US2357475A - Hatmaking apparatus and method of operating same - Google Patents

Description

J. E. KANE Sept. 5, 1944.

HAT MAKING APPARATUS AND METHOD 0F OPERATING SAIE 8 Sheets-Sheet l Filed July 8, 1940 INVENTOR E. Kane M11/w44! TTORNEYS 5, 1944- J. E KANE 2,357,475

HAT MAKING APPARATUS AND METHOD OF OPERATING SAIE Filed July-.8, 1940 8 Sheets-Sheet 2 -TEVE /ZZ 124 [Z8 l H4 95 y JOE'ERKane BY f VMTORNE Sept 5, 1944. J. E. KANE 2,357,475

HAT MAKING APPARATUS AND METHOD OF OPERATING SAME Filed July 8, 1940 8 Sheets-Sheet 3 IIII IIHII INVENTOR John E. Kane ATroRNEYs Sept 5. 1944. J. E KANE 2,357,475

HAT MAKING APPARATUS AND METHOD OF OPERATING SAIE YJo/zn E. Kane SePt 5, 1944. J. E. KANE 2,357,475

HAT MAKING APPARATUS AND METHOD OF OPERATING SAME Filed July 8, 1940 8 Sheets-Sheet 5 NVENTOR Jo/zn E. .Kane

Sept. 5, 1944.

J. E. KANE 2,357,475

HAT MAKING APPARATUS AND METHOD OF OPERATING SAME Filed July 8, 41940 B Sheets-Sheet 6 INVENTOR John E. Kane hm/M* www? ATTOR N EYS UNITED STATES PATENT OFFICE HATMAKING APPARATUS AND METHOD OF OPERATING SAME John E. Kane, Danbury, Conn., assignor to The Frank H. Lee Company, Danbury, Conn., a corporation of Connecticut Application July 8, 1940, Serial No. 344,338

26 Claims.

This invention relates to the handling of fur and more particularly to an apparatus and a method for supplying fur to a bat-former cone to thereby form hat bodies or bats from the fur.

An object of this invention is to provide apparatus for handling fur in a carefully controlled and eilicient manner to form hat bats, for example upon perforated cones. Another object is to provide a method and apparatus for handling fur and the dividing of fur into predetermined amounts. A still further object is to provide a method and apparatus of the above character for supplying fur in predetermined quantities to the cones of a bat-former in a dependable and eilicient manner. A further object is to provide apparatus of the above character for receiving bulk fur and producing from this fur bats of standard high quality and of proper size and weight. Another object is to provide apparatus which is compact and sturdy in construction and efiicient and dependable in operation. A still further object is to provide a thoroughly practical and dependable method of operation and control for apparatus of the above character. These and other objects will be more fully pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements, arrangements of parts and in the several steps and relation and order of each of the same to one or more of the others, all as will be illustratively described herein, and the scope of the application of which will be indicated in the following claims.

In the drawings:

Figure 1 is a vertical longitudinal section of one embodiment of the invention with certain of the structure broken away and with certain details omitted for clarity;

Figure 2 is an enlarged plan view of the apparatus for removing fur from the fur hopper at the right-hand side of Figure 1, with the central portion of the hopper omitted;

Figure 3 is an elevation from the left-hand side of Figure 2;

Figure 4 is an elevation from the right-hand side of Figure 2;

Figure 5 is a vertical longitudinal section on the line 5--5 of Figure 4;

Figure 6 is an elevation of the means for adiusting the tension on the feeder apron;

Figures '7 and 8 show a means for handling the fur as it is being removed from the supply hopper; Figure 7 being a sectional view, and Figure 8 being a fragmentary plan view;

Figure 9 is a longitudinal section of a clutchroller mechanism which is used when the feeder apron is divided into sections; and

Figure 10 is a schematic wiring diagram showing the control circuit for the apparatus of Figure 1.

This application is a continuation-impart of my copending application, Serial No. 264,903, iiled March 30, 1939, entitled Hat making apparatus and issued July 9, 1940, as Patent No. 2,207,407. As stated in this copending application, some of the apparatus disclosed therein is similar to that disclosed in the then copendlng application of George T. Blrdsall, Serial No. 173,285, led November 8, 1937, and issued September 12, 1939, as Patent No. 2,172,343. 'Ihe present application likewise discloses certain apparatus which is related to certain of the apparatus disclosed in this Birdsall patent.

In making felt hats, the fur is treated by a process known as "carroting" so that the fur acquires felting characteristics and in that condition, the fur is deposited in a thin layer upon a large cone to form a hat body or bat. When being deposited, the fur forms into a loose sheet over the entire cone, and after being removed from the cone, the bat is worked and treated so that it felts and shrinks. When the bat has reached the proper size, it is subjected to further processing to thereby shape it and prepare it as a finished hat. It is important that the hat bats be of uniform weight and of high quality so that the processing of the bats will be uniform and so that the finished hats will be of smooth, even felt which is durable. In obtaining these results, the amount of iur deposited to form each bat must be carefully measured, and the fur must be deposited in a uniform manner over the cone. In practice, the fur is thrown into the top of the forming tower and falls downwardly onto the cone. The cone is perforated, and suction within the cone draws air in through the perforations so that, as the individual hairs fall, they are drawn against the cone.

When the iur is thrown into the top of the forming tower, each individual hair should move independently of the other hairs so that the fur will be deposited on the cone in an even layer. Thus the individual hairs should be thoroughly separated at the time they reach the forming tower. When the fur is stored or handled in bulk, it is often rolled and worked to an extent that the hairs tend to mat. Accordingly, it is important that, prior to being deposited upon the cone, the fur be thoroughly separated, as by successive picking operations.

Illustratively, the fur is stored in bulk form, and when it is to be used, it is placed in a hopper. From this hopper, the fur is dispensed to a weigher, and control mechanism is provided which accurately controls the supplying of fur to the weigher and the dumping of the weighed quantities of fur from the weigher. Each of these individual quantities of fur is sufficient to form a hat bat, and is carried from the weigher to the forming tower where it is deposited upon a cone. In the present embodiment, the steps of moving the fur from the hopper and delivering the fur to the forming tower are utilized to carefully separate the fur so that the individual hairs fall onto the cone in the manner referred to above. After a quantity of fur sufficient to form a bat is deposited upon the cone, the cone is removed from the forming tower, and the bat is wetted and stripped from the cone for further operations.

The various steps of this process are properly correlated in the present embodiment so that the entire mechanism operates as a unit. Thus the fur-moving and weighing operations, and the operations of the bat-forming tower and the associated parts, are correlated to thereby produce bats in an eillcient manner. This result is obtained by providing a central unified controller which depends mainly upon electrically operated solenoid units, some of which in turn control air and water valves and air-pressure systems.

The fur is removed from the hopper and delivered to the weigher at a variable rate which rate is automatically controlled. During the delivery of fur to form each of the predetermined quantities, the initial amount of fur is delivered to the hopper of the weigher at a rapid rate, and when the fur in the hopper approaches the desired quantity, the rate of delivery is automatically reduced. In this manner, the major portion of each quantity of fur is quickly delivered to the hopper, and the total time required to deliver a quantity of fur to the hopper is thereby materially reduced. However, at the end of the weighing operation, the rate of fur delivery is very slow so that the supply of fur is stopped at the exact time that the proper amount is delivered to the scales hopper, and as a result, the quantity of fur is not overweight or underweight. Thus, the reduction in the time necessary for performing the Weighing operation does not impair the accuracy of the weighing operation.

By providing suitable control mechanism and suitable variable means for delivering fur to the weigher, the weigher completes its weighing operation before the completion of the step of depositing the previously weighed quantity of fur on the cone. This makes it possible to more accurately correlate the various operations of the apparatus as the time of weighing is readily adjusted to meet the other conditions of use. In addition to this, the various operations of the entire apparatus are interrelated through the control mechanism to give great flexibility of action. Thus, the apparatus normally completes the cycle of operation in a minimum length of time, but if one portion of the apparatus encounters a delay, the control mechanism continues to supervise the other operations without undue loss of time.

