US886294A

US886294A - Electrically-controlled feed mechanism.

Info

Publication number: US886294A
Application number: US30345306A
Authority: US
Inventors: Bengt M W Hanson
Original assignee: Pratt and Whitney Co Inc
Current assignee: Pratt and Whitney Co Inc
Priority date: 1906-02-28
Filing date: 1906-02-28
Publication date: 1908-04-28
Anticipated expiration: 1925-04-28

Description

No. 886,294. PIATENTED APR. 28, 1908.y B. M. W. HANSON. ELEGTRIGALLY OGNTROLLED FEED MEGHANISM.

APPLICATION FILED PEB. 28, 1906.

2 SHEETS-SHEET l.

No. 886,294. PATENTED APR. 28,1908'.

B. M. W. HANSON.

ELECTRIGALLY CONTROLLED FEED MECHANISM.

APPLICATION FILED PEB. 28, 1906.

2 SHEETS-SHEET 2.

para, sarna naar onirica.

BENGT M. W. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT & WHITNEY COMPANY, OF HARTFORD, CONNECTICUT7 A CORPORATION OF NEWJERSEY.

ELECTRICALLY-CONTROLLED FEED MECHANISM.

trolled devices for regulating the movement of feed-mechanism, and While illustrated applied to means which may be employed for determining the true cylindricity of work is limited to no s ecial art, being in many of its details applica le for use in various classes of machines.

Mainly, the object of the invention is theI provision of -improved contact-devices, governed by what is technically known as a' Hfeeler in engagement with the Work', and serving to control automatically the feed-motion of the machine.

Further objects of the invention relate to details of the contact-devices, and to improved electrical connections, plugs, etc.` whereby mistakes due to carelessness may be avoided.

Other objects of the invention will be disclosed in the now-following, detailed description.

In the accompanying drawings Figure l1 is a view in elevation, showing part of an automatic feed-mechanism, and electrically-controlled devices for controlling the movement of the same. Fig. 2 is a transverse section of a machine-bed, a cross-slide mounted onways thereof, and a casing carried by said slide, parts being shown in elevation. And `Fig. 3 is a front view of the parts illustrated in Fig. 2 detached from the way of themachine on which they are placed.

Like numerals designate similar parts throughout the several views. Y

Referring to Fig. 1 of the drawings, the numeral 1 designates a shaft of mechanism (not shown) which mayo erate the means for feeding a reducing-too or other im lement, and rigid with said shaft is a ratc etwheel 2, only a part of which is illustrated.

Adjacent to the ratchet-wheel' and supported to swing freely upon the hub thereof is a paWl-bearing arm 3, in which near its Specification of Letters Patent.

Application led February 28,1906.

. vertically-adjustable stop-screw 30,

i Patented April 2e, 190e.

Serial No. 303,453.

hub is firmly -fitted a wrist-pin 4 passing through a slot 5 in the end of a link 6, having areciprocatory motion due to a connection at its other end (not shown) with any suitable device. When driven forward the link 6 will iirst take up lost-motion with reference to arm 3 in consequence of the slot 5 moving over pin 4 until the end of the slot engages with said pin 4, and swings the arm 3 throu h an arc due to the amount of advance of said link 6.

Pivoted on a screw of arm 3 is a pawl 8, having a ratchet-engaging tooth 9, and held to its work by a spiral-spring 10, one end of which is attached to a pin 11 on said paWl 8, and its other extremity to a pin 12 on arm 3, as shown by dotted lines in Flg. 1. Attached at 13 to the outer end of p'awl 8 isv an armature 14, the electro-magnet 15` of which is su ported on an extension 16 of arrn 3.

esignated by 17 is a spring attachedat its lower end to extension 16,/` and provided at its opposite extremity with a latch 18. When the pawl 8 is raised to disengage tooth 9 from ratchet-Wheel 3 by a handle 19 at the free end thereof or the magnet 15 is enersnaps overV ar corner of the armature 1li-and vretains it in said position.

