US2010289A

US2010289A - Engine

Info

Publication number: US2010289A
Application number: US699556A
Authority: US
Inventors: Sanford I Beach
Original assignee: LINCOLN BEACH
Current assignee: LINCOLN BEACH
Priority date: 1933-09-22
Filing date: 1933-09-22
Publication date: 1935-08-06
Anticipated expiration: 1952-08-06

Description

Aug. 6, 1935.

Filed sept. 22; 1935 S. l. BEACH ENGINE 2 Sheets-Sheet l JW/020 Z 5016/4. www

br-roms llrg. 6, 1935. I s, l, BEACEH 2,010,289` ENGINE Filed sept. 22, 1935 2 Sheets-sheet 2 mvmfon ATTORNEYS Patented Aug. 6, 1935 ENGTLNE Sanford I. Beach,

half to Lincoln Application September Z2, 1933,

(Cl. 12S-50) 9 Claims.

This invention relates to engines of the opposed pistongtype adaptable for operation by steam or asv an linternal combustion engine and also involves certain features which Vmay be advantageously incorporated in many types o reciprocating compressors. p

The primary object of the invention is to provide an improved connecting rod assembly in an engine of this type wherein the power thrust of each piston may be transmitted radially to a single crank pin thereby avoiding the danger of binding at the crank pins such as is liable to occur in the case of dual connecting rods after uneven wear.

.ln carrying my invention into effect I employ a hollow piston having a second piston reciprocable therein.` take advantage of the fact that the connecting rod of 'the hollow piston operates in tension and hence permits of a wrist pin assembly such that the thrust may be transmitted through a` double pin, one angularly disposed to the other. It thereby becomes a specio object of the invention to teach the construction of this assembly and to provide means by which the assembly may be mounted internally oi its piston in such manner that there is no tendency to distort the piston in operation.

Another object of the invention is to provide ak valving arrangement in which the inlet and exhaust is controlled by puppet valves, the ports through the hollow piston serving, preferably, only as a passage through which ingress and egress of the gases takes place. I thereby avoid the serious difficulties sometimes encountered because ot burnt port holes.

A further object is to provide an improved spark `plug placement by which the plug is uncovered for ring and thereafter the plug is isolated from the ring chamber. In this manner I am enabled to retain the better recognized type ignition device without requiring iloating wires and other unworkmanlike arrangements such as have been suggested for engines of this type.

Other objects and advantages either directly,1 described or indirectly implied from the favorable arrangement of parts will become hereinafter more fully apparent as reference is had to the accompanying drawings wherein my invention is illustrated by way of example and in which Figure l is a vertical section through an engine taken axially of a cylinder and transversely of the crankshaft to illustrate my invention;

Fig. 2 is a section similar to that shown in Fig. 1 taken longitudinally of the crankshaft;

Bualo, N. Y., assigner of one- Beacll, Miami Beach, Fla.

Serial No. 690,556

Fig. 3 is a horizontal section taken along the line 3-3 ci Fig. 1;

Figs. 4 and 5 are details of my improved piston sleeve Figs. 6 and 7 are enlarged details of the wrist 5 pin assembly of the larger piston shown in Figs. 1

and 2.

More particularly,

I indicates a cylinder which may be one of a plurality cast in a block. A hollow piston 2 within the cylinder I is reciprocable therein and a second piston 3 placed within the hollow cylinder 2.

is reciprocably Each of these pistons is connected to a crank shaft 4 in a manner to be hereinafter more fully described.

The cylinder l has a walled channel 5 formed therein and puppet valves S and 'I control the ingress and egress of fuel and exhaust gases to and from said channel. actuated by cams 3 on a cranksha the crankshaft 4 in The hollow piston 2 has a plur These valves 6 and I are it 9 driven from the conventional manner.

ality of stepped ports i@ therethrough for establishing communication between its interior and the channel 5.

For proper inletting and exhausting these ports i9 must be in communication with the channel 5 during substantially the entire working strokes of the pistons. communication be cut off before Thus during the inlet stroke if the inletting is complete there will be a rarification of the fuel charge and a loss of volumetric eiciency. Also if at the other end of a stroke the ports are not in communication with the chann el scavenging of the exhaust gases cannot be completed. It will thus be seen that the ports I0 slide valves.

Another port II is provided in do not act as the hollow cylinder 2 which is adapted to uncover the spark plug l2 extending through the side cylinder I wall of the at a predetermined period,that is,

when compression is completed. By this arrangement the conventional nections I3 may be used.

The piston 3 is provided with and a connecting rod S5 for conne throw I@ ci the crank shaft 4. the connecting rod pin is so constructed type plug and wiring cona wrist pin I4 ction to a crank The small end of I5 which attaches to the wrist that the axis of the rod is oiset laterally from the axis of its piston as best seen in Fig. 2.

