disc I make a hole for the passage of the screw or bolt, which usually secures
the tripod head to camera base.
When the camera bolt is screwed tight, the disc presses tightly against the outer
circle and prevents it turning round.
As it is necessary that the disc should not revolve I make two pins upon it,
which fit into corresponding holes in camera base.
In order to combine the disc and outer circle as a complete tripod head, I fix
three small studs on the inner edge of the outer circle, and make them project over
the outer edge of the disc.
Dated this 23rd day of February 1892.
WILLIAM MIDDLEMISS.
COMPLETE SPECIFICATION.
Improvements in Tripod Heads.
I, WILLIAM MIDDLEMISS, of Alice Street, Bradford, in the County of York,
Scientific Apparatus 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 :-
My invention relates to certain improvements in tripod heads or tops commonly
used for supporting cameras and other instruments, and has for its object, the
construction of the head or top in such a manner that, the camera or the like is firmly
held in its required position, and on easing the centre screw for holding the camera
or the like, the latter may be turned to any extent in either direction without
tightening or further loosening the centre screw.
In the accompanying drawings
Fig. 1. represents a view of the underside of a portion of the base board of a
camera or the like, with my improved tripod top or head attached thereto.
Fig. 2. is a side view of the same, and
Fig. 3. a sectional elevation through line a. b.
The base board A. is provided with a nut N. with which engages the centre
screw B. This screw passes through the disc or circular plate C. prepared with a
raised flange at its outer circumference so that, on tightening the centre screw B.
the raised flange C' grips the outer circular plate D. to which the tripod legs may
be attached by the pins E. on lugs F. or in any other convenient and well known
manner.
The centre plate C. is held so that, it cannot twist on the base board A. by two

page_text: or more pins G. engaging with corresponding holes formed in the base board and
the outer circular plate D. is kept in contact with the centre plate C. by means of
clips H.
On tightening the centre screw B. the flange C of centre plate binds against the
surface of outer circular plate D. so that, the camera cannot be twisted, but on
loosening the screw B the base board A. camera, and centre plate may be twisted
in either direction, without in any way affecting the screw, which moves along with
them, thus by these means, the base board is easily secured, and on easing the
centre screw B. may be turned without further affecting the tightening or
unscrewing of the said screw by turning the base board.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
A tripod head or top composed of two circular plates C. and D. secured or held
together by means of clips H. the whole being attached to the base board by means
of screw B. or its equivalent all arranged substantially in the manner as shown
and as herein before described.
D011
1000
JOHN WAUGH,
Agent.