Beneath the extension of arm 3, and in contact with the under side thereof is a vertically-adjustable screw 20, having a rounded tip 21 and a knurled head 22, said screw being threaded into a lug 23 of a plate 24. This late is to be attached to the machine-frame y screws 25 and dowels 26, and pivoted at 27 to this plate is a' lever 28, carrying in an internally-threaded boss 29 of its up er-end a aving a knurled head 31; the smooth shank of said screw just clearing the -outer end of the eX- tension 16. Attached to an intermediate part of lever 28 is an armature 32, land connected at' one end to a stud of a lug 33 of lever 28 is a coiled spring 34, said spring bearing at its opposite extremity against a lug-35 of the late 24.

`Deslgnated by 36 is an electro-magnet secured to the plate 24, the base of the solenoid 37 of which 1s attached to the said plate 24, the parts being located in an inclined position, as illustrated. When magnet 36- is energized the angular inward movement. of lever 28 is sufficient to throw the end* of stopscrew 30 under the extension of arm 3 when said arm is swinging'to advance the pawl, and on the return movement ofl said arm and pawl the arc of traverse will be limited by said stop-screw and according to the position in which it is set. By'providing the slot 5 in link 6 a suflicient .amount of lost-motion battery-cells may be located at any conven-' ient point in or about the machine in which .the'feed-mechanism is employed.

Referring to Fig. 2, the numeral 40 indicates the way of la machine-frame in the base .of which the

batteries

38 and 39 may be located, and on which may be placed the usual head'and tail-stocks (not shown) carrying the live and dead-centers for supporting the rotating work 42, with which in the present instance, the invention coperates.

A chambered base 43 is adjustably clam Y ed to the way 40, in any desired manner, an 1n said way 1s a longitudinal T-slot 44, in which is inserted an L-shaped clamp 45 for readily applyin 'and detachlng the dimensioning apparatus ereinafter described.'

. v In a transverse bore of the base is mounted a shaft 46 having a reduced eccentricortion 47 at one end on which the clamp 45 is s eeved, and a handle 48 at its opposite extremity. A

4 `nut 49 secures the clamp againstdisplace- I nent, the clamp movin throu cation filed Sept.

ment longitudinally of the shaft, and a s ringactuated plunger 50 mounted in a soc et of the base 43- bears with constant pressure against the threaded end of the shaft upon the eccentric part of which said nut. is mounted. To permit the removal of the. dimensioning apparatus the shaft 46 is turned to release the clamp, and then by thrusting the shaft inward the base and its parts may be readily withdrawn by an u ward movethe slot. t N o claim is made in t is app ication to the lmproved clampin -devices for they constitute part of the su ject-matter of my ap li- 8, 1905, Serial Num er 277,549. e j

Fitted in a transverse A top of the base 43 is a sli e 52, perforated at 1ts outer endto receive a nut 53, which is secured by a screw 54. In said nut is threaded a screw supported 'in a bracket 56 secured to the end of an overhang 57 of the base 43 by screws 58. On the outer end of the screw 55 1s. sllined a hand-wheel` 59 prevented from d1s acement by anut 60, and on the hub of sai hand-wheel is sleeved a graduated ring -or micrometer gage 61` which will co erate with the usual mark' (not shown) on t e top uidewayl on the l of bracket 56 to indicate the advance of slide or carriage 52.

-Mounted on the slide 51 is a supporting frame or casing 62, and in the inner end of this casing is pivoted an angle-lever 63, having a short arm 64 carrying a s lit-clamp 65 in which a pin 66 acting as a eeler to en- A, Fig. 2, and in the upper ends of said standards is journaled a rock-shaft 74. Rigid with this rock-shaft 74, and secured thereto at about its central portion, is a lever having a Wei hted arm 76 to, over-balance its arm77. n a socket at the end of the. arm 77 is secured a plug 78l of latinum or lother suitable metal sha ed to orm a contact-point at its lower en A pin 79 on one of the standards. revents the descent of the weighted arm 7 6` eyond a certain oint.

