US893169A - Detector-bar. - Google Patents

Description

N0. 898L169. I PATENTBD JULY 14, 1908.

- J. s. HOB'ASON.

DETECTOR BAR. APPLICATION FILED 0GT.22, 1907.

2 SHEETS-SHEET 1.

No. 893,169. 4 PATENTED JULY 14, 1908.

J. s. 'HOBSON.

. DETECTOR BAR. APPLICATION FILED OCT 22 1907 2 SHEETS-SHEET 2.

JOHN S. HOBSON, EDGEWOOD PARK, PENNSYLVANIA.

DETECTOR-BAR.

Specification of Letters Patent.

Patented July 14, 1908.

Application filed October 22, 1907. Serial No. 398,677.

To all whom it may concern:

Be it known that 1, JOHN S. HoBsoN, a citizen of the United States, residing at Edgewood Park, in the county of Allegheny and State of Pennsylvania, haveinvented certain new and useful Improvements in Detector-Bars, of which the following is a specification.

My invention relates to detector bars, which, as is well known in the art, are used in connection with railway switches.

My invention particularly relates to detector bars located on the inside of a rail as distinguished from the outside of the rail which has been the usual arrangement heretofore.

An advantage of using, what may be termed an inside detector bar, resides in the fact that with an inside detector bar all danger of the bar being thrown when a car or train is over it is entirely eliminated, since an inside detector bar would strike directly against the flange of a car wheel, whereas an outside bar has only that portion of the wheel projecting beyond the rail head to engage. Thus a greater factor of safety is obtained by the use of an inside detector bar.

I will describe a detector bar embodying my invention and then point out the novel features in claims.

In the accompanying drawings, Figure 1 is a side elevation of an inside detector bar embodying my invention. Fig. 2 is a vertical cross sectional view taken on the line 22 of Fig. 1. Fig. 3 is a vertical crosssectional view taken on the line 33 of Fig. 1. Fig. 4 is a detail view, in side elevation of a modified form of motion late in connection with a detector bar an embodyin my invention. Fig. 5 is a vertical sectiona view taken on the line 55 of Fig. 4.

Similar letters of reference deslgnate corres onding parts in all of the figures.

designates a railroad rail, and B a wheel of a car traveling along the rail. C designates a detector bar which as shown is located alongside the rail A in such position as to engage the flange of the wheel B when it is raised. This arrangement necessitates the detector bar being arranged on the inside of the rail. As shown the detector bar C is made from a channel iron or from two or more pieces 0 of angle iron which are bolted or riveted together at suitable points in such manner as to form a channel bar or to be U-shaped in cross section. The detector bar is supported in position alongside the rail by means of one or more clips D which are suitably secured by bolts d to the rail. Means are rovided between the bar and clip for causing the bar to rise and fall along the rail, as well as means for preventing lateral and vertical displacement of the bar relatively to the rail. The clips D of Figs. 1 and 2, as shown, comprise two upright portions or walls (1, (Z and a cam surface (1 having oppositely inclined sides.

J ournaled within the side walls of the detector bar is one or more rollers 0 (according to the number of clips D employed) which are designed to travel up and down the oppositely inclined sides of the cam surface (Z when the detector bar is moved longitudinally by any desired means. The walls d, d of the clips prevent any lateral movement of the detector bar, and means are also provided for preventing the detector bar being lifted out of the clips. As shown in Figs. 1 and 3, these means take the form of bolts or pins E provided at intervals in the detector bar. 'ject beyond the detector bar in such position as to engage the head of the rail when the detector bar is lifted vertically. If desired the cam surface may be carried by the detector bar and the roller by the clip.

Referring now to Figs. 4 and 5, the same form of detector bar is used, while a diiferent form of clip is employed. In addition to the cam surface (1 an angular groove d (preferably conforming to the cam surface d is employed in which an end or head of the journal in of the rollers 0 projects. The groove (1 and head of the pin are for the same function as the pins or bolts E and also for the purpose of forcing the detector bar downward after The ends of the bolts or pins E proit has passed over the apex of the cam surroller travels, and means for limiting the 10 face d upward movement of the bar.

Having thus described my invention, what In testimony whereof I have signed my I claim as new is name to this specification in the presence of The combination with a detector bar U- two subscribed witnesses. shaped in cross-section, of a roller journaled JOHN S. HOBSON. in the Walls of the detector bar, a clip for sup- Witnesses: porting said bar in position, said cli having W. L. MODANIEL,

side walls and a cam surface over w ich the R. L. KIsTLER.

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