US2188918A - Automatic position-selecting device - Google Patents

Description

J. H PRESSLEY 2 Sheets-Sheet l AUTOMATIC POSITION-SELECTING DEVICE Feb. 6, 1940.

Filed sept. 9, 1957 Feb. 6, 1940. 1 H. PRESSLEY 2,188,918

AUTOMATIC POSITION-SELECTING DEVICE Filed Sept. 9, 1937 2 Sheets-Sheet 2 Patented Feb. 6, 1940 y UNITED STATES PATENT OFFICE 2,188,918 AUTOMATIC POSITION-SELECTING DEVICE ,Jackson H. Pressley, Abington, Pa., assignor to Philco Radio and Television Corporation, Philli-l delphia, Pa., a corporation of Delaware Application September 9, 1937, Serial No. 163,131 14y Claims. (Cl. 172-239) This invention relates to automatic andereratus for controlling the adjustable condenser mote control positioning devices lsuch as may be elements of a radio receiver- A Course adjustemployed to adjust the position of a tuning ele,- ment device 2 and a fine adjustment device liefe ment or elements of a radio receiver. each adapted to control the positioning oi said 5 The principal object of the invention is to proelements. Both of the devices 2 and 3 are comvide a novel device which is capable of controlling mutators and are used to direct the flow of curthe adjustment of the shaft of the tuning element rent in the circuit as will be described in more to stop it accurately in a desired position in redetail hereinafter. In the Specie illustrtion, spense to a simple manual action such as the the radio receiver tuning elements I and the l operation of a selected push-button. By the rotor of device 2 are mounted on shaft l which 10 preferred form of the present Yinvention there is is geared to Shaft by reduction gearing l, 7- provided an apparatus which in response to such The rotor of device 3 iS mounted on shaft 5 which a simple Vmanual eiiort, iirst adjusts the conis driven by motor 8 and in turn drives shaft I. trolled element to an approximate position with- Thus, the rotors of the devices 2 and 3 are rotatin a selected range or zone and then automati- 8ble With the Shaft 4, and the Position 0f the cally adjusts the said element accurately to a I'OtOl' 0f device 3 is erleleted With the Position 0f desired position within said range. Shaft l.

This apparatus comprises two positioning de- The device 2, as illustrated, comprises a disk 9 vices, one adapted to effect the approximate ad- 0f insulating materiel, such as Bakelite. mounted `iustment and the other adapted to eiiect the 011 sharit l and Cel'l'yn Deir 0f arcuate cnduc- 20 accurate adjustment of the controlled element. tive Segments l0 and Il and also a conductive scs- Each of these devices controls-the effectiveness of ment l2 Which may take the form 0f n ring with the motive means to drive the controlled element. extensions i3 spliced from the' segments I0 und Each of said devices may comprise a plurality of H Electrical COTmectiOn i5 made t0 Segment n stop elements, those of one device corresponding by means 0f the Slip T1118 Il which iselectlieuy 25 c to various position zones or the controlled eleconnected to segment It, and likewise electrical ment and those of the other device correspond- Conneetion iS mede t0 segment Il by means 0f ing to particular positions within said zones. 511D ring i5 Which is C0nneeted t0 Segment Il. Means, which may conveniently consist oi a plll- Thebl'ushes l' and I1 Carried by a stator Plate Il 3. rallty of selector switches in cooperation wtlh an engage or wipe over the slip rings 'Il and I 5, electrically-operable switch, ls provided to ren- TeSPe0tiVe1Y A third brush I9 also carried by der thc first device effective to control c motor the stator plate engages the ring segment I2. A through o selected contact clement and, at the plurality ci brush-like contact elements 20 are same time, to effect energization of the motor, adiustebly mounted in 8 Slet 2| in the stator 36 until the controlled element arrives ctlts approxplate, although the elements 20 may be Dcrmcv;

imate position, when the electrically-operable nently Xed inPOSitiOn- These eonteet elements switch is actuated to render the first device inengage the conductive segments lll and Il and effective and to render the other device effective also the extensions I3 of segment l2 during rcto control the motor tation of the rotor, as will be described further 40 'I'he invention maybe more clearly understood hereinafter. Each of the contact elements 2l lilyreference to the accompanying drawings, in represents a particular range or zone oi movewhich ment of the tuning elements I.