Referring particularly to the right of Figure 1,

a hopper 2 is provided with a vertically extending apron 4 which is in the form of an endless belt built up of strips 6 each of which is provided with a plurality of barbs 8. Apron 4 moves, as indicated by arrows, with the right-hand side moving upwardly and carries fur from the hopper. Barbs 8 are rigidly set in their respective strips at an angle, extending toward the direction of movement. Thus, they tend to grab and retain the fur as they move upwardly, and as a result, they carry a layer of fur upwardly from the hopper.

Adjacent the top of the apron and to the right thereof is a rapidly rotating back wiper I0 which is formed of four barb-carrying strips evenly spaced about a shaft l2. Back wiper l0 rotates counterclockwise with the side adjacent apron 4 moving opposite to the direction of movement of the apron. Thus, the barbs on wiper ID scrape excess fur from the barbs 8 of apron 4 and permit only a layer of a controlled thickness to move from the hopper.

To the left of the top of apron 4 is mounted a front wiper I 6 which is a wooden roller carrying a plurality of barbs I8. Below front wiper I 6 is a deector plate Il which defiects the fur away from the downwardly moving apron 4. Front wiper I6 rotates very rapidly with respect to the movement of apron 4, and as the layer of fur is carried to the front wiper, it is picked from the apron by barbs I8, and the fur is thereby thoroughly separated.

This finely divided fur falls from front wiper I 6 over the top of deector plate i1 and down to the hopper 20 of the balance scale mechanism, generally indicated at 22. Hopper 20 is provided with a dumping bottom which is controlled by solenoids in a manner more clearly pointed out below. When the proper amount of fur has been delivered to the scale hopper, the dumping mechanism is operated, and the fur falls onto an endless belt 24 which extends between a pair of rollers 23 and 25. During the dumping operation, fur is diverted from the top of the scale hopper by a baille 26 which is of a heavy mesh screen and which normally hangs in the vertical position shown, but which is moved to the broken-line position when the proper quantity of fur has been delivered to the hopper, and it is held in this broken-line position while the dumping mechanism operates. The fur is carried to the left on apron 24, and at the left, it moves under an idler roller 28 to a pair of feed rollers 3D.

As the fur emerges from the left of the feed rollers, it enters the bottom of a vertically extending chute or passageway, generally indicated at 32; this passageway extends the entire width of the machine. Within this passageway and adjacent feed rollers 30 is a rapidly rotating picker 34 which rotates clockwise and separates the fur and impels it with a stream of air upwardly within the passageway. Below the picker, passageway 32 is provided with an adjustable air inlet 36, and picker 34 rotates at such a rate that air moves in through inlet 36 and up the passageway. The size of inlet 36 is varied by moving plate 33 vertically; plate 33 is adjustably held in position by a plurality of thumbnuts 3l.

Extending along the top of passageway 32 are two perforated sieve-rollers 38 and 40 which extend the width of the machine and totally close the top of the passageway. The perforations in these sieve-rollers form an air outlet for the air which is drawn in at the bottom of the passageway, and, as the air escapes, the fur impelled upwardly by picker 34 and entrained in the air moves against the sieve-rollers 38 and 40 forming layers of fur thereon. Sieve-roller 38 rotates clockwise, and sieve-roller 40 rotates counterclockwise, and the two layers of fur formed on the two sieve-rollers combine where the rollers meet into a single layer of fur which is carried over the top of sieve-roller 40 and is fed by a roller 42 into a pair of feed rollers 44. As the layer of fur emerges at the left of feed rollers 44, it is caught by a top picker 46, and the fur is completely subdivided and moves over roller 48 to the left.

In this embodiment, sieve-rollers 38 and 40 are provided with internal bailles 3| and 35, respectively, which extend the length of the sieve-rollers and which deflect the air toward the ends of the sieve-rollers. Baffie 3| is rockably mounted by means of a web structure upon the shaft of the sieve-roller 38, but rotation of the baffle is prevented by a downwardly extending weight 39. Baffie 3| extends from where the two sieve-rollers meet to the top of sieve-roller 38. Likewise, baiiie 35 extends from where the two sieve-rollers meet to where sieve-roller 40 is adjacent roller 42, and is mounted on the shaft of sieve-roller 40 with a. weight 4| to prevent rotation of the baffle. Accordingly, the air enters the sieve-rollers from passageway 32 and deposits the layers of fur on the sieve-rollers, but in escaping, the air moves to the ends of the baiiles. As a result, the escaping air does not disturb the fur which is moving over the top of sieve-roller 40 and across roller 42 to feed rollers 44.

Top picker 46 and roller 48 are enclosed in a chute 50 which extends to the top of the forming tower, generally indicated at 52. Forming tower 52 encloses a perforated cone 54 which is mova'bly supported upon a rotating base and which is provided with an internal suction in a manner more fully pointed out below. Top picker 46 and roller 48 are so adjusted that when fur is being deposited, the fur moves in a steady stream from chute 50 into the top of forming tower 52 and downwardly toward the perforated cone 54. The suction on cone 54 is suflicient to draw the individual hairs onto the cone, and a bat is formed of uniform thickness throughout.

When the quantity of fur to form a bat has been deposited upon a cone, the sieve-rollers 38 and 40 are stopped, and fur is no longer delivered to the forming tower 52. The two sets of vertically swinging doors 20| of forming tower 52 then open, and the cone with the bat thereon is swung out of the forming tower. Simultaneously, another cone is moved into the forming tower and the forming tower doors are closed again. The sieve-rollers 38 and 40 are restarted at the proper time to start delivery of fur to the cone within the forming tower as soon as the doors are reclosed.

The cone with the bat thereon is moved to a sprayer (not shown) and the bat is sprayed with hot water, whereupon an automatic flipper means inverts the cone and the bat is stripped from the cone. The empty cone is returned to its position at the side of the forming tower and is ready again for use. During the movement f the cone from the forming tower with the bat thereon, full suction is maintained on the cone, but when the bat becomes partially wetted, this suction is reduced. Full suction is again placed upon the cone at the time the cone is returned to the forming tower.

The speciiic mechanism for wetting the bat and for moving the cone between the forming tower and the wetting station, as well as between the wetting station and the bat-removing station, is explained in detail in my copending application, referred to above. This mechanism, as well as its control means is discussed more fully below, and except as pointed out, the apparatus is illustratively the same as that shown in my copending application. For the sake of brevity and clarity, certain details are omitted from the present showing, though certain of this structure will be described briefiy. It should be noted that in the embodiment of my copending application as well as in the present embodiment, a single forming tower is provided and there are two cones which are alternately moved into the forming tower. Each cone is provided with its own suction means as well as its own bat-wetting and bat-removing mechanism.

In Figure l, one of these cones, 54, is shown positioned in the forming tower to receive fur to form a bat. Cone 54 is mounted on a rotatable base |66 which is mounted upon a circular frame |68. Mounted below frame |68 is a motor |69 which is provided with a gear at the upper end of its shaft cooperating with a ring gear on the rotatable base |66. During the time that fur is being deposited upon the cone and during the wetting operation, motor |69 rotates the cone so that fur is evenly deposited upon the cone and so that the bat is evenly wetted.

Frame |68 is rigidly mounted upon the top of a pipe |10 which extends to a sealing ring |12 on the floor and which is connected to a suction fan (not shown). Suction pipe |10 is adapted to swing about the sealing ring |12 and the swingable left-hand end of the suction pipe is supported by a pair of rollers |14. Movement is imparted to suction pipe |10 by a crank |18 which is connected through a link to a crank arm |82. Crank arm |82 is rigidly mounted upon the end of a stud shaft (not shown) and rigidly mounted upon the lower end of the stud shaft is a pinion |86 which cooperates with a rack (not shown). This rack is provided with a cylinder and piston unit at each of its ends, the cylinder |96 of one of these units appearing in Figure 1. Air is alternately supplied to these cylinder and piston units to move the rack back and forth and this movement of the rack rotates pinion |86 to thereby swing crank arm |82. In this manner, suction pipe |10 is swung back and forth through an arc with each of the cones being moved between its position within the forming tower and its wetting position.

