US1477500A - Stop block - Google Patents

Description

Dec v j Filed Oct. 1. .1925

JJROW Federated Dec. il, '1.923.

narran JOHN JOHNSON, OF PLYMOUTH, PENNSYLVANIA.

STOP BLOCK.

Appncation inea october 1, 1923. serieu No 665,876.

To all whom it may concern Be it known that l, JOHN JOHNSON, a citizen of the United States, residing at Plymouth. in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Stop Blocks, of which the following is a specification.

This invention relates to a stop block, and particularly to a construction disposed to engage a car wheel in its travel over a traction rail in order to prevent further movement of the car thereon. In previous constructions of this character the block is mounted for operation in only one direction so that the device is limited in the scope of its application for different conditions in railroad operation. Such blocks are also mounted for a free rotary movement and the travel thereof is not positively limited when the lrblock is in engaging position, while the strain of impact with the car wheel is borne by the pivot of the block and it is important that this pivot be of fixed character in order to secure accurate alignment of the block with the rail tread when it forms a section thereof.

The invention has for an object to provide anovel and improved construction of stop block having opposite wheel Contact faces either of which is adapted to be shifted into position for use whereby a reversible stop is provided to prevent movement of a car upon a rail in opposite directions.

A further object of the invention is to provide a construction of Iblock having a fixed pivot and an abutment face at one side thereofdisposed to cooperate with a similar face upon a base to positively limit the travel of the block when in contacting position and to provide a rigid support for the wheel pressure thereon disposed in a direct linev from the point of wheel contact.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

1n the drawing Figure 1 is a side elevation showing the invention applied;

Figure 2 is a section on line 2 2 of Figure 1;

Figure 3 is an enlarged detail on line -3-3 of Figure 2.

Like numerals refer to like parts throughout the several gures of the drawing.

This invention is adapted for application in connection with the usual traction rails for cars and is herein shown as comprising a section of the tread of such rails although not confined to such specific application. In the present disclosure of the invention the numeral 10 designates a base plate which may be of any desired size or configuration and preferably extends beneath the traction rails 1l which are supported at their adjacent ends thereon as shown in Figure 3. This base is provided at proper positions with a bearing block 13 and cooperatin cap plate 14 to receive the rotatable sha t 15 which carries the stop block 16 secured thereto in any desired manner. A desirable form of such attachment comprises a locking key 17 upon the shaft extending through a similar aperture in the block so as to effectually key the block upon the shaft.

The portion of the shaft which is supported by the bearings is of circular configuration, as usual, and the end of the shaft which carries the operating levery 18 is also formed of angular cross section, as indicated at 19 in Figure 1, which receives an angular socket 2O carried by the lever 18. The upper face 21 of the stop block 16 comprises a tread portion cooperating with the tread of the rails 11 so that when in horizontal position as shown by full lines in Figure 3 a continuous rail tread isA formed.

For the purpose of adapting this block for operation in reverse positions to hold a car against movement in opposite directions, the block is provided at opposite sides of its axis with abutment faces 22 preferably of inclined character adapted to cooperate with a similar face 28 upon the base 10. The face 23 terminates at its lower portion in a pit 241 adapted' to receive any dirt or foreign matter which may enter the block mounting` so as to prevent clogging of the action of the block. It will be seen that the movement of projecting one end of the block causes the opposite end to ride downward into contact with the seat 23 and such movement With the abutment faces at the opposite sides of the block so that the strain of impact and the pressure of the car ivhecl pressure.

against the block is carriedl by the abutting faces and the pivot shaft relieved of such As a result the shaft can always be freely turned to shift the block even though the car Wheelis resting in contact therewith.

Any preferred means may be used for shifting the block in its opposite positions or maintaining it level to form a continuo-us treachand l have shown a preferred form in the lever 18 which is held in its adjusted positions by means of a spring actuated latch bar 26 adapted to be released by a handle 27 and to engage a series of sockets 28 in the sector 29 supported by standards 30 from the base l0. Y

The invention is adapted for application to either or both rails, and is shown in Figure? as comprising a Vplurality of the stop blocks mounted for cooperation with the parallel rails.

vThe operation of the invention will be apparent from the foregoingI description,

A'and it Will be seen that when the lever is4 in the central position of Figure l a substantially continuous rail tread is provided, While if shifted to the dotted line position in-that figure a stop or chock is provided against the movement of a car wheel toward the right. y

In the reverse position of the block as indicated by dotted lines in Figure 3, the lever is shifted to the opposite position at ltheV left of the sector. This provides a. form of stop block adaptednot only for inclined Ways but also for substantially level construction in Which it may be desired to provent movement of a car in opposite directions such as upon a switch or similar' rail construction. The construction also prov vides means by which the operating lever may be disposed at either side of the track as the block is capable of operation in either direction thus avoiding the necessity of separate constructions for different positions of application. The position o-f the abut-- ment faces forms a positive limit to the upward travel of the contacting end of the stop so that the pressure o-r tendency of the stop to move further' by contact with the Wheel is avoided. and such strain removed from the controlling' lever, While these abutment faces further receive and carry the entire' pressure stra-in in order to relieve the pivots thereof.

lll/'hilo the specific construction of the block and its opera-ting means has been herein sho-Wn and described, still the invention is not confined thereto as changes and alterations kmay be made Withoutdeparting from ters Patent is 1-1. A stop block provided with opposite Wheel contactV faces, andV means by which either of said faces may be shifted in position for use. Y a

2. A stop block provided with opposite Wheel Contact faces, means by whichv either of said faces may be shifted in position for use,v and means limiting the movement of said block into such position.

3. A stop block provided Withopposite Wheel Contact faces, means by which either of said faces may be ,shifted in position for use, and means limitinsr'the movement of said block into such position and providing a pressure abutment for said block.

4:, A stop block provided With a fixed pivot and an abutment face at one side therof, and a base provided with a. cooperating face t-olimit the travel of the block and provide a rigid support for the Wheel pressure thereon. Y

5. A reversible stop-block having a fixed pivot, abutment faces at the opposite sides of said pivot, and a base provided with cooperating abutments at the opposite sides cf the block pivot. .y

6. A reversible stop block having a fixed pivot., abutment faces at the opposite sides of said pivot, and a base provided with a receiving recess beneath the block pivot and cooperating abutment faces at opposite sides of said recess.'

7. A reversible stop block pivoted for oscillation in opposite directions to project either end thereof above an adjacent track rail, an operating lever secured to the pivot of said block, a latch carried by said lever and retaining means cooperating with said latch to hold said block in its horizontal or either of its tilted positions.

8. A stop block comprising a body having a tread upon its upper face, angular abutment faces disposed at the opposite ends of said body, a base having faces to cooperate With said abutments, and a fixed central pivot secured to said block.V

9. A stop block comprising a. body having a fixed pivot and a tread upon its Vupper face, angular abut-ment faces disposed at the opposite ends of said body, a base hav- 1 ing` faces to cooperate with said abutments,

JOHN JOHNSON.

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