US1595917A

US1595917A - Engine

Info

Publication number: US1595917A
Application number: US48409A
Authority: US
Inventors: Elmer A Owen
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-08-05
Filing date: 1925-08-05
Publication date: 1926-08-10
Anticipated expiration: 1943-08-10

Description

Aug. 10 1926., 1,595,9I7

E. A. OWEN ENGINE Filed August 5, 1925 2 Sheets-Sheet l ATTORNEY WITNESS:

Aug W T1926 H,595,9l7

E. A. OWEN ENGINE Filed August 5. 1925 2 Sheets-Sheet 2 ZZwezui fizz/era ATTORN EY Patented Aug. li

llhllliill) ELMER A. O'WEN, OF MILWAUKEE, WISCONSIN.

. I i ENGINE.

Application filed. August 5, 1925. Serial No. 48,409.

lhis invention relates to engines either of the internal coiniuistion or tiuid pressure operav d type and has for its obj t the provision of a novel crank motion whereby to increase the power and pulling torque without changing the piston displacement, that is, without increasing the bore or lengthening the stroke of the piston.

An important object the provision of an engine or similar device equipped internally with means whereby the point of con- TIQCtlOn of the connecting rod with respect to the center of the crank shalt is it omatically varied whereby the levera e will be greatly increased. and degree of power developed than is )(Zl'Sil'jlG in the ordinary type, whereby a short stroke ".10- tor or engine may be caused to develop fully as much power as a long stroke one without the disadvantages of increasing the piston speed, or materially increasing vibration or friction.

Another object of the invention is to pro vide an engine of this character in which the cylincer is otlsct with respect to the crank shaft whereby the explosion or power stroke will not occur on dead center.

A further object is to provide an engine, pump or the like, of this character embody ing cam means for eil'ecting shifting of the point of connection of the connecting rod with respect to the axis of the cranr sha t, this cam means being, moreover, adjustable from the exterior of the motor so that the con'ipression ratio may be increased for high speed by increasing the angle of setting of the cam or eccentric, when used for an internal combustion engine.

An additional object is the provision of an engine of this character which will be simple and inexpensive in mamitacture. easy to control and operate, economical in fuel consumption, powerful in action, cilicient and durable in service and a general improvement in the art.

Nith the above and other objects and advantages in View, the invention consists in the details of construction, and the arrangement and combination of parts to be hereinafter more fully described and claimed, and illustrated in the accompany 'ing drawings, in which Figure 1 is vertical section through the engine showing the connecting rod and piston in one position.

Figure 2 is a similar view illustrating a \li iierent position.

Figure 3 is a detail section taken at right angles to Figures 1 and 2 showing the mounting of the cam means for effecting the automatic shitting.

Figure l is a detail view of the means tor adjusting the cam.

Figure 5 is an elevation taken at right ang es to Figure 4.

higure 6 is a detail perspective View of the member moved by the cam, and

Figure 7 is a fragmentary detail elevation showing a modification.

Referring more particularly to the drawings, l have shown the engine as comprising any suitable or ordinary crank case 10 upon which is mounted the cylinder 11. \Vhilc only one cylinder is mentioned it mould of course be understood that there is no limitation in this respect as there may be as many orv as few as desired within the scope of the invention. Journaled long-itudinally within the crank case is the engine shaft 12 which is unprovided with c KS of ordinary construction but which carries a fly wheel 13 formed with a radially extending slot 14 and provided at the side opposite the slot with an enlargement 15 for counter-balancing purposes. Attention is directed to the fact that the cylinder 11 is oii'sct with respect to the longitudinal axis 01" the shaft 12 in order to avoid having the explosion or working stroke occur while the piston is on dead center.

Operating within the cylinder 11 in the usual manner is a piston 16 carrying a connecting rod 17 which is pivotally connected upon a wrist pin 18 carried by a block member 19 shdable along the slot 14. The

block 19 is formed upon or otherwise pro vided with an eccentric strap 20 for a purpose to be described.

Mounted within the crank case is a cam or eccentric 21 located within the confines of the eccentric strap 20. It is desirable that this cam be adjustable from the outside of the motor and for this reason I have shown it as having a hub portion 22 provided with teeth 23 and rotatably mounted within a suitable recess 2a in the end plate of the engine. The operating means for shifting the position of the cam preferably consists of a worm 25 carried by a shaft 26 which is suitably journaled and which may be equipped with a handle 27 or which may be simply so formed as to be capable of engagement by a wrench or the like whereby turning movement may be imparted to it for the purpose of rotatably adjusting the cam 21 into the desired position.

In the operation, it will be seen that when the piston 16 reciprocates in well known manner under the influence of either fluid pressure or on account of the explosion of a combustible mixture, the fly wheel 13 will of course be rotated. However. owing to the provision of the cam 21 it is quite clear that the eccentric strap 20 surrounding it and carrying or carried by the block 19 on which the wrist pin 18 is mounted will be moved in such a manner that the block 19 will travel radially along the slot 1 its distance from the shaft 12 varying constantly so as to increase the leverage at the power stroke and thereby develop more power than is ordinarily the case in a short stroke motor. In this way it is quite clear that all the advantages of a long stroke motor will be obtained without the necessity of increasing the piston displacement that is lengthening the stroke or otherwise changing the dimensions of the engine. It is also evident that there will be less vibration inasmuch as there is no necessity for excessive speed to obtain the desired power.

In Figure 7, I have shown a slight modification in which the cam 28, corresponding to the cam 21 is not adjustable but secured by means of screws 29.

From the foregoing description and a study of the drawings, it will be apparent that I have thus provided a simply constructed, inexpensive and very highly efficient engine depending for its advantageous features upon the peculiar connection of the connecting rod with the shaft, the connection being such that there will be an automatic change in the distance for increasing the leverage of the power stroke. It is believed that the construction, operation and advantages will be readily apparent to one skilled in the art without further explanation.

IVhile I have shown and described a preferred embodiment of the invention, it should be understood that I reserve the right to make such changes in the form, construction and arrangement of parts as Will not depart from the spirit of the invention or the scope of the subjoined claims.

Having thus described the invention, I claim:

1. In an engine including a piston, a connecting rod connected therewith and further including a shaft, a fly wheel on the shaft formed with a radial slot, a carriage slidable along the slot and equipped with a wrist pin connected with the connecting rod, and cam means within the crank case for moving the carriage, said means comprising a cam mounted within the crank case and arranged in a relatively stationary position, and an eccentric strap carried by the carriage and encircling the cam.

2. In an engine including a piston, a connecting rod connected therewith and furtherincluding a shaft, a fly wheel on the shaft formed with a radial slot, a carriage slidable along the slot and equipped with a wrist pin connected with the connecting rod, and cam means within the crank case for moving the carriage, said means comprising a cam mounted within the crank case and arranged in a relatively stationary position, and an eccentric strap carried by the carriage and encircling the cam, and means for shifting the position of the cam.

3. In an engine including a piston, a connecting rod connected therewith and further including a shaft, a fly wheel on the shaft formed with a radial slot, a carriage slidable along the slot and equipped with a wrist pin connected with the connecting rod, and cam means within the crank case for moving the carriage, said means comprising a cam mounted within the crank case and arranged in a relatively stationary position, and an eccentric strap carried by the carriage and encircling the cam, and means for shifting the position of the cam, including a toothed hub on the cam, and gear means operable from the exterior of the engine and engaging said toothed hub for effecting partial rotation thereof.

In testimony whereof I afi'ix my signature.

ELMER A. OWEN