Journaled in the standards 73 iagonally below the rock-shaft 74 is a second rock- 4shaft 80, and secured'. intermediate its ends to the rock-shaft 80 is a lever 81, havingjiJ weighted arm 82 and a forwardly-projecting arm 83. In a socket at the free end of arm 83 a bushing 84 com osed of insulating material is inserted, an in said bushing is located a platinum or other plug 84 shaped at its ends to form contact-points. Below the plug 84 and located in a socket of the casing 1s a bushin 85, also of insulating-material, and in said ushing is a metallic plug 86 having a contact point 87 at its upper end adapted to engage the contact point of the plug 84. y V

From the' rock-shaft 80 an arm 88 depends, and threaded vinto lthe base of the casmg is a screw 89 having a knurled head'90, the point of said screw engaging said arm, andthe screw serving to adjust the lever 81 as circumstances may require.

Designated by 91 is a rock-shaft which is journaled in the sides of the casing, and carries at a'point beneath the long arm of the lever 63 a terior to t e casing a handle 93 by which the lever 63 may be actuated to force its long arm upward and its short arm to the right to( discharge the feeler 66 from the work.

Disposed along the front of the machine-- bed are two series of sockets 94 and 95,. the sockets of each series being spalced apart from each votherfor a purpose hereinafter described. In -the sockets 94 insulating plugs or bushings 96 are threaded, while in those indicated by 95 other insulating-plugs or bushings 97 are secured in the` same manner. v Y

pin or tappet 92, and at its end eX- to a contact-post 112'.

Each of the bushings 96 and97 is internally threaded to receiveexternally-threaded, hollow plugs 98 99 respectively, the bore of each of which is tapered; that of the plug 98 being larger than that of the bore in -the plug 99. Removably fitted in the taperbore of the plug 98 is thetapered shank of a pin 100, and similarly fitted in the bore of the plug 97.is the tapered'shank of a plug 101 of'less diameterI than said pin 1.00'.- lt is frequently necessary to break the circuit, and to avoid any possible mistake in reestablishing the same the tapered shanks of the pins are made of ldifferent sizes. It is,of course, impossible to insert the larger pin in the end of the tapered bore of the plug 99, and 'should the smaller pin be insertedin the larger bore of the plug 98 the connection will not be established, and when the fingers are released it will, du'e to the tapered surfaces of the pin and bore, immediately either fall out of the bushing or be inclined to an innocuous position. Connecting the pins 100' are insulated wires 102 and connecting the pins 101 are like wires 103, each wire being conv eniently disposed along the side ofA the frame'of the machine, or located in grooves for their reception along said side.

Connected to the shank of the rlght-hand end pin 100 is a lwire 104 leading to bindingpost on the positive pole 105 of the batterycell 38, and attached to another of said pins 100, to all of the series of which the wire 102 is connected as stated, is avwire 106 leading to a binding-post 107 mounted in an insulated bushing 108 fitted in an opening of-the casing 62. Leading from said binding-post 108 to the plug 84 is a wire 109, and also leading from the plug 77 is a wire 110, in contact withthe metallic casing 62, which for the purpose of conductivity isa part of the machine-frame. A

Connected at one end to the plug 86 is a wire 111 attached at its opposite extremity A wire.113 leads from said contact-post to the shank ofthe plug 101, and through the wire connection 108 to the shank of the last plug 101 of the series, from which the wire 1,14 leads to the positive pole of the battery 39. rllo the negativepole ol' said battery a wire 115 is at-- tached, said wire leading up to, and being in contact with, the solenoid magnet 15. A wire 116 1s attached at one cnd to the negative-pole of thc batteryl, and at its opposite end to the solenoid magnet 36. ln this 'way the circuit from the batteries is established, and,supposing theI machine to bc utilized in connection with the reduction of work by a grinding process, the operation is as follows-- vBefore the action. of the dimensioning apparatus commences the work to be reduced is placed on centers of the usual head and tailstocks, said stocks being carried by areciprocatory carriage, the feed mechanism of which actuates said carriage and traverses the work .along the surface of a reducingagent not shown.

