US2133526A - Two hand safety lever - Google Patents

Description

Oct. 18, 1938. F'BARNEY 2,133,526

TWO HAND SAF'ETY LEVER Fil ed Dec. 28, 1956 .v I v 4 3 I 21 3 l8 Patented Oct. 18, 1938 TWO SAFETY LEVER Freeman Barney, Grand Haven, Mich.,. assignor to Elie ChallengeMachinery Company, Grand Haven, Mich., a. eorporationof Michigan Application December as, 1936, SeriaLNo. 117,875

4 Claims. (o1..192-1'31') This invention relates to asafety leverwhich,

while it may be used with many types of ma-- chinery, has been used by'me in conjunction with the operation of paper cutting machines.

nected by a link I I with the arm Q'previouslydescribed, and a horizontal arm I2 to which the lowerend" portion of a Vertical rod I3' is suitably connected, the rodextending for the major por- In machines which are lever operated and in tion of" its length through thetubular lever 4 5;. which there are moving partsthat are dangerous and intothe lower end of the handle portion 4a. to the hands of the operator, the present inven-- A horizontal bar l4- passes through slots I5 in tion is of particular utility as an operation canoppositesides of'the handle an, the length of the not be performed unless both hands of the 0p-- slots being' greater than the widthof the bar I4.

erator are used, thus insuring against onehand The upper end of the rod I2 is pivotally con- 10 which is not used and being accidentally placed nected to the ba l4 midway between its ends. in any position to be injured by the moving'parts Two operating bell' crank levers are mounted 0f the mac ine. as o p knife in at different vertical positions at opposite sides of paper cutting machines. the handle 4a. The-lower lever has arms I6 and An n r n in of h pre n inv n n- I T, the former extending in a substantially ver- I5 an the Construction y means f Which I tical direction and the latter outwardly in a-horiance against injury is attained may be'had from zontal direction. A link I9 connects the outer the following description takenin connection end of the arm IT with one end of the bar I4. with the accompanying drawing in which; The upper lever has vertical and horizontal arms ig- 1 s an elevation of theinovel hand lever l9 and 20 respectively. the arm 20 extending 20:

structure of my invention; outwardlyin a direction opposite to the exten- Fig. 2 is a fragmentary e e ev sion' of the arm I1. A longer link 2I connects upper part thereof, and the free end of the arm' 20 with the opposite end- Fig. 3 is a transverse section on the plane of of thebar'I I. The two bell crank levers are 5 line 33 of Fig. 1 looking downwardly in the dipartly inserted through vertical slots cut in the motion indicated by the arrows. opposite sides of the tubular handle 4a; and are Like reference characters refer to like parts'in pivotally connected on" suitable pins extending the different figures of the drawing. through the handle substantially at the angles On a suitable stationary or part I of the maof'saidlevers.

chine to which the hand lever is applied, a A coiled tension spring 22 is connected at one 30 ratchet 2 is permanently secured with the ratchet end to the arm 5 and at its opposite end to the teeth located around the arc of a circle, the arm I2. The force of the spring tends to turn center of which is the axis of av Shaft 3 Which the bell crank lever consisting of arms I0 and I2 passes t o h the ratchet member 2 and rearin a clockwise direction thereby moving the rod Wa d y into the machine having suitable connec- I3 downwardly and tilting the two levers mount- 35 tions o moving t e cutting knife, in a paper ed on the handle to the position shown in Fig. cutting machine, downwardly on counterclock- 1, wherein the vertical arms I6 and I9 are turned wise rotation of the shaft and for elevating the outwardly so as to lie at an angle to the vertical, knife on clockwise rotation thereof. A hand and extend partly beyond the adjacent opposite 0 lever 4 is keyed at its lower end to the shaft 3. sides of the handle 4a. Likewise the action of Preferably its upper portion will consist of a the spring is to turn the dog I into position to handle section 411, both the parts 4 and 4a being en age with th r tchet 2, of tubular form. To rock the shaft 3 to perform the operation A bracket having diverging arms 5 and 6 is of cutting paper for example, the ratchet 1 must secured to either the handle or the shaft or both b di i B t hands m t be d, one t 45 so as to move therewith. On the lower arm 5 a grasp and turn the arm I9 inwardly and the ratchet engaging dog I is mounted on apivot pin other to do the same thing to the arm I6. If 8 which extends through the arm 5. The dog one arm, I6 or I9, only is operated there will be is at the inner side of the arm 5 and in a posino disengagement of the dog I from the ratchet tion that when turned counterclockwise it en- 2. This insures that both hands of the operator 50 gages with the ratchet. An arm 9 is secured will be engaged with the operating lever and will to the pivot 8 at the outer side of the bracket therefore be safe from injury. In the operaarm 5. At the end of the upper bracket arm 6 a tion the lever 4 is turned to the left (referring bell crank lever is pivotally mounted. It into Fig. 1). To return the lever to its original cludes a downwardly extending arm I 0, conposition both hands are not needed as the dog 55 will slip over the ratchet teeth, but in such case the paper knife is being elevated and there is no danger of injury such as is present when the paper knife is being lowered in the operation of cutting paper.

