US1517737A

US1517737A - Power transmission

Info

Publication number: US1517737A
Application number: US302566A
Authority: US
Inventors: Augustus F Klasing
Original assignee: KLASING CAR BRAKE Co
Current assignee: KLASING CAR BRAKE Co
Priority date: 1919-06-07
Filing date: 1919-06-07
Publication date: 1924-12-02
Anticipated expiration: 1941-12-02

Description

' Patented Dec. 2, 1924.

7 UNITED STATES AUGUSTUS I. KLASING, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE KLASING BRAKE COMPANY, A CORPORATION OF COLORADO.

CAR

POWER TRANSMISSION.

Application filed June 7-,

To all whom it may concern."

of the United States of America, have in- CID vented a certain new and useful Improvement in Power Transmissions, of which the following is a specification.

My invention relates to improvements in power transmission in which a bell crank lever is used to transmit the power. 'Among my primary objects is the compounding of movements-in one operation so as to accomplish the most immediate take-up of slack and the most instantaneous release. I also contemplate the concentration in a simple single device the largest number of contracting movements. A more specific object is the production of a mechanism for use in car brakes. It is well known in the art that a certain amount of slackexists as a primary condition between the point of powerutilization and the point of power delivery in all car braking mechanism. In all such cases it is essential that the slack be taken up in the shortest space of time and in a comparat-ivel small area while developing and deliverlng the desired power. A converse necessity in power transmitting apparatus of this character is to obtain the nearest possible approach to instantaneous efiicient release.

This application as to its broad claims is related to my prior application, Serial No. 220,467 filed March 5, 1918; and my application Serial No. 260,018 filed October 28, 1918, the general principles herein illustrated and claimed being originally illustrated in combination in the said applications.

My invention consists primarily of a bellcrank-lever and its adaptation as set forth in the following specifications.

Fig. 1 shows the device in its initial stage of actuation.

Fig. 2 is a perspective of the device in its ultimate position of delivery.

Fig. 3 is a sectional view of the fulcrum.

Fig. 4 is a side view of the lever. I

In the device as shown, the reference numeral 1 designates a fulcrum member adapted to be fixedly attached to some part of a car or other mechanism. The fulcrum member is provided with a tooth rack 2 which projects at an angle from the base, and is provided with a pair of flanges 3 which enclose the tooth rack 2. The inner 1919. Serial No. 302,566. I

faces of the flanges 3. are provided with guideways 4 which extend from "the end of theflanges nearest the base of the fulcrum 1 to a point near the other end of the flanges and are adapted-to receive and retain an axis 8 to be hereinafter described. A screw bolt is adapted to be inserted in the threaded opening 5 after the bell-crank is positioned in the guideways, and to project downwardly so as to prevent the removal of the bell crank from the guideways. A bellcrank-lever 6, having a mutilated spur gear 7 as the pivotal point thereof, is provided adjacent to said gear 7 with trunnions 8 adapted to fit movably in the guideways t. The power arm 9 of the bell-crank 6 is provided with an attaching point 10 to which a suitable operating rod is secured. The power delivery arm 12 of said bell crank 6 is provided with a chain attaching point 11 which is preferably located at a point on.

the power arm 12 at one end of an elliptical segment 13. The segment 13 is designed with the arc of greatest radius with respect to the pivot point adjacent to the point of chain attachment 11 so as to secure quickest draught at initial actuation and to have the arc of smallest radius at the opposite end of the segment so as to secure the application of the greatest. force on the chain or other draft element. ,This segment 13 described upon the arm 12 has a channel 14 provided upon its face to receive a chain, and give to said chain a changing point of draft.

In the assembly of said device the bellcrank 6 is brought into contact with the fulcrum l by inserting the same in the guideways 4 at such a position that the tooth 7 meshes with the rack 2 at 2*, audit will be apparent that as the bell-crank is functioned the gear teeth 7 will advance along the rack 2 until the fulcrum point has reached the extremity of the rack 2.

The operation of the device is as follows: Force, such as an upward pull applied to the arm 6 at the point 10, causes the bellcrank to rock and at the same time travel bodily down the inclined rack 2. This has the effect of increasing the travel of the draft element or chain attached-at thepoint 11, over that resulting merely from the rocking of the bell crank. In addition the chain winds in effect on the curved segment 13. Asdescribed above, this segment is so roportioned that the effective length. of the through an angle, comprising a bell crank lever having meansat the ends thereof lever arm 12 gradually diminishes as the bell crank rocks, so as to permit the application of a greater pull at or, near the end of the travel. Upon a reverse movement of the arm 6 the bell-crank travels upwardly on the rack and toward the point of delivery for the application of the pull and a fulcrum intermediate its ends and means for causing the fulcrum of the lever to travel in a direction opposite to the direction of pull on said bell crank.

