US1958095A - Variable speed transmission - Google Patents

Description

May 8, 1934'o F, s, PAPEZ 1,958,095

VARIABLE SPEED TRANSMISS ION Filed Nov 1930 3 Sheets-Sheet l :GD- icalal i e o l i REQ@ May 8, i934. F. s` PAPEz VARIABLE SPEED TRANSMISSION -Filed. NOV. 22, 1930 3 Sheets-Sheet 2 May 8, 1934. F. s. PAPEZ VARIABLE SPEED TRANSMISSION Filed Nov. 22, 1930 5 Sheets-Sheet 3,

Patented May 8, 1934` 1,958,095 VARIABLE SPEED TRANSMISSION Frank S. Papez, Chicago, lll.

Application November 22, 1930, Serial No. 497,472

2 claims.

This invention relates to improvements in automatic stokers and particularly to a Stoker adapted for use in continually feeding fuel to a furnace.

One of the objects of the present invention is 5 the provision of an automatic Stoker especially adapted for use in feedingl coal to a furnace, and includes means for regulating the amount of fuel being fed to the furnace so that the amount of fuel being fed to the furnace can be manually controlled at a remote point, and the fuel fed to the furnace as required.

Another object of the invention is the provision of an automatic Stoker, wherein the fuel is fed to the Stoker through the medium of individual containers which can be lled at the average coal yard, or at the mines, so that the filled containers can be delivered to apartment houses, dwellings, or other buildings to be heated and prevent the coal from being scattered about the place and reduce to a minimum the amount of coal dust therefrom which is a great annoyance in the handling of coal.

A further object of the invention is the pro- Vision of an automatic Stoker for furnaces, which can be especially constructed for use in apartment houses, dwellings, and similar buildings whereby the feeding of the coal can be controlled at a remote point so that the feeding of the coal L. the furnace can be increased or decreased at the -will, of the operator, or according to the amount'of heat desired and simultaneously with this adjustment, the proper amount of air is provided according to the amount of fuel being fed into the furnace to secure the proper combustion of. the Same.

A still further object of the present invention is the provision of an automatic Stoker including means for feeding the fuel to the furnace in dif-V ferent amounts, together with means whereby the 40 automatically fed to the furnace,.or the feeding rof the fuel can be hand operated according to the requirement.

A still further object of the present invention is the provision of an automatic Stoker for feeding fuel to furnaces, such as coal and the like, wherein a predetermined amount of moisture is mixed with the fuel as it is received from the containers and fed to the jfurnace for aiding combustion and producing the maximum amount of heat from the fuel. p A stillV further object of the present invention is the provision of an automatic Stoker including manuallyla'djusted means for automatically feedfeeding of the fuel can be manually regulated and Ing meiner to the` furnace wherein the feeding" mechanism can be varied according to the amount of fuel required, and wherein the fuel is fed to the feeding mechanism from separate containers which are deposited in an inverted position upon the feeding hopper, so that the coal from the containers can be discharged into the feeding hopper and carried direct to the furnace, reducing to a minimum the handling of the fuel.

A still further object of the present invention is the provision of an automatic Stoker for feedingpredetermined amounts of fuel to furnaces, such as coal and the like, including means for feeding the proper amount of air and a predetermined amount of moisture as it is received from the containers and fed to the furnace for aiding combustion and producing the maximum amount of heat fromfthe fuel with a minimum amount of smoke, grime, and soot which are a great waste and annoyance in the burning of coal, particularly coals of the cheaper and lower grades.

With the above and other objects in view, the invention consists in the novel features of lconstruction, the combination and arrangement of parts hereinafter more fully set forth, pointed out in the claims and shown in the accompanying drawings wherein:

Figure 1 is a longitudinal sectional viewof a Stoker constructed in accordance with my invention, with parts thereof illustrated in elevation;

Figure 2 is an end elevation with parts broken away and illustrated in Section;

Figure 3 is a detail vertical section of the driving mechanism for the feeding screw, with parts thereof broken away and parts illustrated in ele- Vation;

'Figure 4 is a horizontal sectional view of the driving mechanism taken on the line 4 4 of Figure 5; and,

Figure 5 is a vertical-section taken on the line 95 5 5 of Figure 4.

