US1515790A - Timer cap - Google Patents

Description

l. ,Il

Nqv. 1,8, 1924 1,515,790

N. B. PARSONS TIMER CAP Filed March 8, 1920 lil Patented Nov. 1.8, 1924.

UNITED STATESl PATENT OFFICE i NEWELL B. PARSONS, OF LA GRANGE, ILLINOIS, ASSIGNOR TO JOHN W. OLSON, 0F CHICAGO, ILLINOIS.

TIMER CA?.

Application led March 8, 1920.

To f/,ZZ whom it may concern.'

Be it known that I, NnwnLL B. PARSONS, a citizen of the United States, and a resident of the city of La Grange, county of Cook, and State of Illinois, have invented certain new and useful 'Improvements in Timer Caps, of which the following is a specification.

My invention relates to improvements in timer caps and is of particular value in connection with timer caps such as are used on Fords, the ignition circuits of which are so arranged that the low tension current coming from the battery or the magneto is interrupted and also distributed through a series of relatively stationary contacts in conjunction with a revolving brush, said contacts, however, being capable of a limited amount of angular adjustment around the axis of rotation of the brush to enable the spark to be advanced or retarded as occasion requires.

The principal objects of the invention are to provide improved means for enclosing the electrical connections in order to prevent short circuiting; to provide improved means for positioning in the cap of the timer a member which supports a series of contacts over which the brush travels; to provide improved means for housing the end of the cable and the individual wires leading therefrom to the contact connections; to provide a construction which shall be simple in design and economical to manu facture. while being etiicient in operation and inexpensive to maintain, and keep in repair, and in general to provide an improved timer construction of the character referred to.

rlhe invention will be best understood by reference to the accompanying drawings forming a part. of this specification, and in which,

Fig. 1, is a top plan view of my invention,

Fig. 2, is a sectional view taken on substantially line 2 2 of Fig. l, and

Fig. 3, a sectional view taken on substantially line 33 of Fig. 1.

In the use of timers or commutators, a cap is provided into which project wires respectively leading to the low tension sides of the spark coils, the high tension windings of which are respectively connected to the spark plugs of the engine. Great difficulty has been experienced With the use of the itself.

Serial No. 364,028.

timer cap now in use, for the reason thatthe connection at the terminal post, which is secured in the timer cap itself, often becomes loose and causes an irregular delivery of electric current to the spark plug. In my invention a more positive connection is made between the terminal post used in the timer cap and the wire leading therefrom. To accomplish this I provide a timer cap 6, which is provided, adjacent its rim, with a flange 7. Projecting vertically from the flange 7 is a flange 8. Formed in thc flange 7 is a circumferential groove 9. Formed upon the cap are bosses 10, each of which is provided with a recess 11. A fibre or insulating ring 12 is provided, in which is imbedded, at intervals, contact blocks or plugs 13, these plugs extending inwardly relatively to the ring so as to lie flush with the inner surfaceV of the ring Terminal posts 14 are projected through passages formed in the cap 6 and threaded into the members 13. Engaging in the groove 9 is a cable 15, in which the wires 16 which connect with the spark plugs of the engine are insulated. Communicat ing with the recess 11 and with the groove 9 is an upwardly inclined passage 17, in which one end of the wire 16 is projected. The extreme end of the wire 16, which is free from insulation, is securely clamped against the insulating cap (i by means of the terminal 14: which is constructed in the form of a screw having ari enlarged head on one end. Anr extension 19 is mounted upon the member G, and preferably made integral therewith, which forms a passage for the cable 15.

My invention is designed for use with gasoline engines, tractors, acroplanes and automobiles, and principally those of the Ford type, the cap 6 being adapted for use with a timer or commutator rordinarily used. The timer may be rocked on a motor casing by means of a lug 23 which has an opening 211 through which the pin of an actuating rod or link may be inserted. An arm 21 is rigidly mounted upon the forward end of the timer shaft 20, and at the free end of the arm 21 a roller 22 is secured, which is adapted to contact with the inner surface of the ring 12 and also with the contact blocks 13 when passing overy the point in the ring to which the same are secured.

My invention resides principally in providing the inclined passage 17 in the boss 10, so as to provide a means for securing the end of the member 16 in close connection with the member' 14; by looping` the samel around the upper end thereof and then clamping the looped end against the member 6. With the timer caps as noiv in use, the end 1G of the Wire which connects 'the terminal post With the spark plus; lies in the groove 9 and is looped around the pest le at that portion of the post which projects through the groove 9. The Wire is then soldered to the post and the connection thus established. In use, however, this soldered connection becomes broken and the wire lo is permitted to vibrate on the member lll, and at intervals no connection is established between the member la and the Wire 1G. By securely clamping the Wire against the member lll in the manner already described, a positive connection is established at all times, and a more efficient structure results.

