US2444553A - Singeing apparatus and method - Google Patents

Description

July 6, 1948. R. R. CONE SINGEING' APPARATUS AND METHOD 7 Sheets-Sheet 1 Filed Julyl, 1946 Richard R. Cone 7 Sheets-Sheet 2 Filed July 1, 1946 Richard R. Conearwa/wtm.

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f m: .r I dv: =2 l E 3 mm nm E R Q? T o: I v E (K a mm 3 o I T m9 rm9 m2 mm mm 09 R M9 22 m9 a BR 3k 19 Richard R. Cone" R. R. CONE SINGEING APPARATUS AND METHOD July 6, 1948.

7 Sheets-Sheet 4 Filed July 1, 1946 Richard R. Cone gvwa/wfm.

M 6, 4948. R. R E 2,444,553

SINGEING APPARATUS AND METHOD July 6 1948. R CONE 2,444,553

SI-NGEING APPARATUS AND METHOD Filed July 1, 1946 7 Sheets-Sheet- 6 Richard R. Gon

July 6, 1948. R. R. com:

SINGEING APPARATUS AND METHOD 7 Sheets-Sheet 7 Filed July 1, 1946 Richard R. Cone Elmo/Mm.

Patented July 6, 1948 ITED STATES AT NT OFFICE 2,444,553 SINGEING APPARATUS AND METHOD I Application July 1, 1946, Serial No. 680,599

12 Claims.

This invention relates to a singeing apparatus for singeing yarn, cloth, and the like and is especially adapted for the singeing of yarn, in that, the singeing flame is adapted to penetrate between the yarn and singe all portions thereof.

The invention comprises a conventional creel having drop wires through which the ends of yarn are passed and said ends are passed through a suitable reed and across a set of burners, and then it is carried onto another set of burners spaced some distance away from the first set of burners, after which it passes over a roller and is reversely directed beneath the last burner unit and is wound onto a suitable warp beam in the form of a chain warp. Means are also rovided for automatically stopping the entire apparatus when an end in the yarn breaks and upon stoppage of the machine, the supply of fuel, such as gas, is automatically cut off to the two burner units and compressed fluid is blown across the burners to automatically extinguish any flame, which may remain due to the deposit of lint and the like, or residual gas.

It is an object of this invention to provide a singeing apparatus having two spaced sets of singeing burners across which the warp is directed together with means for automatically stopping the machine, when an end breaks or when the forward speed of the warp is not suiiicient to prevent its being burned by the burners across which it is directed, together with means for automatically stopping the flow of fuel to the burners upon stoppage of the warp together with means for blowing compressed air across the burners to extinguish any remaining flame, which might be present on the burners, and thus to prevent burning of any of the warp ends.

It is another object of this invention to provide in a singeing machine a pair of singeing devices disposed in spaced relation to each other, and in which means are provided for automatically extinguishing the flames in the singeing apparatus, when the forward speed of the warp threads across the singeing devices falls below a predetermined rate of speed, together with means for automatically igniting both of the singeing devices upon starting of the singeing operation and having means for automatically cutting off the fuel to the second singeing device after it has run a predetermined time so as to singe that portion of the warp disposed between the two singeing devices which has not been properly singed by the first singeing device upon stoppage of the machine.

Some of the objects of the invention having 40 are indicated at H.

(or. 2s--ss) been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawings, in which:

Figure 1A is a plan view of the second or s rearmost singeing apparatus;

Figure 1B is a plan view of the forward or first singeing apparatus through which the yarn passes before it reaches the second singeing apparatus;

Figure 2A is a side elevation of Figure 1A,

looking from the lower side of Figure 1A, and showing schematic wiring in association therewith;

Figure 2B is a side elevation of the structure shown in Figure 1B, and looking from the lower side of Figure 1B and showing some of the wires in schematic form;

Figure 3 is a side elevation looking at the other side of Figure 2B;

Figure 4 is a vertical sectional view on an enlarged scale of one of the creel drop wire units, shown in elevation immediately to the right of Figure 4 in Figure 3;

Figure 5 is a cross sectional view taken along the line 5-5 in Figure 1A;

Figure 6 is an elevation looking from along the line 6-6 in Figure 1A, with central portions of the apparatus being broken away;

Figure 7 is a schematic wiring diagram associated with the rearmost burner and associated parts;

Figure 8 is a schematic wiring diagram of a portion of the creel and the warper mechanism. Referring more specifically to Figures 3 and 4 of the drawings, the numeral Ill indicates the front portion of a conventional creel having a plurality of drop wire mechanisms located therein, there being a drop wire mechanism for each of the strands coming from the creel. The strands The front portion of the creel l0 comprises a plurality of vertically disposed posts l2, having a plurality of insulating blocks, such as wooden blocks l3, secured transversely thereacross by any suitable means, such as bolts Ill. The bolts M penetrate suitable angle brackets l5, which are secured to a transverse angle iron It by any suitable means, such as a bolt 11.

