US1600249A - Bearing for centrifugal extractors - Google Patents

Description

J. B. SANDO BEARING FOR CENTRIFUGAL YEXT-RACTORS Sept. 21 ,1926.

Filed 11. 1920 2 Sheets-Sheet 2 A A'- i ulh Lu... -\-uv-lv( Patented Sept. 21, 1926.

UNITED STATES PATENT OFFICE.

JOSEPH B. SANDO, OF CINCINNATI, OHIO, ASSIGNOR TO THE AMERICAN LAUNDRY MACHINERY COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

BEARING FOR CENTRIFUGAL EXTRACTORS.

Application filed December 11, 1920. Serial No. 429,975.

This invention relates to improvements in centrifugal extractors.

The objects of this invention are to provide means for limiting the oscillation of the rotating basket of the extractor; to provide automatic means for cutting out the motor should the amplitude of oscillation of the basket exceed a predetermined amount; and

furthermore to provide dynamic braking means for slowing down and stopping the motor upon being automatically cut out by excessive oscillation of the basket.

Another object of this invention is to provide means for automatically lubricating the spindle upon which the basket is mounted, the feeding of the lubricant being caused by the rotary motion of the spindle.

Other objects of this invention will be apparent from the following description and claims when considered in connection with the accompanying drawings.

Fig. l is a view of my invention partly in elevation and partly in section through the plane of line 1-l of Fig. 3; Fig. 2 is a diagram of the electrical wiring; Fig. 3 is a horizontal section through the plane of line 3-3 of Fig. 1; Fig. 4 is a horizontal section through the plane'of line 4-4 of Figs. 1 and 5; Fig. 5 is a vertical section showing in detail the bearing and other parts; and Fig. 6 is a section through the housing which ineloses the safety switch.

The curb 1 is supported within the uprights 2 which in turn support at the top thereof the gimbal ring 3 upon which is rockably mounted the electric motor 4 for operation of the spindle 5 through the motor shaft 4 and the coupling 7 between the shaft and spindle. As will be understood, the motor is adapted to rock upon ring 3 in a plane at 90 to the plane in which rocks the ring 3. Upon the lower end of the spindie 5 is mounted the basket 6 which rotates within the curb 1 and carries the materials 'to be dried. The lower end of the spindle 5 is provided with a bearing 5, the sleeve 8 and bushing 9 surrounding the lower end of the spindle within the bearing 5. Thrust buttons 10 are provided at the lower end of the spindle and a disk 11 having a recess portion 12 upon its upper face is fixedly secured in any suitable manner, as by bolting, to the bottom of the bearing 5*.

Sleeve 8 is formed with an inwardly extending flange at its lower end against which bears the lower end of the spindle 5. The flanged end of sleeve 8 is provided with a diamond shaped aperture, as shown, to receive the correspondingly shaped portion formed on the upper thrust button, thereby forming a lock. The same lock engagement is provided at 7" between the lower thrust button and'the inwardly extending flange on the lower end of the bearing 7. The bearing 5'" is adapted to oscillate within the limits of the concave plate 13 which is fixedly secured in any suitable manner, as for instance by bolting across the bottom of the curb 1. An oil reservoir 14 is formed in the bearing 5 and has communication through the ports 15 with the recess 12 so that oil can feed up through the thrust buttons 10 and thence between the sleeve 8 and bushing 9, the oil which reaches the upper end of the sleeve 8 and bushing 9 finding its way into the annular cup 16 which is formed in the upper portion of the bearing 5*. The feeding of oil in the manner just described is caused by the rotary motion of the spindle in its bearings. The oil received by the cup 16 will return through pipe 16 to the reservoir 14. A funnel valve 14 is provided for filling the reservoir 14.

The bearing 5 is also formed with sockets 17 for cooperation with ball members 18 which are carried upon the inner ends of the bolts 19. Upon the outer threaded ends of bolts 19 are mounted the adjusting nuts 20 which form an abutment for the outer ends of the large and small springs 21 and 22, respectively, the inner ends of which springs abut in each case against the end wall of the spring housing 23. The spring housings 23 are mounted in any suitable manner upon the curb 1 and are provided with caps 24 to close the outer ends of the same. The spring housings and the caps therefor are in the present instance shown as being bolted to the curb by bolts 25. The caps 24 are centrally apertured at 26. Lock nuts 27 are provided for the adjusting nuts 20.

As will be seen from Figs. 3 and 6 there is mounted in the outer end of one oi the bolts 19 a. switch screw 28 which carries at its outer end the plug member 29 for co-oporation with the safety switch indicated at 30. The switch screw 28 has-screw thread engagement with the bolt 19 and has a lock nut 31. The switch screw 28 extends out through the opening 26 in the cap 2t and a housing 32 is provided upon the head of the cap Zl for convenient mounting and connection of the safety switch and the electric connections thereto as indicated at 33 and 3t.

From the above description it will be seen that the springs :21 and 22 can be set so as to limit the oscillation of the spindle by adjusting nuts 20 to approximately correspond to the amount of over-balance of the load in the basket. Such oscillation will in the present machine be ordinarily taken up by r the springs, the condition of a given set of springs at a given moment, with respect to compression, depending upon the direction of oscillation of the basket, as will be readily understood. Should, however, the oscillation of the basket exceed that for which the springs, have been set, there will be caused an actuation ofthe safety switch through the outward movement of the plug member 29 into contact with the switch 30.

i The closing of the circuit at this point, as

will be seen later, causes the cutting out of the motor 4 and a dynamic braking of the same so as to stop the machine.

