US364409A - Feedebick e - Google Patents

Description

I (NoModeL) P. R. HAMILTON.

MEANS FOR OVERGOMING DEAD CENTERS.

No. 364,409. Patented 11:

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l w f UNITED STATES PATENT OFFI E.

FREDERICK R. HAMILTON, OF BATH, NEW YORK.

MEANS FOR OVERCO MING DEAD-CENTERS.

. SPECIFICATION forming part of Letters Patent No. 364,409, dated June '1', 1887.

Application filed March 22, 1887.

To aZZ whom it may concern.-

Be it known that I, FREDERICK R. HAMIL- TON, of Bath, in the county of Steuben and State of New York, have invented certain new and useful Improvements in Means for Overcoming Dead-Oenters; and I do hereby 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 pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification. Y

My invention relates to an improvement in overcoming deadcenters; and it consists in, first, the combination of the fiy-wheel having a pin or bearing at its center and another one at one side thereof with a slotted plate which has the bearings or pins upon the wheel to pass through its slots, and to one end of which plate one end of the pitman is connected, and the spring which bears against the opposite end of the plate from the pitman for the purpose of returning theplate to position after having been moved; second, the combination of the fly wheel provided with two bearing pins or projections, a slotted plate through which the pins or projections pass, and which has one end of the pitman connected to one of its'ends, a spring which bears against the opposite end of the plate from the pitman, and a cam or eccentric for regulating the pressure of the spring, as will be more fully described hereinafter. V

The object of my invention is to apply to the fly-wheel a slotted plate which has an endwise movement in starting the wheel in case it is stopped upon either one of its dead-centers, and which plate in moving sweeps through a portion of a circle and thereby starts the wheel in motion, making it as easy to start the wheel when upon a dead center as when upon any other point.

Figure 1 represents a side elevation of allywheel to which my invention is applied, the parts being shown in one position in solid lines and in another position in dotted lines. Fig. 2 is a vertical section of the wheel taken at one side of the plate.

A represents a fly- 11ee1 of an y desired shape, size, or construction, and which is to be used Srllitl No. 231.931. (No model.)

in connection with any kind of a machine where a fly-wheel is needed. At the center of this wheel is formed a projection or bearing, B, which is snfiiciently long to'pass through the slot G in the slotted plate D, and upon one of the arms of the wheel, at any desired distance to one side of this center, is formed a second bearing, pin, or projection, F, which passes through the slot Gin one end of the plate. These two bearings, pins, or projec tions B F may be cast as apart of the wheel, secured thereto or applied in any suitable manner that may be preferred. They simply form means for attaching the slotted plate to the wheel, and hence no special importance is attached to either the manner of forming or attaching these bearings to the wheel. The slots through the plate extend in opposite direction to each other, and have suitable recesses formed at one end, so as to form rests for the pins or project-ions B F, and thus enable the plate to be held rigidly in position and the wheel to revolve at a very high rate ofspeed without any movement of the plate whatever.

' The bearing against the opposite end of the plate from which one end of the pitman is attached is a suitable spring, H, of any desired shape, form, or construction that maybe desired, and which keeps the plate pressed endwise as far as the slots will admit and the pins or projections in the rests which are formed for them in the ends of the slots. As here shown, afiat bent spring is used; but any other form of spring that will answer the purpose to keep this plate moved endwise may be employed.

As the tension of any spring will sooner or later become weakened, it becomes necessary to provide a tightening device for this spring, so that the pressure upon the plate can be regulated at will. In order to regulate the pressure of this spring, a cam or eccentric, l, is attached to the wheel, and by turning this cam or eccentric it can be made to exert a greater or less pressure upon this spring, as may be desired. \Vhenever the tension of the spring becomes weakened from any cause, or it is desired to exert a greater pressure upon the plate, it is only necessary to apply a screw driver to the cam or eccentric and turn it partially around, when a greater pressure may be brought to bear upon the spring. This cam or eccentric has its shank to pass entirely through one of the arms or a flange upon the wheel, and is held in position by means of a clamping-nut upon the opposite side. I do not limit myself in regard to this manner of holding the cam, for this may be Varied at will without departing from the spirit of my invention.

As long as the wheel does not stop upon either one of its centers, the slotted platehas no movement whatever. The distance from the pin or projection B to the pin J, to which the end of the pitman is connected, indicates the length of crank. Should the wheel stop upon either one of its dead-centers, either the pressure or the pull of the pitinan first moves the plate endwise, and, owing to the angles of the slots, forces it sidewise sufficiently far to carry the pitman off the deadeenter and to start the wheel in motion. As soon as the wheel begins to revolve, the spring forces the slotted plate endwise, so as to cause it to resume its normal position, and then the plate has no further movement until the wheel again stops upon one ofits dead-centers. This plate takes the place of the ordinary crank, and the whole power of the pitmau is transferred through this plate to the two bearings B F, whereby the wheel is made to revolve and the power is transmitted to the pitman.

The wheel is caused to revolve either to the right or the left, according to the manner in which the plate is applied to the two bearings B F. .Vhen applied in the position here shown, the wheel will revolve to the right. Should it be desired to cause the wheel to revolve to the left, the slotted plate and pin J are removed and then reversed, and the wristpin made to extend outward from the wheel, as shown. The directions in which the two slots extend being reversed, the motion of the wheel will also be reversed. By means of the construction here shown it is immaterial whether the wheel stops upon one of its deadcenters or not, for it can be started as readily and almost as easily as from any other position, and the same plate will cause the wheel to revolve in either direction that may be desired.

Having thus described my invention, I claim-- r 1. The combination of a fiywheel having one bearing extending in a line with the main shaft and a second bearing placed to one side thereof, a plate provided with slots which extend at an angle to each other and through which the bearings pass, the pitman which is connected to one end ofthe plate, and a spring which isapplied to the opposite end of the plate from the pitman for the purpose of returning it to position after having been moved, substantially as shown.

2. The combination of the vided with the bearing B at its center and the bearin F, located at one side thereof, the plate provided with two slots,which extend at right angles to each other and which have rests for the bearings in their ends, the wrist-pin for the pitman, the spring, and an eccentric for regulating the pressure of the spring upon the plate, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

FREDERICK R. HAMILTON. Witnesses:

F. A. LEHMANN, A. S. PATTISON.

wheel A, pro-

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