US1538869A - Timer - Google Patents

Description

May 19, 1925. 1,538,869

H. w. MUHLEISEN TIMER Filed Feb; 7, 1921 llllla'ldlll'.

HENRYWMU/ILE/SEW,

JNVENTORSJ' W If L HI. ATTORNEYS. I

Patented May 19, 1925.

UNITED STATES PATENT OFFICE.

HENRY W. MUHLEISEN, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO W. 'S. RUSH & 00., OF LOS ANGELES, CALIFORNIA, A PARTNERSHIP CONSISTING OF W. S. RUSH,

E. S. RUSH, AND B. C. GRAVES.

TIMER.

Application filed February 7, 1921.

To all whom it may concern Be it known that I, HENRY W. Morn.- EISEN, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles, and State of California, have invented new and useful Improvements in Timers, of which the following is a specification.

My invention relates to a timer or commutator for use in connection with multicylinder engines.

The object of my invention is to provide a timer of the Ford type that will be simple in Fig. 1 is a plan View of a timer, embody-v ing the principles of my invention, with part of the casing broken away and shown 1n section. i

Fig. 2 is a view in side elevation of the timer shown in Fig. 1 with parts broken awa and shown in section.

Fig. 3 is a detailed sectional view on the line 33 in Fig. 1, showing the contact roller, its mounting parts and its cont-rolling spring.

Fig. 4 is a section through the roller and track.

' The timer is of a Ford type and comprises a casing 10 within which is fixed an insulating ring 11 in which contact plates 12 are embedded. These contact plates connect with binding posts 13, the binding posts being insulated from the casing by bushings 14. A cam shaft 15 turns in the center of the casing. A sleeve 16 having two parallel radial bearing lugs 17 and 18 formed integral with it is keyed to the cam shaft within the casing and is held thereon by a nut 19, which screws on the end of the shaft. A roller arm 20 having a pivot pin 21 at one end which extends through the bearing lugs 17 and 18 has a pivot screw 22 fixed in its free end upon which a flanged roller 23 is Serial No. 443,067.

mounted, the head 24 of the pivot screw serving to hold the roller in place. As shown in Fig. 2, roller 23 is adapted to travel'inside the insulating ring 11 and contact with contact plates 12. It has an end flange 25 adapted to press against the inner edge 26 of the insulating ring 11. A retractile coil spring 27 having one end fixed in bearing lug 17 and the other in the pivot pin 21 serves the double purpose of holding the roller 23 against the insulating ringll and contact plates 12 by its unwinding tension and holding the flange 25 against the edges of the insulating ring 11 and contact plates 12 by its retractile tension, the latter acting to withdraw pivot pin 21 from bearing lugs 17 and 18.

Operation: As the cam shaft 15 turns 11' the direction indicated by the arow a, the sleeve 16 and bearing lugs 17 and 18 formed integral therewith are carried around with it. The roller arm 20 pivoted in lugs 17 and 18 and the roller 23 attached thereto are thus caused to revolve around the cam shaft. The spring acts through the roller arm to press the roller against the inner periphery of the insulating ring 11 and the contact plates 12, in the direction indicated by arrow I), by its unwinding tension and at the same time acts to press the roller flange 25 against the inner edges of the insulating ring 11 and contact plates 12 in the direction indicated by arrow 0 by its retractile tension. A rolling contact is thus produced between the roller and plate faces while a combined rolling and sliding contact is produced between the roller flange and the edges of the contact plates. This combined rolling and sliding contact insures a bright contact surface and a consequent reliable electrical connection.

While I have shown the preferred construction of my timer as now known to me, it will be understood that various changes in the construction, combination and arrangement of parts may be made by those skilled in the art without departing from the spirit of my invention as claimed.

I claim as my invention:

1. A timer, comprising a casing; an insulating ring fixed in the casing; contact plates embedded in the insulating ring; binding posts connected to the contact plates; a cam shaft rotatably mounted through the center of the casing; a sleeve a In a timer, the combination of: con keyedjupon the oam shaft within thdwaetacts ha ving homologous 'po'inte in a commg; two radial hearing lugs extending from men circle; members rotating about the the sleeve; a roller arm fitting against the axis of said circle; a cylindrical roll-er inn outer 'faceofonelug; apivot pin extending side 'said circle havin mfian 'e; and lneans from the roller arm through the-lugs for :"so "mounting said 'roller on said memr'oller carried by the roller arm and adapted hers tliat it l nov'es* ra dially to ihake contact ,to travel inside of the insulating ring and on its cylindrical surface with said conengage the contact plates, and having an tacts and along its own axis to make elec- F end flange adapted'to pressuagainst the trical contact on-its flange with said coninner edge of the insulating ring; and a tacts. "coil sprin mounted upon '-thepivot:pin-'- be- 5. In a timer," the 'com'bination ofz contween the eari-ng lugs;one end of the spring tacts havinghomologous points in aicomheing'eonneeted to a iii-guild the other end of *m'on circle; members rotating about the axis 11 the 'spring being connected to" the pivotpin, of said circle; a cylindricalroller inside said the tension of the spri'ng being ekert'ed to -circle having a fiarnge,' "said roller= *be'ing =h0ld the "roller against the insulating {ring formed to conform to theshapeof saidconand contact plates and to hold the flange tacts so that the'cylindrical portion thereof against the-edges of the insulating ring and and the flange can simultaneously make a i contact plates. "line contact throughout their wi dtlr with 2; In a timer, the coin'liination ofJQon said contacts;aspindleeupon whichsaid rollducting"sections'insulated f'rom each other er turns; an arm to the outer end 'ofwhich andcooperating td form"ail annular track;' said spindle is secured,"said arm' being pivmem-hers rotating insideand about-meansoted in said members and a spring forcing "of said track; a roller carriedousaid memthe "outer end OfBaid arm towards' said her-s; a 'fia nge on 'said' 'roll'eri' andj m'eans 'circle. 7

"for holding-the periphery" of"'said "roller 6. In a timer, the'combination-ofz a track against the inner surface of said track *and- I having electrically 'conducting sections; a the flange of-said roller against the efdge of 'flanged'rOller adaptedto run on'saidtra'ck, m said track. said roller being formed toconform to the 3.1n a timer, the combination ofz'f'c'on shape of said traclr so that the cyliiidrical ducting sections insulated from each other portion thereof and theflangecan simultaand cooperatingto form at'ra'ck;"members neouslymake a linecontact'throughout their 'frotating' about the axis of'sai-d track; a width with said track;" and means for-forcflanged roller; and meansf'or so mounting mg saidfla'nged'roller against said track.

" said roller on said-members that'- it can In testimony whereof; Ihave hereunto mo ve 'radially to cause its periphery 'toconqlsetmy handat LosAngeles, California, this tfact with the 'inside'of said ti-a'ckand aXialIy QOth day of January, 1921. -'to cause its flange tocontact with 'the' side of sa id track. HENRY W. MUHLEISEN.

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