Fig. l is a perspective view of one form of the The device 3, as illustrated, may comprise a apparatus with certain parts broken away for rotatable drum 22 having arcuate conductive M clarity of illustration ments 23 and u se parated by opposed insulating Fg 2 s a demll ew of one of the selective segments 25 (only one is shown). An end plate push-but on swi c es; 2s i rin 21 and Flc. 3 ls e schematic illustration of the elec- 2s call; toghe com tncal connections of the apparatus ductive segments 23 and 24,.- Brushes 2! and Il,

Fi 4 is a ra h'c illustration of the manner in Wich the pprtus Operates; and carried by the housing 3i, engage and wipe over Fig. 5 is a fragmentary sectional View illustratthe Slip rings 27 and 29, respectively A P11-trent? ing the adjustabley mounting of one of the control 0f brush-like Contact elements 32, eon'espendin elements. in nature to the contact elements 2li, are adjust- Referring to Fig. l, there isillustrated an appaably carried in slots I3 in the housing 3l. Each l tact fingers 43, this closes the of the contact elements 32 eil'ectively corresponds to a particular position of tuning elements I.

The rotor of device Zhas been illustrated as being a rotatable disk, and the rotor of device 3 has been illustrated as being a rotatable drum, merely for the sake of illustration. Either of these devices may take either of these forms or any other form by which the necessary switching or commutation may be obtained, as set forth hereinafter.

`'I'he apparatus comprises further a multiplepo1e,fdoublethrow switching device 34, which device comprises a row of stationary contacts 35, a second row of stationary contacts 38, and mov` able contact fingers 31 carried by amovable shaft or rod 38v and adapted to engage either row of stationary contacts, the fingers 31 being insulated from one another. The rod 38 is connected to an armature 39 lwhich is actuated by either of the solenoids 48 and 4I.

A plurality of selective manuals or push-button selector switches, designated generally 42, are provided, one for each position to which it may be desired to adjust the tuning element I. Each of these switches (see Fig. 2) may comprise spring inger contacts 43, 44 and 45 mounted on a common insulating support 46, and a push-button 41 which is adapted to engage the finger l43 and thus to cause one another. A latch 48 is provided for each switch, the row of latches being mounted for joint rotary movement on a rotatable rod 49. When one of the push-buttons is pressed inward.v it causes finger 43 to engage nger 44 and causes iinger 44 to engage iinger 45, and at the same time the push-button actuates the latch 48, releasing any previously depressed push-button. When the actuated push-button is released, the iinger 44 is permitted to move away from iinger 45 but the button is latched in and maintains the contact between ilngers 43 and 44. Thus the contact between ngers 44 and 45 is temporary and persists only as longI as the pushbutton is held in, but the contact between fingers 43 and 44 is maintained by the latching in of the button. When another push-button is pressed inward, any other push-button which is in latched position is released by the actuation of the latch mechanism. 'I'he purpose of this will be apparent later. f-

The electrical connections of the apparatus, although shown in Fig. 1, are more clearly shown in the diagram of Fig. 3, and the operation of the device will be described presently with reference to that figure. A source of electrical energy, shown as a battery 50, is provided for energizing the motor 8 and the lsolenoids 48 and 4I. A lamp 5| having a high impedance compared to the impedance of motor 8, is included in the motor circuit, and a short-circuiting switch 52 is shunted across the lamp, for a purpose to be described later.

Referring now to Fig. 3, wherein for simplicity the devices 2 and 3 are schematically illustrated as disks or drums with the elements 28 and 32 engaging their peripheries, normally switch 52 will be closed and the motor 8 and solenoids 40 and 4I de-energized, the armature 39 being within solenoid 40 so that switch elements 31 are in contact with switch elements 38. Suppose now that a push-button selector switch X corresponding to a desired broadcasting station is pressed inward, momentarily closing all three of its con- 44 and 45. It will be seen that circuit 53 energizing the solenoid i held in engagement by the three contacts to engage vice 2 is rotated only a 4I. The switch 34 is thus thrown to the left, as viewed in the ligure, closing at contacts 35. The releasing of the selector push-button disengages contact iinger 45 but the ngers 43 and 44 are the latch mechanism above described.

