SELF ACTING BOLT FOR BOOK CASES, WARDROBES CABINETS & OTHER ARTICLES HAVING DOUBLE DOORS
Year: 1885

page_text: I, FREDERIC HOWARD COLLINS 26 Cumberland Str Birmingham County of
Warwick Brassfounder do hereby declare the nature of my invention for SELF
ACTING BOLT FOR BOOK CASES, WARDROBES CABINETS & OTHER ARTICLES
HAVING DOUBLE DOORS to be as follows:-
I take a small frame suitable for letting in horizontally on the inside edge of
the top or bottom or both of the left hand door the angle of the frame contains a
borizontal Bolt pressed inwards by a spring & having in its centre a round recess
opening towards the back On the head or sill or both is fixed a plate having a
projecting stud When the left hand door is being closed the stud passes through
an opening in the frame forcing the bolt outwards till the door is closed when it
slips into the round recess and is secured by the spring drawing in the bolt
When the right hand door is closed the the bolt cannot move outwards as it is
prevented by the frame of the door.
Self Acting Bolt for Bookcases and the like.
I, FREDERIC HOWARD COLLINS 26 Cumberland Str Birmingham Brassfounder
do hereby declare the nature of my invention for SECURING THE ONE SIDE OF A
O PAIR OF DOUBLE DOORS and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
I take a small Frame suitable for letting in horizontally on the inside edge of the
top or bottom or both of (say) the left hand door the angle of the frame contains a

page_text: horizontal bolt pressed inwards by a spring and having in its centre a recess
opening towards the back opposite to which opening there is fixed on the Head or
Sill or both a plate having a projecting Stud capable of. filling the recess in the bolt.
When the said left hand door is being closed the stud passes through an opening
in the frame & forces the bolt outwards till the door is nearly closed when it
comes opposite the recess in the bolt & allows the spring to draw in the bolt
& clip the Stud The right hand door being now closed the edge of the door
touches the end of the Bolt & so prevents any outward movement thereof The
left hand door is therefore securely fastened by the recess in the Bolt embracing
the stud.
While the bolt is ordinarily fixed. on the left hand door it may be fixed on the
right hand door if so desired, or in any other position on one of a pair of double
doors to accomplish the same result.
A large size Bolt on the same principle can be applied to French Casements or
folding doors between apartments.
Drawing No. 1 shows a pair of doors both of which are open, also enlarged
views of selfacting bolt only in Plan at No. 4 and in Elevation with front plate
removed at No. 5.
Drawing No. 2 shows the left hand door being closed & the bolt "A" pressed
out by the stud "B."
Drawing No. 3 shows the left hand door closed the stud "B" being embraced by
the recess in bolt "A" which is prevented moving away from it by the edge of
the right hand door which is now also closed.
In all the Drawings "a" is the frame; "A" the Bolt: "b" the plate; "B" the
Stud "c" the edge of opposite door.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the saine is to be performed I declare that what
I claim is
1st: A sliding bolt engaging with a stud but free to move outwards & release
said stud when the opposite door to that on which it is fixed is open but prevented
from such outward movement when the opposite door is closed.
2nd. The application of such sliding Bolt to Bookcases, Cabinets, Cupboards,
French Casements, Folding doors and all other articles in which there are two
doors closing together or their equivalent.
101 1
1000