US703311A

US703311A - Street-railway switch.

Info

Publication number: US703311A
Application number: US8248501A
Authority: US
Inventors: George Shoemaker
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-11-15
Filing date: 1901-11-15
Publication date: 1902-06-24
Anticipated expiration: 1919-06-24

Description

No. 703,3n1'

, Patented .Iune 24, I902. G. SHUEMAKEB. STREET RAILWAY SWITCH.

(Application filed Nov. 15, 1901.)

2 Sheets-Sheet I.

(No Model.)

witness-82 .{3117/ law): M w WW MZM?% c m: xnwms PETERS cu. PHOfO-UTNQ, WASNYNGTON. u

No. 703,3". Patented June 24, I902.

G. SHDEMAKER.

STREET RAILWAY SWITCH.

(Appliation filed Nov, 15, 1901.) (No Model.)

2 Sheets-Sheet 2.

all 427?.6 W F A, E i

all 7 F?- 7- 4 i "Fwm L T I o O o O o O ,O O ,9 0

cl cl T Vizzwsses. jrzvenzoz:

WQh

FHOTO-LWHO" WASHINGTON n c UNTTED STATES P TENT OFFICE.

GEORGE sI-IO MAKER, or PHILADELPHIA, PENNSYLVANIA.

STREET-RAILWAY SWITCH.

SPECIFICATION forming part of Letters Patent N 0. 703,311, dated June 24, 1902. Application filed November 15, 1901. Serial No. 82,485. (No model.)

To aZZ whom, it may concern.-

Be it known that I', GEORGE SHOEMAKER, a citizen of the United States, residing at Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Double Tread and Groove Street-Railway Switches, of which the following is a specification.

My invention relates to improvements in street-railway switches upon which a double groove is channeled in thetongue, the tongue itself havingasemicircular end, with a radius of one-half of the required width of the tongue, and having the point of tangency within the length of it.

The objects of myinvention are,first,to combine a more permanently rigid and smoothlyworking switch and provide a switch-tongue incapable of distortion by the lateral thrust of a car-wheel upon it in making the curve or by heavy wagons using the car-track. These objects are attained by the mechanism illustrated in the accompanying drawings, in which Figure l is a top View of the switch set for the straight track. Fig. 2 is a bottom view; Fig. 3, a side view, and Fig. 4 a sectional view taken on the line 3/ y. Fig. 5 is a perspective view of the complete switch. Fig. 6 is a top view of the tongue. Fig. 7 is a side view of the tongue. Fig. 8 is a view of one of the guard-angles. Fig. 9 is a perspective view of one end of the guard-angles on a larger scale, and Fig. 10 an enlargedsection taken on the line so at.

Similarletters refer to similar parts throughout the several views.

The tongue A is dovetailed into the bed B at each end at an angle of sixty degrees at the points a a. The joint to being semicircular dispenses with the use of apin to secure it to the bed B, and the joint a, being a segmental curve described from the pivotal point within the semicircular joint a, makes it easy of motion back and forth; The two guard-angles 0 being formed with an angular piece 0 to fit the sides of the tongue'A and secured to the bed 13 by means of the bolts 0', inserted through the holes 0, prevent the tongue A from being thrown out of its proper position and provide a means by which it may be thrown into position, if slightly out, by the flange of a car-wheel moving in the grooves a. For economizin g the necessary materials I make in the under side or bottom of the bed B three hollow places d and in the ends cast sections of the rail E, securing them by means of the oblong apertures f therein.

While I prefer the minor details of the construction,it is apparent that they may be modified without departing from the invention.

What I claim, and desire to secure by Letters Patent, is-

1. In a double tread and groove railwayswitch the combination of a pinless'tongue for tongue-switches and tongue mates,'formed with perfectly semicircular heel, the full width of itself beveled downwardly on all edges and having a bearing on three of its edges at either of its positions, and a switchbed with a semicircular undercut atits heel, a segmental undercut at'its point, to firmly dovetail the switch-tongue to the bed at both its ends, and two guard-angles formed and adjusted to give a side bearing to the tongue in either of its positions.

2. The tongue A, having two grooves a, and two treads, and beveled from the top sixty degrees downwardly on all edges to a flat bed, and dovetailed therein, substantially as shown.

GEORGE SI-IOEMAKER. Witnesses:

JAMES C. FERNALD, MARTIN L. HOFFMAN.