Supported by blocks I3 is a transverse metallic bar 18, in which a plurality of eyelets H! are mounted, said eyelets being preferably of porcelain or some other insulating material, and there being an eyelet for each of the strands of yarn II, There is also another insulating block, such as a wooden block 20, associated with each block I3 and between blocks 20 and I3 is mounted a strap member 2 I, which extends downwardly, and these strap members 2i, have secured thereto as by means of a bolt 22, a metallic bar 23. There is also mounted in block 20 a transverserod 24 over which the strands of yarn l I pass. Mounted for up anddown movement on the metallic bar 23 is a drop wire 26, which has its upper end in the form of a circle and clampingly holding an insulating eyelet a strand of yarn H passes.

7 It is thus seen that the fixed eyelets l9 and the transverse rod 24 support the strands of yarn I l and thus hold the eyelet 27 in elevated position as long as the strand is not parted. The wire 25 extends downwardly and it encircles the metallic bar 23, and has a horizontally projecting tail 28, which is adapted to fall onto a metallic rod 29, when a strand of yarn ll supporting a drop wire 26 and an eyelet 21 parts and allows the horizontalportion 28 to engage both the bar 23 andthe metallic rod 29.

Secured to the bolt22, which is electrically connected to bar 23, is a wire 39, allof these wires 36 being joined to a common wire 31, which isconnected to one side of solenoid coil 32, having 'a' solenoid core 33. To the other side of the solenoid coil 32 is connected a wire 34.

Wire 34 is connected to one side of a coil 35 oi a reducing-transformer 36. From the other side "of "coil 35 a common wire 37 is led to a lead 40 for each horizontal row of eyelets 21, and this wire 40 isconnected to the metallic bar 29. -The transfonmer 36 has another coil 4!, which is connected to a suitable source of power by wires 39 and 39a having therein a switch 42 for cutting onand off the power to the transformer 36.

A conventional warper is indicated at 45, and this is a conventional design having a bar 48 over which the strands H are passed through a reed 41,-where they are formed into a sheet to be passedacross the two singeing units. The warper is also equipped with a reed 43 through which the sheet of warp passes. This warper is of! conventional design and only portions thereof will be described; The warper is driven from an overhead pulley 48 driven by a suitable source of power, and on which is mounted a belt'49, which engages either a tight pulley 44 or a loose pulley 59 mounted on a shaft 51. This shaft base. pinion 52 thereon, which meshes fth a pinion 53 mounted on a shaft 54, which projects through the machine.

on shaft 54 is disposed an elliptical cam 56, which is adapted to oscillate a lever 51, pivoted for oscillation, asat 58, To the free end of this leyer'5B is pivotally secured a link 60, and oscillation of lever 51, will cause up and down movemerit oflink 96. j Link Gil passes through a guide Bl secured on the. sideof the machine, and has a shoulder 62 on one side thereof. Its upper end is adapted to engage a projection 63 dis-posed on a link 64, which is pivoted to the free end of a lever 65 mounted on an oscillatable shaft 86, which ordinarily is employed in the stop motion mechanism, but in the present instance, this stopv motion mechanism is eliminated, as it is unnecessary.

The right hand end of the solenoid core in Figure 3 is pivotally secured to the lower end of link 64. Pivoted for oscillation, as at 67, is a foot lever ,68, having secured thereto and intermediate its end, as at169, a sliding link"). This link project'supwardly and has its upper end shoul- 21 therein and through which.

dered, as at H, and is supported by a guide 12 secured on the side of the wa'rper frame. Pivotally mounted on the side of the war-per frame,

at '33, is a bell crank lever '14 having a forwardly projecting portion 15, which projects forwardly and towards the observer in Figure 3 alongside the left hand edge of the upper end of link 10.

