US717929A - Dough-mixer. - Google Patents

Description

R. ROBINSON. DOUGH MIXER.

PATENTED JAN; 6, 1903.

APPLICATION FILED JUNE 19, 1902.

N0 MODEL.

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llNiTED STATES PATENT OFFICE.

RICHARD ROBINSON, OF MOBILE, ALABAMA.

DOUGH-MIXER.

SPECIFICATION forming part of Letters Patent No. 717,929, dated January 6, 190

Application filed June 19, 1902.

To all whom it'may concern.-

Be it kn own that I, RICHARD RoBINsornresiding at Mobile, in the county of Mobile and State of Alabama, have invented certain new and useful Improvements in Dough-Mixers, of which the following is a specification.

My present invention relates to improvements in the type of dough-mixer disclosed,

in my Patent No. 636,559, dated November 7, 1899, and which seeks to provide certain modifications and changes in the structural combination of parts set out in the said patent referred to whereby the cost of manufacturing will be materially decreased, the eificiency of the mixer increased, its operation simplified and rendered more convenient, and whereby the several parts can be the more readily assembled for use or separated for cleansing.

In its generic nature my present invention consists in a novel correlative arrangement of the paddles or whirl-frames and operating means therefor; and in its more subordinate nature it consists in certain details of construction and peculiar combination of parts hereinafter described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a vertical section of a doughmixer embodying my invention. Fig. 2 is a top plan view thereof. Fig. 3 is a side view illustrating the general arrangement of the paddles or whirl-frames and the drive-gear therefor, the lower or direct-driven paddle or whirl-frame being shown detached from its driving-spindle. Fig. "4 is a detail view of the bridge or supporting-frame. Fig. 5 is a detail view of the bridge-clamping device hereinafter referred to.

In my present construction of dough-mixer the pan 1 may be of any approved form, preferably that shown in the drawings, and provided with a socket in its bottom to form a stepped bearing 1 for the lower end of the operating shaft or spindle 3, the upper end of which is supported in the arch 4 of a bridge-bar 4, in practice of a length sufliicient to extend over a large-sized pan,and to provide for securely and detachably holding the said bridge-bar on the pan edge I use a clamp member for each end of the bridge-bar, the construction of which is best shown in Fig. 5, from which it will be noticed the same comprises a curved clamping portion 5*, adapted to project under the bead or edge l of the pan, and an outwardly and upwardly extendin}; finger 5 at each end, which fingers terminate in head portions 5, that project toward each other and in a parallel plane with the curved portion 5*. Each head portion is provided with a threaded aperture to receive a clamp-screw 5 and the said screws are arranged to engage the ends of the bridge-bar 4, as clearly shown in the drawings. By providing clamp devices of the character stated the same can be conveniently made fast to a pan edge and to secure the bridge ends and readily permit of the removal of the bridge-bar, the construction of said clamps being such that they can be readily used on difierent sizes of pans.-

One end of the bridge-bar 4 carries on its upper face bearin gs 4 4 to receive the crankshaft 8, the outer end of which carries acrankhandle 8 and its inner end a removably-held pinion 9, adapted to mesh with the pinion 10, made fast to the drive-shaft 3, and a pinion 11 on a hub 11, loosely rotatable on the shaft 3 in the direction of the motion imparted to the shaft 3 by the pinion 9, and the said pinion and hub 11 and 11 are supported in a supplemental bearing 12, pendent from the bridge 4, to which it is firmly secured, and the said bearing 12 includes a hinged cap portion 12, whereby by properly adjusting the cap the shaft 3 can be removed or applied for use as desired, provision being also provided thereby for sustaining the hub 11*, that carries the pinion 11.

