US1460500A - Plant for the supervision of the circulation lubrication on power cars - Google Patents

Description

July 3, 1923. 1,460,500

M. RALL PLANT FOR THE SUPERVISION OF THE CIRCULATION LUBRICATION ON POWER CARS Filed May 26, 1922 Patented July 3, 1923.

warren stares v arrests rarest oasis.

MAX RALL, OF STUT'I'GART, GERMANY, ASSIGNOR TO ROBERT BOSCH AKTIENGESELL- SCHAFT, OF STUTTGART, GERMANY.

ELANT FOR THE SUPERVISION OF THE CIRCULATION LUBRICATION ON POWER CARS.

Application filed ma 26, 1922. Serial No. 563,992.

T 0 all whom it my concern:

Be it known that 1, MAX BALL, a citizen of Germany, residing at Stuttgart, Germany, have invented certain new and useful Improvements in a Plant for the Supervision ofthe Circulation Lubrication on Power Cars, of which the following is a specification.-

For the supervision of the circulation of the lubrication oilon power vehicles, mechanical indicators have already been devised which are inserted into the pressure or delivery pipe for the lubricatin oil and indicate by the position of a movable member whether or not the pressure in that pipe is that required. The indicating member is, however, but diificultly to be discerned from some distance, and superintending the lubrication at night by that means is extremely unreliable.

These draw backs are obviated by means of the present invention, the gist of which consists in making a member, acted on by the oil-pressure, control a contact inserted into the circuit of an electric indicating means, such as a lamp or the like, in such a manner, that the lamp etc. is switched in only when, or after, a certain oil pressure is, or has been reached. If the respective power vehicle is equipped with a lighting dynamo, the circuit of the lamp or other indicating means is preferably connected up directly to the terminals of that dynamo, but not branched ofi behind the usual automatic switch between the dynamo and the battery, the purpose of the first-mentioned arrangement being to prevent the supervision means for the circulating lubrication oil from being injuriously acted on in the case of the switch becoming defective. Besides, a

special switch for the control-circuit maybe dispensed with. My invention is illustrated by way of ex amp e -in the accompanying drawing, in

' whichFig. 1 is a diagrammatical representation of a plant embodying that invention. Fig. 2 is a modified detail, viz, of the membets 4 and 5 of Fig. 1.

Connected with the pressure or delivery pipe 1 of the oil circulation pump 2 is a box 3 which is closed at its top by a diaphragm 4, that bulges out more or less according to the ressure of the oil in the pipe 1. The diap ragm acts upon a. contact 5 inserted into a circuit 6 connected up directly to the terminals of the lighting dynamo 7 and having inserted into it the indicating lamp 8. This circuit is perfectly independent of the automatic switch 9 and the other lamp circuit 10 so that the lubrication may be constantly and automatically superintended. In Fig. 1 the contact 5 is broken, as is consequentl also the circuit 6 of the lamp 8, thus indicating that the pressure of. the oil in the pipe 1 has the proper height. This being so, the diaphragm is so much bulged out that, as shown, the contact 5 is broken. But as soon as the pressure of the oil in the pipe 1 sinks to or below a certain predetermined degree, the diaphragm 4 is bulged out correspondingly less or, may be, not at all, so that the contact 5 is closed. At once the lamp 8 lights up, indicating a disturbance in the lubrication conduit.

Connecting up the circuit 6 directly to the terminals of the lighting dynamo offers the advantage that the plant is independent of the position of the automatic switch 9 sothat the driver is not compelled to change now and then the position of this switch in order to ascertain the condition of the plant. This examination proceeds quite automaticallyhwhen the motor is started and stopped.

en starting the motor, the lamp 8 does not immediately light up because a current of suflicient strengthis not "instantly generated, but after a very short time sufficient current is generated and the lamp lights up, on the onehand because there is sufiicient current in the circuit 6, and on the other hand, because there is not yet sufiicient pressure in the oil pipe 1. But again after a short time the engine has produced the requisite pressure in the pipe 1, the diaphragm 4 bulges out, the contact 5 is broken,

that the plant is in proper working. condition.

While, in the form of construction of the contact shown in Fig. 1 at 5 the circuit is opened when the proper pressure has been reached in the pipe 1, it is closed in the modified form. of construction shown in Fig. 2. This is at once obvious without a detailed explanation. The lamp is thus burning as long as that pressure is maintained.

It is also obvious that the lamp 8 may be replaced by any other suitbale indicating means, for instance a rotary disk, a hand and the like. Making use of a lamp offers the advantage that the lubricating installation may be superintended also in the evening and at night-time and with the same reliability as at day-light.

The circumstance that the indicating installation operates only when the lighting dynamo operates is of no consequence because also the circulation-lubrication operates only when the car motor is running.

Having now described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a device of the class described, the combination, with an engine, an oil circulating system for said engine, and means driven by the engine for forcing oil under pressure through said system, of a member adapted to be controlled by the pressure of the oil in said system, electric indicating means, a dynamo operated by said engine, an electric circuit connected directly to the terminals of said dynamo, said indicatin means being connected in said circuit, and a circuit breaker connected in said circuit and controlled by such oil-pressure-controlled member.

2. In a device of the class described, the combination, with an engine, an oil circulating system for said engine, and means driven by the engine for forcing oil under pressure through said system, of an electric lamp, a dynamo operated by said engine, an electric circuit connected directly to the terminals of said dynamo, said lamp bein connected in said circuit, and means in said oil circulating system including a diaphragm for maintaining the electric circuit MAX BALL. [1 s.]

Witnesses O'rro WAGNER, [1,. s.] BERTOLD A. BRAUN. [1,. 5.]

Images