When a drop wire falls in one of the drop wire switches previously described and shown in detail in Figure 4, the solenoid coil 32 will be energized .to move the solenoid core 33 to the left in Figure 3. This will cause the shoulder 62 on its downward movement to engage the right hand end of hell crank 74, which will pivot its upper end to the right or pivot the bell crank 14 in a clockwise manner in Figure 3, which will move the link 70 in a clockwise manner in Figure 3 and cause its shoulder to be removed from beneath the left hand side of the looped guide 12, and since shaft 61 has a plurality of weighted levers thereon, not shown, this will cause the foot lever 68 to move in a counter-clockwise direction in Figure 3 to raise link 79 and this will allow oscillation of shaft 61 in a counter-clockwise manner in Figure 3, and shaft 61 has conventional belt shifting means thereon, not shown, which will shift the belt 49 to the loose pulley 59 on shaft 5! and stop the machine.

Shaft 54 has also secured thereon a sprocket Wheel or pulley 89 on which is mounted a sprocket chain or pulley belt 85, which projects forwardly to a point between the two singeing devices and is mounted on a sprocket wheel or pulley 82 secured on one of the rollers 83 of a ball warp roll holder. This warp roll holder has end portions 84 and 85 in which there is also mounted another roll 86 and one of the housings 34 or 85 has conventional gearing mechanism therein, not shown, which connect rollers 83 and 89 together so as to cause their top surfaces to run in the same direction and on which is adapted to rest a warp beam 87, onto which the ball of warp is adapted to be wound. Also the housings 84 and 95 have mounted therein a reverse screw cam shaft 83 and suitably driven by the gearing in one of the housings 84- or 85 and on which is mounted for back and forth travel a guide member 89, having an eye90 therein through which the warp in rope form is adapted to be guided onto the warp beam 81.

The two singeing devices will be referred to as the first singeing device, andthe second singeing device. These two singeing devices are identical in structure, except that they are reversed as to position, that is, the second singeing apparatus is identical to the first singeing apparatus, ex- .cept that its position is turned 180, and therefore, a description of one will refer to the other with the prime notation added to the parts of the second singeing apparatus.

The singeing apparatusis supported by four vertically disposed pipes 9|, which are secured to the floor of the building by a suitable flanged pipe fitting92, which aresuitably secured to the floor by screws and is of conventional design. The upper ends of these pipes 9| have substantially semi-circular cuff members mounted thereon for supporting the horizontal side portions of the singeing apparatus.

The singeing apparatus comprises a plurality of transversely disposed spaced pipes 93, 94, and 96, the pipes 93, 94 and 95 having secured on the ends thereof suitable Ts 91, 98, 99, which are joined together by nipples I09. The Ts 99 have secured'thereto nipples IIII, which-have Venturi, the other end of the venturi I04 being connected to a suitable air mixing valve I05. Monuted in the ends of the portion I are suitable rotatable air inlets 506; the venturi and the air inlets being conventional.

Secured to the portions 0f the venturi I04 and projecting downwardly are nipples I01, which have elbows I00 therein, and connected to elbows I08 .are nipples I09, which are connected to a solenoid valve II Il n'ormallyheld in open position during operation of the entire apparatus, and upon .de-energization of the machine, the valve IIO moves to closed position, from which suitable wires, to. be presently described, are led. Connected to the other side of the solenoid valves I I0 is a nipple III, which; is connected to a T H2 and T H2 is connected by a pipe II3 to a T II4. Connected to the T's II2 are nipples II5 to which a manually operable valve I I6 is connected which has a pipe I I1 leading therefrom and which is led beneath each end of the pipes 93 to 96 inclusive. Each of the pipes II! have Ts II8 therein to which are connected pilot light pipes I20, which are directed upwardly and then over to where theiropen ends are in close proximity to a perforated conventional ribbon I2I disposed ineach of the pipes 93 to 36 inclusive and through which the gas escapes, there being a small quan tity of gas passing through pipes .I at all times to maintain arpilot light at each end of the perforated ribbons I2I. Gas is supplied, not only to the pipes 93 to 90 inclusive, but also to all of the pilot pipes I20 by means of a pipe I22 connected to a suitable sourceof gas, and being directed underneath the singeing apparatus and connected to T H4. This pipe I22 has a manually operable valve I23 therein, by means of which the gas can be cut off from the burners when. the machine is not in operation, such as closing down at the end of a shift, or at the end of the day.