The cap is preferably made of a phenol condensation or other suitable dielectric and is formed by moldingthe same to tue necessary shape. By constructing the cap in this manner and from this material, a simple and economical cap is provided.

lVhile I have illustrated and described the preferred form of construction for carrying` my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not Wish to be limited 'to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come ivithin the scope of the appended claims.

Having described my invention, vrhat I claim as new and desire to secure by Letters Patent is l. A device of the class described cornprisina a cupshaped cap; a flange formed on said cap adjacent the rim havinga groove therein; and a passage for the inser tion of a terminal post, there being a passage connecting' said lgroove with said terminal post passage, substantially as described.

2. In a timer, a cap having a groove formed therein; an insulator ring; contact members on said ring; terminal posts engagging' said contact members; and Wires leading through inclined passages from said groove to the outer ends of said terminals, substantially as described.

3. In a timer, a cap having a ,groove pro-- vided with outwardly inclined passages leading to terminal posts in said cap; and a cable disposed in said groove and having Wires leading; through said passages to said terminal posts, substantially as described.

4. In a` timer, a cap having` a groove; and a boss on said cap having a recess therein, there being an inclined passage connecting,`

' recesses in said bosses iviith said groove, substantially as described.

b. In a timer, a cap molded from a dielectric, and having a groove therein; a boss on said cap having;` a recess therein, there being` a passage in said cap connecting said recess with said `groove, substantially as de* scribed.

7. In a timer, a cup-shaped cap having a groove and inclined passages leadingl from the groove, an insulatingl ring); adjacent said groove, spaced metallic contact plates in said ring, terminal posts having,r their inner ends engaging said contacts, and Wires leadingl from a cable in said `groove and through the inclined passages in said cap to the outer end of each of the terminal posts, substantially as described.

8. In a timer, a cap having a groove formed therein; an insulator ring; contact `members mounted in said ring; terminal posts having' their inner ends threaded into said contact members; and wires leading through inclined passages from said groove to the outer ends of said terminals and bcingr clamped thercbencath.

In a timer of the class described, the combinaltion of a hollow cap havingv an open end and a closed end. an insulator track member insertable and removable through the open end ofthe cap, contacts carried by said track member, and track fastenings carried by the cap and detachably connected with the ltrack member and operable at the erterior of the cap for disconnecting the fastenings from the track member.

l0. In a timer of the class described, the combination of a liolloiv cap having; an open end and a closed end. the open end having; a concentric cylindrical flange constituting' a rotary bearing member for the cap. an insulator track member insel table and removable through the open end of the cap and lying' against the closed end thereof, contacts carried by said track member, and track fastenines carried by the cap and detachably connected with the track member and operable at the exterior of the cap for disconnectino` the fastcnings from the track member.

ll. .In a timer of thi` class descril'ied. 'the combination of a hollow cap body having; an open end and a yclosed end, an insifllator 'track mcmbe' inscrtable and removable tlnouah the open end of the cap, contacts carried by said track member, and track fasteninjrs extending' through lthe cap body and detachably connected with the track for maintaining the latter in place, said fastenl ings being operable at the exterior of the cap tor disconnecting the tastenings 'from the track member.

12. A timer ycomprising a body provided in its inner tace with a groove and also with a circular flange projecting at the inner tace ot the body and oultside ot the groove, the body having a series ot passages extend- `ing from the outer face ot the body and intersecting the groove, the outer end or" each passage being enlarged, a. ring within the circular ange and against the. inner tace of the body, contact members embedded in the ring and tlush with the inner periphery oit' 'the ring, headed terminals extending through the passages and connected with the respective contacts, the heads of the terminals lying in the enlarged outer ends oit the passage, there being a branch passage leading from the groove to the enlarged outer end portion ot each ot the lirslt mentioned passages, and conductors lying in the groove, the terminal ot each conductor eX- tending through one of the branch passages and engaged with one ot the terminals and clamped between the head thereof and the vback ot the enlarged portion ot the adjacent passage.

13. A timer comprising a body provided in its inner tace with a groove, passages in tersecting the groove and terminating in enlargements at the outer tace of the body, headed terminals extending through the passages and through the groove, branch passages leading trom the groove to the enlarged outer end of each of the first mentioned passages, and conductors lying in the groove, the terminal ot each condudtor ei;- tending through one ot the branch passages and engaged with one ot the terminals and clamped between the head ot the latter and the back wall oit lthe enlarged portion ot the passage.

lll. A timer comprising a body provided in its inner tace with a groove, a series oi. bosses on the outer -tace of the body and in alignment with thc groove, the body being provided with passages extending through the bosses and intersecting the groove, the outer end ot each passage `teri'ninating` in au enlargement at the outer la'ce of the adjacent boss, the body also being provided with a branch passage extending through each boss and leading lrom the groove to the enlarged passage portion in the boss, headed terminals extending through the passages with their heads in the enlarged portions thereof, and conductors lying in the groove, the terminal of each conductor extending through one of the branch passages and being engaged with the adjacent terminal member and clamped between lthe head thereof and the back ot the enlarged portion of the passage.