jI'he closing of switch 34 closes the motor circuit as follows-from the battery 58 through switch 52, the motor armature, the motor eld winding 54. switch 34, conductor 55, segment I Il of device 2, conductor 56, switch 34, conductor 51, contacts 43 and 44, and conductor 58 back to `the battery. The motor rotates shaft 5 clockwise, thus rotating the rotor of device 2 counterclockwise until the contact element to which conductor 56 is connected leaves the segment I0 les` and interrupts the motor circuit. The said contact element, however, engages segment I2 of device 2 and thus energizes the solenoid 40, as will be apparent, causing the switch 34 to throw to the right. The motor is then energized as follows: from battery 58 through the motor 8 (iield winding 54), switch 34. conductor 59, segment 24 of device 3, the contact element 32 corresponding to the above-mentioned contact element of device 2, conductor 69, switch 34, contacts 43 and 44, and conductor 58 back to the battery. 'Ihe motor 8 again rotates shaft 5 clockwise until the contact element to which conductor 68 is connected leaves segment 24 and engages the insulating segment 25, thus interrupting the'rnotor circuit.v Due to the reduction gearing between shafts l4 and 5, the rotor of deslight amount by the operation of device- 3. For example, if the gear reduction is 16 to l', the maximum possible rotation (180 degrees) of the rotor of device 3 during the fine adjustment operation will rotate the rotor of device 2 only about l1 degrees.

Thus the tuning elements I are adjusted to an approximate position within a certain zone by the action of device 2, and the tuning elements are then adjusted to an exact position in A that zone by the device 3. To adjust the tuning elements to any other desired station it is simply necessary to press another push-button corresponding to that station. l

As may be seen from Fig. 3, one end of the iield winding is connectible through switch 34 to segment I8 of device 2, whereas the other end is connectible to segment II. One of these two segments will be energized by contact with the element 28 and will cause the motor to rotate in such a direction as to cause the top of segment I2 to move towards the energized contact element 28. Likewise, when the second rotor is in use, the two ends of the field winding are connected to segments 23 and 24 of the device 3 and one of these segments will be energized by the contact element 32, causing the motor to rotate in such a direction as to make the top of insulated Segment 25 rotate towards the energized contact element 32. Hence, when the pushbutton is depressed, the motor will cause the tuning element to rotate towards the desired position. This rotation may of the approximate control 2 to the approximate tuningposition, at which point rotor 2 will relinquish control. This may occur either just be fore or just after the desired position is reached. In any event, the ne control 3 will then cause be carried by means the motor to rotate the device directly to the Y positions of the rotors of devices 2 and 3 which determine which field winding of the motor B will be energized. It will be obvious that any number of push-buttons and associated contact elements 20 and 32 may be provided within the bounds of practicability and the mechanical limitations of the particular apparatus. Moreover, the contact elements and associated circuits cannot interfere with one another, since the circuit of only one contact element will be energized at one time.

The operation of the device may be more clearly understood from the following explanation with reference to Fig. 4. Suppose that the tuning element I may be adjusted through 180 and that it is desired to adjust the tuning element to any one of six positions within this range. Referring to Fig. 4, these six positions, which may correspond to sixdiierent broadcasting stations, are indicated by the lines A, B, C, etc. The device 3 is adapted to adjust the tuning element I accurately to the desired position provided, however, that the tuning element is first brought approximately to the desired position. As will be apparent, the device 3 can control the tuning element I only through an angular displacement corresponding to the angular size of the segments 23 and 24 divided by the gear ratio between the device 3 and the tuning elements I, and the accuracy with which the device 3 will adjust the positioning of the tuning element I is similarly determined by the arcuate width of the segment 25 and the gear ratio. If, for example, the segments 23 and 24 each extends for about 176". and the gear ratio (6-1) is 16 to 1, then the device 3 will bring'the tuning element to the desired position from any position within the range 11 on either side of the desired posif interfere with another.

The device 2 will adjust the tuning element te a position determined by the angular displacement between the segments I0 and II, and the contacts 20 should be adjusted so that this region is 4entirely within the zone corresponding to the station which it is desired to receive. For example, in Fig. 4 the region g indicated by the double arrow lines, indicates the region within` which the device 2 will first adjust the tuning element and then the device 3 will comploete the tuning or adjusting operation. It is necessary that the region, for example region g, be entirely within the zone, for example zone a, over which the device 3 has control. The region, however, may be anywhere ,within the zone, as forexample, the region l is on one side of position Bn but still within zone b. Where two stations have overlapping zones, as for example, stations and F, and Where the region corresponding to an element 20 of device 2 can be positioned entirely within ,both zones, then a single element 20 may be used with both elements 32 to cause .adjustment of the device to either E or F depending upon which of the elements 32 is employed.

