Improvements in Mixers or Beaters.
Year: 1891

page_text: Date of Application, 29th Dec., 1891.
Complete Specification Left, 2nd Sept., 1892-Accepted, 15th Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Mixers or Beaters.
I, AROBINE CROSS MITCHELL of Ennis, in the County of Madison and State
of Montana, United States of America, Housekeeper, do hereby declare the nature
of this invention to be as follows:-
This invention relates to mixing and beating machines, more especially designed
to be used on the materials or batter of which cakes and the like are made.
The apparatus consists of a paddle or beater which has a reciprocating curvilinear
motion somewhat similar to that of other egg or like beaters but differing therefrom
both in construction and arrangement and a basin or receptacle which has a bottom
which is mainly of semi-circular concave form and with opposite flattened sides
internally the sides and ends of the bowl above its concave bottom being if desired
slightly extended in straight lines upward. This shape of the basin prevents the
batter from flying out of it by the rapid motion of the paddle which beats the
batter and it causes the batter to constantly settle to the bottom of the basin while
the paddle touches or nearly touches at each stroke the whole semi-circular portion
of the body or concave bottom of the basin, thus causing the batter to be evenly
beaten without any special scraping down. The paddle itself is in the form of a
plate of curvilinear form corresponding or thereabouts to the interior curvature of
the basin and has any number of apertures through it. Its length is equal or
thereabouts to the width of the basin between its opposite flattened sides so that it
reaches all across the basin and comes in contact with more of the batter at each
stroke than it otherwise would. Said paddle is made to thus sweep over and across
the semi-circular interior or bottom portion of the basin in close contiguity thereto,
in the one reciprocating half of its travel and then to move back in the other.
reciprocating half of its travel in a raised position within the basin as follows:-
Projecting upward from the paddle is a longitudinally-slotted arm connected at its
upper end above the longitudinal slot with the wrist pin of a crank that has its
bearing in one of the side uprights of the main frame while a fulcrum pin connected
with the other side upright of said frame projects through the slot of the paddle
arm so that upon rotating the crank, the paddle has the motion hereinbefore
described communicated to it. In order that the paddle may have a rapid motion
given it any suitable speeding-up mechanism is applied to the crank. Upon the
wrist-pin of the crank and upon the fulcrum pin are fixed washers or flanges
arranged to bear or lie on opposite sides of the paddle arm to guide the paddle in
its course and whereby all screws or pins to secure the paddle and its arm in place
are dispensed with. The machine may either be fastened rigidly, as by bolts or
clamps for instance, to a shelf or table or may be held in the lap of a sitting
operator which will be a great convenience to a fatigued person, and to this end one
of the side uprights of the main frame is constructed or slotted to form a handle
adapted to be held by the one hand to steady the machine by, while the other hand
is being used to rotate the crank on the other side of the frame. The two side
uprights of the main frame are independent of each other and are each provided
with a foot-piece arranged to lie the one under or over the other. The lower one
of these foot pieces is provided with longitudinal slots for passage of screw-bolts
through it which bolts engage with tapped holes in the other foot piece to hold the.
side uprights at a proper distance apart, at the same time permitting upon
slackening said bolts of said uprights being adjusted further apart for a purpose
or purposes that will be hereinafter described. The basin is held to its place
within the main frame by attached blocks or tenons on its sides arranged to pass
through slots or mortises in the uprights and the whole secured by locking pins

page_text: passing in a sliding manner through said tenons and through ears on each of the
uprights. Each of these sliding locking pins has a projecting screw or knob on it
between the ears, to form a handle to operate them by and to admit of their being
slid back or unlocked without removing them, thus making sliding bolts of the
locking pins so that they can not be misplaced or lost. When it is necessary to
remove the paddle with its attached arm, the bolts are slackened and the locking
pin or bolt is drawn back and afterward the main frame held and drawn apart
laterally until the tenon passing through the slot in the upright is slipped out of
said slot. If necessary to remove also the basin then the other locking pin or bolt
is slid back from engagement and the basin drawn toward the side upright until the
other tenon is slipped out of its slot.
Dated this 29th day of December 1891.
A. C. MITCHELL,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents..
COMPLETE SPECIFICATION.
Improvements in Mixers or Beaters.
I, AROBINE CROSS MITCHELL of Ennis, in the County of Madison, and Stato
of Montana, United States of America, Housekeeper, 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 mixing and beating machines, more especially designed
to be used on the materials or batter of which cakes and the like are made.
The invention consists in certain novel constructions and combinations of parts.
in a machine of this description, substantially as hereinafter described and more.
particularly pointed out in the claims.
Reference is to be had to the accompanying drawings, forming a part of this.
Specification, in which similar letters of reference indicate corresponding parts in all
the figures. Figure 1 represents a side elevation of the machine; Figure 2 a vertical
section thereof, on the line 2-2 in Figure 1; and Figure 3 a vertical section upon
the line 3-3 in Figure 2.
A is the basin or bowl of the machine made with a bottom mainly of semi-
circular concave form and with opposite flattened sides internally, the sides and
ends of the bowl above its concave bottom being if desired slightly extended in.
straight lines upward. This shape of the basin prevents the batter from flying.
out of it by the rapid motion of the paddle B which beats the batter and.it.
causes the batter to constantly settle to the bottom of the basin while the paddle
operating as hereinafter described touches or nearly touches at each stroke the
whole semi-circular portion of the body or concave bottom of the basin, thus..
causing the batter to be evenly beaten without any special scraping down..
The paddle B has a reciprocating, curvilinear, motion somewhat similar to that
of other egg and like beaters but it differs therefrom in its construction and.
arrangement of its connections. Thus the paddle itself is in the form of a plate
of curvilinear form, corresponding, or thereabouts, to the interior curvature of the
basin and has any number of apertures b through it. Its length is equal or
thereabouts to the width of the basin between its opposite flattened sides, so that
it reaches all across the basin and comes in contact with more of the batter at each
stroke than it otherwise would. Said paddle is made to thus sweep over and
across the semi-circular interior or bottom portion of the basin in close contiguity.
thereto in the one reciprocating half of its travel and then to move back in the
other reciprocating half of its travel in a raised position within the basin as.
follows; Projecting upward from the paddle B is a longitudinally-slotted armc
connected at its upper end above the longitudinal slot d with the wrist-pin e of a

