Improvement in the Method of Locking together the Several Parts of Picnic Knives.
Year: 1896

page_text: Date of Application, 10th Dec., 1896
Complete Specification Left, 15th June, 1897-Accepted, 10th Dec., 1897
PROVISIONAL SPECIFICATION.
Improvement in the Method of Locking together the Several Parts of
Picnic Knives.
Manufacturer. and
also in Sheffield do
EDMUND PRIESTMAN Pond Hill Sheffield Cutlery
FREDERICK THORNHILL of Sheaf Island Works Pond Hill
hereby declare the nature of this invention to be as follows:-
Of the sides that come together one is made with two holes in it C.C. Fig I,
the other side having four slits cut in it so that part can be pressed outwards DD
Figs 2 & 3, & the spring of the frame bearing the holes CC having a lip A Fig I.
In order to fasten the two frames 1 & 2 together, half open the impliment E
that works upon the spring B Fig I so that the lip A is clear of the hole C, then
place Fig I upon Fig II so that the raised flanges D D fit into holes C. C., slide
Fig. II down the slots as far as it will go, so that the upper raised part D shall
be opposite lip A, when, by opening or closing impliment E the lip A will slip
under flange D, locking both together.
The same result is attained if the lip is upon impliment Einstead of upon
spring B, but in this case they are only locked together when impliment is shut.
Projections D D may be made in other ways than by pressing them out of the
plate Fig II & III.
Figures I & II represent separate impliments say a fork & a knife & when
locked together fig. I lies on the top of fig II Fig I is shewn with the outer side
(which would be a plain sheet of metal or other suitable substance) lifted so off
as to show construction.
Dated this 18th day of January 1897
EDMUND PRIESTMAN
F. THORNHILL.
COMPLETE SPECIFICATION.
Improvements in the Method of Locking together the Several Parts of
Picnic Knives.
We EDMUND PRIESTMAN Pond Hill Sheffield Cutlery Manufacturer. and
FREDERICK THORNHILL of Sheaf Island Works Pond Hill, also in Sheffield, Cutler.
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 follow-
ing statement:-
This invention relates to a method of dispensing with studs or rivets and to
novel means for securing together the two principal parts of pic-nic knives,

page_text: and is accomplished in manner following, reference being made to drawings
annexed hereto. Wherein Fig 1, represents one of the sides or inner scales of
our improved form, the outer scale being removed to show position of blade and
spring.
Fig. 2 represents the inner scale of the corresponding side of knife-Fig 3,
is an edge view of the same showing the raised locking portions-Fig 4 illustrates
an alternative arrangement for locking the parts.
The scale Fig 1 has the holes C. C. punched clean through of the shape shown,
The spring B, is fitted in the usual position but it is provided with a projecting
piece or pin A, for the purpose hereinafter referred to; Both the knife and the
fork blades are practically of the usual construction. The second scale Fig 2
instead of having pieces punched clean out of it thereby leaving holes as in C. C.
Fig 1, is only slitted along the sides as per D. D, leaving the metal intact at
each end, so that by a continuation of the operation or by separate pressing the
said two pieces D. D, are made to project beyond the side of the scale as shown
in Fig 3, thereby operating both as guides and means for locking parts when it
is desired to close up the knife.
In order to fasten or lock together the two frames or parts constituting a pic-
nic knife, the two scales Figs 1 and 2, are placed together the implement E,
being half open thereby pressing back the spring B, and consequently withdraw-
ing the pin A on the said spring clear of the slot C, the parts D, D Fig 2
will pass through the openings C, C, and the scale Fig 2 will now slide endways
until the central part or raised flange of D, comes nearly opposite to the pin A
whereupon on fully closing or opening the implement E the pin A will engage
the raised flange D securely locking the two parts of the knife together. To
again separate them, it is only necessary to half open the implement E where-
upon the part D is released.
The action may be obtained by working the pin A direct upon and By the im-
plement E leaving the spring B of the usual form, as illustrated by Fig 4, when-
ever implement is closed the parts will be locked together, and whenever E is
opened they may be slidden along and separated.
We would have it understood that we do not limit ourselves in the production
of the several parts to the specific processes herein referred to as the same results
may be obtained by various other means.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare what
we claim is:
The method and formation out of the solid metal of knife scales by raising guide
and flange pieces together with the addition of a lip or pin part upon either the
spring or upon one of the implements in a knife operating to lock and secure
together the parts constituting a "pic-nic" knife substantially as described and
illustrated.
ISAAC BECK, F.S.P.A.
Agent for the Applicant. Haymarket Chambers, 17 Haymarket Sheffield.