In the case of stoppage of the travel of the warp as by the breaking of an end, resulting in the closing of one of the switches in the creel board,

it is absolutely necessary that the gas be cut off immediately and the solenoid valves II 0 accomplish this, as will be presently described, but it often happens that linthas fallen down onto the pipes 93 to 95 inclusive adjacent the perforated ribbons I2I and will continue to burn after the warp is stopped-thus resulting in the burning of several ends of the warps, which requires quite a bit of time in passing these burnt ends on through the apparatus, and securing them to the winding apparatus.

In order to insure that no flame of any kind will remain upon stoppage of the travel of the warp, there has been providedmeans for supplying a compressed fluid, such as asuitable extinguishing fluid, such as carbon dioxide, or ordinary compressed air iorcausing blasts of this compressed fluid to sweepacross the upper parts of the pipes 93 to 96 inclusive, and of course, across the perforated ribbons I2I to blow any flames therefrom. With this purpose in'view, there has been provided adjacent the pipes 93 to 98 inclusive pipes I25, I26, I2I-and I20, which in the resent form. are shown, as rectangular .in cross section, and each of these pipes has .a

slot I29 extending longitudinally thereof-so that a sheet of compressed fluid isemitted from these slots I29 to sweep across the upper portions-of the pipes 93 to 9'6inclusive and the perforated ribbons I2I mounted therein. It is, of course, evident that these pipes could be of any other desired shape so long .as the axis of the stream of compressed fluid is directed across the tops of. the pipes 33 to 96 inclusive.

The pipes- I25 to I28 inclusive are supported by means of a plurality of vertically disposed pipes. I30, which at their lowerends are joined to..a .horizontalpipe I3I made up collectively of nipplesand elbows, and which pipe I3I has connected thereto a supply pipel32, which has a solenoidvalve I33 .therein, normally closed, havingwires I15 and I16 leading therefrom, which will presently be described. From the other sideof solenoid valve I33 normally held-in closed .position, apipe or hose I34 is led to a suitablesource of compressed fluid I 24.

- After the yarn has passed over the two singe-. ing devices, it is passed through the suitable reed I36 of a conventional lease-takingapparatus- This reed I36 is mountedin sidestands I37 and I38 disposed on each side of the machine and conventional means are employed for first raising the sheet of warp to pass a lease-stick insert a lease thread. These stands I37 and I38 are joined together by a suitable supporting rod.

Afterthe warp threads II pass through the reed I 36, they are brought through a substantially U-shapedv member I40 crimped inwardly at its upper end to forma kind of eye, which converts the sheet of warp into a compacted set of warp threads, which are passed over a roller I II mounted in a stand 542 and on which is mounted a support I43, which supports the constricting member I40.

The roller MI is contacted by a, conventional centrifugal sling switch I44. The warp ends II, after being .converted into condensed form, are hereinafter referred to by reference character I45, and are directed forwardly underneath 81, andis wound therearound in a conventional manner well known as ball warping.

The centrifugal switch indicated schematically at I44 is mounted on a suitable member I46 pivoted as at M1 on support E43 and has aroller I43 which drives a centrifugal mechanism, which is conventional and which is associated with switch I44 to hold the switch open whilethe roller MI is running at regular speed, but when thetmachine stops or should slow down, then this, centrifugal switch I44 will become closed and operate the solenoid valves for closing the gas line. supplying gas to the burners and at the same time opens theccmpressed fluid valves for admitting compressed fluid to the rear burners for a predetermined time to extinguish any blaze that might be on these burners. This centrifugal switch is disclosed in Patent No. 1,493,846. The'shaft, 23 in saidpatent represents the shaft pulley I4I.

The control system for the two singeing units is mounted on a panel I49 and derives its power from. anylsuitable, source of power such, as. two