One of the essential features of this invention is the provision of an automatic Stoker wherein individual containers are used for conveying' the coal or other'fuel to the building or place of 100 use, to not onlyprevent wasting of the fuel, but to reduce to a minimum the usual annoyance v from coal dust and other dirt which usually accumulates during the handling ofthe loose fuel, Such as coal and the like. These containers can be constructed to hold Various amounts of" fuel and can be filled at the mines, or the average coal yard, and can be easily transported to any desired place.' "In the accompanying drawings, it will be noted that in Figure 1, the device is shown in charging position as applied to a furnace generally indicated at 1. The furnace is provided with the usual rebox 2 and grate opening 3 through which the fuel is fed to the flrebox 2. The tubular body 4 through which the fuel is fed is provided with a lateral offset portion 5 communicating with the grate opening 3, so that the fuel can be fed upwardly directly into the flrebox.

'I'he outer end of the tubular member 4 is provided with an upwardly extending portion 6, forming a suitable hopper or receiving receptacle for the fuel and at the upper end of the portion 6 there is provided an annular flange 7 upon which hopper 8 is mounted, the hopper carrying an angular part 9, one flange of which rests upon the lateral flange 7 and is connected thereto by means of pins 10, anchored in flange 7.

The receptacles 11 which contain the fuel are fitted upon the upper open end of the hopper 8 and are connected thereto by means of pivoted catches 12. The lower end of the hopper 8 is normally closed by means of the swinging doors 13, which upon the release of latch pins 13', and under the weight of the fuel, will move to an open position, as shown by the dotted lines in Figure 1. In the bottom of the hopper there is provided a screen 14, to screen the fuel as it passes into the receptacle members, so as to prevent foreign matter from entering the furnace with the fuel, and otherwise breaking or injuring any part or parts of the several mechanisms providing for: an automatic stoker. x

In order to determine when the receptacle 11, mounted on the hopperlis empty, I provide a signal device in the form of a pivoted arm 15 having contact members 16 connected therewith which are in intimate engagement while the fuel is flowing through the hopper 8. However, as soon as the fuel ceases flowing through the hopper 8, the arm 15 will move to an upright position, as shown in Figure 1, and break the circuit?.V The conductors 17 may be'connected to a signal light, so that while the fuel is being fed through the hopper, the light will be 'burning due to the engagement of th contacts 16. However, when the fuel in the receptacle 11 has been exhausted, and it is necessary to replace the empty container with a filled one, the arm\15 will move upwardly, breaking the circuit and cutting oi the light.

Arranged within the tubular member 4 is the conveyor screw 18 carried by the shaft 19. This shaft and conveyor screw not only extend through the tubular member 4, but pass through the member 6 and beneath the upward extension 5, so that the fuel gravitating downwardly from the receptacle 11 will be carried forward by the screw conveyor 18 until it reaches the reversed night 20 in the screw, this reversed iiight being particularly adapted for use in urging the fuel upwardly through the grate opening 3 to the ilrebox, so that the fuel will be. continually fed to the furnace as fast as the top is burned off,

Y providing a continuous supply of fuel to the firebox. e'

The outer end of the shaft 19 extends into the housing 21 which is attached to the tubular member 4 and the part 6 by means of bolts 22. Arranged within the housing 21 and keyed to the shaft 19 is a disc 23 having an annular flange 24 extending laterally from one side thereof. As shown in Figure 4, the hub 25 of disc 23 is of substantially the same width as the ange 24 and is attached directly to the shaft 19 by means of set screw 26.

