Untitled record

Application filed November 10, 1885. Serial No. 182,307. (No model.)

To all whom it may concern:

Be it known_that I, James R. Goddard, a citizen of the United States, residing at New Bedford, in the county of Bristol and State of 5 Massachusetts, have invented certain new and useful Improvements in Devices-for Operating Steam-Engine Indicators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable io others skilled in the art to ivhich it appertains to make and use the same, reference being had to the accompanying drawing, and to letters or figures of reference marked thereon,which forms a part of this specification.

.15 This invention relates to devices for operating steam-engine indicators; and it consists in an improved device, as hereinafter described and claimed, whereby a pantograph attachment for a steam-engine indicator can be 20 easily and quickly made.

Prior to my invention motion has been communicated to the indicator by means of a cord attached to a pantograph. One end of this pantograph was attached to the cross-head or 25 other similarly-moving part of the engine, and the other end was secured to a fixed post, · so that the motion of the indicator-cord corresponded to the motion of the engine-piston, but moved through a much shorter space.

It has been found very inconvenient to have to make a special pantograph-post for each size and make of engine indicated, and an attempt has been made to overcome the difficulty by making an adjustable connection be35 tween the pantograph and the engine crosshead. This form of construction only partially overcomes the difficulty, as the range of adjustment is very limited, and in a vertical direction only, and it still necessitates 40 the attachment of the other end of the pantograph to a fixed support, as before.

According to my present invention I make the pantograph - post itself adjustable both vertically and horizontally in any direction, 45 and make it as light and handy as possible, so that it may be carried about with the pantograph attached to it, ready to be applied to any engine.

The accompanying drawing, shows in per50 speetive the pantograph, its stand,and portions of the engine to which the pantograph is attached.

A isthe pantograph, of ordinary construction, attached to the cross-head B of the steamengine, and with the pin a' at the other end 55 of it pivoting it to the top of the pantographstand.

C is the indicator-cord attached to the bar across the lower part of the pantograph, and communicating its motion to the indicator, 60 which is not shown in the drawing.

The pantograph-post consists of a central hollow tube, D, provided with a flange, cZ, at the bottom forming a base-plate, which is provided with holes, so that it can be screwed or 65 nailed to the floor, and with a collar, d', and thumb-screw d‘ at its upper end. A rod, d³, slides wit hin the tube D, and its vertical height can be adjusted by the said thumb-screw at any desired height. The lower end of the 70 pantograph is pivoted to the upper end of the rod T.

E is a collar, which is fitted into a circular groove on the rod d³, and is provided with the radial Ings e. 75

F are tubular rods, each of which is provided with a collar,/, and thumb-screw/' at its upper end, and with an eye,/’, and pin/⁶at its lower end.

G are feet-plates hinged to the lower ends 80 of the tubular rods F by means of double eyes g, and provided with screw or nail holes for attachmentto the floor. A rod,/⁴, slides within each of the tubes F, and its position can be fixed by means of its thumb-screw. Each rod 85 /‘ is hinged at the top to one of the radial lugs e. I prefer to use three of the tubes F; but that number may be increased or diminished, if required. If the base-flange of the central post should not come flat upon the floor, 90 by reason of any horizontal adjustment of the lower end of the pantograph, a wedge can be placed under it before it is fastened down.