US1984276A

US1984276A - Distributor

Info

Publication number: US1984276A
Application number: US675387A
Authority: US
Inventors: Mallory Marion
Original assignee: Mallory Research Co
Current assignee: Mallory Research Co
Priority date: 1933-06-12
Filing date: 1933-06-12
Publication date: 1934-12-11
Anticipated expiration: 1951-12-11

Description

Mv MALLORY DISTRIBUTOR Filed June 12, 1953 2 Sheets-Sheet 2 ATTORNEY.

Patented Dec. 11, 1934 1,984,276

UNITED STATES PATENT OFFICE DISTRIBUTOR Marion Mallory, Detroit, Mich, assignor to Mallory Research Company, Toledo, Ohio, a corporation of Delaware Application June 12, 1933, Serial No. 675,387

2 Claims. (01. 200-21) The chief object of this invention is to reduce 17. The rotor 32 is rotated by the cam shaft 29 the interference with a radio set installed on a through the cam 30. A breaker mechanism 31 is car, created by the ordinary high tension disshown by means of which the primary circuit is tributor. made and broken. The roof 16 is supported by Normally, the distributor rotor has a radial a cylindrical portion 47 (which is connected to 5 clearance of 1/64", which, in actual practice, is the base 34 by the spring clamp 26), in which variable so thatsometimes it is nothing and again rotates the drive shaft 27 and disc 28, between it may be depending on the eccentricity of which and the shaft 29 is located a centrifugal the rotor. governor (not shown).

0 If the high tension terminals are made flush It will be noted that the high tension terminals 1 with the surface of the roof of the distributor, 18, 21 and 24 in Fig. 2 are located on the outside then the rotor rubbing against the terminals picks of the rail 17, and the high tension terminals 19, up particles of metal, which scratch the insula- 22 and 23 are located on the inside of the rail. tion of the roof between the terminals, and even- The burning away or arcing on the disc 33 is thus tually irregular arcs are formed as before, which balanced. 15 arcs set up disturbances which influence the aeri- In Figure 3, the

terminals

18, 19 etc. are located al on the car and interfere with radio reception. in a. groove formed between the rail 17 and the If the C a could be u h t and mainouter casing 47. The disc 33 is thus allowed to tained at a constant minimum distance, then the ride on the shelf in which the groove is formed.

20. irregular arcs would neyer be formed and the In Figures 5 and 6, the disc rides on a rail 1'7. disturbance originating in the distributor could but, in this case, the

terminals

18 and 19 are all be greatly lessened. located on the inside of the rail, and not alter- In the a s natively on both sides as in Figures 1 and 2.

Figure 1 is a cross-sectional elevation taken In Figures 7 and 8, the high tension terminals On the Plane o Figure 2. 18 and 19 are arranged in a groove formed be- 25 Figure 2 is a plan view looking up on the plane tween the double rail 17. 2-2 of Figure 1. In Figures 9, 10 and 11, the

electrodes

18, 19 Figures 3 and Corresponding w Figures 1 etc. are arranged in recesses in a shelf 17 formed and 2, show an alternative construction. on the side of the cover 47. These recesses are u e 5 and 6 ho anot alte iiti COII- connected by a shallow groove, which has a width 30 struction. equal to that of the high tension terminal 18, Figures 7 and 8 show another alternative conso that any pitting or building up that takes struction. place on the face of the disc 33, due to arcing, Figures 9, 10 and 11 show another alternative will not scratch that portion of 17 of the rail construction. upon which the disc 33 slides. 35

In the figures: When the outer terminals are arranged, as in 10 is the main high tension central lead which Figures 1 and 2, so that the rail constitutes a admits the high tension current for distribution barrier or partition between successive termiby the distributor. 11 and 12 are two of the high nals, this prevents a spark from starting at the tension leads, leading out of the distributor to the base of one of these terminals and traveling along spark plugs (not shown). 15 is a cap screw, holdthe surface of the bakelite to the next terminal. ing the cap 14 to the rubber pad 13 in which the That is, the path is made suiiiciently longer by leads are securely held. This rubber pad is the interposition of the partition to force the crushed against the roof 16 of the distributor, so spark to Jump at the top of the terminal. Jumpas to tightly grasp the

leads

10, 11 and 12. In the ing of the spark in this manner is also substanroof 16 o! the distributor is a rail 1'7 against which tially prevented by the formation of notches or rides a metal disc 33, carried by the rotor 32, in recesses in the rail 17 in the vicinity of the a well known manner. The high tension wires terminals, as shown more particularly in Figure 10, 11 and 12 terminate at the high tension ter- 10, thereby increasing the air gap between the

minals

18, 19 and 20. The central terminal 20 is rail and the end of the terminal, because a spark 50 in contact with the metal strip on top of the rotor will travel with appreciably less resistance along 32, and thus is electrically connected with the a surface than across an air gap, even though metal disc 33. The other two terminals 18 and the surface is formed by a good insulating 19 project from the roof so as to be almost, but material.

not quite flush with the upper surface of the rail Another disadvantage of not having a relief 55 around the terminal is that the rotor, if it is spring loaded, will tend to rebound and dig into the charred area on the trailing side of the terminal. If the edge of the rotor blade is sharp or square, some of the wearings from the metal will often become embedded in the charred portion of the track. If there is an air gap around the terminal, there can be no burning of the bakelite around the trailing side thereof, and the attendant troubles are avoided.

Any normal particles of wear, especially of the metal rotor blade, are wiped into the circular relief or into the groove instead of being embedded in the track. Several attempts have been made in the past to use a wiping typeof rotor with terminals set in a smooth bakelite surface, but it gave so much trouble in production that it had to be abandoned for the conventional jump type of high tension distributor. Metal particles would become embedded in the track and would in time cause the spark to jump across to an adjacent terminal.

This application is a continuation in part of my application Serial No. 671,667, filed May 18th, 1933. Distributors.

What I claim is:-

1. In a distributor, the combination with a rotor having a metal blade thereon, of a housing provided with a roof of insulating material, a central terminal constantly connected to said blade, and a plurality of successive outer terminals adjacent the path of the outer end of said blade, said roof being formed with a rail, over the surface of which the blade rides, said rail being arranged to constitute a partition of insulating material between successive outer terminals.

2. In a distributor, the combination with a rotor having a metal blade thereon, of a housing provided with a roof of insulating material, a central terminal constantly connected to said "blade, and a plurality of successive outer terminals adjacent the path of the outer end of said blade, the inside of said roof being formed with a raised surface, along which the outer end of said blade rides, said raised surface constituting a partition between successive outer terminals.

MARION MALLORY. V