Loosely mounted upon the bushing 27 which has a press flt on the shaft 19, is a hub 27' carrying a lateral clutch member 28. The clutch member 28 is arranged within the flange 24, as shown in Figure 4, and carries a plurality of dogs 29 which are normally urged into biting and compressive engagement /with the inner surface of flange 24 by means of coil springs 30 which are disposed between the brackets 31 and one side of the dogs.

Extending outwardly from one side of the clutch body 28, is an internally threaded lug 32, receiving a stud 33 which passes through a sleeve 34 at one side of an arcuate crank arm 35. The other end of the arcuate crank arm 35 is provided with a sleeve 36 mounted upon the stud bolt 37. The stud bolt 37 is connected to a bearing housing 38 in which is mounted the follower roll 39.

Mounted upon the shaft 19 within the housing 2l is a large worm gear 40 having a comparatively large hub 41 which is mounted upon suitable roller bearings 42 which are retained in spaced relation by means of a collar 43, keyed to the shaft 19, as shown in Figure 4. y i

A stop plate 44 is attached to one side of the hub 41 and prevents the bearing members 42 from leaving the hub at one side, while the bearing members at the other side of the hub are retained in position by means of a cam 45, attached to the hub 41 at the side of the gear opposite the plate 44.

The cam 45 is eccentrically connected to the hub and is adapted to contact the follower roll 39, as shown in Figures 4 and 5.

In order to impart movement to the gear 40, a worm-46 is mounted on the drive shaft 47, connected to an electric motor 48, whereby continuous rotary movement of the gear 40 will be provided for.

Formed integral with one sideV of the housing 2l l is a bearing sleeve 48', in which the outer end of the shaft 19 is mounted, a collar 49 being arranged' on .the shaft at one end of the sleeve 48', while ing shaft 19.

Extending outwardly from one side of thehousing 21 and connecting with the interior thereof is a sleeve 55 supported by means of a bracket 56. Slidably mounted within the sleeve` 55 is the tubular follower sleeve 57, which carries the bearing housing 38 and roller 39.

The inner end of the tubular sleeve 57 is closed by means of an internal stop collar 58 through which is mounted for free rotation an adjusting screw 59 having adjustably mounted thereon a nut 60. The outer end of the screw is comparatively smooth, as shown at 61, and is rotatably mounted in a suitable bearing 62 with a pinion 63 mounted upon the outer extremity of the screw. The screw is retained against longitudinal movement by means of a collar 64 arranged at one end of the bearing sleeve 62, while the pinion 63 is arranged at the other end of the bearing sleeve 62.

Positioned between the adjustable nut 60 and the bearing housing 38 is a coil spring 65 which normally urges the sleeve 57 outwardly as the roller 39 travels about the cam 45. However the nut can be adjusted along the screw 59 to vary the longitudinal movement of the sleeve 57, this being done in order to regulate the movement of the arm 35 for 'the rotation of the clutch 28.

A stud shaft 66 is detachably connected with a bearing sleeve 67 supported by sleeve 55, and on stud shaft 66 is a gear 68, meshing with pinion 63. Also keyed to the gear 68 for rotative movement on the shaft 66, is a bevel gear 69, meshing with a similar gear 70 on the lower end of shaft 71. This adjusting shaft, or plurality of the same, may extend to any desired point where it is necessary to locate the manual control mechanism.

The control mechanism may be in the shape of a hand Wheel, or other similar device attached to the upper end or plural extension of shaft 71 for imparting a rotative movement thereto.

Arranged at one side of the housing 21 is a fan wheel and chamber 72 provided with an inlet opening 73 in which is arranged a movable shutter 74. 'I'he slats of the shutter are connected to an adjustable rod 75 which in turn is connected to a sleeve 76 on a threaded portion 77 carried by shaft 71, so that when shaft 71 is actuated for adjusting the stress of spring 65, to regulate the amount of fuel being fed by the screw 18, the shutter 74 may also be actuated simultaneously therewith for regulating the amount of intake of air to be fed simultaneously with the fuel.