Thus," it will be apparent that the device 3 will control the adjustment of the tuning element I, provided it is first brought within the zone over which the device 3 has control, and that the device 2 serves to iirst adjust the tuning element I to a position within that zone after which the device 3 takes control to complete thefinal adjustment.

As indicated above, it is not necessary that there be a contact element 20 corresponding to each contact element 32. It is, however, necessary that there be a section of switch 42 and of switch 34 and a contact element 32 for each station that it is desired to tune. For example, the

- several contact elements 20 may be permanently fixed so as to divide the tuning range into a number of iixed regions. Several stations within any one region may be automatically tuned in by providing a contact element 32 for each desired station. Each of these different elements 32 would then cooperate with the same element 20 to effect the desired tuning. e In this instance, each element 32 would be connected to a different section of switch 34 but the same element 20 would be connected to each of these several switch sections. This arrangement is shown in Fig. 3 by contact 20a which is connected to cooperate with either contact 32a or 32h to tune in a station corresponding to either 32a. or 32h, both stations being located in the region of contact 20a.

It will further be apparent that it is unnecessary to use the manual push-button station selector means shown but that, if desired, an automatic time-controlled mechanism may be used to effect the switching operation herein villustratednas performed by the several selective manuals 42. Such mechanisms are well known and are to be considered the equivalent in circuit operation of the push-buttons 42.

In practice, it may'be desirable to mount the device 3 on the tuning element I which is often resiliently mounted. In this case, the device 2 may be separately mounted and connected to I through a flexible coupling. While the contact elements 20 and 32 may be adjustably mounted in any suitable manner, there is shown in Fig. 5 one form of adjustable mounting wherein the insulating plate 6I, corresponding to either the stator plate I8 or the housing 3|, carries an adjustable sleeve 82 within which a springapressed brush 63 is disposed, the brush engag- 'ing surface 84 corresponding to the rotor surface of either device 2 or device 3. 'Ihe adjustment screw 65 also serves to hold the terminal 66 to which electrical connection is made. i

V4The principal purpose of lamp 5I is to enable the manual adjustment of contact elements 20 and 32 without causing undesired operation of the apparatus. When the switch 52 is opened,

the high impedance of the lamp is inserted in the motor circuit and prevents operation of the motor. With the radio receiver tuned manually to a certain' station, the apparatus may then be adjusted as follows: The push-button to be used for that station is pressed, causing switch v34 to throw to the left as above described. The contact element 20 associated with the particular push-button is then moved until the lamp is extinguished and the switch u throws te the right. The contact element 32 associated with the particular push-button is then moved until the lamp is again extinguished. 'I'his process is repeated foreach of the push-buttonsv and the lassociated contact elements, it being understood,

of course, that the radio receiver will 'be tuned manually to each desired station before the adjustments are made.

It will be apparent that the invention is capable of various modes of expression and is applicable to various usages. It is not, therefore, to be limited by the disclosure herein contained.

I claim:

l. In an apparatus for positioning a movable element, a motor for moving said element, a positioning device comprising a plurality of contact segments engageable by a contact element, a circuit including one of said contact segments and said contact element for controlling the energization of said motor to move said movable element to a selected position range or zone, a second positioning device for controlling the energization of said motor to move said movable element to a desired position within said range, means for connecting either of said devices to said motor to the exclusion of the other device, manually operable means for actuating said connecting means to connect said first device to Said motor, and a circuit including another of said contact segments and said contact element for actuating said connecting means to connect said second 'device to said motor when said movable element has been moved to a position Within said range.

2. In a control apparatus for positioning an element, such as a radio tuning element, having a rotatable shaft, a motor for rotating said shaft, a first positioning commutator constructed and arranged to rotate in correlation with said shaft, a second positioning commutator geared to said shaftand arranged to have greater angular displacement than said first positioning device, a plurality of segments on cach commutator, a contact for each commutator engageable with said segments, two circuits through said mqtor for causing said motor to rotate in either direction, a switch for connecting segments of one or the other of said commutators in circuit with said two motor circuits, and an additional circuit on said first commutator for operating Said switch to disconnect said first commutator and connect said second commutator to said two motor circuitsvwhen said shaft is rotated to a selected position.