Reverting to the weighing and conveying mechanism, the weighing mechanism is somewhat similar in construction and operation to that shown in my copending application referred to above. The fur is rapidly and accurately weighed by delivering fur to the hopper at a rapid rate during the time that the major portion of each quantity of fur is being delivered to the hopper and then delivering the fur at a slow rate when the amount of fur in the hopper approaches the desired weight. Accordingly. the weighing mechanism is provided with two individually operating sealed switches 114 and 562 (see Figure 10) which are sequentially closed when the scale-arm 2| makes the first movement toward the balanced position. This movement occurs when substantially the desired quantity of fur has been delivered to the scale hopper 20, with switch 114 closing approximately one and one-half seconds before the closing of switch 562. The closing of switch 114 raises .the armatures of a relay switch '|66 which moves back wiper I (Figure 1) toward apron 4 to thereby reduce the thickness of the layer of fur being presented to the front wiper I6 by the apron. The closing of switch 562 reduces both the speed of apron 4 and the speed of rotation of the front wiper, and the operating relationship between the various parts ls such that the layer of fur of reduced thickness is presented to the front wiper I6 at the time the front wiper speed is reduced. As pointed out below, this manner of operation results in the fur being thoroughly separated and delivered to the scale hoppers so that proper weighing occurs.

Mounted adjacent the left of the scale-arm 2| is a spot-light 962 and to the left of the spotlight is a photo-electric relay unit, generally indicated at I9. The spot-light 962 normally plays a beam of light upon the photo-electric cell, but when the scale-arm tips to the fully balanced position, a bracket 964 on the left end of the scale-arm intercepts this light beam. When this light beam is intercepted, the photoelectric cell operates switch units in a manner pointed out below to stop apron 4 and to raise baffle 26 to its broken-line position so that fur is deiiected from the top of the hopper. Simultaneously, circuits are conditioned to permit the opening of the bottom-dumping mechanism of hopper' 2D, and if the other operations are completed, the bottom-dumping mechanism is opened to dump the fur on endless belt 24. The bottom-dumping mechanism then recloses and the baille 25 is returned to its full-line position, so that fur again may be delivered to the hopper. Immediately, the delivery of the fur to the hopper is restarted and while the previously weighed quantity of fur is being conveyed to the forming tower and deposited upon the cone, a new quantity of fur is being weighed and dumped onto endless belt 24.

During the actual weighing of the fur, no fur is deposited on endless belt 24, and thus the fur moves to feed rollers 30 and forward to the forming tower in definitely divided quantities which are spaced apart sufficiently to allow for any abnormal conditions in the conveying of any particular quantity of fur. As will be more fully explained below, sieve-rollers 38 and 40 are stopped at a predetermined time in the timing cycle prior to the opening of doors 20|. This permits al1 of the fur which is passed by the sieve-rollers to move through feed rollers 44 and beyond picker 46 to the Cone in the forming tower before the doors are opened. Likewise, during normal operation, sieve-rollers 38 and 40 are started prior to the closing of the doors; and at the time the doors are closed, fur starts collecting on the cone without delay.

During the time that the sieve-rollers are stopped, a portion of the quantity of fur to form the next bat is collected on the sieve-rollers and, in fact, any stray fur which may be present is collected in this manner. When the sieverollers are restarted, this layer of fur is immediately fed through feed rollers 44 to picker 46 and thence to the forming tower. This initial quantity of fur deposited upon the empty cone i5 sufficient to form a thin layer of fur over the entire cone. This effectively prevents the fur from being drawn through the perforations in the cone as might occur if the feeding of the fur to the cone were started slowly. The quantity of fur initially delivered to the cone in this manner is regulated by controlling the amount of fur delivered to the sieve-rollers while they are stopped.

As indicated above, each quantity of fur is rapidly and accurately weighed by delivering the fur to the hopper 20 at a rapid rate during the time that the major portion of the fur is being delivered to hopper 20 and delivering the fur at a slow rate when the amount of fur in hopper 20 approaches the desired quantity. In the embodiment of Figures 1 to 6 and 10, this result is obtained by reducing the speed of apron 4 so that the layer of fur is presented to front wiper I6 at a slow rate, and in addition, the back wiper IU is moved closer to the apron so that a thinner layer of fur is presented to the front wiper. By combining these two actions, the fur is delivered to the scale hopper in a reliable manner and in a minimum of time. Under some circumstances. it is desirable to omit either the step of reducing the sped of apron 4 or the step of moving the back wiper, The time in the weighing cycle when the reduction in the speed of feeding fur occurs is adjusted depending upon the Characteristics of the fur being weighed and upon the weight of the bat being formed by the machine.

In this embodiment, back wiper I0 is swung through an arc to and from the apron, but the axis of rotation is maintained parallel to the top of the apron. Accordingly, the back wiper shaft I2 extends (see Figure 2) beyond the hopper side walls through arcuate slots 60 (see also Figure 3) with the ends of the shaft supported by swinging arms I3 and I5 (Figure 4). Shaft I2 is mounted in these arms in the manner shown in Figure 5, there being for each arm a double ball-bearing unit 6I with oil seals, and the upper end of the arms being rigidly carried on the ends of a pivot shaft II. Pivot shaft Il is rockably mounted in suitable sleeve bearings 63 in the side walls of the hopper.

As shown best in Figure 4, the back wiper shaft I2 is normally held away from the apron 4 (to the left in Figure 4) by a coil spring l2, the left end of which engages a lug I4 on the lower end of arm I5. The other end of spring I2 (see also Figure 2) is adjustably retained by a bracket 'II upon the base frame. At the left (Figure 4) arm I5 is limited in its movement by the engagement of lug I4 with an adjustable stop unit 'I6 which is adjusted by turning a thumb screw 'I9 and which is then locked by means of a lock nut TI.

'I'he back wiper is moved from its position away from apron 4 t0 its position adjacent apron 4 by a toggle unit shown in Figure 3. This toggle unit comprises a short link 62 which is pivoted to the lower end of arm I3 and a long link 64 which is pivoted to the right-hand end of link 62 and to a fixed bracket 66 (shown in dotted lines) on the base frame. At the juncture of links 62 and 64, an operating arm 68 is pivoted and extends downwardly with its lower end attached to an armature I0 of a solenoid unit having a solenoid 12. These elements are normally held in the position shown, but when solenoid 'I2 is energized, armature 'I0 is pulled down- Wa-rdly with link 64 swinging about its righthand end, and with the left-hand end of link 62 moving to the left and swinging the back wiper toward the apron. The amount of movement imparted to the back wiper by the energization of solenoid 'I2 (Figure 3) may be adjusted by changing the length of link 64. This movement is limited by a fixed stop 63 which prevents the back wiper from moving too closely to the apron.

Rotation is imparted to back wiper I in the manner shown best in Figures 2, 4 and 5, power being received from a motor 18 (Figure 2) through a speed-reduction unit 80. Referring to Figure 5, the power output shaft 8| of the speed-reduction unit 80 carries a sheave 82 which is drivingly connected through a V-belt 84 to a sheave 86. Sheave 86 is mounted upon and keyed to the hub of a gear 88 which is rotatably mounted by means of a double ball-bearing unit 89 on the end of shaft I I. Gear 88 meshes with a gear 90 keyed to the end of shaft I2. Power from motor 'I8 is thus transmitted through the gear-reduction unit 60, sheave 82, V-belt 84, sheave 86, and gears 86 and 90, to shaft I2. As shown best in Figure 4, this type of power-transmission unit does not interfere with the swinging movement of the back wiper shaft I2. For example, assuming that the back wiper is not rotating, the movement of the back wiper shaft I2 to the right (Figure 4) merely causes gear 90 to roll upon gear 88 a distance equal to the arc through which shaft |2 is swung. This causes a slight rotation of the back wiper which rotation has no harmful effect. If the back wiper is being rotated during such swinging movement, the only effect is a negligible momentary change in the speed of rotation.