' To illustrate the manner in which the apparatus works, attent-ion is invited to Letters Patent granted to me June 30, 1903, Number 732,184 to which reference may be had. At the linception of the operation of the present invention the rock-shaft 91 is turned to lower its projection 92 out of engagement .with the long arm oflever 63,

thereby permitting said arm to fall by gravity, and to carry its shorter arm 64 inward, and cause an engagement of the feeler 66 with the work to be reduced. As said work traverses the reducing-agent the feeler, of course, closely follows its surface, and'when4 the work has been-reduced to the desired extent the contact-screw 67 will engage the plug 69. As further reduction occurs inthe diameter of the work, said screw 67 will force downward the weighted lever 7'6, and cause the contact-plug 84 to then engage both of the

plugs

69 and 86, thereby establishing a circuit through the wires and connections described to the electro-magnet 15, energizing the solenoid thereof, and drawing down the lever 8 until it is locked by the latch-lever 17. This stops the feed, and indicates that the work is finished. When contactv with the plug 84 is made by point 69 the circuit is established between said plug 84, the wire 109, contact 107, wire 106, plugs 100, wire 103, wire 104, and battery 38 with the wire 116, thereby energizing the magnet 36, and causing the lever 28 to-be swung inward on its pivot 27 against the action of the spring 34 to throw the end of the screw 30 beneath the extension 16 of lever 3, thus limiting the descent of said lever and in case too much reduction has taken place altering the stroke of the feed-arm 3, and of the pawl in engagement with theI ratchet-wheel 2. ln this way and by adjusting the screw 30 the descent of arm 3 is adjustably limited, and as said arm carries the pawl 8 the stroke of said pawl will be varied according to the adjustment of said screw 30 and the feed consequently regulated in accordance withthe amount of lreduction desired; After complete reduction has taken lace, new work has been inserted, and an a( ditional operation is to be performed, the pawl 2% is released by the means -described and the tooth 9 thereof again eninserted the rock-shaft 91 is turned to throw the feeler 66 awa'y from the path of the same and by grasping the handle on the end of the spring latch 17 and moving said latch to the right, it is released from locking engagement this may be readily accomplished by removing any of the

plugs

100, 101, from the contact bushings 98; and 99,*and as before stated it will be im ossible to establish the circuit unless the rig t plugs are 'laced in the bushings having openings of r ifferent diameters for their reception.

Changes may be made in various details of the mechanism without departure from the spirit thereof, and while shown applied for use to a metal reducing machine the invention is limited to no special use, nor to employment with any particular material.

Various means .may be employed for clamping the base 43 to the reciprocatory bed 40, the invention not being limited to the" devices described. So too, other means may be utilized for raising the lever carrying the feeler and various kindsof contact-devices maybe employed as substitutes for those shown if'desired.

H avingthus described my invention, what I claim is- 1. The combination', with a feeler adapted to engage lwork to be reduced, of a movable device on which the feeler is mounted; a contact-point carriedl by the device; levers pivoted beyond said contact-point; contact-` `plugs carried by said levers; feed-mechanism; an'electric-circuit; and means for disconnecting said feed-mechanism when the said circuit is established.

2. In mechanism of the class described, thev combination, with a pivoted angle-lever, of a feeler carried by one arm of said anglelever; a contactoint carried lby the other arm of said ang e-lever; movably-mounted devices having plugs; an electric-circuit; a support having an insulatedcontactoint adapted to engage one of the contacts of said movable devices; ffeed mechanism; means for actuating saidfeed-mechanism; and electrically-controlled devices for withdrawing the means for actuating the feed-mechanism.

3. The combination, with a slide, of an angle-lever. pivoted to saidslide; a feeler carried by one arm of the angle-lever; a contact-point carried by the other arm of said angle-lever; a support; weighted levers pivoted to said support; contact-points carried carried by said pivoted lever; an electriccircuit; a feed-element; and means controlled by'the Ielectric-circuit vwhen the contactpoint of the angle-lever engages the contactdevice of said pivoted lever for controlling said feed-element.