Referring now to Fig. 2, the main line wires are indicated at 33 and 34, respectively, the closing switch at 35, the cut-out switch at 36, the double relay switch at 37, and the single relay switch at 38. Starting switch 35 may be of any suitable type such as the well known motor starting switch, arranged when closed to maintain itself in closed position and to automatically open its own circuit at said switch when its circuit is opened elsewhere. A line resistance is indicated. at 39, while the smaller resistance 40 is placed. in themotor circuit. From the diagram just referred to, it will be clear that upon closing the switch 35 current will pass from the positive side of the line indicated at 33 through the switches 35 and 36, thence through the coil 37 of the relay switch 37, and thence out through the switch 38, which is normally closed, to the negative side of the line indicated at 34. Actuation of the switch 37 will effect the closin of the circuit through the contacts 40 an thereby close the circuit through the motor 4. The machine is thus placed in operation and will continue to operate until the switch 36 is opened by the o erator which will deenergize coil 37 an the circuit through the switch 37 and thereby cause a cutting out of the motor; or until the safet switch 30 is actuated in the manner above escribed so as to close the circuit through the coil of the switch 38 and thereby'cause the switch 38 to be opened. Such opening of either switch 37 or 38 will'break the connection of the motor with the main line, leaving the motor in closed circuit with the resistance 40. As will be readily understood, continued operation of the motor due to the momentum gained through its positive operation while connected in the main line circuit will cause it to operate as a generator against resistance 40 and to gradually slow down and eventually come to a full stop.

Among the several advantages flowing from this invention are those which make it possible to limit the de ree of oscillation of the basket by setting t e springs at a predetermined tension andalso to allow the automatic cutting out and stopping of the motor in case the oscillation of the basket exceeds that for which the springs are set. Another advantage resides in the automatic means for feeding the'oil for lubrication of the spindle.

Other advantages resulting from this invention will readily suggest themselves to those who are familiar with the art to whiclr it relates.

\Vhat I claim is:

1. In an extractor, the combination of a curb, an overhung basket within said curb and capable of oscillatory movement, means for rotating said basket, and means for automatically retarding the rotation of said basket when the amplitude of oscillatory movement of said basket exceeds a predetermined amount.

2. In an extractor, the combination of a curb, an overhung basket within said curb. means for rotating said basket, means for limiting the oscillatory movement of said basket, and means for automatically retarding the rotation of. said basket when the amplitude of oscillatory movement of said basket exceeds a predetermined amount.

3. In an extractor, the combination of a curb, an overhung basket within said curb, means for rotating said basket, means for limiting the oscillatory movement of said basket, and electric means for automatically retarding the rotation of said basket when the amplitude of oscillatory movement of said basket exceeds a predetermined amount. at. In an extractor, a curb, an overhung basket within said curb, an electric motor for rotating said basket, and means for automatically braking said motor when the amplitude of oscillator movement of said basket exceeds a predztermined amount.

5. In combination with a centrifugal extractor having a rotatable basket, means for rotating the basket, and means controlled by oscillation of the basket for automatically stopping the extractor.

6. In combination with a centrifugal extractor having a rotatable basket, means for rotating the basket, means tending to prevent oscillation of said basket, and means controlled by oscillation of the basket for automatically stopping the extractor.

7. In combination with a centrifugal extractor having a rotatable basket, a motor for rotating the basket, and means controlled by oscillation of the basket for automatically short circuiting the motor.

8. In combination with a centrifugal extractor having a rotatable basket, a motor for rotating the basket, and means controlled by oscillation of the basket for automatically short circuiting and braking the motor.

9. In an extractor, a curb, an oi erhung basket within said curb, an electric motor for rotating said basket, and automatic means for dynamically braking said motor when the amplitude of oscillatory movement of said basket exceeds a predetermined amount.

10. In an extractor, a curb, an over-hung basket Within said curb, an electric motor for rotating said basket, means for limiting the oscillatory movement of said basket, and

means for automatically braking said motor when the amplitude of oscillatory movement of said basket exceeds a predetermined amount.

11. In an extractor, a curb, an overhung basket within said curb, an electric motor for rotating said basket, and electro-magnetic means controlled by the oscillatory movement of the basket for dynamically brakin the motor.

12. n an extractor, the combination of a frame, an oscillatory basket rotatable in said frame, an electric motor for rotating said basket, circuits for saidmotor, and means governed by motion of said basket for controlling said circuits.

13. In an extractor, the combination of a frame, an oscillatory basket rotatable in said frame, an electric motor for rotating said basket, circuits for said motor, and means governed by oscillatory motion of said basket for controlling said circuits.

14. An extractor, comprising a rotatable basket mountedfor oscillatory movement, rotating means therefor, and means governed by the oscillatory movement of said basket for limiting its speed of rotation.

15. An extractor, comprising a rotatable basket mounted for oscillatory movement, rotating means, therefor, means for limiting oscillatory movement of the basket, and braking means effective upon said basket when its oscillatory movement tends to exceed a predetermined amount.

16...,An extractor comprising a rotatable basket mounted for oscillatory movement. rotating means therefor, means for limiting oscillatory movement of the basket, and means governed by the oscillatory movement of said basket and adapted to control said basket when its oscillatory movement tends to exceed a predetermined amount.

17. An extractor, comprising a rotatable -basket mounted for oscillatory movement,

rotating means therefor, adjustable means for limiting oscillatory movement of the basket, and braking means effective .upon said basket when its oscillatory movement tends to exceed a predetermined amount.

18. An extractor, comprising a rotatable basket mounted for rotating means therefor, adjustable means for limiting oscillatory basket, and means'governed by the oscillatory movement of said basket and adapted to control said basket when its oscillatory movement tends to exceed a predetermined amount.

In testimony whereof I hereby aflix my JOSEPH B. SANDO.

signature.

oscillatory movement,

movement of .the i

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