Year: 1888

page_text: Date of Application, 30th June, 1858
Complete Specification Left, 22nd Mar., 1889
Complete Specification Accepted, 27th Apr., 1889
I WILLIAM MAVITTA Rule Manufacturer, trading as W. H. Brown & Co., 10
Fisher Street Birmingham residing at Unity Cottage Heathfield Road Birchfield
Birmingham do hereby declare tho nature of this invention to be as follows:-
--
The Stand is composed of 3 Portions, one part folding with nick & spring joint, &
the other sliding, the combination when closed, being perfectly square, & solid, and
practically indestructible by ordinary fair usage-the material to be either of wood,
metal, or other substance, or combinations thereof and the dimensions immaterial.
The Head is different in form from most other arrangements of the kind, the legs
being connected inside the ears of the Head, instead of outside, and the traversing
set screw or pin & bolt render the attachment so rigid, and perfect, that only by a
breakage can the legs become detached.

page_text: I WILLIAM MAVITTA, residing at 3 Havelock Road, Birchfield Birmingham in the
County of Warwick Manager do heroby declare the nature of any said 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 a portable tripod stand and head which pack into
very small space the legs themselves though each in three parts are folded and
slided together in such a manner as to become almost a solid block when closed, and
all three forming together with the hoad a very compact arrangement.
The logs are united to the heads by an inside arrangement which keeps them up to
their work without shake or vibration in a manner hereafter to be very minutely
*plained.
The combination of parts produce a most reliable stand which is capable of
adjustmentation in height from a stool up to quite a lengthy tripod.
Of course these stands may be used for a great variety of purposes but are
specially suitable for photographic and other similar apparatus.
In order that my invention may be clearly understood and more easily carried
into practico I have appended hereunto two double sized sheets of drawings upon
which I have illustrated several general views of my improvements together with
various enlarged details of the parts incidental thereto.
Figuro is a general view of the portable tripod stand fixed in position
complete.
Figure 2 is a plan of the head B.
Figuro 3 is a similar plan showing a slight modification.
Figure 4 is a viow of one of the legs A when closed.
Figure 5 is an onlargod front elevation of the attachment between the logs A and
hend B.
Figure 6 is a similar elevation to Figure 5 but showing a slight modification.
Figure 7 is a front elevation of one of the legs A shewn partly open.
Figure 7 is a front elevation of the sliding joint in the leg A.
Figure 7B is a front elevation of the hinged joint in the leg A.
Figure 8 is a side elevation of Figure 7.
Figure 84 is a side elevation of Figure 74.
Figure 8 is a side elovation of Figure 7.

page_text: Figure 11 is a section through Figure 7ª on line 1—2.
Figure 12 is a front elevation of the joint D when the leg is opened out at full
length.
Figure 13 is a side elevation of Figure 12.
Figure 14 is a section through Figure 12 on line 3-4.
Figure 15 is an enlarged plan of the head B one leg A¹ being shewn attached.
Figure 16 is a similar plan of a modified arrangement of head one leg also being
shewn attached.
By my invention the three jointed legs A are attached to the head B by means of
the traversing set screws F shewn by Figures 5, 7, 9, 10 and 15, these being attached
upon the pivot fi to the forked heads A¹ of the legs A in such a manner as to allow
of them being turned from between the fork of the head for the purpose of allowing
the forked ends A¹ to be compressed together sufficiently to pass over the pins
formed inside the ears B¹ of the heads B which pins 6 enter the holes a³ which are
formed in the fork ends A¹ to receive them the traversing set screws F are then turned
back on the pivot funtill stopped by the pin being then between the ends of the fork
and the small sliding bolt which is mounted in the socket 6 attached to the head B.
The traversing screw F which has its screw entering the socket f is then unscrewed
until it is extended sufficiently to fix the ends A' of the fork of the leg A against the
cars B¹ of the head B and retains the pins & in the holes as thereby forming a pivot
upon which the legs can be more or less opened or closed with regard to each other
as may be desired in accordance with the height at which the head B is required from
the ground. This arrangement forms an attachment between the head and legs
which is so rigid and perfect that only by breakage can the legs become detached
while the greatest freedom of movement in the legs is retained. The legs A are
formed in three pieces so as to allow of being collapsed as shewn by Figure 4 the
top part consisting of the pieces A¹ Figures 7 and 8 between which the middle
portion A of the leg is made to slide. This middle portion consists of two pieces A³
and is provided at the top with the cross plates g¹ Figure 11 at each side having
the projections g² which slide in the grooves at formed in the pieces A¹ the plates gi
being bolted to the centre pieces A³ by the pin g³ a piece of cork india rubber or
other soft substance H being placed in the centre between the pieces A³ to allow the
plates g¹ to be screwed together by the thumb screw g so as to tightly clutch the
pieces A at any point and thus the leg can be lengthened or shortened at will or
the centre portion A can be slided entirely within the top portion A¹ of the leg,
at the bottom of the centre portion of the leg between the pieces A³ the lower
portion A of the leg is hinged by the pin a so as to fold between the said
pieces A³ the top being provided with the spike a' so that when this portion of the
leg is closed the remainder can be used when required as a shorter leg but when this
is fully opened it is screwed in position by a nick and the thumb spring a³. The
whole combination forms a practically indistructable collapsing leg which when open
is free from shake and thoroughly firm, and when closed the plates g¹ hold the top
ends of the pieces A' firmly together, the lower ends being bound by the cap 9 while
the centre pieces are secured together by the plates 9' and as each particular part
of the leg fits squarely in the other the whole when closed is perfectly square and
compact. I do not confine myself to the exact sizes or details as for instance I may
form the head B as shewn in Figure 16 i.e. without the use of the sliding bolt
in which case the attachment would be made as shewn in Figure 6 which in all other
respects is similar to the one before described but by this means I am enabled to
slide the centre part A² any distance up between the pieces A' while attached to the
head thereby obtaining the opportunity of greater variety in the various lengths of
leg obtained & much more portable for carrying when erected.
To prevent any bind from swelling in the sliding portion I provide chafing plates
within the cap g
I may also place the pins & upon the sides of the forked head A' instead of upon
the ears B' of the head B and provide corresponding holes in the ears B¹ to receive
them.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
First. The portablo tripod stand and head substantially as heroin sot forth and
shown upon the drawings.
Second. In the portable tripod stand and hond the means for expan-ling and securing
the forked head A of the legs A between the cars B' of the head B substantially as
herein set forth and shewn by Figures 5. 7. 8 9. 10. & 16.
Third. In portable tripod stands & head the moans for expanding and securing
the fork head A' of the legs A between the ears B' of the head B substantially as
herein setforth & shown by Figures 6, 7, 8, 9, 10, & 16.
Fourth. In the portable tripod stand the combined sliding and folding collapsible
legs A substantially as herein set forth and shown by Figuros 4. 7. 8 11. 12. 13.
Fifth. The portable head having the ears B' forming jaws with pins or holes for
internally receiving the heads of the legs substantially as herein set forth & shewn
upon the drawings.