Improvements relating to Door Attachments for Holding Milk Cans and the like.
Year: 1892

page_text: Date of Application, 7th Oct., 1892
Complete Specification Left, 7th July, 1893-Accepted, 12th Aug.,
1893
PROVISIONAL SPECIFICATION.
Improvements relating to Door Attachments for Holding
Milk Cans and the like.
I, WILLIAM HENRY ROBSON of 27 Ceylon Road, West Kensington in the
County of Middlesex, Inventors Model Maker, do hereby declare the nature of
this invention to be as follows:-
:―
The object of this invention is to produce a simple and reliable automatic device
for holding milk cans or the like to doors of houses or in similar or equivalent
positions as a precaution against theft or other loss.
In carrying out my invention 1 make use of a metal boss preferably of an
ornamental nature (on the outside of the door) which is provided with a suitable
recess for receiving the wire side loops generally provided upon milk cans and a
shank forming part of the boss passes through a suitable aperture in the door and
has a screw thread upon the end to admit of being secured by means of a nut and
washer inside the door.
The shank aforesaid is hollow and a bolt travels therein which is provided with
a spiral spring tending to force it home at the same time a certain amount of
torsion or turning effort is upon it. The extreme end of this bolt where it projects
within the recess in the boss is bevelled in such a way that the wire loop on the
can is readily inserted, forcing the bolt back against the pressure of the spring
before mentioned and a pin in the said bolt travels in a slot in the hollow shank.
This slot is so formed that directly the pin has travelled back a very short
distance the rotative action of the spring is no longer resisted and the bolt is
turned through a certain angle and in its course it makes a forward movement
which is stopped eventually by the pin lodging in an enlargement of the groove
after the manner of a bayonet joint.
The can cannot now be removed from the door until the bolt is withdrawn from
the inside a ball or knob being provided upon the said bolt for this purpose.
The slot may further be so formed that the bolt can be withdrawn and withheld
quite out of action if desired.
This arrangement cannot readily become disordered or picked and admits of
existing cans being used, it is readily fastened in place and may be of a very
ornamental nature the boss indeed if desired being part of the letter box frame or
other door furniture or appurtenances and the movement of the bolt may be made
to ring a bell either mechanically or electrically if desired.
Dated this 7th day of October 1892.
WILLIAM HENRY ROBSON.
COMPLETE SPECIFICATION.
Improvements relating to Door Attachments for Holding
Milk Cans and the like.
1, WILLIAM HENRY ROBSON, of 27 Ceylon Road West Kensington London W.
Inventors Model-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 :-
The object of this invention is to produce a simple and reliable automatic device
for holding milk-cans or the like, to doors of houses or in similar or equivalent
positions as a precaution against theft or other loss.

page_text: The better to describe my invention, reference is made to the accompanying
drawings, in which :-
Fig. 1 is a side elevation Fig. 2 a vertical section Fig. 3 a plan Fig. 4 a
horizontal section Fig. 5 a front view & Fig. 6 a back view.
Fig. 7 is a plan showing the development of the slot as it would appear on a
plane surface.
I make use of a metal boss A, preferably of an ornamental nature, (on the
outside of the door) which is provided with a suitable recess B, for receiving the
wire loop generally provided upon milk-cans; and a shank C forming part of
the boss A which passes through a suitable aperture in the door, and has a screw
thread upon the end to admit of its being secured by means of a nut D, & washer
inside the door.
The aforesaid shank C is hollow and a bolt E which travels therein, is provided
with a spiral spring F tending to force it home, at the same time a certain amount
of torsion or twisting effort is exerted upon it. The extreme end of the bolt E,
is bevelled in such a way, that when the wire loop on the can is inserted, a metal
ball forces the bolt back against the pressure of the spring, before mentioned; &
when the wire loop is withdrawn the ball simply rolls up the incline without moving
the bolt in
any way.
The ball also forms an extra safe-guard against tampering, as it is the only
moving part accessible from the outside, and being in no way connected with the
other parts, the apparatus cannot be unlocked by turning the ball.
In the bolt E is fixed a pin G which travels in a slot in the hollow shank.
This slot is so formed that when at rest, the pin G is at the end farthest from H
(Fig. 7). When the wire on the can is inserted the pin is forced slightly back
(toward the top in Fig. 7) & is thus released from the little groove, it is then
immediately forced by the rotative action of the spring, in the direction of the
arrow, till it comes to a stop in the enlargement of the slot at H, where it can be
moved neither forward nor backward, as in a bayonet joint. In the motion of the
pin toward H. the bolt also receives a forward movement, projecting out of the
shank, above the lower part of the loop on the can, which is thus held secure.
The can cannot now be withdrawn, for any movement tending to force the bolt
back, is at once arrested by the pin in the slot H; while the bolt cannot be turned
from the outside of the door, as there is nothing to secure a grip upon.
The bolt can be easily withdrawn from the inside of the door, by revolving the
knob provided for that purpose.
The slot may further be formed, so that the bolt can be withdrawn and with-held
quite out of action, if desired.
This arrangement cannot readily become disordered, or "picked" and admits of
existing cans being used, it readily fastened in place & may be of a very orna-
mental nature, the boss indeed if desired being part of the letter-box frame or other
door furniture or appurtenances, and the movement of the bolt may be made to
ring a bell, either mechanically or electrically, if desired.
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 :-
(1) The construction or combination of the parts forming an apparatus for door
attachments for holding milk-cans & the like, whereby an automatic locking device
is provided which can only be released from the inside of the door substantially as
described with reference to and illustrated by the accompanying drawings.
(2) The combination of the above with a boss forming or being part of a name
or other door plate or fitting, substantially as described & illustrated in the
accompanying drawings.
Dated this eth CL1002