|Publication number||USRE36542 E|
|Application number||US 08/999,673|
|Publication date||Feb 1, 2000|
|Filing date||Aug 27, 1997|
|Priority date||Oct 20, 1994|
|Also published as||CA2160973A1, CA2160973C, US5480112|
|Publication number||08999673, 999673, US RE36542 E, US RE36542E, US-E-RE36542, USRE36542 E, USRE36542E|
|Inventors||Thomas P. Painter, Jr., Gary A. Obenchain, Morris L. Myers, Charles S. Christy, James D. Rhodes|
|Original Assignee||Norfolk Southern Railway Co.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (14), Non-Patent Citations (2), Referenced by (1), Classifications (7), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention relates to railroad switch stands for operating railroad switches, and more particularly to manually operated switch stands which include a handle means in the form of a throwing lever which is usually formed of a heavy metal bar which may have a weight at the outer end thereof. This type of switch stand is disadvantageous primarily because a great deal of force is required to throw the switch. This has resulted in injuries of railroad personnel caused by actual throwing of the switch. Such injuries are due to the heavyweight of the handle means and are compounded by the necessity of bending over to an excessive extent in order to grasp the handle means which is spaced only a short distance above the ground.
According to the present invention, the prior art handle means of the lever type is redesigned enabling the operator to throw the switch with greater ease and under safer conditions. The present handle is lighter in weight and its shape is such that in either of its two operative positions, the handle means includes a portion which extends upwardly a substantial distance above the ground to thereby minimize the amount of bending required to grasp the handle.
The handle part of the invention is formed of a combination of solid and tubular metallic portions which provide the necessary strength while slightly reducing the weight of the handle means. Such portions include a cross-member which rigidifies the structure of the handle means. Wear plates are also provided at the inner end of the handle structure to avoid undue deterioration each time the handle engages conventional latch means at the switch.
The tubular and solid portions form an open framework having an external configuration which is generally triangular in shape, with the apex of the triangle disposed at the inner end of the handle part where it is connected to a stub portion of the handle means. With this construction, the outer end of the handle means presents a portion extending upwardly which can be readily grasped by railroad personnel when it is desired to throw a switch. It has been found that the force required to operate a switch stand according to the present invention is approximately one-half that required to operate a prior art switch stand having a conventional lever type handle means.
FIG. 1 is a front view of the handle means of the invention;
FIG. 2 is a top view of the handle means shown in FIG. 1;
FIG. 3 is a front view of a railroad switch stand incorporating the handle means of the invention; and
FIG. 4 is a top view of the switch stand shown in FIG. 3.
Referring now to the drawing wherein like reference characters designate corresponding parts throughout the several views, there is shown in FIGS. 3 and 4 a switch stand of conventional construction indicated generally by reference numeral 10 and including a cover 12 and a bottom part 14 which is supported on pair of headblock ties 16 extending laterally outwardly of the usual railroad ties (not shown). The bottom part of the switch stand is connected to the headblock ties by a plurality of track spikes or bolts 18 which pass through suitable holes provided through laterally extending flanges formed on die bottom part.
A conventional connecting rod 20 has one end operatively connected to the switch stand in the usual manner, and the opposite end of the connecting rod is connected to a railroad switch. The connecting rod is adapted to be reciprocated in opposite directions as indicated by arrow A, and is reciprocated in response to pivotal movement of the handle means indicated generally by reference numeral 22. The handle means is adapted to be latched in its two operative positions indicated in FIG. 3 by full lines and phantom lines by conventional latch stands 24 and 26 which are provided with foot pedals 28 and 30 respectively for selectively releasing the latch stands when desired to allow the handle means to pivot into a different operative position when desired. Latch stands 24 and 26 are supported on the headblock ties and are secured in place by suitable studs 30 and 32 respectively which extend through suitable holes provided in the bases of the latch stands.
Referring now to FIGS. 1 and 2, the handle means of the invention is illustrated. The handle means includes a portion 40 formed of a heavy metal bar. Stub portion 40 is connected to a pinion shaft 42 having a pinion gear 44 fixed to one end thereof. The pinion shalt is supported for rotation by the switch stand in the usual manner, and the pinion gear engages a conventional segment gear of the switch stand. The handle means 22 is accordingly mounted for pivotal movement about a pivot axis extending longitudinally through the center of the pinion shaft 42.