It has been found by experience that by providing a certain amount of moisture with the fuel,

the combustion will be increased and the heating quality of the fuel will be also increased and, therefore, I provide the tubular member 4 with an opening 78 which communicates with a supply pipe 79 in which is arranged a needle valve 86, actuated by a pivoted arm 81 which is disposed in the path of a trip 82, so that as the hand grips 54 rotate with the shaft 19, the trip 82 will contact with the pivoted arm 81 and open the valve at predetermined intervals, providing a predetermined amount of water to the fuel as it is fed through the tubular member 4.

In some instances, the sleeve 57 may necessarily be cylindrical, and in this case, the sleeve is provided with longitudinal slots 83, and positioned within these slots are the inner ends of the bolts 84 carried by sleeve 55 which prevents rotation of sleeve 57 in the bearing sleeve 55.

As set forth heretofore, it is preferred to use individual containers for supplying fuel to the receptacle 6, one of the containers being generally indicated at 1l. Bygusing these individual containers, it not only reduces to a minimum any waste of the fuel, but also reduces to a minimum the usual dirt which accumulates from the coal, dust and the like, so that with this type of stoker, the coal or other similar fuel cannot only be easily handled, but will be far more sanitary than with the old way of handling fuel.

In the operation of this device, a flre is started in the firebox 2, and the rod or shaft 7l can be manually adjusted from remote control, or shaft 19 which carries the feed screw 18, can be operated by grasping the hand grips 54 and rotating the shaft by hand. However, after the fire has been started, the motorv 48 is thrown into operation, and the motor drives the worm shaft 47, operating the worm 46 which imparts a rotative movement to the worm gear 40, and as the worm gear 40 rotates, the cam 45 is rotated therewith. Before starting the motor, the screw member 59 is rotated to adjust the nut 60 according to the amount of movement of the sleeve 57, desired.

In Figure 5, the nut 60 is adjusted to the outer end of the screw 59 for providing a complete stroke of the follower roll. As the cam 45 rotates, the roller 39 will be urged into engagement with the cam through the medium of the coil spring 65 which is disposed between the bearing housing 38 and the nut 60.

As shown in Figure 5, the nut 60 is adjusted to provide for the maximum' throw of the sleeve 57 thus the roller 39 will be retained in engagement with the cam 45 at all times. As the sleeve 57 moves outwardly, with the roller, following the outlines of the cam 45, the arm 35 will be actuated to move the clutch member 28 in a backward movement, the dogs 29 sliding over the inner surface of ange 24. As soon as the roller 39 reaches the low point of the cam, and begins its return movement by riding to the high point of the cam, the clutch member 28 is moved in a reverse direction. causing the dogs 29 to bite and press on the inner surface of flange 24 and imparting a rotative movement to this flange and the disc 23.

lThis action just described will impart a rotative movement to shaft 19, rotating the screw 18 in the proper direction for feeding the fuel toward the furnace along the tubular member 4.

It will be noted that upon each stroke of the tubular sleeve 57. due to the rotation of cam 45, the shaft 19 will be rotated at predetermined amounts. conveying the fuel from the body of the receptacle portion 6 toward the rebox of the furnace. As the fuel reaches the reverse flight 20, it will be urged upwardly toward the grate opening 3 in the rebox, and due to the rotation of the screw, and the action of the reverse flight 20, there Will be a feeding of the fuel into the lirebox.

In order to regulate the feeding of the fue', the nut is adjusted along the screw member 59 and as shown in Figure 4, the nut is shown at its innermost position, so that the spring 65 provides for a minimum amount of action on the part of the sleeve 57. Therefore, when the nut is in this position, the sleeve 57 is retained b v stop colar 58, and theroller 39 will not be urged into contact with the cam 45, so that there will be no movement of the arm 35 and the clutch member 28. However, as the nut 60 is adjusted outwardly on the screwmember 59, the stress of the spring 65 will create a predetermined movement on the part of the sleeve 57, and as the stress of the spring is decreased, the outer movement of the sleeve 57 is increased, thus increasing the amount of rotation of the shaft 19.