3. In a control apparatus for positioning a movable element, a first positioning device for `controlling the movement of said/element to a selected position range or zone, a second positioning device for controlling the movement of said element to a desired position within said range, a linkage between said second positioning device and said element for correlating the position of the former vwith respect to the latter, a selective manual, and switching means controlled by said selective manual and said first device for rendering said devices effective successively to control the movement of said element.

4, In a control apparatus for positioning a rotatable shaft, a motor for rotating said shaft, a first positioning device for controlling the rotation of said shaft to a selected position range or zone, said positioning device comprising a rotor carrying spaced contacts and a plurality of contactvelements engaging said rotor contacts, said yrotor being rotatable by said shaft, a second positioning device for controlling the rotation of said shaft to a desired position within said selected range, said second positioning device comprising arotor carrying spaced contacts and a plurality of contact elements engaging said rotor contacts and each corresponding to a desired position within a position range or zone, a linkage between said second positioning device and said lshaft for ,correlating the position of the former with respect to the latter, means for connecting eitherof said devices to said motor to the exclusion of the other device, selector means for energizing said motor and for actuating said connecting means to render said first device effective to control the rotation of said shaft, and means for subsequently actuating said connecting means to render said first positioning device ineffective and to render said second positioning device eil'ective to control the rotation of said shaft.

5. In ac control apparatus for positioning an element such as a radio tuning element having a rotatable shaft, a motor for rotating said shaft, a first positioning device rotatable with said shaft for controlling the rotation' of said shaft to a selected position range or zone, a second positioning device rotatable with said shaft for controlling the rotationof said shaft to a desired position within said range, a iirst circuit including the first positioning device for controlling the energization of said motor to cause rotation of said shaft to said desired position range or zone, a second circuit including said second positioning device for controlling the energization of said motor to cause rotation of said shaft to said desired position, a switch for selectively energizing said circuits and means on said first positioning device for actuating said switch to deenergize said iirst circuit and to energize said second circuit when said shaft has been rotate to said selected position zone or range.

6. In a control apparatus for positioning a movable element, a reversible motor for moving said element, a commutator having a pair of main conductive segments and an auxiliary conductive segment, at least one contact element adapted to engage said segments, a pair of circuits for said motor connected respectively to said main segments, manually operable means for connecting said contact element in circuit with said motor and an energizing source therefor, whereby said apparatus operates to position said movable element, a circuit connected to said auxiliary segment and to said contact element, and switching means controllable by said last-named circuit for transferring control of said motor to an auxiliary device. y

'a'. In a control apparatus for. positioninguan element such as a radio tuning element having a rotatable shaft, a motor for rotating said shaft, a first positioning device rotatable with said shaft for controlling the rotation of said shaft to a selected position range or zone, a second positioning device rotatable with said shaft for controlling the rotation of said shaft to a desired position within said range, a first circuit including the first positioning device for controlling the energization of said motor to cause rotation of said shaft to said desired position range or zone, a second circuit including said second positioning device for controlling the energization of said motor to cause rotation of said shaft to said desired position, an electrically operable switch for energizing either of said circuits, a selector switch having momentarily operable contacts for-energizing said electrically operable switch in a direction to energize said first circuit, and means on said first positioningxdetice for energizing said electrically operable switch in another direction to deenergize the first circuit and energize the second circuit when said shaft has been rotated to said selected position vzone or range.

8. In a control apparatus for positioning a radio tuning element having a rotatable shaft, a reversible motor for rotating said shaft, an energizing circuit for said motor, a iirst commutator rotatable with said shaft and comprising a pair of main conductive segments and an intermediate conductive segment, a plurality of contact elements arranged to engage said segments, circuit connections to said segments and said contact elements, a second commutator rotatable withAsaid shaft and comprising a pair of conductive segments, a plurality of contact elements arranged to engage said last-mentioned segments, circuit connections to said segments and said contact elements, electrically-operable switching means constructed and arranged to connect said vmotor to the pair of segments of either commutator and to connect the motor `circuit to the associated lcontact elements, a plurality of selector switches for completing the circuit of any one of the contact elements, each of said selector switches being constructed and arranged to energize said electrically-operable switching means so as to complete the circuit connections to said first commutator and its associated contact elements, and a circuit completable through the intermediate segment of saidfirst commutator for energizing said electrically-operable switching means so as to complete the circuit connections to said second commutator and its associated contact elements.

