US522279A - Charles whitfield - Google Patents

Description

(No Model.) 7

2 0'. WHITFIELD. MEGHANISMFOR OPERATING PLUIVGJEPRS. No. 522,279. PatentedJuly 3, 1894.

ITED STATES PATENT MECHANISM FOR OPERATING PLUNGERS..

SPECIFICATION forming part of Letters Patent No. 522,279, dated July 3, 1894. I Application filedMaroh 14, 1893. Serial No. 465.945. (No model.) Patentedin England July 31, 1891,11'0. 12,964.

To all whom it may-concern:

Be it known that I, CHARLES WHITFIELD, a subject of the Queen of Great Britain and Ireland, and a resident of Kettering, in the county of Northampton, England, have invented certain new and useful Improvements in Mechanism for Operating Plungers, also applicable to Heel Building and Attaching Machines, (for which I have obtained Letters Patent in Great Britain, No. 12,964, bearing date July 31, 1891,) of which the following is a specification. I

This invention consists of a machine for punching leather and similar substances, characterized by an eccentric or crank mounted upon a revolving shaft in combination with a sliding plunger carrying the punches and connected together by a special form of link, which under the influence of a spring or its equivalent assumes a folded position and nullifies the thrust of the eccentric on "centric upon the plunger and so causes the plunger to descend and effect the punching operation. The operation of straightening out the link may be done at will, facility being afforded for this purpose.

This improved construction of machine with suitable modifications may be adapted to heel building and attaching machines.

On the accompanying drawings Figures 1 and 2 are front views of my improved punching machine (partly in section) showing the idle and active positions of the link. Fig. 3 is a sectional side elevation of a heel building machine with my improvements applied thereto. Fig. 4 is a sectional front view of the eccentric and link.

In accordance with my invention A is the horizontal shaft (seen dotted) driven by toothed gearing B andsupported in bearing 0 rising from the bed or base D.

E is the eccentric formed upon the end of the shaft A and surrounded by the sleeve F having a link or finger G connected by my improved link K to the plunger H as illustrated. This link is provided with a lever handle L or other equivalent device for bringing it in a line with the plunger H. The

plunger is fitted with punches as illustrated and works in the vertical slide or cylinder I, the front half of which is shown removed.

M is the spring situated in a recess formed in the plunger which pushes the point N against the link and causes the same to fold as illustrated in Fig. 1.

The action of my improved machine is as follows: Continuous revolving motion being imparted to the horizontal shaft, and the leather to be punched being placed beneath the plunger at O, the link K is pulled by handle L into line as illustrated in Fig. 2. The thrust of the eccentric is then imparted to the plunger, causing it to descend and so punch the leather. As soon as the punching operation is completed the handle L may be let go, the link K simultaneously folding outward and again assuming the position shown in Fig. 1, the shaft A continuing to revolve without having any efiect on the plunger.

ates in an upward direction for driving thev nails into the heel formed in the mold T and for attaching such heel to the'boot. The link is opened out by means of the handle U or an equivalent foot lever.

U is the block either employed for compressing the heel in course of building or for holding the boot against the heel during the process of attaching, being forced and held I in what manner the same is to be performed,

I declare that what I claim, and desire to secure by Letters Patent, is

1. In mechanism for operating plnngers, the combination with a plunger, of a shaft, an eccentric on the shaft, a sleeve on the cocentric, a link pivotally connected with the plunger and with the sleeve, and means adapted to act upon said link for throwing the same into and out of operative position with respect to the eccentric, substantially as described.

2. In mechanism for operating plungers, the combination with a plunger, of a shaft,

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