Improved Automatic Lock or Spring Catch for Folding Camera Tripod Stands.
Year: 1892

page_text: Date of Application, 19th Feb., 1892
Complete Specification Left, 16th Nov., 1892-Accepted, 17th Dec., 1892
PROVISIONAL SPECIFICATION..
Improved Automatic Lock or Spring Catch for Folding Camera
Tripod Stands.
I, ALEXANDER BIRNIE, of 118 Perth Road, Dundee, in the County of
Forfar, N.B., Photographic Apparatus Maker, do hereby declare the nature of this
invention to be as follows:-
This invention relates to folding tripod stands for cameras, its object being to
retain the parts of each leg securely and firmly in position when unfolded for use,
and also to allow of the said legs being readily folded up when desired.
In carrying out my invention, I employ an automatic lock or spring catch, con-
sisting essentially of a cross bar in combination with or part of a bent spring of
suitable design, the whole being fixed to one section of the leg of the tripod stand.
On the other and adjacent section of the leg fixed a cross bar with a recess for
receiving the releasing knob of the spring when the two parts of the leg are
unfolded-that is to say placed in line-the remainder of the spring when it has
passed the recess springing out and catching the said cross bar.
Dated this 18th day of February 1892.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.
COMPLETE SPECIFICATION.
Improved Automatic Lock or Spring Catch for Folding Camera
Tripod Stands.
I, ALEXANDER BIRNIE, of 118 Perth Road, Dundee, in the County of
Forfar, N.B., Photographic Apparatus Maker, 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 relates to folding tripod stands for cameras, its objects being to
retain the parts of each leg securely and firmly in position when unfolded for use,
and also to allow of the said legs being readily folded up when desired.
The accompanying drawings illustrate the method of carrying out my invention.
Figures 1. and 2. represent respectively a front and a side elevation of a folding
leg, as fitted with my improved catches,
Figure 3, a front view on an enlarged scale of the catch at C. (Figure 1.),
Figure 4, a section at A. A. (Figures 3. and 5.),
Figure 5, a section at B. B. and
Figure 6, a view shewing the catch at C. unlocked.
It will be understood that the catch at D. is similar to that at C.
In these drawings the same reference numerals are used to mark the same or like
parts wherever they are repeated.
In carrying out my invention, I employ an automatic lock or spring catch 7,
consisting essentially of a cross bar 8. in combination with, or part of a bent
spring 9. of suitable design, the whole being fixed to one section 10. of the leg of
the tripod stand. On the other and adjacent section 11. of the leg is fixed a
cross bar 12. with a recess 13. for receiving the releasing knob 14. of the spring
when the two parts of the leg are unfolded-that is to say placed in line-the
remainder of the spring when it has passed the recess B. springing out and catching
the said crossbar 12.

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 declare that what I
claim is :-
In folding camera tripod stands, the construction, combination and arrangement
of parts, substantially as hereinbefore described and shewn in the accompanying
drawings.
Dated this 14th day of November 1899
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.