A New or Improved Butter Press.
Year: 1890

page_text: Date of Application, 25th Sept., 1890
Complete Specification Left, 22nd July, 1891-Accepted, 22nd Aug., 1891
PROVISIONAL SPECIFICATION.
A New or Improved Butter Press.
I, JOHN HOSKING PETT of Redruth, in the County of Cornwall, Engineer
do hereby declare the nature of this invention to be as follows:-
My invention relates to a new or improved butter press, and consists of a stand
carried by four legs and supporting a frame composed of two uprights surmounted
by moulded heads or caps in which are fixed the two ends of a transverse bar.
This transverse bar carries centrally a perforated and tapped block in which moves
a screw provided at the top with a handle and fixed at the bottom within the
central hollow projection of a pressure plate capable of moving in a tub secured to
the upper part of the two uprights aforesaid and furnished with a perforated bottom
plate arranged at a suitable height above the top of the stand above mentioned.
This tub is encased at its lower part between the two inclined sides of a vat resting
upon the stand and furnished midway between the perforated bottom of the tub and
its own bottom with a perforated metal plate or disc supported by an inner flange of
the said vat which is further provided with an outlet pipe. The sides of the tub
and of the vat are secured to the uprights in any convenient manner.
As my improvements are capable of some modification, without departing from
the principle thereof, I do not restrict myself to materials or dimensions, or to the
precise form or placement of the several parts thereof.
Dated this 25th day of September 1890.
RAYNER & CASSELL,
37, Chancery Lane, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
A New or Improved Butter Press.
I, JOHN HOSKING PETT, 41 Fore Street, Redruth, Cornwall, Engineer, 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 --
My invention relates to a new or improved butter press and consists of a stand
supported by four legs and carrying a frame consisting of two uprights surmounted
by moulded caps and joined by a transverse bar. Upon the horizontal top bars of
the stand is arranged a square box or tub capable of being shifted to and fro
between rebates formed in each horizontal bar and guided when in a central position
by the uprights aforesaid, this tub having a perforated bottom leading to a vat
below, supported by the under framing of the stand and furnished with a sieve
plate or disc carried by an inner flange, this vat being further provided with an
outlet pipe.
In the accompanying drawings
Fig. 1 is a vertical section of my improved butter press,
Fig. 2 an elevation at right angles thereto and
Fig. 3 a plan of the same.
My improved butter press consists of a stand preferably of wood formed of two
longitudinal bars F, connected at each end by the cross bars F' and carried by the
four legs o to which is fixed an under frame composed of the longitudinal bars f
and cross bars supporting the vat k. The latter carries upon an inner circular
flange p the sieve plate and is placed below the square tub or box i capable of
moving to and fro upon the recessed parts m of the longitudinal bars F, while being
D
1

page_text: prevented from wabling too much when in its central position by the uprights f
carried by the bars F of the stand aforesaid (Fig. 3) and connected at the top by a
transverse bar d. The tub or box i is furnished with a perforated bottom j, and
contains the pressure plate or platten e which can be moved up and down therein
by means of the screw a actuated by the handle . The lower end of the screw a
is enlarged and can turn freely within a space partly closed by the flange plate h
screwed to the central boss g of the platten e. The screw moves through a
centrally tapped bush e acting as a nut and inserted in a central perforation of the
cross bar d.
When the tub i requires to be emptied of its contents after the pressing operation
is completed, the platten e is raised clear from the same by means of the screw a
and the tub is moved away from its central position along the grooves m emptied
and refilled for another operation, when it is brought back in a central position in
which it is held with a certain amount of play by the uprights f on each side and
by the guides y above. The platten e is now lowered in the tub and on pressure
being exerted upon the contents of the latter by turning the handle b, the liquid
particles from the butter are expressed and pass through the perforated bottom j
into the vat k, from which it is discharged through the sieve plate and the outlet
pipe n, the object of the sieve plate being to prevent the loss of any particles of
solid butter escaping through the perforations of the bottom j.
g
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:-
:-
My improved butter press, arranged, constructed, and operating substantially as
herein described and shown and for the purpose set forth.
Dated this
day of
1891
RAYNER & CASSELL,
37, Chancery Lane, London, W.C., Agents for the Applicant.