5.'The combination, with a feeler, and

with me ans for movab'ly supporting the same,-

of a contact-point carried by said means; a pair of pivoted levers; a contact-device carried b'y each of said levers; a circuit; a feedelenient; and meanscontrolled by the circuit for actuating said feed element.

6. The combination, with a swinging arm, of a pawl carried by said arm; a feed-element actuated by said pawl; astop movablebeneath an extension of said arm ;v and electrically-actuated devices for operating said stop.

7. The combination,'with a ratchet feedelement, of a swinging arm; a pawl carried by said arm, and engaging the ratchet feedi element; an electro-magnet for withdrawing the pawl; and means for throwing the pawl into engagement with the ratchet feed-element when the magnet is denergized.

8. The combination, with a feed-element, and with means for actuating the same, of a stop for limiting the movement of said feedelement, and electrically-controlled devices for actuating said stop.

'9. The combination, with a feed-element, and with a swinging support, of means carried by the support for engaging said feedelement'; a stop movable b eneathl the support; a pivoted lever carrying said stop; and means for actuating said lever.

10. The combination7 with a feed-element; and With a swinging support,of means carriedI by the support for engaging said feede'lement; a sto movable beneath the support; a pivoter lever carrying said stop; an

'armature carried by said lever; and a magnet for actuating said lever.

1]. The combination, with a feed-element,

and with a swinging support, ofmeans carried by the support for `engaging said feedelement; a sto movable beneath the support; a pivoter lever carrying said stop; an armature carried by said lever; a magnet for actuating said lever; and a spring for returning said lever. i

12. The combination, with a carrier, of a feeler on said carrier; a air of contactpoints, one carried by the ever; asupport seaeea for the other contact-point; anjelectric-circuit; a feed-element; a device for actuating said feed-element; an electro-magnet in the circuit; and a stop movable beneath an element of the device 'for actuating the feed-element, and controlled by said electro-magnet.

13. The combination, with a ratchet feed element, of a swinging arni; a pawl carried by said arm; an electro-magnet carried by the arm for withdrawing the pawl; a circuit for energizing the magnet; and aA catch for retaining the awl'when'disengaged from the ratchet feed-e ement.

14. The combination, with a support, of an angle-lever pivoted thereto and one Aarm of which is longer than the other; a feeler carried by the short-arm of said angle-lever; a contact point mountedl in the long arm of said angle-lever; a pivoted lever, a c0ntact.

\ tric-circuit feed-mechanism means actuated by said circuit for controlling the action of said feed-mechanism; a second-circuit means for establishing said second-circuit at a predetermined point; and means controlled by said second-.circuit when established for throwing the feed-mechanism out of action.

16. The combination, with a slide, and with means for adjusting the same of an angle-lever pivoted to the slide; a feeler carried by one arm of said angle-lever; a contactpoint carried by the other end4 of said anglelev'er; a pair of pivoted levers; a contactpoint carried by one of said levers, and electrically-connect'ed with part of the slide; an

insulated contact-point carried by the other pivoted lever; electric-circuits; feed-mechanism; means actuated by oiie electric-circuit, when established for regulating the movement of said feed-mechanism; and means actuated by the establishment of the other electric-circuit'for stopping said feed-mechanism.

17. The combination, with apivoted anglelever having long and short arms, of a contact-point carried'by the long arm of said lever; a feeler carriedl by the other arm of said lever; electric-circuits; mechanisms controlled by the contact-point on the anglelever for establishing said circuits; and feedinechanism controlled and thrown out of action by the respective circuits.

18. The combination, with a shaft, of a ratchet-Wheel secured thereto; a swinging arm mounted on the shaft adjacent to said ratchet-wheel; a pawl carried by saidswinging arm, and having a tooth engaging said ratchet-wheel; aslotted connection'for actuating the ,swinging arm; an electro-magnet carried by a part of the' arm; means for energizing said'magnet; an armature carried by the pawl; and a latch for locking the pawl when its tooth is withdrawn from the ratchetwheel.