The means for imparting movement to apron 4 is best shown in Figures 2 and 3, there being (Figure 3) a fast speed motor 92 and a slow speed motor 94 which are connected by means of a V- belt 96 which is carried by a sheave 98 on the shaft of motor 92 and a sheave |00 on the shaft of motor 94. The shaft 9| of motor 92 is mechanically connected at the left to a speed-reduction unit |02 which (see Figure 2) carries upon its power output shaft a gear |04 and a sheave |06. Gear |04 meshes with a gear |08 (Figures 2 and 3) which is keyed to the shaft |09 (Figure 3) carrying the top of apron 4 (Figure 1). Sheave |06 is connected by means of a V-belt II2 to a sheave |I4 which is keyed to (Figure 3) the shaft ||6 which carries front wiper I6. Motors 92 and 94 both rotate so as to turn shaft |09 counterclockwise, and shaft II6 clockwise. When motor 92 is operating, apron 4 is moved at a rapid rate and front wiper I6 is rotated rapidly so that fur is delivered to the scale hopper at a fast rate. When, as will be explained more in detail below, the `quantity of fur in the hopper approaches the desired amount, motor 92 is turned off and motor 94 is turned on. At this time, power from motor 94 is transmitted through sheave |00, V-belt 96 and sheave 98 to the shaft 9| of motor 92 and thence to shaft |09 of the apron and to shaft II6 of the front wiper. The slow speed of motor 94 causes apron 4 and front wiper I6 to move slowly, and fur is delivered to the scale hopper at a slow rate until the desired weight is reached. At this time motor 94 is deenergized, stopping the apron and the front wiper.

When the front wiper is being rotated rapidly, itimpels a considerable blast of air downwardly, and as shown in Figure 1. this blast of air is directed against the scale hopper. This blast of air upon the scale gives an artificial reading on the scale so that the scale tends to indicate that 76 there is more fur in the hopper than is present. This condition may be compensated for by adjustlng the scale, but nevertheless, it is especially objectionable when the amount of fur in the scale hopper approaches the desired quantity as the scale would tend to trip too soon with the result that a light-weight bat would be produced by the machine. The effect of this blast of air is reduced by providing at the left of the top of the scale hopper a grill-work I I8, through which the air readily escapes. As indicated above, baille 26 is of wire mesh and does not interfere with this flow of air. In addition to this, with the present apparatus, when fur is being delivered to the scale hopper at a slow rate, the rate of rotation of the front wiper is substantially reduced so that the effect of the blast of air is negligible. Thus, as indicated above, the front wiper is driven by motors 92 and 94, and at the time the speed of the apron is reduced, the speed of the front wiper is also reduced. In this manner, the effect of the blast of air from the front wiper upon the weighing mechanism is negligible during the time that the final amount of each quantity of fur is being delivered to the scale hopper.

Under some conditions of operation, it is quite important that the speed of apron 4 and front wiper I6 be reduced promptly when the approximate weight of fur is reached. This makes it possible to more accurately adjust the apparatus so that substantially all of the fur is delivered to the scale at the rapid rate and then only a very small quantity is delivered to the scale at the slow rate. In the present embodiment, motors 92 and 94 are three-phase motors, and when the drive is shifted from motor 92 to motor 94, motor 94 initially tends to act as a brake to reduce the speed of the apparatus to the synchronous speed of motor 94. Thus, the change from fast speed to slow speed is prompt and dependable, and the moving parts do not tend to coast. On the righthand end of motor 94 is a solenoid-operated brake unit 95 which is automatically released when the motors are started, and which is effective when the motors are turned off to immediately stop rotation, all in a manner more fully discussed below.

As indicated above, baille 26 (Figure 1) is raised to the broken-line position to stop the flow of fur to the weigher when the desired quantity of fur to form a bat has been delivered to the weigher. The baille is lifted to this position by an operating unit shown at the left of Figure 3. This operating unit is formed by a toggle having a pair of links |20 and |22 which are pivoted together and are connected to an operating arm |24 which carries at its lower end the armature |26 of a solenoid unit having a solenoid |28. The right-hand end of link |20 is pivoted to a fixed bracket |30 and the left-hand end of link |22 is pivoted to an operating lever |32. Operating lever |32 is fitted onto the end of a bar |34 which extends across the machine (see Figure 2) and rigidly carries the baille 26. Bar |34 is rockably mounted in a pair of bearing units |35 carried by the base frame, so that the baille may be swung as indicated in Figure 1 from the full-line position to the broken-line position.

When solenoid |28 (Figure 3) is not energized, the baille hangs vertically, and the members assume the position shown. During operation, when sufficient fur to form a bat has been delivered to hopper 20 of the weigher, solenoid |28 is energized so that armature |26 is drawn downwardly into the solenoid. This pulls operating arm |24 downwardly and swings links |20 and |22 toward their position of alignment. Thus, link |20 swings about its right end and the left end of link |22 is moved to the left, thereby swinging operating lever |32 and bar |34 counterclockwise. At the limit of movement of armature |26, links |20 and |22 are in substantial alignment and the baille is in its raised position. When solenoid |28 is deenergized, the baille is returned by gravity and carries the other elements to their respective positions.

Referring again to Figure 1, apron 4 is mounted at the top upon a roller |36 which is carried at its ends (see Figure 2) by a pair of bearing units |31 which receive the roller shaft. The bottom of apron 4 (Figure 1) is carried by a similar roller |38 which has a shaft |39, each end -of which is mounted in an adjustable bearing unit, shown in Figure 6 and indicated at |40. Bearing unit |40 is secured to an adjusting bracket |4| by four stud bolts |42, and adjusting bracket |4| is in turn mounted upon the hopper end wall by a pair of adjusting stud bolts I 43, each of which extends to the base frame through a slot |44 in the adjusting bracket. The roller shaft |39 extends through a slot |45 in the end wall of the hopper so that when stud bolts |43 are loosened, bracket |4| may be adjusted so that roller |38 is positioned to give the proper tension to apron 4.

In order to accurately and conveniently adjust the position of bracket |4|, an adjusting bolt |46 is provided. Adjusting bolt |46 has its upper end attached to the adjusting bracket by means of a pin |41 and has its lower end extending through a hole in a bracket |48 which is rigidly carried on the base frame. A nut |49 is threaded onto the adjusting bolt and is turned t pull the bolt and the adjusting bracket downwardly. This movement is against the tension of apron 4 so that the apron is tightened by the tightening of the nut. If the apron is too tight, nut |49 is loosened and the apron pulls the bracket upwardly to the proper position. When the proper tension is obtained upon the apron, set screws |43 are tightened and the roller |38 is thus held in the adjusted position.

The bottom of the hopper is provided with a hinged grating unit |50 (Figure 1) which collects foreign materials and permits small material to fall from the hopper; the grating unit may be opened to permit access to the bottom of the hopper. Fur is delivered to the hopper through a swinging door |52 which is hinged at its lower edge and which is provided at each end (see Figures 3 and 4) with a disc sector |53 to form side walls when the door is open. At each of its ends, the door is provided with a latch bar |54 which cooperates with a keeper |55 on the outer wall of the hopper. These latch bars normally hold the door in closed position as shown, and the latch bars may be lifted and the door swung to the position shown in broken lines in Figure 3. When in this open position, the door and the disc sectors |53 form a chute through which fur is delivered to the hopper.

As indicated in my copending application, under some circumstances it is desirable to hold the fur to the apron as the fur is delivered from the apron to the front wiper. Accordingly, as shown in Figure '1, above and to the left of back Wiper I0 and with their ends tensioned against apron 4 are resilient holding fingers I4. As shown in Figure 8, holding ngers |4 are of substantial width, and they are positioned to interiit with barbs 8 on apron 4, and thus tightly contact the layer of fur on the apron. Thus, as the layer of fur emerges from under the ends of the fingers, it is picked from the apron by the front wiper I6 and the individual hairs of the fur are thoroughly separated.

When desirable, additional means is provided for varying the rate of delivery of fur from the hopper to the weighing mechanism, and one such additional means is shown in Figure 9. In this embodiment, the apron structure is in the form of three apron sections 203, 204, and 206, and these apron sections are mounted to be moved independently. Thus, fur may be delivered to the weigher at a maximum rate by operating all three apron sections, and then fur may be delivered at a slower rate by stopping one or two of the apron sections. The apron sections are of different widths so that a wide variety of feeding rates are available.