main power lines I50 and II connected to a suitable source ofv 110 volt A. C. current. Wire I50 leads to one side of the centrifugal switch I44. Connected to wire I50 is a wire I52 which leads into a suitable vacuum tube time delay relay indicated at I53. Any suitable time delay relay could be used, but in the present hookup I employ a General Electric type such as shown in Patent No. 2,171,347 having General Electric Catalogue Handbook section CR7504-A3. This is also listed in a descriptive folder No. G. E.- A2902. Connected to wire I52 is a wire I54 which goes to contact I55 on a double throw, double pole relay I62. Wire I5I leads from a source of electrical energy to one side of solenoid air valve I33. From the other side of solenoid I33 a wire I56 is led to a conventional clock motor delay switch I51, where it is connected to contact I59, the structure of which is fully shown and described in patents numbered 1,977,184; 1,977,185; 1,977,186; 1,935,208; 1,996,375; 2,353,- 305; and 2,049,261. From post I59 of clock motor delay switch I51, a wire I60 leads to post I6I on the double throw, double pole relay switch disposed in housing I62, the structure of which is shown in Patent No. 2,259,127. Connected to wire I60 is a wire I63, which is connected to contact post I64 on delay switch I51. Switch I51 has a knock-off switch and a micro switch as a part thereof. From post I65 on delay switch I51 a wire I66 is connected to one side of solenoid valve III! and controls the flow of gas to the second singeing assembly. From the other side of solenoid valve IIO a wire I61 leads to a contact post I68 on the double relay switch housing I69. From contact post I of double throw, double pole relay I69 a wire I1I leads to contact post I12 in clock motor delay switch disposed in housing I13. The switch in housing I69 is shown in Patent No. 2,259,127. The switch in housing I13 is shown in patents numbered 1,977,184; 1,977,185; 1,977,186; 1,935,- 208; 1,996,375; 2,353,305 and 2,049,261. The structure of switch I13 is the same as switch I51. From contact I14 on switch housing I13 a wire I leads to one side of solenoid air valve I33. From the other side of solenoid air valve I33 a wire I16 leads to and is connected to wire I66. Also connected to wire I66 is a wire I11, which leads to contact post I18 on clock motor delay switch housing I13. This housing also has a contact post I19 to which a wire I80 is connected, said wire I80 being connected to wire I1I. Connected to post I82 leading into housing I69 of the double throw, double pole, relay is a wire I83 which is connected to a post I84 of housing I53. Housing I69 also has a post I85 to which a wire I86 is connected, and which wire I86 is connected to wire I66. The housing I53 also has a post I81 to which a wire I88 is connected, said wire is also connected to post I89 on housing I62. Also connected to wire I88 is a wire I90 which is connected to one side of the coil or solenoid gas controlled valve H0.

The other side of solenoid gas controlled valve IIO has connected thereto a wire I9I, which is also connected to wire I5! as at I92. Connected to wire I5I is a wire I93 which is connected to wire I66 as at I94 and also connected at I94 is a wire I95, which leads to a post I96 on switch housing I53. Wire I93 has connected thereto a wire I91 which in turn is connected to a post I98 on relay housing I62. This housing I62 also has a post I99 to which a wire 200 is connected, which wire 200 is connected to the other side of throw, double pole,

centrifugal switch I44. Double throw, double pole, relay mechanism disposed in housing I62 has a post 20I to which a wire 202 is connected and which wire is also connected to a post 206, on time delay relay housing I53. Switch housing I62 has also a post 204 to which a wire 205 is connected which leads to a post 203 on time delay relay housing I53.

Wire I52 which is connected to wire I50 and also connected to a post 201 on time delay relay housing I53, is also connected by wire 208 to post 209 in housing I69.

Method of operation With a strand II leading from each package in the creel through the drop wire eyelet 21, and with the parts in position, as shown in the drawings, and especially referring to Figure 3, the lever 51 will oscillate along on its pivot 58 and thus links 60 and 64 will be moved up and down as a unit until an end II parts, which will cause one of the drop wires 26 to drop, which will close the circuit to energize solenoid coil 32, which will swing the lower end of lever 64 to the left in Figure 3, which will push the upper end of lever 60 to the left in Figure 3 and cause its shoulder 52 to engage the horizontally projecting end of hell crank 64 and whose upper end 1| will swing link 19 on its pivot 69 to allow the weight not shown on shaft 61 to move lever 68 and link 10 upwardly and this will allow the shaft 61 to swing in a counter-clockwise manner, which will shift the belt 49 from the tight pulley 44 to the loose pulley 50 and stop the machine. As the machine does not stop instantly, since there is some inertia in the moving parts, the roller I48 will slow down and thus cause centrifugal switch I44 to close. This will cause current to flow from wire I50through switch I44.

