Year: 1894

page_text: JOHN ALFRED PRESTWICH Warmington House 744 High Road Tottenham N.
do hereby declare the nature of this invention to be as follows:-
This invention has reference to improvements in tripod stands used to support
photographic cameras, and other purposes. The object being to provide a head by
means of which the tripod can be folded into a small compass & which at the.
same time combines rigidity with lightness.
Fig. 1. shows front view of tripod folded.
Fig. 2. shows side view of same.
Fig. 3, 4, 5, show front, side & top view of tripod partially open.
Fig. 6. shows top view of tripod when open.
Fig. 7 shows screw for attaching camera or other instruments to tripod.
The centre leg is hinged directly to the plate A by hinge B. The two remaining
legs are hinged to two arms EF at CD which in turn are hinged to plate A by
the pivots G H.
When the tripod is folded as in Fig. 3, 4 & 5 the pivots of the three hinges CBD
come in a straight line, thus allowing the plate A to fold into position as shown in.
Fig. 1 & 2.
Two pins J K are provided as stops for the arms E F as shown in Fig. 6.
Each of the arms E F is provided with a projection L M Fig. 6. which when the
tripod is open & the screw inserted, partly embraces the shoulder N on the screw
which thus locks the arms in position shown in Fig. 6.
The legs should preferably be of hollow tubing, square or rectangular in section,
& can either be made to open telescopically or folded on a hinge, the section of the
leg then being U shaped.
The drawings show one joint folding on a hinge & the other opening telescopically
in the above manner.
When opening telescopically the inner end of the centre section is enlarged
while the extreme end of the next section is reduced thereby when drawn out to
the fullest extent tightens itself & becomes a firm joint & if necessary can be
fastened by an extra fastening.
Dated this 22nd day of November 1894.
J. A. PRESTWICH.
JOHN ALFRED PRESTWICH 744 High Road Tottenham London N. 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:-
This invention has reference to improvements in tripod stands used to support
photographic cameras & other purposes. The object of my invention is to provide
a folding head by means of which the tripod can be folded into a small compass
and which need not be detached from the legs of the tripod.

page_text: Fig. 3, 4 & 5 show front, side & top view of tripod partially open.
Fig. 6. shows top view of tripod when apeu.
Fig. 7. screw for attaching camera or other instrument to tripod.
The centre leg is hinged directly to the plate A by hinge B. The two remaining
legs are hinged to two arms E F at CD which in turn are hinged to the plate A
by the pivots G. H.
When the tripod is folded as in Figs. 3 4 & 5 the pivots of the three hinges C. B. D
come in a straight line thus allowing the plate A to fold into position as shown in
Fig. 1 & 2.
Two pins J. K are provided as stops for the arms E F as shown in Fig. 6.
Each of the arms EF is provided with a projection L. M. Fig. 6 which when
the tripod is open and the screw inserted partly embraces the shoulder N on the
screw which thus locks the arms in position shown in Fig. 6.
Instead of the pins J K being provided as stops for the arms E F, as shown in
Fig. 6. the projections L. M. Fig. 6 can be modified, and the plate A can have
projectious cast or otherwise fastened to it to form stops against which the
projections L. M. ou the arms E F stop against.
The screw Fig. 7 is also modified and has another shoulder which when the
screw is in position the second shoulder projects over the projections L. M. and so
binds the arms E F to plate A and makes the head firm, should there be any
slackness in the arms E F on the pivots G H.
It is obvious that in applying my invention to the various forms of folding
tripods the shape of the arms E. F, the plate A, and screw require to be modified
to suit the construction of the tripod to which it is applied.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In a folding tripod head, two arms provided with suitable hinges and pro-
jections for stops and locking arrangements, hinged on suitable pivots to a plate,
and locked by the screw that attaches the camera or instrument to the tripod, all
arranged, folding and locking substantially as described.
Dated this 21st day of August 1895