The handle means includes an inner end indicated generally by reference numeral 50 which is adjacent the pivot axis of the handle means. The handle means also includes an outer end indicated generally by reference number 52 which is disposed remote from the pivot axis. The inner end 50 has a first dimension extending along an are having the pivot axis as its center, and the outer end 52 has a second dimension extending along an are having the pivot axis as its center. The second dimension is many times greater than first dimension to define a handle means which is of generally triangular configuration which can be clearly seen in FIG. 1.
The handle part which is connected to stub portion 40 comprises a pair of angularly related members 54, 56 which may be of one inch solid steel of either round or rectangular cross-section, as desired. Members 54, 56 extend away from the pivot axis and diverge from one another. The handle part further comprises a bent tubular member 58 which may be of one and one-quarter inch tubular steel having a bight portion 60, opposing essentially perpendicular sections 62 and 64, and legs 66 and 68 forming extensions of members 54, 56. Legs 66 and 68 are respectively telescoped over members 54 and 56 and welded thereto.
In order to rigidify the handle means, a tubular cross-member 70, which may be if one and one-quarter inch tubular steel, has the opposite ends thereof connected by welding to legs 66 and 68 adjacent to ends thereof. Gusset plates 72 are welded to cross-member 70 and legs 66 and 68, and gusset plates 74 are welded to cross-member 70 and 60 members 54 and 56, to enhance the rigidity and stability of the handle.
The inner end 50 of the handle means is provided with steel wear plates 76 surrounding and welded to portion 40 and inner sections of members 54 and 56, the wear plates serving to avoid wear due to abrasion when engaging foot pedals 28 and 30 and the opposing stops as shown in FIG. 4 when the switch handle is thrown between its solid outline and phantom outline positions of FIG. 3.
A handle part of the switch handle according to the invention is fabricated to include an inner end having a pair of solid steel members disposed adjacent one another and diverging from one another in a direction away from die inner end to outer ends which are connected to a tubular steel member having a tubular bight position thereby defining a generally triangular configuration. A tubular cross-member is connected between the legs of the tubular member at to rigidify the construction, and wear plates are fixed to the inner ends of the solid steel members and to the steel portion to avoid undue wear od the switch handle during operation.
The invention has been described with reference to a preferred embodiment. Obviously, various modifications, alterations and other embodiments will occur to others upon reading and understanding this specification. It is our intention to include all such modifications, alterations and alternate embodiments insofar as they come within the scope of the appended claims or the equivalent thereof.
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|US256798 *||Jan 11, 1882||Apr 18, 1882||Oes to themselves|
|US401671 *||Sep 5, 1888||Apr 16, 1889||Charles alkins|
|US568938 *||Dec 20, 1895||Oct 6, 1896||Railroad-switch stand|
|US569730 *||Mar 10, 1896||Oct 20, 1896||Railway-switch|
|US587689 *||Jul 21, 1894||Aug 10, 1897||Switch-stand|
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|US885160 *||Dec 20, 1907||Apr 21, 1908||Standard Equipment Company||Switch-stand.|
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|FR2378974A1 *||Title not available|
|1||*||ABC Rail Corporation Drawing, Model No. 22 P Switch Stand Apr. 14, 1992.|
|2||ABC Rail Corporation Drawing, Model No. 22-P Switch Stand Apr. 14, 1992.|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US6471163||Oct 9, 2001||Oct 29, 2002||Union Switch & Signal, Inc.||Ergonomic hand throw arm for railroad switch mechanism|
|International Classification||B61L5/02, B61L5/00|
|Cooperative Classification||B61L5/00, B61L5/02|
|European Classification||B61L5/00, B61L5/02|
|Feb 11, 2003||CC||Certificate of correction|
|Jul 28, 2003||SULP||Surcharge for late payment|
Year of fee payment: 7
|Jul 28, 2003||FPAY||Fee payment|
Year of fee payment: 8
|Mar 21, 2007||FPAY||Fee payment|
Year of fee payment: 12