US1590802A - Commutator for internal-combustion motors - Google Patents

Description

June 29 1926.

1,590,802 w. H. BLATCHLEY COMMUTATOR FOR INTERNAL COMBUSTION MOTORS Filed March 25, 1922 Patented June 29, 1926.

UNITED STATES WILLIAM H. BLATCHLEY, OF PITTSBURGH, PENNSYLVANIA.

COMMUTATOR FOR INTERNAL-COMBUSTION MOTORS.

Application filed Marc 25, 1922. Serial No. 546,827.

This invention relates to the housing for commutators or timers for internal combustion motors. More particularly it relates to improvements in housings for comn'mtators adapted to be used with the standard Ford automobile motor.

The objects of the invention are to sinu plify the construction and improve the functioning of the housing for comnuitators for Ford motors, particularly by rendering such housing oil tight for the purpose of facilitating lubrication. A further object is to provide a commutator housing which will cooperate with a standard gasket pro vided on Ford motors surrounding the end of the cam shaft which drives the commu tator, and also with a fixed spring provided for holding he commutator housing in place on standard Ford motors. A further object is to provide a housing which will he oil-tight, and which will be sealed by coopcrating with standard parts of Ford motor constructions. Other objects and ad antageg of my arrangement will be apparent to those familiar with the art.

Referring to the drawings, Fig. 1 is a central vertical partial section through my commutator housing as applied to a standard Ford motor construction; Fig. 2 is an elevation of the housing with the cover removed; Fig. 3 is a central section of the housing with the cover removed; and i is a central section of the cover cap removed from the housing.

The standard Ford construction of timers comprises an end of the cam shaft 1 extend ing through the wall 2 of the engine block and surrounded by an oil sealing resilient washer 3, exactly as illustrated in Fig. 1. Cooperating with these parts the standard construction comprises a plate having a central opening adapted to slide over the cam shaft and to bear against the washer 3, and an open cup shaped shell adapted to bear against the said washer, and to carry a standard contact ring similar to that illustrated in Fig. 2 of the present drawing.

It will be understood that in use a roller,

contact member is mounted on the cam shaft and makes contact with the contacts 5 as illustrated in Fig. 2. Such construction is standard and therefore is not illustrated. A spring arm 15 fixed in the engine structure has its free end adapted to bear against the shell and to press the shell constantly towards the engine block, and so to hold it in position. one difficulty with such a construction is that oil is not permanently re tained therein, seeping out around the edges of the open shell.

In my construction I have obviated this difficulty, and generally improved upon the arrangement and functioning of the parts of the commutator housing, by the arrangement illustrated in the drawings wherein the housing comprises a substantially cylindri al shell portion 7, carrying intermediate its ends an insulating ring 4 having therein the standard metal contact segments 5, following the usual construction of such commut-ators. The rear wall of the shell 7 is partially closed by a sheet metal back 6, rigidly and tightly attached to the body portion 7 at their meeting edges to form an oil-tight joint. This back wall 6 is indented on its outer side to form a circular recess portion 3, and the central part of this is cut away to form opening 9 adapted to permit passage therethrough of the end of the ram shaft 1, as illustrated in Fig. 1. The portion 8 is adapted to it over and bear against the outer surface of the standard oil retaining washer 3, as illustrated in Fig. 1. Consequently. when the back wall 6 is pressed against the outer face of the washer 3, the portion 8 being of such a depth that the washer is adapted to form the abutment for the rear wall of the commutator housing, an oil-tight closure of the rear wall of the housing is made by cooperation with the said washer 3.

The body portion of the shell at its other 3 end is threaded at 10, to receive a cover cap 16, which in turn is threaded at 11 so as to fit into and form an oil-tight engagement with the shell member 7 as clearly illustrated in Fig. 1. This cap 16 protrudes outward from the threaded portion in a somewhat conical shape, and has a central terminal oil hole 12 therein, this hole being surrounded by an inturned inwardly flared flange 13. This flared flange prevents oil from es aping through the hole, in obvious manner. The spring arm 15 used with the standard Ford commutator has an indented.

portion 17 at its free end, and this protuberance is adapted to fit. into the opening 12 in the cap 16. Consequently, the pressure of the spring at this point serves the double function of sealing the oil hole in the housing, and pressing the housing as a whole towards the block, and consequently of mainand] cining o tight tit bet veen the rear wall 6 thereof and the geslzet 3. Consequently with this arrangement the standard washer 6 and the standard spring member 15 cooperate with my form of housing to form oil seals on each side thereof. There are no other openings in the housing through which oil can escape. it will be understood that a rolling Contact brush is mounted on the cent shat't inside the contact ring t, and. beers the inner periphery the; ringes the chin v is rotated, nie successive contacts with the contact nien'n bers no: it'ly as in the well understood operation oi c nn'intntors of t is type.

In eppl hp; my coniniutetnr hons'ng; to Ford motor, the main b d ineiiber the housing slipped over the end of the can-1 shaft and into Contact with the felt wesher The brush nbl is then sii'p'ped. over the coin shett to i ,per position Contact in the thei scr-aved i oil is introduced to hole 12', and then the shown. at Fig. 1, t the oil hole, and conswntly presr-iing the entire housing; towards the engine block. and conseqnei v making a tight joint between the rear wall 6 and the oil sea-ling washer o.

I claim:

1. A conn'nutzitor cssi provided .Vltl'i' a body end end walls so associated therewith us to form a: lubricant retaining chamber, one 01? sell walls heia lubricant feeding opening: therein, and a stwtionsry spring; arin provided with e protuberance fittin in said opening whereby to close the opening and to resiliently bind the easing into firni contactwith. the ngine.

22'. A; connnntetor casing; provided with a body and endwells so associated therewith as to iorlnlubricant retaining chamber, one of said end walls having a depression therein with a lubricant feeding opening; at the bottom of the depression, and a stationary spring arin provioed with a protuberance fitting in eid opening whereby to close the opening and to resiliently bind the casing into tirin'contact withv the engine.

AL commutator casing provided with a body and end walls so associated therewith as to form a; lubricant retaining chamber,

"ovided with a ed therewith as to torn i a lubricant cheniber, one of sand end walls bovine l d GSSlOB therein with e lubri ant tee bottom of the depressioi, projecting snnn-ier deflect rounding the said opening concave periphery, end a stoti provided with e protuberance t t opening whereby to close the opening and resilie itly force the casing into firni contact with the en 5. A1 connnntetor cesing provided with a cylindrical body and spaced end walls so associated therewith as to form a lubricant iet-einii chamber, one of said end wa ls roving a depression disposed the center thereof with lnbric nt feeding opening at the bottom, of the depression, on i-nward'l} projecting ennnlzir detiectingroundingthe said opening pro-viced with :1 concave periphery, and an anchored springarm provided with a protuberance fitting in said opening whereby to close the opening and to resilient y press the easing into i 7 contact with th engine to position the seen.

6-. A connnntetor housing tor combustion motors comprising a shell having an int back well closed except for an opening adapted to i t over the end of the con iniutetor driving shaft, a screw cap adopted to enclose the other side of the shell, said screw cap projecting outward and having a central oil hole tliierein a spring normally press-- ing against thescrew cap and sealing the oil hole, and a: resilient r: sher surroundingthe driving shaft and positioned between the rear wall of the housing and the engine block and spacing the housing therefrom.

Signed by me at Pittsburgh, Pennsylvania, this 23rd day oat March, 1 22.

WILLIAM H. BLATGHLE-Y.

Images