The inner end portion of the piston 2 is provided with tongues and grooves Il to receive simi- This sleeve, as best seen in Figures 4 and 5 is made of three parts, two of which are almost semi-cylindrical and the third on e 24 of which is so formed as to act as a wedge to expand and maintain the other two parts in assembly against the tongues and grooves I1. This sleeve l constitutes a means for supporting the wrist pin of the piston in such manner as to distribute the loading thereof over the entire base of the piston 2. A pin Eil spans the sleeve i9 and carries a wrist pin supporting member 2i in which resides a wrist pin 22 upon which is journaled a connecting rod 23 for connection to a second crank throw 24. The pin 23 is offset from a diameter of the sleeve, as seen in Figure 2 and the wrist pin is on the opposite side of the axis of the cylinder l from the connecting rod i5. By this arrangement a single connecting rod is suflicient for each

piston

2 and 3. The rod 23 is a tension member and the rod i5 is a compression member during the firing stroke.

Various modications may be made without departing from the spirit of my invention and I therefore desire that my protection will be interpreted within the full scope of the appended claims.

What I claim is:--

l. In an engine, a cylinder having a hollow piston therein, a second piston reciprocable in said hollow piston, said pistons each having a wrist pin, the two wrist pins in each cylinder being normal to each other, a crankshaft having two crank pins for each of said cylinders, a single connecting rod extending from one of said wrist pins to one of said crank pins, and a single connecting rod extending from the other of said wrist pins to the other of said crank pins.

2. In an engine, a cylinder having a hollow piston therein, a second piston reciprocable in said hollow piston, a crankshaft having two crank throws for each of said cylinders, a connecting rod extending from said hollow piston to one of said crank throws and a connecting rod extending from the other of said pistons to the other of said crank throws, each of the connecting rods being offset from the axis of its piston, said connecting rods being connected to wrist pins residing at right angles to each other.

3. In an engine, a cylinder having a hollow piston therein, a second piston reciprocable in said hollow piston, each of said pistons having a wrist pin therein, said wrist pins each residing within pins, and connecting rods extending from said wrist pins to said crank pins.

In combination, a hollow piston having a wrist pin and a second piston reciprocable therein, a wrist pin for said second piston, a supporting member journaled on said wrist pin spanning said hollow piston for supporting a second wrist pin, a wrist pin journaled on said supporting member, a crank shaft having crank pins, and connecting rods extending from said second wrist pin and from the wrist pin in said hollow piston to said crank pins.

5. In combination, a hollow piston and a second piston reciprocable therein, a wrist pin for said second piston, a wrist pin supporting structure comprising a pin spanning said second piston internally of 'the circumference thereof at right angles to the nrst mentioned wrist pin and a member depending from said pin, a wrist pin supported by said depending member substantially parallel to said rst named wrist pin and residing Within the confines of said second piston, a crankshaft having crank pins, and connecting rods connecting the wrist pins with said crank pins.

6. In combination, a hollow piston having tongues and grooves in the inner end portion thereof, a second piston reciprocable in said hollow piston and having a wrist pin supported therein, a wrist pin supporting structure comprising a tongue and groove sleeve tting the grooves and tongues of said hollow piston for support thereby, a pin spanning said sleeve and supported thereby, a wrist pin supporting member depending from said pin, a wrist pin carried by said supporting member, a crankshaft having crank pins, and a connecting rod connecting said wrist pin with said crank pins.

7. In combination, a hollow piston having tongues and grooves in the inner end portion thereof, a second piston reciprocable in said hollow piston and having a wrist pin supported therein, a wrist pin supporting structure comprising a split sleeve fitting the grooves and tongues of said hollow piston for support thereby, said split sleeve comprising three segmental portions one of which is of wedge shape to constitute a retaining means foril the assembled sleeve, a pin spanning said sleeve and supported thereby, a wrist pin supporting member depending from said pin, a wrist pin journaled in said supporting member, a crankshaft having crank pins, and connecting rods connecting said wrist pins and said crank pins.

8. In combination, a cylinder, a hollow piston reciprocable in said cylinder, a second piston reciprocable within said hollow piston, a walled channel .formed in said cylinder adjacent said hollow piston approximately midway of the height of the working portion thereof, said hollow piston having a row of ports therethrough for connecting the interior of said cylinder with stantial portion of the stroke of said piston, two puppet valves in said channel, one of said puppet valves being an inlet valve and the other an outlet valve, and timed means for alternately opening said puppet valves. l

9. In an engine, a cylinder having a spark plug projecting thereinto along the length thereof, a hollow piston reciprocable in said cylinder, and a second piston within said hollow piston, a walled channel in said cylinder exposed to the outlet valve controlling the ingress and egress of fuel charges and exhaust gases respectively thereto, cams for operating said inlet and outlet valves, said hollow piston having a plurality of stepped ports therethrough, the top one of said ports being adapted to uncover said spark plug to the space between the top of said hollow piston and said second piston at a predetermined point in the engine cycle, the remainder of said ports establishing communica-tion between said space and said channel whereby said inlet and outlet valves may control fuel charging and scavenging.

SANFORD I. BEACH.