9. In a control apparatus for positioning a radio tuning element having a .rotatable shaft, a reversible motor for rotating said shaft, an energizing circuit'for said motor, a first commutatnr rotatable with said shaft and comprising a pair of main conductive segments and an intermediate conductive segment, a plurality of contact elements arranged to engage said segments, circuit connections to said segments and said contact elements, a second commutator rotatable with said shaft and comprising a pair of conductive segments, a plurality of contact elements arranged to engage said last-mentioned segments, circuit connections to said segments and said contact elements, an electrically-operable multi-pole double-throw switch arranged to connect said motor to the pair of segments of either commutator and to connect the motor circuit to the associated contact elements, a plurality of selector switches for completing the circuit oi' any one of the contact elements, each of said selector switches being constructed and arranged to energize said electrically-operable switch in one direction, and a circuit completable through the intermediate segment of said rst commutator for energizing said electrically-operable switch in the opposite direction.

10. In a control apparatus for positioning a radio tuning element having a rotatable shaft, a reversible motor for rotating said shaft, an energizing circuit for said motor, a iirst commutator rotatable with said shaft and comprising a pair of main conductive segments and an intermediate conductive segment, a plurality of contact elements arranged to engage said segments, circuit connections to said segments and said contact elements, a second commutator geared to said shaft so as to rotate to a greater extent than said shaft and comprising a pair of conductive segments, a plurality of adjustable contact elements arranged to engage said last-mentioned segments, circuit connections to said segments and said contact elements, an electrically-operable multipole double-throw switch arranged to connect said motor to the pair of segments of either commutator and to connect the motor circuit to the associated contact elements, a plurality of selector switches for completing the circuit of any one of the contact elements, each of said selector switches being constructed and arranged to energize said electrically-operable switch in one direction, and a circuit completable through the intermediate segment of said first commutator for energizing lsaid electrically-operable switch in the opposite direction. t

l1. In a control apparatus for positioning a rotatable shaft, a motor for rotating said shaft, a pair of positioning devices each operable by said motor, each of said positioning devices comprising circuit making and breaking elements for -said motor, each of said positioning devices comprising a plurality of contact segments engageable b y a contact element for controlling the operation of said motor, the said contact element representing a position of said shaft,l

means for connecting one of said devices to said motor to the exclusion of the other and vice versa, manually operable means for initiating operation of the apparatus and for actuating said connecting means to connect one of said devices to said motor, and means including a contact segment on said one device for actuating said connecting means to connect the other of said devices to said motor.

13. In a control apparatus for positioning a rotatable shaft, a motor for rotating said shaft,

'a pair of positioning devices each operable by said motor, each of said positioning devices comprising circuit making and breaking means, including a plurality of contact elements corresponding respectively to positions of said shaft, for controlling the operation of said motori, means for connecting one of said devices to said motor to the exclusion of the other and vice versa, manually operable means for selecting a contact element corresponding to a desired shaft position and for simultaneously actuating said connecting means to connect one of said devices to said motor, and means controllable by said one device for actuating said connecting means to connect the other of said devices to said motor. 14. In a control apparatus for positioning a rotatable shaft, a motor for rotating said shaft, two circuits through said motor for causing said motor to rotate in either direction, a commutator including two main segments and, an intermediate segment arranged to rotate in correlation with said shaft, a second commutator comprising two main 'segments arranged to rotate through a greater angle than said first commutator, a double throw change-over switch, circuits through one side of said switch and the main segments of the rst commutator to the two motor circuits; circuits through the other side of said switch and the main segments of said second commutator to the two motor circuits, an operand to close circuits of'said second commutator, ating mechanism for said switch, a circuit a manually operable switch, and an aouxiliary through the intermediate segment of said nrst circuit through said manually operated switch commutator for energizing said operating mechafor energizing said operating mechanism to re- 5 nism `to operate. said change-over switch, to tur said change-over switch to normal position. 5 thereby open al1 circuits of said mst commutator 4 JACKSON H. `ERESSLEY.

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