When that switch is closed the current goes on line 200 up to post I99 on relay I62 furnishing the current to one side of the coil in that relay. From post I99 the current goes through the coil to I93, back up to line I91 to I93 to I5I and to the other side of the A. C. current. The hot side of the A. C. current comes 01f from line I50 to line I52, line I54 up to post I55 which is the center terminal on the double throw relay I62. When the coil in the relay I62 is energized, the current will pass through post I55 to post I89 into line I90 up to solenoid valve IIO. Passing through solenoid valve IIO along line I9I, I92, it is connected directly to line I5I which is the opposite side of the A. C. line or the ground side. When post I89 receives the current, it also passes along line I88 to post I81 and through the normally closed micro-switch in the vacuum tube time relay to post I84 and along line I83 to post I82 in the number 2 double pole, double throw relay, box 169. Passing through a conventional coil in relay I69 to post I it goes out along line I86, post I94, along line I93 to line I5I, the ground side of the A. C. supply. Now, starting at the hot side of the A. C. supply, passing along line I50 through line I52, through line 208 to post 269, the center terminal on relay I69. When that relay is energized, the current passes through post I68 out along line I61 to valve H0 and then out along line I66 to post I94 through line I93 back to line I5I, the ground side of the A. C. supply. Now, through having the centrifugal sling switch close mechanically, we have energized both relays I62 and I69 which shut off the current supply to valves H0 and H0, turning 011 the gas on the #1 and #2 sets of burners.

I I13 operates When the relay I 62 is de-energized by opening of switch I44, the current from the hot side of the A. C. supply line flowing to center terminal I55 will pass through the normally closed contacts to I6I along line I69 to terminal I59 of a microswitch portion of clock motor delay I51 and through its normally closed circuit to post I58 along line I56 to air-valve I33 and then back out along ground wire I51 which is the other side of the A. C. supply. At the same time, when relay I62 is de-energized and current is flowing through post ISI, it also flows along line I93 to post I64 of the clock motor, I51, energizing the clock motor and passing through I65 to line I99 to post I94 along line I93 to the opposite side of the A. C. supply, line II.

When the clock motor is energized it begins a slow rotation of a knock-01f shaft, which after a predetermined delay, opens the normally closed contacts I59 and I58 thus opening the circuits to air-valve I33 and closing the air supply through that valve. In like manner as described for relay I62, when relay I69 is deenergized, the current passes through post 209 to post I10, in a normally closed position, to line I1I to line I89 to post H9 in clock motor I13. Energizing this motor it passes post I18 to line I11 to line I66 to post I94 to line I93 and to line I5I which is the opposite side of the A. C. supply. At the same time, when coming off of post I19 through line I1I, it passes on to post I12, which is one side of a normally closed micro-switch. Passing on to the other side 'post I14 and down through line I15 it goes to #2 solenoid airvalve, H3. Energizing this valve, it passes on out through line I19 to I66 to post I94 through line I99 to line I5I, which is the opposite side of the A. C. supply. Thus we have both solenoid air-valves open-ed, when the relays I62 and I69 are de-energized. The clock motor in the same manner as I51. When it has been energized, a knock-off shaft turns around and after a predetermined delay opens the normally closed contacts I12 and I14, thus shutting oif the air supply through valve I33. Now with the centrifugal sling switch closed by virtue of the rate of travel of the yarn over tailstock being above a predetermined number of feet per second, both relays I62 and I69 are energized opening up both gas valves, H9 and Hill, which enables both the first and second singeing devices to be ignited by the pilot lights. After a short predetermined delay, the entire second burner assembly must become inoperative and the flame be blown out, for the second assembly is used only .to singe that portion of yarn that the first set has shipped when coasting to a stop. This is accomplished through the vacuum tube time delay relay, #153.

This relay has a complete circuit coming through the hot side of the A. C. supply along line I59, line I52 to post 291 and out along post I96, along line I95 to post I94 along line I93 to line I5I, the opposite side of the A. C. supply. Post 293 is connected to post I96 and goes to post 294 along line 295. When relay I62 is energized, the current flows from post 294- to post ZIJI back along line 292 to post 296. This closing of the circuit from post I99 to post 293 and then post 299 is necessary for the proper operation of the vacuum tube circuit. After a predetermined time delay, in this case adjustable by manual set, the current passing from post I81 to post I84 is interrupted, de-energizing relay I69, thus shutting off the circuit to gas valve III! and starting or energizing the motor delay switch I13 and opening air valve I33. As stated before after a short delay, air valve I3 9 is again closed and the air flow interrupted. This operation leaves the entire #2 burner assembly inoperative until the next yarn stop produces a skipped or ungassed portion in the yarn.