The apron sections 203, 204 and 206 are carried at the top, respectively, by roller units 201, 208 and 209, and at the bottom each apron section is carried by a rotatably mounted roller unit (not shown). The central roller unit 208 is rigidly mounted upon shaft 2| 0 which is carried at the left by a ball-bearing unit 2|2 in a bracket 2|4, and at the right by a ball-bearing unit 2|8 in a bracket 2|8. The left-hand roller unit 201 is rotatably mounted on shaft 2|0 with its righthand end carried by a ball-bearing unit 220 and its left-hand end carried by a sleeve 222 upon a ball-bearing unit 224. Ball-bearing unit 224 is snugly tted onto the left-hand end of sleeve 222 and welded thereto is a gear 223 through which power is delivered to the roller assembly. When desired, gear 223 is clutched to shaft 2|0 by means of a clutch generally indicated at 226, and including an expansible unit 228 keyed to shaft 2|0 and extending into a recess in the side of gear 223. When the clutch is to be engaged, expansible unit 228 is expanded to cause the clutch lining 230 to engage the inner cylindrical surface of gear 223. This action is obtained by sliding an operating sleeve 232 to the right along shaft 2|0; the operating sleeve may then be slid to the left and the clutch automatically disengages so that shaft 2|0 is not connected to gear 223.

The right-hand roller unit 209 for apron section 206 is rotatably mounted on shaft 2|0 by means of a pair of ball-bearing units 234 and 236 with the right-hand end of the roller unit rigidly connected to a sleeve 238 which extends to the right through a ball-bearing unit 24| rigidly mounted on the base frame. The right-hand end of sleeve 238 carries a gear 240, with the gear and the roller unit forming an integral rotatable assembly. Gear 240 is selectively clutched to shaft 2 0 in a manner similar to that of gear 223, there being a clutch generally indicated at 242 having an expansible unit 244 keyed to shaft 2|0, a clutch lining 246, and an operating sleeve 243 slidable on the shaft. Expansible unit 244 extends into a recess in gear 240 so that when the expansible unit is expanded, the clutch lining 246 engages the internal surface of the gear. I'he operating sleeve 248 is slid to the left to cause the clutch to be engaged, and then it may be slid to the right to cause the clutch to be disengaged.

In this embodiment, the clutches 226 and 242 are individually operated by means of solenoid units (not shown), and power is delivered to the apron assembly through gear 223. When both clutches are engaged, all three of the apron sections are moved; the disengagement of clutch 242 stops only the right-hand apron section 206, whereas the disengagement of clutch 226 stops both of the apron sections 204 and 206. Apron section 203 is stopped by stopping gear 223. Thus, when rapid delivery of Tur is desired, all of the apron sections are operated, and when extremely slow delivery of fur is desired only the left-hand apron section 203 is operated.

When desired, power is transmitted to the apron sections from the right through gear 240 rather than through gear 223, and due to the fact that apron section 206 is wider than apron section 203, this changes the relationship between the different rates of feeding. When power is delivered to the assembly through gear 240, the right-hand apron section 206 provides the slow feed and an intermediate rate of feed is provided by running apron sections 204 and 206; this is done by engaging clutch 242 and disengaging clutch 226. Power is supplied to gears 223 and 240 from a variable speed motor and by changing the driving speed, and by combining the features of this embodiment with the features of the other embodiments, accurate and dependable fur feeding action is obtained under a wide variety of conditions of use.

'I'he electrical control circuit together with certain of the operating solenoids and certain portions of the air pressure system is shown in Figure 10. As pointed out above, this control circuit comprises a timed mechanism which coo-perates with a number of mechanically operated switches to produce a unied control for the entire fur supply and bat-forming mechanism.

This control correlates the action of: the means to move fur from the fur supply hopper to the weighing mechanism; the means to accurately weigh the fur into predetermined quantities; the means to separate the fur and convey it to the bat-forming tower; the means to move the perforated cones to and from the bat-forming tower where they have bats formed thereon; the suction and bat-wetting means associated with each of the perforated cones; and the cone flipper or inverting means for each of the cones. The control is such that the mechanism will continuously produce bats if it is permitted to operate without interruption, but the operator can stop the operation at any time, and when the mechanism is again started, no difiiculty is encountered as a result of the stopping. This last feature of permitting the operator to stop the operation is important in providing a practical working machine.

As has been indicated above, in the present embodiment, two cones are alternately positioned within the forming tower, and, as fur is being deposited on one cone to form a bat, the bat upon the other cone is being wetted and stripped from the cone. Fur is supplied to these two cones in a single forming tower from a single weighing, conveying and fur separating unit.

Accordingly, the control mechanism, diagrammatically shown in Figure l0, causes the fur conveying and separating and fur weighing mechanisms to operate continuously to supply the fur to the forming tower in separate quantities each of which is sufficient to form a bat; and alternate ones of these quantities of fur are delivered to each of the cones. Thus, the sequence of operation for the weighing, conveying, and separating mechanism and for the forming tower mechanism is repeated for each bat which is formed.

However, while the same steps are performed by the mechanism individual to each of the cones,

each cone is handled separately, and a complete cycle of operation for the mechanism associated with the cones is completed during the forming of two bats. Therefore, the control circuit is such that one portion of it completes a cycle of operation during a predetermined period of time while the other portion of the circuit completes its cycle of operation during two of these periods.

The apparatus is so controlled that a complete quantity of fur is being weighed and delivered to the conveyor during the time that a previously weighed quantity of fur is being deposited upon a cone. Provision is made for the operator to stop the automatic operation of any portion of the apparatus, and he can continue the manual control of the apparatus or he can make the automatic control operative again without danger of interfering with any of the steps of the operation.

Referring to the left-hand portion of Figure l0, the mechanism individually associated with cach of the cones is controlled by a double gang-switch 320 having two identical sets or gangs of switches. The switches of each gang are mechanically interconnected so that they operate together, and they normally remain in the open-switch position. Each gang of switches is provided with a solenoid which is energized to close the switches of that gang. When one gang of switches is closed, circuits are completed controlling the suction upon the cone in the forming tower, the wetting and inverting of the cone outside of the tower, and the mechanism which moves the cones to and from the tower. When the other gang of switches is closed, similar circuits are completed which cause the same operations to be carried on4 In the present description, where the two cones are provided with separate but identical sets of operating mechanisms, the identical parts are given the same number, but the elements of one set have the suiiix-I, and the elements of the other set have the suiiix-Z.

As shown in the lower right-hand portion of Figure 10, current is supplied to the control system from a three-phase, 22B-volt, 60-cycle source having busses 326, 328 and 329. Busses 326 and 328 supply control current and, accordingly, are extended along the four sides of Figure l0, with the various control units connected thereto. At the right of the gang switch 320 bus 326 is connected to a downwardly extending lead 35| to which are connected various of the operating units designated by the suffix-2. The operating solenoids for the two sides of gang-switch 320 are designated as 330-l and 330--2, respectively; one side of each solenoid is connected to a lead 332 which is in turn connected through a lead 334 to bus 328. The other side of solenoids 330-l and 330--2 are connected, respectively, to terminals 336-I and 336-2 of a switch 322; when armature 324 of switch 322 is in the position shown, terminal 336-! is connected to a terminal 33E-I and when the armature is in the reversed position, terminal 336-2 is connected to a terminal 33B-2. Terminals 338-I and 338-2 are both connected through a lead 340 extending to the right and downwardly to a lead 342 which extends to the left to a terminal 344 of a switch 346. Armature 348 of switch 346 is normally in its lower position as shown, and when in this position, it connects terminal 344 to a terminal 349 which is connected through a lead 350 to bvs 326. Thus, with switches 346 and 322 positioned as shown, the potential of bus 326 is carried through lead 350, switch 346, leads 342 and 340, and switch 322 to solenoid 33|l| In this manner, the lull voltage between busses 326 and 328 is impressed across solenoid 33|l| and the armature 352-I is held upwardly with the gang of switches at the left closed. The closing of switch 354-I completes an interlock circuit from bus 326 through lead 35S-I and lead 358 to lead 340. Thus, as will be explained below, even though armature 348 of switch 346 is raised, solenoid 330| remains energized until armature 324 of switch 322 is reversed; armature 324 is mechanically connected to the cone-transfer rack and is reversed at the end f each movement of the rack. Thus, armature 324 remains in the position shown until the cones are moved to the reversed position; at this time, the switch is reversed with the result that solenoid 330| is deenergized and solenoid 330-2 is energized.

