US1745855A - Mechanical movement - Google Patents

Description

' c; LITT LEFIELD MECHANICAL MOVEMENT Feb. 4, 1930.

Filed Oct. 9. 1926 N l" E 1\" TON Car/ Li/f/e fie/d 4 L.

Patented Feb. 4, 1930' CARL LITTLEFIELD, OF BATTLE CREEK, MICHIGAN, ASSIGNOR TO BATTLE CREEK BREAD WRAPPING MACHINE COMPANY, OF BATTLE CREEK, MICHIGAN MECHANICAL MOVEMENT Application 'filed October 9, 1926. Serial No. 140,575.

the claims.

A structure which is a preferred embodiment of my invention is illustrated'in the accompanying drawing, forming a part of thisapplication, in. which:

i Fig. lis a side elevation of a mechanism embodying the features of my invention, the

''parts being shown mainly in conventional F i". 2 is a similar vlew with the partsin I another position.

' In the drawing similar reference characters refer to similar parts throughout the several views. 7

In the'accompanying drawingl have'illustrated my improvements as I have embodied the same in a wrapping machine, the part 1 v 7 representing a transfer plunger by means of which the articles are shifted from a feedv conveyor to a wrapping mechanism. These parts, however, are not shown as they'form no-part of my present invention.

2 represents a gear Wheel connected to a' suitable source of power and coacting-with r the gear?) having a driving crank 4 thereon.

5 is a rockshaft having an arm 6 thereon connected to the driven member 1 by means of the link 7. Therockshaft 5 hasa second arm 8which is connected to the driving crank by a connecting rodconsisting of the links 9 and 10, the links being pivotally connected at 11, the link 9 being connected to the crank by I the wrist pin 12 while the link 10 is connected 9 to the arm 8 by the pivot 13. v

The link 9 is supported at its outer end by the rocker arm l'which is pivoted at 15 and connected'to the'link by the pivot 16. I i In the embodiment illustrated the links and pivots and the rocker 14 are so proportioned and arranged that during a portion of O the strokethe pivot ll swings in an'arc of which the pivot 13 is the axis, the result hein that there is a dwell in the movement of the actuated rockshaft and consequently to the driven member operatively connected thereto. By this means the stroke may be properly timed relative to other moving parts.

My improved mechanical movement is adaptedfor many uses where a movement of this character is desired. The parts are simple and economical in structure and assembling and capable of a very wide adaptation.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is: i

1. In a mechanical movement, the combination of a driving crank, a rockshaft provided with an arm, a pivotally mounted rocker arm having its swinging end disposed in the general direction of the rockshaft, a link connecting the swinging end of said rocker arm to said crank, and a second link pivotally connected to said arm on said rockshaft and to said first mentioned link at a point centrally between its connections to said driving crank and rocker arm and so that the pivot connecting said links moves during a part of. each cycle of the crankin the arc of a circle of which the pivot connecting the second link to the rockshaft arm constitutes a center.

2.. In a mechanical movement, the combination of a driving crank, a rockshaft provided with an arm, a pivotally mounted rocker arm disposed with its swinging end in the general direction of the rockshaft, and driving I connections for said driving crank to said rockshaft comprising a link connected to said driving crank and to the swinging end of said rocker arm and a second link connected to said arm on said rockshaft and to said first mentioned link at a point centrally between itspivotal connections to the driving crank and rocker arm.

3. In a mechanical movement, the combination of a driving crank, an oscillatingly supported actuated member, a pivotally mounted rocker arm disposed with its swinging end in the general direction of the said actuated member, and driving connections for said crank to said actuated member comprising av link pivotally connected to said crank and to said rocker arm and a second link pivotally connected to said actuated member and to the first mentioned link at a point intermediate the pivotal connections for said driving crank and rocker member andso that during a portion of its travel it moves in the arc of a circle centering in the pivot connecting the second link to the actuated member.

In Witness whereof I have hereunto set my hand.

CARL LIT'TLEFIELD.

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