In my present invention instead of providing an inner and an outer whirling frame, as in my patent referred to, I use an upper and a lower whirling frame. The upper frame comprises a hub 13, loosely mounted on the shaft 3, and a series of radially-projecting paddles 13 which taper from the hub to the tip end. The lower whirl-frame comprises a hub 14 and a series of radial paddles 14:, and the said frame carries a clamp-screw let for holding said hub fast on the lower end of the shaft 3 to terminate therewith. The upper whirl-frame hub 13 has a pair of diametric oppositely-projecting screw-studs 13", each of which has a clamping-shoulder 13, and the hub 11, having the pinion 11, has

similar studs 11", having shoulders 11 and the two hubs 11 and 14 are connected by the flexible members, preferably spring-wires 16 16, the upper ends of which are clamped against the hub 11 by the shoulders 11 of the studs, and the lower ends are made fast to the hub 13 by the shoulder-studs 13 and to cause the two hubs 13 and 11 to turn in the same direction, and yet give the upper whirl-frame a limited movement both vertical and rotatable independent of the hub 11 the wires 16 are crossed, as shown, and by reason of the flexibility of the said connection sudden jars on the upper whirl-frame by quick movement of the hub 11 in either direction and the danger of breaking the paddies of said upper whirl-frame are thereby overcome. Furthermore, said flexible connection also allows for a limited vertical motion to the upper Whirl-frame relatively to the lower'whirl-frame, which travels in the fixed horizontal plane.

From the foregoing description, taken in connection with the accompanying drawings, it is thought that the advantages and manner of operation of my invention will be readily understood. By turning the operating-handle the gear mechanism will impart a direct motion to the shaft 3 in one direction and the reverse motion to the hub 11 and the upper whirl-frame will be rotated in an opposite direction to the rotation of the lower whirl-frame, which rotates with the shaft 3, and by reason of the peculiar connection of the upper whirling frame with its driving power a sufficient flexibility between the two is always maintained to prevent sudden jar on the paddles.

The several parts can be quickly assembled or separated, their correlative arrangement being such that any ordinary kitchen help can put them together for use.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

l. A dough-mixer, comprising a supporting-frame adapted to be detachably held on the rim of a pan, a vertically-mounted operating-shaft, and driver means therefor cooperatively mounted on the supporting-frame, said driver means including a hub loosely mounted on the operating-shaft and rotatable in a direction reverse t0 the movement of said shaft, a lower whirl-frame mounted on the operating-shaft to turn therewith,a second whirl-frame loosely mounted on the operating-shaft, and flexible connections joining the loosely mounted whirl frame and the loosely-mounted hub, all being arranged substantially as shown and described.

2. In a mixer as described, a supportingframe for sustaining the mixing devices in a pan, a vertically-mounted rotary shaft, a whirl-frame rotatable therewith, a second whirl-frame for loose vertical and rotatable action on the shaft, a driving means including a direct gear connection with the operatingshaft, and an indirect gear connection for the loosely-mounted whirl-frame, substantially as shown and for the purposes described.

3. In a mixing utensil of the character described, the combination with the supporting-frame including the pendent portion having a detachable cap-plate, the main shaft 3, the crank-shaft, beveled gearing joining the two shafts, and the lower whirl -frame fixdly held on the shaft 3; of an upper whirlframe loosely mounted on the shaft 3 for vertical and rotary motion, the hub 11- loosely mounted on the shaft 3, and supported in the pendent portion of the supporting-frame, the crossed wire connections 16 that join the hub 11 and the upper Whirl-frame, and a bevel-gear connection for joining the hub 11 with the crank-shaft, substantially as shown and described.

4. In an appliance as described, the combination with the shaft 3, having a bevelpinon, the crank-shaft, the latter having a bevel-pinion held to mesh with the pinion on shaft 3, the hub 11 having a pinion 11 for meshing with the crank-shaft pinion, a lower whirl-frame detachably fitted on the shaft 3 to turn therewith, an upper whirl-frame loosely mounted on the shaft 3 and vertically movable thereon, and the crossed springwires 16 connected at one end to the hub 11", and at the other to the hub of the upper whirl-frame, all being arranged substantially as shown and for the purposes described.

RICHARD ROBINSON. Witnesses:

WM. EVANS, SEYMOUR DUKE.

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