19.The combination, with a shaft, of a rachet wheel. mounted thereon; an arm sleeved upon the shaft adjacent to the ratchetwheel; a pawl carried by said arm; vand va slotted connection for. actuating said swinging-arm.

20. The combination, with 'a shaft, of a rachet-wheel rigid therewith, a lever sleeved upon the shaft adjacent to said rachet-wheel; a wrist-pin carried by the-lever; a pawl pivoted to the lever; and alreciprocatory rod slotted at its end to receive the wrist-pin.

21. The combination, with va shaft, of a ratchet-wheel actuated thereby; an arm mounted for swinging movement upon the shaft; a Wrist-pin carried by the arm; a reciprocatory rod having a slot in whichv the Wrist-pin is received; a pawl carried by the arm; and means for regulating Vthe. feedmovernent of said arm. v

'22. The combination, with afeed-element, of a swinging arm; means carried byv said arm foractuating said feed-element; and a stop movable beneath the arm, and adjustable to limit the motionof said arm.

23. The combination, witha feed-element, of an arm mounted for swinging movement;

means carried by the arm for actuating thev feed-element; a lever; an armature on said lever; an adjustable stop carried by the lever; an electro-magnet coperating with the armature, and adapted to throw theedjustable stop beneath a portionfof the swinging` arm, and thus limit the feed-movement.

24. The combination, with a ratchet-feed element, of a swinging arm; a pawl carried by said arm, and in engagement with said ratchet feed-element; an armature carried! by the pawl; an electro-magnet coperatlng with the armature to-withdraw the pawl; and a latch for engaging the armature, and holding the pawl out of contact with the ratchet-feed-element.

' 25.' The combination, with a ratchet-feedelement, of a swinging arm; a pawl carried by said arm, and in engagement with sald with the armature to withdraw the pawl; a latch for engagingl the armature, and holding the pawl out of contact with the ratchet-feed element; and a spring for returning the pawl when the latch is released.

26. The combination, with a ratchet feed- .ratchet feed-element; anv armature carried by the pawl; an electro-magnet cooperating element, of a swinging arm; a paWl pivoted a spring-latch-for engaging the armature; an electro-magnet carried by the swinging-arm; and a 'circuit for energizing said magnet, and thereby releasing the pawl from contact With the ratchet-feed-elernent. I

27. Thecombination, with a ratchet-feedf element, of a swinging arm; a pawl carried 'by said arm; a pivoted lever; astop adjuste on said lever; an armature carried by the lever; an electro-magnet for attracting the armature when energized; and a circuit for energizing said magnet, and thus thrown ing the adjustables'top beneath a part of the swinging'arni to control the feed-movement.

28; The combination, with a ratchet feedelement, of a shaft carrying said element; an arm sleeved upon the shaft adjacent to-said element; a pawl pivoted to the arm; means for holding the pawl in contact With. said element; an armature'carried by the pawl; an

electro-magnet; a circuit for energizing saidl magnet; means for locking the paWl out of engagement with the feed-element; a piv oted lever; a stop on said lever; an armature also carried by the lever; an electromagnet for attracting said armature; a circuit leading 'to said magnet; and means for returning said pivoted lever andadjustablestop. v

29. The combination, with a shaft, of a ratchet feed-element carried by said shaft; an arm sleeved upon the shaft adjacent tol said feed-element; means for actuating the arm; a paWl pivoted to the arm; an extension on the arm; an adjustable stop located beneath said extension; a pivoted lever;

,means for actuating said lever; and an ad- 'ried by the arm, and in engagement with the ratchet-feed-element; an armature carried by the pawl; an electro-magnet located on a portion ofthe arm beneath said armature; means for energizing the magnet to cause it, to withdraw the pawl froni'engagement with the feed-element; and a latch forvsaidmeans. In testimony whereof 'l a'ltix'my signature in presence of tWo witnesses at Hartford, Conn., this 16th day of Februa 1906.

v BENGT M. W.` ANSON. Witnesses: l

ARTHUR E. THAYER, H. E. BAILEY.