15. A timer cap, comprising cap body provided in its under tace with a groove, a depending circular liange outside oit the groove, there being a series ot open topped terminal-passages extending downwardly through the cap and intersecting the groove, the top of each terminal passage and the groove being connected by a branch passage, a removable ring ott insulating material lying against the botitom face of thel cap and closing the groove, a series ot contact elements embedded in the ring and flush with the inner periphery the-reet, Lfastenings securing the contacts with lthe ring, headed terminals in the terminal-passages and having their heads at the. outer ends ot said passages and said heads being accessible at the top ot the cap, the lower ends of lthe headed terminals being screw threaded into the respective contacts and securing the ring to the cap, and conductors lying in the groove, the terminal portion of each conductor extending through the branch passage and into engagement with the adjacentheaded lterminals and clamped between the head thereofv and the cap.

16. A timer cap, comprising a cap member, an insulating ring member at the bottom oit the cap member and carrying a series of contacts, one ot said members having an annular'groove, a series ot headed terminals extending downwardly through the cap and intersecting the groove and connected with the respective contacts, the heads ot the said terminals being accessible at the top ot the cap, there being a branch groove leading trom the annular groove to the head ot each terminal, and conductors lying in the groove, the terminal portion of each conductor eX- tending through one ot the branch passages to the adjacent terminal member and clamped between the head ot the terminal member and the cap.

17. A timer cap, comprising a cap bod),l provided with an outwardly directed peripheral flange at the base ot the cap, a cylindrical 'flange dej'iending from the 'first mentioned Hange, the bottom 'lace ot the first mentioned 'flange having an annular groove provided with a lateral entrance, an insulatingring fitting the interior ot the cylindrical flange and closing the open bottom ot the groove, the cylindrical :flange projecting below the ring and constituting a rotary bearing member lor the cap, a series oi contacts embedded in and secured to the ring and lying between the latter and the bottom of the cap and also flush with the inner periphery of the ring, each contact underlying the groove of the cap, headed terminal members extending downwardly through the tirst mentioned flange and through the groove and having screw threaded connections with the respective contacts, the head ot each terminal member being accessible at the top ot' the i'irst mentioned flange, there being a branch. passage leading 'from the groove to the head cl" each terminal rnei'iiber, and conductors lying in the groeve and ez;- tending through the entre; portion thereol, the terminal ol each conductor extending through one oit the branch passages and clamped between the head ci the adjz'tcent tern'iinal and a portion ot the tiret mentioned flange.

18. In a timer ol1 the combination oli a holler: D an end a closed end7 an insel tor b ack member insertalgile and removable through the open end et the cap, contacts carried by said track member, and disconnectible lastenings for securing 'the track member to the cap, said tastenings capable et c '.sconnection Without displacing` the contacts and also operable at the exterior et the cap for disconnecting the astenings from the tracl; meinN ber.

19. In a timer of the combination ott a hollow end and a closed end, member insertable and the open end ot the cap, contacts carried by said track member, and binding posts asseciated with the contacts and projecting if n the back of the tracl; member tcivar the closed end of the capn there being a space back of the track inemlgier to receive conductors leading to the binding pests, said can having an entrance opening leading to the said space.

20. In a timer, the combination of a rotary timer shaft, a hollow cao having an open end and a closed end and enclosing the end o'l" said shaft, a brush carried by said shaft7 a track of insulating material having contacts permanently embedded therein and engageable successively by the brush as the latter' class described, the cap liaving an open an :insulator track removable through rotates with the shalt, said tra 1li being inand admit said cable, and binding posts projecting from the baci: of the track for detachably connecting the ends of said conductors to said contacts.

2l. In a timer, the combination of a rotary timer slia'lit, a hollen cap having an open end and closed end and enclosing the outer end or said sha'lft, a brash carried by said shaft, a track unit olf insulating material having contacts permanently embedded therein, said unit being insertable through the open end of the cap and removably' seated against the end ott the cap, said contacts being engageable successively by the brush as the latter rotates with the shaft, a cable including a set o'lf condiiictors Yfor leading cnrrent 'from said contacts to the sparking de' vices7 there being space between the closed end of the cap and the track unit for receiving said conductors, the cap also being ap- Veratnred to receive and admit said cable, and

screws projecting from the back of the track nnit and threaded into back portions et said contacts and having heads 1ander which the ends of said conductors are clamped.

In testimony whereof I have signed my name to this specification in the `presence oi two subscribing Witnesses.

NEIVELL B. PARSONS. fitnesses MARY E. KEARNEY, BROWER MURPHY.

Images