As pointed out above in connection with Figure 1, the cones are swung to and from the forming tower by alternately supplying air to the transfer cylinders. Air is supplied to one of the cylinders through an air line, and this supply of air is controlled by a normally closed valve (not shown). This valve is turned to its position to supply air to the air line by the energization of a control solenoid unit shown at the left of Figure 10 and designated 366-|. One side of unit 36E-I is connected directly to bus 328 by a lead 368-L The other side of unit 366| is connected through a lead 364-1, a normally closed manual switch 362-I, a lead 36|-|, and a switch 360| and through lead 310 to a terminal 312 of switch 346.

Switch 346 is provided with a swinging armature 313 which is normally in its lower position, the same as is armature 348, and these armatures are lifted to their upper position by the energization of a solenoid 31|. Solenoid 31| has one side connected through a lead 369 to bus 328 and has its other side connected through lead 361, and a pair of door switches 365 and 363 to bus 326. Door switches 363 and 365 are normally open and they are positioned on the forming tower to be contacted and closed when both sets of the forming tower doors are fully opened. Accordingly, switch 363 is positioned to be engaged and closed by the left-hand door 20| (Figure 1) when the door reaches the extreme open position. Switch 365 is similarly positioned to be engaged by one of the doors on the other side of the forming tower. Thus, when both sets of doors are opened, both of switches 363 and 365 are closed and solenoid 31| is energized, thereby raising armatures 348 and 313.

Armature 313 is connected through a lead 315 to a terminal 311 of the suction timer switch 438. which. as will be more fully explained below, is provided with an armature which is raised a predetermined time after each cone-transfer operation. Armature 458 is connected through a lead 319 to a terminal 38| of a normally closed relay switch indicated at 383. Relay switch 383 is provided with two armatures 385 and 5|| which are normally held raised by the energization of solenoid 113, one side of which is connected through a lead 115 to bus 328 and the other side of which is connected through a lead 111, manual switches 119 and 18|, and lead 183 to bus 326. Thus, terminal 38| is normally connected through armature 385 directly to bus 326, and during operation, the raising of armature 313 of switch 346 connects bus 326 through armature 385, terminal 38|, lead 319, armature 458, terminal 311, lead 315, armature 313, terminal 312, lead 310, switch S60-I, lead 36|-|, switch 362| and lead 364| to solenoid unit 366|. Thus, when the bat has been removed from the cone outside the tower and a new bat has been formed on the cone inside the tower, the forming tower doors are opened, closing switches 363 and 365 and raising the armatures of switch 346, and the full line voltage between busses 326 and 328 is impressed across solenoid unit 36E-l. This operates the air control valve so that air is supplied through the air line to the transfer cylinder and the cones are transferred in the manner outlined above.

Manual switch 119 is moved under some circumstances by the operator to the vertical position or to the right into engagement with terminal 195, and this ofpens the connection from lead 111 through switch 119 and switch 18| to lead 183. Accordingly, switch 346 is provided with a pair of interlock terminals 189 and 181 which are engaged by armature 348 when the armature is in the raised position. Terminal 189 is connected through a lead 19| to lead 111 and terminal 181 is connected through a lead 185 to switch 18|. Thus, when the doors are opened, and the transfer operation has started, the circuit from bus 326 through switch 18| to lead 111 and solenoid 113 is not broken by the opening of switch 119.

The automatic control circuit for solenoid unit 36E-I may be disconnected by moving switch 362-I to the center vertical position. The solenoid unit may then be energized by moving switch 362| to the left against contact 314| which is directly connected through a lead 316| to bus 326.

The control of the water to the spray is maintained by a valve control unit which opens the water valve when air is supplied through an air line. The supply of air to the air line is controlled by a spray solenoid unit 380| which when energized, opens the air valve, and when deenergized, closes the air valve and opens the air line to exhaust. One side of control unit 38|l-I is connected through a lead 382| directly to bus 328; the other side of the control unit is connected through lead 384|, switch 381-l, lead 389|, switch 386-|, and lead 388 to terminal 398 of a spray timer switch generally indicated at 392.

With switch 392 in the position shown, its armature 394 contacts terminal 398 and connects it through lead 396 to terminal 398 of relay switch 383 which has its armature 385 connected to bus 326. When armature 385 is in its normally raised position, it engages terminal 398 and the potential of bus 326 is carried through armature 385, terminal 398, lead 396, armature 394, terminal 390, to lead 388, and when switch 38E-I is closed, to lead 389-4, and through switch 381| and lead 384-| to the spray control unit 38u-l. Thus, with the switches in the positions shown, the full potential between busses 326 and 328 is impressed across spray control unit S88-l and water is supplied to the spray nozzle.

The spray timer switch 392 starts its timing operation when the doors are closed, and at the beginning of the timing operation, armature 394 is in the position shown. When the timing operation is completed, the armature is lifted and the armature is held in this raised position until the next cone-transfer operation takes place. At this time, the armature is immediately dropped so that the timer switch may be imtransfer operation which reverses armature 324 to thereby deenergize solenoid S30-I, with the result that the gang of switches 352-| is dropped. Shortly thereafter, the doors are reclosed, with the result that armature 348 of switch 346 is dropped to again connect lead 342 eration and is again energized or recycled when the doors are closed.

This operating mechanism is so adjusted that after energization, armature 394 remains in the position shown for a as six seconds, and at the end of this period,

of which time, armature 394 is lifted breaking the circuit of solenoid S80-I.

When a bat is removed from the forming tower, it is sprayed, and during the early part 4202 is connected to bus 328 through lead 334. The other side control unit 420-2 is connected through a lead CE2-2 to switch 444-L Switches 444`| and 444-2 are connected ihrou'fh a lead 446 to bus 326 and thus, when the left-hand gang of switch 328 is closed, the :ight-hand suction-control unit 420-2 is held energized and suction is continually maintained upon the right-hand cone which is then within the forming tower. Similarly, when the righthand gang of switch 320 is closed, the lefthand suction-control unit 420-l is held enercontrolled by the switch Accordingly, lead 442-1 is connected through a lead 44|-| and a switch unit 428-1 of switch 422 to bus 326, and in a like manner, lead 442-2 is connected through a lead 44l-2 and a switch unit 428-2 to bus 326. Thus, when the armature 434 of switch 422 is in the lower position shown, both suction units are connected to bus 326 regardless of the closing of the two gangs of switches of switch 320, and when the armature 434 of switch 422 is raised, suction is maintained only on the cone within the forming tower.

Armature 434 of switch 422 is raised by the energization of solenoid 436 which has one side timer switch is raised, a connection is made through lead 319 and relay switch 383 to bus 326. Suction timer switch 438 is provided with a cycling operating mechanism 462 which is similar to and is connected in parallel with the corresponding operating mechanism 4|0 of spray timer switch 392, and thus, the suction timer switch starts its timing cycle simultaneously with the starting 319, armature 458, ture 313, terminal 45|, and lead 450 to solenoid 436. This energizes solenoid 436 and lifts armature 434, and due to the fact that switch 444-2 is open,

when the bat has been removed from the cone, and the doors are reopened so that the cones can be transferred, the armature 313 of switch 346 is raised in the manner explained above, so that the circuit of solenoid 436 is broken and armature 434 falls immediately to again energize the suction control unit 420-|. In this manner, the suction within the cone is permitted to build up during the time that the cone is being moved into the forming tower and when the doors are reclosed, there is suicient suction on the cone to immediately draw the falling fur to the cone.

a predetermined period This predetermined period of time is regulated by adjusting the suction timer switch 438 which is energized at the time the spraying operation is started. Thus, accurate and reliable control is maintained upon the suction at all times and the apparatus is readily adaptable for efcient operation under a wide variety of conditions.

Under some circumstances, it is desirable to hold the suction from the cone while the cone is being moved into the forming tower. That is, for example, there are times when the suction builds up rapidly enough to cause a draft of air which deposited onto a dry cone, the fur tends to form Accordingly, in this embodiment, lead 450 is connected to lead 315 by a manual switch 193, and when this manual switch is closed, it bypasses the circuit from lead 315 through armature 313 and terminal Thus, when the doors are closed and armature 313 is raised, the circuit of solenoid 436 is not broken and the solenoid remains energized. In this manner, armature 434 is held in the raised position and suction is not returned to the cone. At the end of the transfer operation, the suction timer switch 438 is recycled and its armature 458 is dropped. This opens the circuit of solenoid 435 and the suction is immediately returned to the cone.