In adjusting the screw member 59, rattention is directed to the fact that this can be done by remote control or suitable mechanism can be attached to the shaft 71 adjacent the furnace. However, the rotation of the shaft 71 will impart movement tothe gears 69 and 70, the gear 68 and pinion 63 for operating screw 59 to adjust nut 60 along the same. While the screw 59 is being adjusted to vary the movement of the sleeve 57, it will be noted that sleeve 76 is moved along the threaded enlarged portion 77 for opening and closing the shutter 74, thus simultaneously regulating the supply of air with the feed of the fuel, so that the air can be supplied according to the amount of fuel being supplied to secure proper combustion in the firebox.

The air pressure within the sleeve 57 which has a tendency to accumulate, due to the reciprocation of this sleeve, is relieved through an outlet 85 in the housing 38.

Attention is also directed to the fact that the handwheel including the hand grips 54, at one end of the shaft 19, is rotated simultaneously with shaft 19, and through this rotation, the arm 82 will engage the trip lever 81 for opening the valve at predetermined intervals to supply an amount of water to the-fuel as it passes through thetubular member, the amount of water being governed by the amount of fuel, due to the fact that if the fuel is being fed slowly through the tube 4, the rotative movement of the handwheel will be at a comparatively slow rate of speed, thus the water will be fed into the tubular member in accordance with the amount of fuel passing therethrough.

Attention is directed to the fact that the tubular sleeve 57 is placed on a line centrally of the Shaft 19. However, this sleeve 57 may be positioned above or below the center line and operate in an equally efficient manner as the relative position of the cam 45 may be varied, if found desirable.

It is believed that with the use of this type of stoker described above and illustrated in the accompanying drawings, a great saving of fuel can be provided for, and the inconvenience of the usual dirt accompanying the handling of loose fuel will be reduced to a minimum as the fuel can be handled in containers, and these containers placed in an inverted position above the hopper 8, as shown in Figure 1, to provide for a continuous feeding of the fuel Without unnecessary handling.

The signal mechanism will readily signify to the operator when it is necessary to place a iled container on the hopper. The device as a whole is inexpensive for the purpose, and it is believed that the same can be installed at a comparatively low cost. While the device has been particularly described as for use with apartment buildings, oice buildings, dwellings, and the like, it will be apparent that it can be manufactured on a large scale and used in factories and various other similar places.

While I have shown and described the preferred embodiment of my invention, it will be apparent from the foregoing that slight changes may be made in the construction when putting the invention into practice without departing from the spirit of the same or the scope of the appended claims.

I claim:

1. In a device of the class described, a rotatably mounted shaft, a power driven gear loosely mounted on the shaft for independent rotation relative to the shaft, a cam member carried by the gear and arranged eccentrically on the shaft, a reciprocating follower mounted at one side of the shaft and adapted for engagement with the cam, means for adjusting the movement of the follower relative to the cam including a coil cornpression spring engaging one end of the follower,

and an adjustable nut for engaging the other end of the spring for increasing or decreasing the tension thereof, and means forming operative connection between the follower and the shaft for imparting an intermittent rotative movement thereto.

2. In a device of the class described, a rotatably mounted shaft, a power driven gear loosely mounted on the shaft independent thereof, a cam member carried by the gear and arranged eccentrically on the shaft, a reciprocating follower mounted at one side of the shaft adapted for engagement with the cam for actuation thereby, means operatively connecting the follower and the shaft for imparting a rotative movement to the shaft in onedirection, means restricting the movement of the follower relative to the cam to form non-operative connection between the follower and the shaft, a threaded stem rotatable within nut forming means for adjusting and predetermining the movement of the follower and operative connection thereto, and means for rotating the threaded stern from remote positions for imparting a predetermined rotative movement to the shaft. I

FRANK S. PAPEZ.

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