2. In a. device for transmitting power through an angle, the combination of a-lever having a fulcrum intermediate its ends and means on said lever for the application of power, a base for said lever and means for causing said fulcrum to travel on said base in a direction oblique ,tothe directions .of the pulls applied to and transmitted by said bell crank. o

, 3. In a device for transmitting power through an angle, the combination of a bell crank having a moving fulcrum intermediate its ends, a base for said bell crank and means on said base for guiding the movement of said fulcrum on said base.

4. In a ,device for transmitting power through an angle, the combination of a bell crank having a curved rack as a fulcrum, intermediate its ends, a base for said bell crank having a rack, with which said curved rack meshes for causing said fulcrum to move duringthe oscillation of said bell crank.

5. In a device for transmitting power through an angle, the combination of a bell crank having a curved rack as a fulcrum intermediate its ends, a base for said bell crank having a rack inclined in a direction opposed to the lines of transmission of power and with which said curved rack meshes.

6. In a device for transmitting power through an angle, the combination of a bell crank having a curved rack as a fulcrum intermediate its ends, a base for said bell crank having a rack inclined in a direction at angles to the lines of transmission of power and with which said curved rack meshes, and means for retaining said bell crank in mesh with said rack.

7. A rocking and rolling transmission device comprisingin combination a bell crank lever provided with laterally projecting trunnions, an arcuate pinion adjacent said trunnions, and a "fixed supporting member consisting of a channel shaped member having an interiorrack formed therein adapted to mesh with said pinion, and internal recesses in the side members of said channel for receiving said trunnions.

8. A power transmission device comprising in combination a bell crank lever having a pair of arms and an intermediate fulcrum, means for applying power to one of said arms, a winding surface on the other arm, upon which a flexible element is adapted to wind during the transmission of power, and means for causing the fulcrum of said lever to travel bodily in a direction away from the directions of the pulls applied to and transmitted by said bell' crank. '9, A power transmission device comprising in combination a rocking transmission element consisting of a bell crank having thereon a curved rack intermediate its ends, astationary rack upon which said curved rack is adapted to travel when said transmission element rocks, means for applying power to saidtransmission element and means comprising a winding surface for delivering the transmitted power, said stationary rack being so positioned with respect to the direction of pull that the transmission element will travel in a direction opposed to that of the application of power durin the transmission ofpower.

10. 111 a power transmission device, in combination, a rocking transmission element comprisin a pair of. lever arms and having a toot .ed pinion at the fulcrum there of, a stationary rack upon which said pinion is adapted to roll when said transmission element is rocked, one of said lever arms .a segmental gear intermediate 'its ends, a

rack on which said gear is adapted to roll,

and transmission members attached to opposite ends of said lever,

12. In combination a bell crank having a segmental gear intermediate its ends, a rack on \Which said gear is adapted to .roll, :1 pull rod attached to one end of saidlever, and a chain attachedto and adapted to wind upon the other end of said lever.

13. In combination a bell crank having a segmental gear intermediate its ends, a rack on which said gear is adapted to roll, and transmission members attached to op posite ends of said. lever and adapted to move in the direction oft-heir length, said rack being oblique t0"said directions of movement of said transmission members.

14. In combination an inverted channel shaped member having a rack on its under surface andlongitudinally arranged recesses in its side flange, a bell crank having a segmental gear intermediate its ends to mesh with said rack and trunnions concentric with said gear to enter said recesses, and transmission elements connected with the ends of said bell crank respectively. I

15. In combination an inverted channel shaped member having an inclined rack on its under surface and longitudinally arranged recesses in its side flange parallel with said rack, a bell crank having a segmental gear intermediate its ends to mesh with said rack and trunnions concentric with said gear to enter said recesses and transmission elements connected with the ends of said bell crank respectively.

16. In combination an inverted channel shaped member having an inclined rack on its under surface and longitudinally arranged recesses in its side flanges parallel With said rack, a bell crank having a segmental gear intermediate its ends to mesh with said rack and trunnions concentric QNltll said gear to enter said recesses and transmission elements connected with the ends of said bell crank respectively, one of said transmission elements consisting of a pull rod pivoted to the bell crank and the other consisting of a chain adapted to Wind upon the other end of said bell crank said rack being directions of movement of said pull rod and chain.

Signed at Chicago, Illinois, June 2, 1919.

I AUGUSTUS F. KIJASING.H

disposed obliquely to the