After the spraying operation has been completed, the cone is automatically inverted so that the bat may be stripped therefrom. This invertingr operation is accomplished by supplying air to a vertical cylinder through an air line the construction of which is explained in my copending application. The supply of air to this air line is controlled by a flipper ing one side connected through a lead 410-| to bus 328, and the other side connected through a lead 412-I, a manual switch 414| and a lead 416| to a switch 418| of the gang 352-l. The other side of switch 418-| is connected through a lead 480 extending to the right to a terminal 482 of a solenoid switch 484.

Solenoid switch 484 is provided with an armature 488 which is connected to a lead and which is moved to its upper position into engagement with terminal 482 by the energization of solenoid 405 which has one side connected to bus 328 through a lead 498. The other side of solenoid 485 is connected by leads 500 and 50| to a terminal 492 of a switch 393 which is provided with two armatures 395 and 391, and these armatures are lifted upon the energization of a solenoid 400. Solenoid 400 has one side connected through lead 498 to bus 328 and has its other side connected through a downwardly extending lead 502 to the lower terminal 504 of the suction timer switch 438. The armature 458 engages terminal 504 at the beginning of each timing cycle, and during this time, the terminal 504 is connected through armature 458, lead 319 and relay switch 383 to bus 326. Thus, during the initial period of each of the timing cycles of the suction timer switch, solenoid 400 is connected through the suction timer switch to bus 326 and the armatures of switch 393 are raised. When in the raised position, armature 395 bridges a pair of interlock terminals 40| and 403 and thereby connects lead 502 to lead 5|2. Lead 5|2 is connected through a pair of normally closed pressure switches 508| and 508-2 to a lead 5|0 which extends to the left where it is connected through switch unit 5|| of relay switch 383 to bus 328. Thus, when armature 395 is raised at the beginning of a cycle of operations by the dropping of armature 458, an interlock circuit is formed through terminal 40|, armature 395, terminal 403, and thus through lead 5|2, the pressure switches 50S-I and 508-2, lead 5| 0 and switch unit 5|| to bus 326. Therefore, when the suction timing operation is completed and armasolenoid unit 4GB-I havture 458 is raised, solenoid 400 remains energized as long as the interlock circuit is not interrupted.

When in the raised position, armature 391 connects lead 50| through terminal 492 to terminal 493 which is connected through a lead 495 to terminal 491 of the spray timer switch 392. As explained above, when the spraying operation is completed, armature 394 of the spray timer switch is raised, and when in the raised position, armature 394 connects terminal 491 to lead 396 and thus through relay switch 383 to bus 326. In this manner, at the end of the spraying operation, bus 326 is connected through switch 383, lead 396, timer switch 392, lead 495, switch 393, leads 50| and 500 to solenoid 485 with the result that solenoid 485 is energized. The energization of solenoid 485 raises armature 486 and completes the connection from lead 50| through switch 484, lead 480, switch 418-I, lead 41E-l, switch 414| and lead 412| to the flipper unit 46S-I. The energization of unit 468-| causes air to be delivered to the air cylinder of the flipper mechanism and the cone is moved to its inverted position at the flipper station.

Pressure switch 508| is connected to the air cylinder of the flipper mechanism which has its air supply controlled by the left-hand flipper contro] unit 488-I, and similarly, pressure switch 508--2 is connected to the air cylinder of the right-hand flipper mechanism, all in a manner pointed out in my copending application. When the flipper operation is being carried on, the pressure in the cylinder does not rise to the full air line pressure, but when the mechanism reaches the limit of its movement, the air pressure gradually rises and during this time, the operator removes the bat from the cone. Pressure switches 508| and 508-2 are so adjusted that they normally remain closed, but each of them opens when the pressure in its air line reaches the value of seventy pounds per square inch. Thus,

inch, switch 508| snaps to the open position, and this breaks the interlock circuit to solenoid 400. Accordingly, the solenoid is deenergized and the armatures 391 and 395 drop.

The dropping of armature 391 opens the circuit to the flipper control unit 4GB-I and this shuts off the air to the flipper-operating mechanism. The flipper operating mechanism automatically moves by gravity back to its lower position returning the cone to its position at the side of the forming tower, and pressure switch 508-| closes when the pressure within the cylinder reaches substantially atmospheric pressure. Thus, the interlock circuit is conditioned so that during the next cycle of operations it will be effective to maintain solenoid 400 energized.

When the operator is removing the bat from the cone and, for some reason, he desires to hold position for an extended through lead 183, switch 18|, switch 119, and a Thus, even though the pressure switch is opened to thereby open switch 393 and break the normal flipper circuit, the

cone may also be held in the raised position, or it may be moved to the raised position, by moving the armature of switch 414-i to the left into contact with terminal 413-1 This connects solenoid unit 468-| directly to bus 326 through lead 415-I, and maintains air pressure in the flipper cylinder regardless of the condition of the remainder of the circuit.

As has been pointed out above, fur is delivered to the weighing mechanism at a rapid rate during the delivery of the major portion of each quantity of fur to form a bat. However, as the amount of fur in the scale hopper approaches the proper weight, the rate of delivery of fur is slowed down and accurate and dependable weighing is acccomplished. In the embodiment of Figures 1 to 6, the slowing down of the rate of delivery of fur is accomplished by moving the back wiper toward the apron and the apron is slowed down, and as a result, a thinner layer of fur is moved to the front wiper at a slower rate. The accuracy of weighing is further facilitated by reducing the speed of rotation of the front wiper to thereby render negligible the effect upon the scale of the blast of air from the front wiper. Thus, the fur from the front wiper slowly settles into the hopper, and the scale arm approaches the balanced condition. The fur has negligible momentum, and when the force of the blast of air is negligible, the possibility of an error in weighing is very small.

The back wiper is moved toward the apron in the manner outlined above in connection with Figure 3 by the energization of a solenoid unit 12 which, as shown at the right of Figure l0, has one side connected through a lead 160 to bus 328 and which has its other side connected through a normally open switch unit 162 and a lead 164 to bus 326. Switch unit 162 is a part of solenoid switch 166 and switch 166 is provided with a solenoid 168 which has one side connected through a lead 110 to bus 328. The other side of solenoid 168 is connected through a lead 112 to a magnetically operated sealed: switch 114 the other side of which is connected through a lead 564, a switch unit 515 and a lead 519 to bus 326. Switch unit 515 remains closed when fur is being delivered to the hopper, and as the amount of fur within the hopper approaches the desired quantity, the initial movement of the scale arm moves the magnetic armature of switch 114 to thereby close switch 114 and connect solenoid 168 to bus 326. This closes switch 162 and energizes solenoid unit 12, with the result that the back wiper is moved to its position near the apron.

As indicated above, the change in the rate of movement of the apron and the rate of rotation of the front wiper is accomplished by changing the drive from a fast speed motor 92 to a slow speed motor 94. These motors are shown at the right of Figure with motor 92 connected to bus 328 by a lead 540 and motor 94 connected to bus 32B by a lead 542. A solenoid switch 544 controls the connecting of the two motors to the other two busses, and switch 544 is provided with two armatures 553 and 554 and with a solenoid 556. When solenoid 556 is deenergized, armatures 553 and 554 engage terminals 55| and 552, respectively, which are connected through leads to the proper terminals of motor 92. Armature 554 is connected through a lead 510 to a normally closed switch unit 516 of a solenoid switch 514, and in a like manner, armature 553 is connected through a lead 569 to a normally closed switch unit 515 of solenoid switch 514. The other side of switch 516 is connected through a lead 580 to bus 329, and the other side of switch 515 is connected through a lead 519 to bus 326.

In this way, when the switch units 515 and 516 are in their normal closed positions, busses 326 and 329 are connected to switch 544, and when the armatures of switch 544 are positioned as shown, motor 92 is operated. Later, when solenoid 544 is energized, the armatures are raised and motor 94 is operated. Solenoid 556 of switch 544 is connected at one side through a lead 538 to bus 328, and at the other side through a lead 560 to a magnetically operated sealed switch 562. The other side of switch 562 is connected to lead 564 which, as indicated above, is connected through switch unit 515, and lead 519 to bus 326. As previously pointed out, the initial movement of the scale arm toward the balanced position closes switch 114 and this moves the back wiper toward the apron. Upon continued movement of the scale arm, the magnet of switch 562 is moved to close switch 562, and this energizes solenoid 556 which raises the armatures 553 and 554 and changes the drive from motor 92 to motor 94.