With the structure described, the rod I3 is located for its major portion within the tubular lever 4, and the bell crank members l6 and I9 are located in narrow slots in the handle 4a which are but slightly wider than the thickness of said arms. The fingers or fleshy part of the hand are thus protected against pinching and there is little or no exposed mechanism with which the operator may come'into contact in any manner so as to prevent a liability of injury.

The construction described while of a simple character is one which has proven particularly practical and useful. The invention is defined in the appended claims and is to be considered comprehensive of all forms of structure coming within the scope of the claims.

I claim:

1. In combination, a pivotally mounted tubular lever, a ratchet associated therewith, a spring actuated dog normally engaging the ratchet, a rod located lengthwise of and within said lever for the major portion of its length, means connecting the rod with the dog whereby the dog is disengaged from the ratchet on longitudinal movement of the rod in one direction, a bar extending transversely through the lever, the upper end of said rod being pivotally connected to said bar, two bell crank handle members located in slots in opposite sides of the upper portion of said lever, one above the other, having oppositely extending arms, links connecting said arms with the ends of'said bar, and means for pivotally mounting said bell crank levers, said levershaving upwardly extending arms located in vertical slots in the upper portion of said lever.

2. Operating means for a ratchet dog associated with a pivotally mounted tubular hand lever comprising, a rod extending longitudinally through the lower portion of said lever, a horizontal bar extending laterally through said lever at the upper end of the rod, the rod having pivotal connection substantially at the midpoint of said bar and said handle having vertical slots through which the bar passes of greater height than the width of the bar, said bar adapted to slide therein, two bell crank levers located one above the other and at opposite sides of and extending into slots in opposite sides of the upper portion of the'lever, means pivotally mounting said bell crank levers on the lever, said bell crank levers having opposite outwardly extending arms,

and links connecting the ends of said arms with the ends of said bar.

3. In combination with a movably mounted hand lever of tubular form, a rod extending vertically into said hand lever at the lower portion thereof, said hand lever at its upper end portion having two vertical slots, one above the other in opposite sides thereof, and two additional vertical slots below, the first slots directly opposite each other and at the upper end of said rod, a bar extending laterally through the last mentioned slots pivotally connected at substantially its middle point to the upper end of the rod, and operating devices extending one through each of the first mentioned slots and movably mounted on the hand lever, combined with means connecting the same to the opposite ends of said bar whereby longitudinal movement of said rod in a vertical direction requires operation of both of said operating devices.

4. In combination, a tubular hand lever, said lever having vertical slots in opposite sides thereof near its upper end, one of said slots being located above the other, and also slots below the first slots directly opposite each other, a horizontal bar having a width less than the height of said last mentioned slots extending laterally therethrough, a rod pivotally connected at its upper end to said bar extending downwardly through the hand lever from the bar, flat bell crank levers, each having a-vertical arm and an outwardly extending arm inserted into the first mentioned slots and pivotally mounted on the hand lever, and links connecting the outer ends of said horizontal arms with the ends of said bar whereby on pivotally turning both of said bell crank levers inwardly so that the vertical arms thereof are brought flush at their outer edges with the outer surface of the hand lever, said horizontal bar and rod attached thereto are lifted vertically.

FREEMAN BARNEY.

Images