In the drawings and specification, there has been set forth a preferred embodiment of the invention and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being defined in the claims.

I claim:

1. In a singeing machine through which a plurality of strands of yarn in sheet form are passed for singeing, comprising two singeing units spaced from each other a substantial distance, means for guiding a sheet of yarn through the first singeing unit and then through the second singeing unit, a roller over which the yarn passes after passing through the second singeing unit and a ball warper having a take-up beam disposed between the singeing units onto which the yarn is wound after passing over said roller, means for stopping the ball warper take-up beam when a strand parts, a centrifugal switch in con tact with the roller and means operable by the centrifugal switch when the revolutions per minute of the roller decrease to a predetermined point for rendering inactive the two singeing units. I

2. In a singeing apparatus for withdrawing a plurality of strands from a creel and passing the strands through a warper, a pair of singeing devices spaced apart from each other, and each of the singeing devices having a plurality of perforated pipes, means for supplying a 'gas to the perforated pipes, a solenoid valve in each of the supply means to the perforated pipes, a roller disposed beyond the second singeing device over which the threads are passed after they pass through the singeing devices, a centrifugal switch in con-tact with said roller, a ball warper having a take-up beam disposed between the two singeing devices, means connecting the warper'to the take-up beam for driving the same, the centrifugal switch being adapted to be closed when the revolutions per minute of the roller decrease to a predetermined point, and a .circuit leading from said centrifugal switch to the solenoid valves for cutting off the supply of gas to the perforated pipes, means operable by a centrifugal switch upon travel of the threads through the two singe" ing devices for opening the solenoid valves to supply gas to both of the singeing devices and means operable at a predetermined time after-gas has been admitted to the second singeing device for cutting off the supply of gas to the second singeing device after the second singeing device has singed the portion of the thread between the two singing devices which may not have been singed upon stoppage of the apparatus.

3. In a singeing machine, a pair of singeing units disposed in spaced relation to each other, means for guiding a sheet of yarn across the two singeing units, means for rendering operative both singeing units upon the beginning of travel of yarn across the two singeing units, means automatically operable upon cessation of travel of the yarn for rendering both singeing units inoperable, means operable upon the resumption of travel of the yarn across the singeing units for rendering. both of the singeing units operable,- and means automatically operable after a predetermined interval of travel of the yarn across the singeing units for automatically :rendering inoperable the second singeing unit,

and means for blowing out the residual flame on the singeing units when theyhave been rendered -inoperable.

-passed for singeing the same, means automatically operable upon the beginning oftravel of theyarn across the singeing units for supplying gas to both of the singeing units, means automatically operable upon the stoppage of the travel of the yarn across the singeing units for cutting off the supply of gas to the burners, means automatically operable upon the beginning of travel of the yarn across the singeing units for supplying gas to both of the singeing units and means automatically operable after a predetermined intervol of travel of the yarn over the two singeing units for automatically cutting off the supply of gas to the second singing unit, and means for blowing out any residual flame after the supply ofEgas has been cut off from the singeing units.

5.;In a singeing apparatus for withdrawing a plurality of strands from a creel and passing the strands through a warper, a pair of singeing devices-spaced apart from each other, and each of ,the singeing devices having a plurality of perforated pipes, means for supplying a gas to the perforated pipes, a solenoid valve in each of the supply means to the :perforated pipes, means operable upon travel of the threads through the two singeing devices for opening the solenoid valves to supply gas to both of the singeing devices, a rollerv over which the threads are passed after theypass through the singeing devices, a centrifugal switch incontact with said roller, a ball war-per having a take-up beam disposed between the two singeing devices, means connecting the take-up beam to the ball warper for driving the ,same, the centrifugal switch being adapted to be closed when the revolutions per minute of the roller decrease to a predetermined point, and a circuit leading from said centrifugal switch to ,thesolenoid valves for cutting off the supply of gas to the perforated pipes, means operable upon travel of the threads through the two singeing devices for opening the solenoid valves to supply -gas to both of the singeing devices-and means operable aftera predetermined time forcutting off the supply ofgas to the secondsingeing device after the second singeing device has singed the ;portion of the thread between the two singeing -1devi-ces which may not have been singed upon stoppage of the apparatus, and means for forcing acompressed fluid across the burners in each :singeing unit upon cessation of travel of the yarn *Ior extinguishing any flame remaining thereon.

