US1436436A - Device for grinding contact points - Google Patents

Description

H. J. POOLE AND S. E. COUCH.

DEVICE FOR GRINDING CONTACT POINTS.

APPLICATION FILED MAY 24. I920.

1,436,436. Patented v. 21, 1922.

3 SHEETS -SHEET I.

myz,

INVENTORS, 61E. Caaciz md By Ed Poole,

A TTORAIE Y H. J. POOLE AND S. E. COUCH.

DEVICE FOR GRINDING CONTACT POINTS.

APPLICATION FILED MAY 24, 1920.

1,436,436, Patented NOV. 21, 1922.

3 SHEETSSHEET 2.

.1, :4 (I; k E

l' 2 i r E 3 INVENTORS, 131E. 601466, and BY HJ P00 Z6,

H. J. POOLE AND S. E. COUCH.

DEVICE FOR GRINDING CONTACT POINTS.

APPLICATION FILED MAY 24, I920.

1,43 ,43 Patented Nov. 21, 1922 3 SHEETS-SHEET 3.

INVENTORS, 151E. C 0uck,arid

H cl Poole,

A TTO'RNE Y Patented ov. 21, 1922.

Human a. POQLE AND STEPHEN E. CQUCHfOF SPRINGFIELD, MASSACHUSETTS;

1 SAID COUCH ASSIGNOR TO SAID POOLE.

V nnvrcn non cnmmne comncr rom rs.

Application flied May 24,

To all whom it may concern: j v

Beit known that we, HOMER J. POOLE and STEPHEN E. CoUoH, citizens of the United.

States of America residing at Springfield, in the county of l-Iampden and Commonwealth of Massachusetts, have invented cer-v tain new and useful Improvements ,in Devices for Grinding Contact Points, of which the following is a specification.

, This invention relates to improvements in devices for grindingor trueing the contact the distributor buttons or plates ignition systems which-are used for igniting the charge in internal combustion engines. 1

Broadly, the invention discloses the use points and of electrical of 'abase plate or receiving platform, adapted to be adjusted to any suitable height and for receiving the jig or blockon which the contact points are placed, whereby when the base piece or platform is moved upward, the

I the manner of adjusting the front and rear edges of the supporting platform or plate.

contact pointsare brought against the surface of a grindingor'trueing wheeL. It is well known that the contact points are composed of very hard material, as tungsten steel, which cannot be accurately truedwith a file.

An object of the invention is to provide jigs-for holding andreceiving the fixed and movable contact points of variousignition systems, as Delco, Atwater Kent, Ford. Remy, Connecticut, etc., but all capable of bein' used in connection with one common grin ing wheel.

Referring to the drawin s:

Fig. 1' is a planview 6 the jig-receiving platform showing an electric motor, a'grinding wheel, the upper surface of the platform, and in dotted lines the means for adjusting the platform. A

Fig. 2 is a side elevational view of Fig. 1, showing the device as used, the wheel being shown in the act of grinding the contacts, also the means for accurately raising and lowering the jigs. v

Fig. 3 is a side elevational view partly in section on the line 3-3'iof Fig. 1,;showing clearly Fig. 4 is a detail view of one of the jig blocks for receiving the fixed contact points I of the make and .break devices and the distributor button. i Fig. 5 is a perspective detail view of the jig device forreceiving andholchng the con- 1920. Serial No. 383,875

tact points of the well-known Atwater Kent system. I

Fig. 6 is a erspective detail view of the block or jig or holding the flexible plates which the contact points of the Ford system are secured.

Fig. 7 is a detail view of the block or jig for receiving and holding the Connecticut system of ignition. Fig. 8 is a detail view 0 the jig or block for holding the Remy contact points. Fig. 9 is the blockfor receivmg and hold ingl the contact points of the Delco svstem. eferrmg to the drawings in detail: The base member on which thevertically adjustable plate is mounted, is indicated at 1. This member is provided at the front edge thereof with a threaded bolt 2, a nut 3 for rais- .ing or lowering the bolt, and the jig-receiv- 1ng platform 4 to which it is attached at its" upper end, as indicated at 5. I The rear edge of the plate 4 is pivotally connected to the two rods 6 as indicated at 4' and 4 which are formed with the openings 7 for receivlng an adjusting pin 8, whereby the height of the rods 6 and the plate. 4 may be easily varied. The upper ends of these rods are connected to the plate 4 by means of the pintle 9 which passes through openings in the rods 6 and ears 10 on the plate. A suitable electric motor is indicated at 11, the shaft of which is shown at 12. To the outer end is secured the grindingiwheel 13. This 7 wheel is located in a suitable case 14 for puron and'ofi from the motor is indicated 'at 16.

Referring now to Fig. 4 which illustrates the jig or block for holding the contact points and "the distributor button while hemg ound.- This'block-comprises the base portlon 17, the'integral upright member 18 formed with the threaded openings 19.

These openings are for the purpose of receivingthe usual fixed make and break contact points 20 against which the contact point of the usual movable arm strikes. This point is threaded into either one of the openings 19 and is locked in position by means of the nut 21. 22is an opening in the up-" right portion 18 for receiving the distributor button 23. To grind these points the jig or block .17 is placed on the adjustable latform 4, as shown in Fig. 3. The plat orm is then raised to the desired height so that the points 20 and button 23 barely strlke the periphery or the grindingwheel 13. The operator then moves the block 17 back and forth under the wheel by sliding the block on the platform 4. This platform is accurately raised or adjusted by means of the graduated nut 3. The amount thatthe wheel 3 is rotated is indicated by the pointer 24.

