US 1427392 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
KNUCKLE JOINT CONNECTION.
APPLICATION FILED AUG-10.1921- 1,427,892, v Patented Aug. 29, 1922 &1
INVENTOR ATTORNEY units amass manna caries.
WALTER JONES, OF NEW BRUNSWICK, NEW JERSEY, ASSIG-NOR, BY MESNE ASSIGN- MENTS, 'lO BRUNSWICK-KROESCHELL COMPANY, OF NEW BRUNSWICK, NEW (FER- SEY, .A CORPORATION OF NEW JERSEY.
Application filed August 10, 1921.
T 0 all ivhom it may concern:
Be it known that I, TALTER Joxns, a citizen of the United States, residing at New Brunswick, in the county of Middlesex, in the State of New Jersey, have invented certain new and useful Improvements in Knuckle-Joint Connections, set forth in the following specification.
.The invention relates to an improvement in knuckle joint connections for pistons and rods, and more particularly to an improvement in the knuckle joint connection between the piston and eccentric rod or strap disclosed in U. S. Patent No. 899,583, dated September 29, 1908.
he knuckle joint connection between the piston and the eccentric rod or strap shown in that patent comprises a cylindrical head formed on one end of the eccentric strap and received within a transverse bore in the piston. The construction and'arrangement of this knuckle joint connection enable the parts to continue in use for long periods without repair or replacement. When the parts have become worn by reason of long use, however, there is no provision for taking up the lost motion. The object of the present invention is to produce an improved knuckle joint connection between pistons and eccentric rods or straps having provision whereby compensation for wear may be made without dismantling the machine. To this end the invention consists in the improved knuckle joint connection hereinafter described and. particularly pointed out in the appended claims.
The preferred form of theinvention is illustrated in the accompanying drawings in which Fig.1 is a verticalsection through the improved knuckle joint connection; Fig.
2 is a side elevation of the parts shown in Fig. 1; and Fig. 3 is a. detail of a modified form of eccentrlc strap head.
The improved knuckle joint connection for pistons and eccentric rods or straps, as illustrated in the drawings, comprises in gen-' eral an eccentric strap 5 having at its upper end a. cylindrical head 6 received within a bore 7 formed transversely in the lower part of the cylinder 8. The head is provided withthe longitudinal grooves 9 for lubrication. These parts may be of any usual or preferred construction, and for purposes. of illustration and description are Specification of Letters latent.
Patented Aug. 29, 1922.
Serial No. 491,105. I
shown substantially as disclosed in said patent. As the piston reciprocates in the cylinder of the machine or pump, the head of the eccentric rod transverse bore in the piston. Inasmuch as the reciprocating motion is transmitted to the piston by the eccentric strap, it is necessary that there'be no lost motion between the head of the eccentric strap and the piston.
- The improved means of the present inven tion for taking up or compensating for lost motion between the eccentric strap and the piston comprises a pair of truncated cones 10 and 11 received in tapering holes bored longitudinally in the head 6 of the eccentric strap, as clearly shown in Fig. 1. The holes in the head of the eccentric strap taper toward the central portion 12 thereof. Each cone is of such length that when it is inserted in its corresponding tapered bore in the eccentric strap headit projects therefrom sufliciently to provide for considerable expansion o fthe eccentric strap head. In
'order that the head may be expanded to take up or-compensate for lost motion it is provided on its upper side with a longitudinal slot 13. The eccentric head is subject to greater wear on its top side than on its lateral sides. In order that the head when expanded to compensate for wear, may expand more at the top than at the sides, the lateral sides of the tapered holes are cut away or relieved at 18, as shown in the modified 'form' of eccentric head illustrated in F ig. 3. \Vhen the cones are drawn toward each other to expand the head, the expanding pressure is exerted" on the points.19 and thus the extra wear on the top is readily The eccentric sti'ap head is expanded by drawing the cones l0 and 11 toward each other. For this purpose a screw 14 is loosely received in the cone 11 and is threaded into or straposcillates in the the cone 10. To take up lost motion in the thr'eads a spring collar 15- is inserted between the head 16 of the screw and the bottom of the bore in which the screw head is received.
It will be observed that the construction of the means for taking up or compensating for lost motion between the piston and the eccentric strap is such that the eccentric strap head may be kept substantially in its true cylindrical form, thereby assuring smoothness and efliciency in operation. The screw l l-may be reached to draw the cones toward each other to expand the eccentric:
strap head to take up lost motion by passing a square-ended wrench through a hole cut in the side of the cylinder for that purpose. The head 16 of the screw is provided with a broached hole 17 to receive the squared end of the wrench.
It will be understood that the present invention provides a simple and efficient means fortaking up of compensating for lost motion between pistons and eccentric rods or straps. The adjustment means is so constructed that the necessary adjustment may be made without dismantling any of the parts of the machine or pump. Thus a great saving of time and labor is secured; and moreover, the machine or pump may be kept in nice adjusment at all times because of the facility with which the adjustment maybe made.
Having thus described the invention, what I claim as new is 1. A knuckle joint connection thereof; H for pistons and rods comprising a cylindrical head having a longitudinal slot received within a transverse bore in the piston, said head having tapered holestapering'toward the middle of the head, a conein each tapered hole, and a screw connecting the coneswhereby they maybe drawn toward each other to expand the head to take up lost motion between it and the transverse bore in the piston.
2. A knuckle joint connection for pistons and rods comprising a cylindrical head having a longitudinal slot received Within a t transverse bore in the piston, said head having tapered holes tapering toward the middle of the head, a cone in each tapered hole, a screw connecting the cones whereby they may be drawn toward each other to expand the head to take up lost motion between it and the transverse bore in the piston, said tapered holes being relieved at their lateral sides so that greater expanding pressure may be communicated to the top side of they cylindrical head than to the lateral sides WALTER JONES."