16. In a singeing apparatus comprising two singeing units disposed in spaced relation to each other, means operable upon starting of the travel of the yarn for supplying gas to the singeing units, means automatically operable upon stoppage of the travel of'the yarn for cutting off the supply of gasto the two singeing units, means operable upon starting of the travel of the yarn ior supplying gas to the singeing units, means operable after a predetermined time'of travel of the-yarn across the two singeing units for auto-- matically cutting off the supply of gas to the second-singeing unit, and means for forcing a compressed fluid across the burners in each singeing unit upon cessation of travel of the yarn for extinguishing any flame remaining thereon.

7. In a-singeing apparatus, a pair of spaced singeing units across which a sheet of yarn is passed for singeing the same, means automatically operable upon the beginning of travel of the yarn across the singeing units for supplying gas toboth the singeing units, meas automatically operable upon stoppage of the travel of the yarn across the singeing units for cutting off the supply of gas to the burners, means automatically operable upon the beginning of travel of the yarn across the singeing units for supplying gas to both of the singeing units and means automatically operable after a predetermined interval of travel of the yarn over the two singeing units for automatically cutting ofi the supply of gas to the second singeing unit, and means for forcing a compressed fluid across the burners in each singeing unit upon cessation of travel of the yarn for extinguishing any flame-remaining thereon.

8. singeing apparatus comprising a perforated pipe, means for supplying gas to the interior of the perforated pipe, so that it can be ignited to L burn as it emerges to the exterior of the perforated pipe, means for passing a sheet of Warp threads across the perforated pipe and through the 'fiame associated with the perforations in the pipe, means for automatically cutting on the supply of gas to the perforated pipe upon stoppage of the travel of the threads, and means also operable upon stoppage of the travel of the threads for forcing a sheet of compressed fluid across the perforated pipe to extinguish any'residual flame on the perforated pipe.

9. Apparatus for singeing yarn, cloth, and the like comprising a pair of gas burners spaced apart from' each other, means for conducting the material to be singed across the two gas burners, means operable automatically upon slowing down of the speed of the travel of-the material being singed for cutting off the supply of gas to the burners, means automatically operable upon the cutting off of the supply of gas to the burners for projecting a sheet of extinguishing fluid across the burners for extinguishing any residual flame thereon, means automatically operable upon the resumption of travel of the warp for automatically supplying gas to both-burners, and means automatically operable after a predetermined time for cutting 01f the supply of gas to the second burner, while maintaining the supply of gas to the first burner.

10. Apparatus'for singeing a sheet of material comprising a pair of gas burners disposed in spaced relation to each other and across which the sheetis adapted to be passed for singeing the same, each gas burner having a pilot tube for supplying a pilot light to each burner, means for supplying gas to each burner, a solenoid valve from the gas supply line to each burner, means operable automatically and controlled by the speedof the material being singed for opening the solenoid valves to admit gas to the burners while the material is traveling across the burners, said means being automatically operable to close the solenoid valves upon a decrease of the rate of travel-of the material, means for extinguishing the flames on the burners upon a decrease in the speed of travel of the material, means operable automatically to open the solenoid valves to supply gas to the burners when the material resumes its normal speed of travel, and means automatically operable after apredetermined interval after the resumption of 13 travel of the material for cutting ofi the supply of gas to the second burner.

11. That method of singeing a sheet of material, such as yarn, cloth and the like, which comprises :passing the material across two spaced singeing units, rendering operative both singeing units at the beginning of the travel of the material, and rendering inoperative the second singeing unit at a predetermined time after the beginning of the travel of the material, and automatically rendering both singeing units inoperative upon the travel of the material slowing down below a predetermined rate of speed.

12. That method of singeing a sheet of material, such as yarn, cloth and the like, which com- 15 prises passing the material across two gas burners, supplying gas to both gas burners at the 14 beginning of the travel of the material and cutting off the gas to the second gas burner at a predetermined time after the beginning of the travel of the material and automatically cutting off the supply of gas to both burners upon the rate of travel of the material slowing down below a predetermined rate of speed.

RICHARD R. CONE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,722,910 Gravel July 30, 1929 1,928,973 Elliott et al. Oct. 3, 1933

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