' Referring now to Fig. 5 which is a jig or biock having aplatform portion 25, an upright member 26. In this member 1s an opening 27 to receive the contact point 28 which is to be ground and which is clamped in the opening 27 by means of the set-screw 29. The opposite end of the platform 18 formed with an. upright member 30 hav ng an inclined portion 31 and a iedge portion 32 in which is secured the threaded p111 33. The spring contact plate indicated at 341:; placed on thefportions 31 and 32. The U- shaped end .35 is placed over and against the pin 33. Also placed over thispm IS the U-shaped piece 36 and the whole is then secured together by means of the nut 37. For the purpose of holding the contact point 38 in rigid position while being ground, a wedge shaped block 39 is slipped or pushed into the opening 40. The jig or block is now placed on the adjustable platform 4 and the contact points 28 and 38 are ground in the manner alread described. This jig structure is for receiving and holding the contact points of the Atwater Kent system. Referring to Fig. 6, the jig or block is indicated as a whole by the numeral 41. It 'is formed with' two upright portions 42 and 43. The portion 42 formed with a flat surface 44 and two; spacedblock pieces 45 having the space 46therebetween. 47 and48 are upwardly extending pins to receive the openings 49 and 50"i11'the plate 51 on which is located the contact point 52. A late 53 also fits over the pins 47 and .48 an a nut ,(not shown) isthen threadedonto the pm 48 to retain the plate 51 rigidly in place on the block 42. Forthe purpose of attaching the other part of the make and break device, as indicated at 54, with the contact point 55 which is located on the spring plate 56, two

upwardly extending threaded pins 55" are is placedupon the upper surface 58 of thelocated on the upper end of the part 43 to receive the openings 57 of the plate 54, which part 43' and between the spaced pieces "59 and secured in lace by threading nuts onto the pins 55. T 0 two contact-points 52 and 55 may therefore be ground by placing the block or jig 41 on the adjustable platform 4 and then grinding them I as already de-- scribed. This jig is used for grindin' the make and break points whichare use for' the Ford ignition s stemzf, I

. Fig. 7,, showsa b 001: 0 jig which/isused 5 Whatwe claim is: 11'. A, jig. or block member p v. "holding the contact points of. an 1 smi hs-m a l W 8 31 8 4 in the Connecticut system of electrical ig-' nition. 60 designates the base part, 61 the upright having the opening 62 to receive the v fixed contact point 63'. 64 designates a U- shaped piece that is secured to the part 81- by means of the screws 65. 66 is a plate usual arc-shaped piece which is placed on the pin 88 and theroller 68 in the recessed part 69. The contact points 63 and 70 are then ground as already described.

Fig.8 represents the jig or block for grinding the contact points of the Remy systom. '21 is the base-piece, 72. and 73 the integral upright portions. The portion 72 is formed with an opening 72' therein, for receiving the pin 78 of the arm 74. The part 74 of the arm rests in the recess 75 of the part 7 3 whereby the contact point 76 is rigidly held in place for grinding. The other contact oint 7 8 is threaded into the opening 78' and t en locked in place with the nut 80. The whole is then placed on the adjustable platform 4 for grinding.

Fig. 9 shows a jlg or block for grinding the contact points of the so-called Delcc system of ignition. 81 designateslthe base piece having the upwardly extending portions 82, 83, and 84. The portion 82 1s provided with a pin 82 to receive the opening '85 of the breaker arm or lever 86 having passed through the openings 84' and 84 to retain the arm in place. 90 designates a blo k that 1s placed in the space 91 and which rests 1n the notched recesses 92 to prevent the point 93 from being depressed or bent downwardly while being ground.

It will be seen from this description that we have produced a device or mechanism for accurately and rapidly grinding the makeand break contact points of electrical ignition" systems of various types or forms.

It should be observed that the upright or extension portions ini'which the contacts, distributor. buttons, and the movable arm are placed, are all of substantially equal distancesdrom the bottom of the base piece, whereby the grinding will be uniform on all of the contacts, buttons, and the contact on the movable arm. The contact supportedfwhile'being ground; j 4

for temporarily 'tion system whlle' being ground, said bloc comthat is also secured to the piece 64. 67 is the art of the movable arm is directly and-rigi y I" I prising a base-piece having a raised portion with openings therein to receive the usual fixed contact points and the distributor button, and another raised portionspaced from the fixed contact receiving portions and adapted to receive the movable member of the contact device.

2. A device for temporarily holding and retaining the contact points of an ignition system while being ground and comprising a block formed with spaced upwardly extending channeled portions to receive said points, as describe a 3. A device for the purpose described comprising a base-portion with spaced integral uprights having openings therein to receive and retain the fixed contacts, and means including other uprights to receive the movable contact carrying members, whereby both of said contacts may be simultaneously ground while so held or retained.

4. A jig or block device for the purpose described, having recessed or grooved upwardly extending portions to receive a movable contact carrying arm, and pin devices in the extension for retaining said arm in the grooved or recessed portions.

'5. A jig or block device formed with a base piece and an upright or extension part having 0 enings therein to receive and retain in p ace ignition contact points while being ground, as described.

6. A jig device for holding electrical contact points, distributor buttons and the contact pointon the movable member of ignition systems while being ground, said device including a base part and spaced extension pieces to receive the points, buttons, and movable member, said pleces being substantially an equal distance from the baseart, whereby the grinding operation will e of uniform character.

A HOMER J. POOLE.

STEPHEN E. COUCH.

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