US473810A - Wrist-plate - Google Patents

Description

(No Model.) v

. J. BARCLAY.

WRIST PLATE.

Patented Apr. 26, 1.892.

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Arm/mm.

UNITE STATES 1 ATENT FFICE.

JAMES BARCLAY, OF SIOUX CITY, IOWA.

WRIST-PLATE.

SPECIFICATION forming part of Letters Patent No. 473,810, dated April 26, 1892. Application filed October 22, 1891. Serial No. 409,465. (No model.)

To all whom it may concern.-

Be it known that 1, JAMES BARCLAY, a citizen of Canada, residing at Sioux City, in the county of Woodb'ury and State of Iowa, have invented certain new and useful Improvements in lVrist-Plates; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to wrist-plates for en gines, being especially adapted to those of the Corliss type.

The object of the invention is to provide a i new and improved wrist-plate which is simple and durable in construction and arranged to permit the engineer to easily start the engine without being compelled to lift the hookrod and hold it up while manipulating the throttle-valve and starting-bar.

The invention therefore consists in. the novel construction and arrangement of the parts and the combination thereof, as will be hereinafter fully set forth, and specially pointed out in the claims.

The invention consists of two plates mounted to turn independently one of the other and arranged one for the valve-rods and the other for the hook or eccentric rod.

The invention further consists of a device for locking the two plates together.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 isa side elevation of the improvement. Fig. 2 isa face view of the same. Fig. 3 is a sectional plan view of the same on the line 00 as of Fig. 2. Fig. 4 is aside elevation of the cap portion of the locking device.

Referring now to the illustrations, the improved Wrist-plate is provided with two plates or disks A and B, of which the disk A is provided with a central hub O, mounted to turn on a suitable stud, said stud being suitably fastened to the side of the cylinder in the usual manner. On the hub O is mounted to turn the hub D, formed centrally on thesecond disk or plate B, so that the latter is concentric to the plate and both can turn independently one of the other. On the front disk A and on the upper end of the same is formed a projection A, carrying the wrist-pin E, adapted to be engaged by the hook of the eccentric-rod, so that a turning motion is imparted to the said disk A from the eccentric. On the back of the other disk B are secured the rearwardly-extending wrist-pins F, connected in the usual manner with the Valve-rods G for operating the valves of the engine.

In order to connect the two disks A and B with each other, a locking device H is provided,having a casing I, screwing in the disk A and in which is mounted to slide a pin J, formed at its inner end with a conical offset J, adapted to engage a correspondinglyshaped bushing K,held in the face of the disk B. The pin J is secured on the rod L, extending through and having its bearing in a cap N, screwing in the casing I. Said cap N is threaded on its upper portion, so as to screw into the threaded portion of said casing I for the following reason: WVhen the cap N is unscrewed by means of handle 0, the threaded upper portion of said cap unscrews and draws out or releases the conical offset J from the seat K, the operator then withdrawing the handleO from the slot, and by giving it a quarter-turn the disks A and B are allowed to turn independently of each other.

On the outer end of the rod L is secured a handle 0, and on the rod L, within the casing I and the cap N, is coiled a spring P, pressing with one end against the pin J and with its other end at the outer end of the cap N. The pin P has the tendency to force the conical end J to the seat in the bushing K to lock the two plates A and 13 together.

The operation of my invention is as follows: To unlock or disconnect the two disksA and B, the operator unscrews the cap N, which acts as a jack-screw to draw out or release the conical-shaped offset J from the bushing K. The operator then withdraws the handle 0 from the slot N in which it falls, and then by giving ita quarter-turn he can conveniently seat the same in the transverse notch N so that the pin J is held in an outward position or is withdrawn sufficiently into the cap portion so that the two plates or disks are unlocked or disconnected, so that they canturn independently of each other. Thus when the engineer desires to start the engine he simply disconnects the two disks A and B by withdrawing the pin J from the bushingK in the disk B. The latter can then be turned so as to bring the valves in the proper position without the engineer touching the hook-rod connected with the stud E. As soon as the engine is started and the eccentrics commence to turn, the disk A is rotated and the operator by releasing the handle 0 from the notch N and putting it in position for entrance to the slot N permits the pin J to drop into its seat in the bushing K whenever the pin comesopposite the said bushing K on the revolving of the disk. Then by means of handle 0 the cap N is screwed into the casing I, causing the conical-shaped offset J 'to be pressed into seat K. The two disks A and B are then locked together and the wrist-plate operates inthe usual manner. Thus it will be seen that the engineer does not disconnect the eccentric-.rodor hook-rod from the wrist-pin E centric rod, and a locking device, substan tially as described, for connecting the two disks with each other,vas set forth.

2. The combination, with two disks or wrist plates, of which one is connected with the valve-rods and the other with the hook or eccentric rod, of a locking mechanism for connecting the two disks with each other and comprising a spring-pressed pin, a casing carrying the-said pin and secured on one of the wrist-plates, and a seat held in the other wristplate and adapted to be engaged by the said spring-p ressed pin, substantially as described.

3. A wrist-plate comprising two plates or disks mounted to turn independently oneof the other, one of said disks being connected with the valve-rods and the other with the hook or eccentric rod, and a locking mechan- I ism consisting of a spring-pressed pin adapted adapted to engage notches provided in said cap to rotate it in either directionand to hold the pin in or out of contact with the said bushing or seat, all constructed, arranged, and adapted to operate substantially as and for the purpose specified.

4. The combination,.with two disks or wrist plates, of which one is connected with the valve-rods and the otherwit-h the hookor eccentric rod, of a locking mechanism for connecting'the two disks witheachother andcomprising a spring-pressed pin, a casing, .and cap carrying the said pinand securedon one of the wrist-plates, a seat held in the other wrist-plate and adapted to be engaged by the said spring-pressed pin, and a handle connected with the said spring-pressed pin and adapted to engage notches in the-said cap to hold the pin in or out of contact-with the said bushing or seat, allconstructed, arranged, and intended to operate substantiallyas set forth.

5. Ina wrist-plate, the combinationof the disks A and B, one of which is connected with the valve-rods and the other withthe hook or eccentric rod, the pin J, thecasing-I, the cap ,N, provided with the notches N' and N the conical offset J, the bushing K, held in the face of disk B, the handle 0, and the rod .L, and the notch N formed in theface of cap N, all as set forth.

In testimony whereof I affix mysignature in presence of two witnesses.

JAMES (BARCLAY. Witnesses:

W. H. HOYT, ALBERT WORTH.

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