As indicated above, motors 92 and 94 drive the apron and the front wiper, and the front wiper picks the fur from the apron so that the individual hairs fall down to the scale hopper. Switches 562 and 114 and their operating magnets are so related that the change in the front Wiper and apron drive from fast speed to slow speed takes place approximately one and one-half seconds after the back wiper has been moved toward the apron. Thus, at the time of the reduct-ion in speed of the front wiper, the thicker layer of fur has been picked from the apron and the thin layer of fur is then presented to the front wiper. The layer of fur of reduced thickness is thoroughly separated by the front wiper and this is carried on until thc amount of fur in the scale hopper reaches the exact weight.

As explained above in connection with Figure 1, when the quantity of fur in the hopper reaches the desired weight, a bracket 964 on the scale arm 2| intercepts a beam of light from spot-light 962, and the photo-electric rela-y unit I9 is thereby rendered effective. Referring to Figure 10, photoelectric relay unit I9 has one side connected to bus 326, and has its other side connected through a lead 894 to solenoid 599 of switch 514. The other side of solenoid 590 is connected through a lead 802 to bus 328, and the closing of the photoelectric relay I9 energizes solenoid 590 and raises the armatures of switch 514. As a result, switch units 515 and 51's` are opened to thereby break the circuits of the motors 92 and 94. As explained above, at this time in the feeding operation, solenoid 556 of switch 544 is energized and the apron and the back wiper are being driven ty the slow speed motor 94. and when switch units 515 and 516 are opened, this feeding operation is immediately stopped. The opening of switch unit 515 opens the circuits through lead 564 to switches 562 and 114, so that solenoids 556 and 168 of switches 544 and 166, respectively, are deenergized. Thus, switch 544 is conditioned to deliver power to the fast speed motor 92 when the feeding operation is restarted, and the back wiper i0 is moved away from apron 4.

As explained above "n connection with Figure 3. to insure that the feeding operation will stop immediately when motor 94 is disconnected, an automatically operating brake unit is provided upon the shaft of motor 94. Brake unit 95 is schematically shown as having a brake drum 966 upon the motor shaft which is gripped by a pair of brake shoes 968 with the shoes pressed against the brake drum by a pair of springs (not shown). A cam lever 910 is provided with a cam portion extending between the ends of the brake shoes, and when the cam lever is moved down, the cam portion moves the brake shoes away from the brake drum. Attached to the left-hand end of cam lever 916 is an operating armature 912 which is pulled down to release the brake by the energization of a solenoid 914. One side f solenoid 914 is connected by a lead 916 to lead 510 and the other side is connected through a lead 918 to lead 569. As explained above, both motors derive power for their operation through leads 510 and 569 which connect switches 516 and 515, respectively, to armatures 554 and 553 of switch 544. The feeding operation is stopped by the opening of switches 516 and 515 to thereby disconnect leads 510 and 569 from their busses; the feeding operation is restarted by the closing of switches 516 and 515. Thus, whenever either of motors 92 or 94 is to operate, line potential is across leads 510 and 569, and this energizes solenoid 914 to release the brake unit 95. When both of the motors are turned off solenoid 914 is deenergized and the brake is engaged to immediately stop the motors and prevent coasting movement of apron 4 and front wiper 16.

The lifting of the armatures of switch 514 also closes a switch unit 806 which has one side connected through lead 519 to bus 326, and which has its other side connected through a lead 810 to a baille-operating unit 812, the other side of which is connected through lead 814 to bus 328. Baie-operating unit 812 is effective when energized to raise baille 26 (Figure l) to the brokenline position. Thus, simultaneously with the stopping of the feeding operation, baille 26 is raised to immediately "cut off" the supply of fur to the scale hopper. The raising of the armatures of switch 514 also closes a switch unit 816 which is connected through a lead 652 to a scaleopening solenoid unit 646, the other side of which is connected through a normally closed manual switch 650 to bus 328. At the left, switch unit 816 is connected through a lead 656 and an upwardly extending lead 818 to a switch unit 640 of the cyclic timing mechanism indicated at 609.

This cyclic timing mechanism normally completes a cycle While one quantity of fur is being weighed and another quantity of fur is being deposited upon a cone. At the left, a constantspeed motor 611) is connected through a speed reduction mechanism to a shaft 612 carrying six cams. Each of these cams is positioned to engage and close a normally open switch for a predetermined period of time, at a particular point in the cycle of operation; the cams are designated 622, 624, 626, 628, 630, and 632, and they operate switches 634, 638, 636, 640, 642, and 644 respectively.

At the left of the motor 610 upon a shaft 615 is mounted a brake 614 which prevents rotation of the motor except when the brake solenoid 616 is energized. Solenoid 616 is connected across the input leads 618 and 620 of motor 610 and is energized to release the brake when the motor is started. Shaft 612 rotates at the rate of one revolution every twenty-seven seconds, and the various switches are opened and closed by their respective cams for varying portions of this time, to complete a cycle in a manner more fully pointed out below. It should be noted, however, that the period of time necessary to complete the steps which occur during one cycle depends upon the conditions under which the apparatus is used, and particularly upon the time necessary to deposit a single quantity of fur on a cone in the forming tower, and the length of time necessary to weigh a quantity of fur. Accordingly, the rate of rotation of shaft 612 and the contours of the various cams are varied depending upon the conditions of use.

Under normal conditions of operation, immediately after the proper quantity of fur has been delivered to the hopper, as indicated by the closing of switch unit 816, cam 628 engages and closes switch 640 to thereby complete a circuit to bus 326 from lead 818 through lead 658, terminal 820 of a relay switch 822, a normally raised armature 824 of the switch, and a lead 826 to bus 326. This carries the potential of bus 326 through lead 826, switch 822, lead 658, switch 640, lead 818, switch unit 816, and lead 652 to solenoid 646, and the other side of the solenoid is connected through switch 650 to bus 328. This energizes solenoid unit 646 to thereby open the bottom-dumping mechanism of the scale hopper and dump the fur.

After the bottom-dumping mechanism of the hopper has been opened, and the fur falls on endless belt 24, the bottom of the hopper is closed again by the energization of scale-closing solenoid unit 682. One side of solenoid unit 682 is connected through lead 648 and switch 650 to bus 328, and the other side is connected through lead 684, switch 642 and lead 686 to lead 658, and thus through relay switch 822 and lead 826 to bus 326. Accordingly, during normal operation, at an interval of three seconds after the closing of switch 640, cam 630 engages and momentarily closes switch 642 to thereby close the bottom-dumping mechanism so that the scale hopper may receive fur again.

After the proper quantity of fur has been delivered to the hopper, thereby closing photo-electric relay 19 and energizing solenoid 590 of switch 514, the photo-electric relay is apt to reopen due to the swinging of the scale arm 21, as when the fur falls from the hopper, before the closing of the bottom-dumping mechanism. However, it is important that baille 26 be held in its raised position (the broken-line position of Figure l) to deect fur from the top of the hopper, and that the feeding mechanism remain stationary until the bottom-dumping mechanism is closed so that the hopper may receive fur. Otherwise, the restarting of the feeding operation would result in the delivery of fur through the hopper without being weighed. Accordingly, simultaneously with the closing of switch 640 by cam 628, switch 644 is closed by cam 632 to completel an interlock circuit around the photo-electric relay unit 19, and this interlock circuit maintains solenoid 590 energized even though the circuit of the relay unit 19 is opened. This interlock circuit extends from .bus 326 through lead 826, armature 824, terminal 820, lead 658, switch 640, lead 818, lead 656, switch unit 816, lead 652, switch 644 and lead 680 to solenoid 5911. This interlock circuit is held until cams 628 and 632 simultaneously move away from their switches 648 and 644, which is at the time of the closing of the hopper by the solenoid unit 682.

After the dumping operation, the scale hopper contains no fur and therefore, the hopper 20 is immediately raised so that the scale arm 21 moves downwardly, and the beam of light from spot-light 962 again plays upon the photo-electric cell so that photo-electric relay unit 19 disconnects lead 604

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