page_text: rotating crank C that has its bearing in one of the side uprights D of a main
frame, while a fulcrum pin E connected with the other side upright D¹ of said
frame, projects through the slot d of the paddle arm so that upon rotating the
crank C the paddle B has the motion, hereinbefore described, communicated to it.
In order that the paddle B may have a rapid motion given it, any suitable
speeding-up mechanism is applied to the crank as for instance a spur wheel G
rotated by, a handle and a pinion H on the outer end of the shaft of the crank C
meshing with said wheel. The wheel G is here shown as arranged below the pinion,
but it might be arranged to mesh with the pinion from above if desired. Upon
the wrist-pin e of the crank and upon the fulcrum pin E are fixed washers or
flanges g g arranged to bear or lie on opposite sides of the paddle arm c to guide
the paddle in its course and whereby all screws or pins to secure the paddle and
its arm in place are dispensed with. The machine may either be fastened rigidly
as by bolts or clamps, for instance, to a shelf or table or may be held in the lap of
a sitting operator which will be a great convenience to a fatigued person and to this:
end the side upright D' of the main frame is constructed or slotted to form a
handle h adapted to be held by the one hand to steady the machine by, while the
other hand is being used to rotate the crank C on the other side of the frame.
The two side uprights D D' of the main frame are independent of each other and
are each provided with a foot-piece k arranged to lie the one under or over the
other. The lower one of these foot-pieces is provided with longitudinal slots i for
passage of screw-bolts through it which bolts engage with tapped holes in the
other foot piece to hold the side uprights D D' at a proper distance apart at the
same time permitting, upon slackening said bolts, of said uprights being adjusted
further apart for a purpose or purposes that will be hereinafter described.
The basin A is held to its place within the main frame by attached blocks or
tenons mm on its sides arranged to pass through slots or mortises nn in the
uprights D D¹ and the whole secured by locking pins a¹ a passing in a sliding
manner through said tenons and through ears on each of the uprights DDT.
Each of these sliding locking pins has a projecting screw or knob el on it between
the ears to form a handle to operate them by and to admit of their being slid
back or unlocked without removing them thus making sliding bolts of the locking
pins, so that they cannot be misplaced or lost. The general construction of the
machine, in fact, so far as its connections are concerned, is such that in adjusting
it and taking it apart there is not a pin or bur that need be removed or be exposed
to being misplaced or lost. When it is necessary to remove the paddle D with its
attached arm c the bolts are slackened and the locking pin or bolt a¹ is drawn
back and afterward the main frame held and drawn apart laterally until the tenon m
passing through the slot n in the upright D' is slipped out of said slot.
If neces-
sary to remove also the basin A then the other locking pin or bolt a is slid back
from engagement and the basin drawn toward the side upright D' until the
other tenon m is slipped out of its slot. This forms a very easy and simple
adjustment.
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. In mixers or beaters of the character described, the combination of the
basin A, substantially of semicircular concave form with opposite flattened sides
internally, the curved apertured plate-like paddle B arranged to extend across the
width of the basin and provided with an upper arm c having a longitudinal slot d,
the frame of the machine having opposite side uprights, the rotating crank C
carried by one of said uprights, having a wrist-pin adapted to engage with the
paddle arm above its longitudinal slot, speeding gear for driving said crank,
and a fixed fulcrum pin E connected with the other of said uprights adapted to
engage with the longitudinal slot in the paddle arm, substantially as specified.
2. In a mixer or beater, substantially as described, the main frame constructed

page_text: with opposite side uprights, the one of which is made to form a handle on its upper
end while the other carries a rotating crank, adapted. to operate the paddle of the
mixer, essentially as set forth.
3. In a mixer or beater, substantially as described, the main frame composed of
opposite side uprights having slots nn in their sides and attached foot pieces kk,
capable of being slid and adjusted one over the other to admit of varying the
distance apart of said uprights, in combination with the basin A having tenons m m
in sliding fit with the slots n n, the locking bolts a' a³, the paddle B with its longi-
tudinally slotted arm c, the fulcrum pin E connected with the one of said uprights,
aud the rotating crank C both for operation in connection with the slotted arm of the
paddle, essentially as specified.
4. In a mixer or beater, substantially as described, the combination, with the
paddle B and its slotted arm c and uprights D D', of the rotating crank C the
fulcrum pin E and the fixed washers or flanges 9 9 on said crank and fulcrum pin
upon opposite sides of the paddle arm.
Dated this 2nd day of September 1892.
A. C. MITCHELL,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.