US1026239A - Switch for i-beam trolley-tracks. - Google Patents

Description

H. E. BALLARD.

SWITCH FOR I-BBAM TROLLEY TRACKS.

APPLICATION FILED JULY17, 1911.

1,026,239, Patented May 14, 1912.

INVENTOR COLUMBIA PLANOGHAPN c0, WASHINGTON. n. c.

UNITED STATES PATENT OFFICE.

HARRY E. BALLARD, OF I-IOLYOKE, MASSACHUSETTS, ASSIGNOR TO COBURN TROLLEY TRACK MANUFACTURING COMPANY, OF WILLIMANSETT, MASSACHUSETTS, A COR- PORATION OF MASSACHUSETTS.

SWITCH FOR I-BEAM TROLLEY- TRACKS.

Specification of Letters Patent.

Application filed July 17, 1911.

Patented May 14, 1912. Serial No. 638,836.

To all whom it may concern Be it known that I, HARRY E. BALLARD, a citizen of the United States of America. residing at Holyoke, in the county of I-Iampden and State of Massachusetts, have invented new and useful Improvements in Switches for I-Beam 'lrolley-Tracks, of which the following is a specification.

This invention relates to an in'iprovement in switches and is particulzn'ly designed for use in connection with heavy I-beam overhead trolley tracks where it is desired to allow the truck to pass from one track to another.

The invention consists, broadly, of a frame member of channel-iron construction, and mounted within this frame is a movable or switch-frame which carries sections of the track that are adapted to register with the main track; these sections may be either straight or curved.

Suitable means are provided for moving the switch-frame transversely of the maintrack and into registration therewith.

In the drawings forming part of this application,Figure 1 is a plan view showing portions of the main-track,-both the curved and the straight; also the frame within which the switclnframe is movably mounted, and cable devices for moving the switch-frame. Fig. 2 is a transverse sectional view on the line 2-2., Fig. 1. Fig. 3 is a sectional View on the line 3-3, Fig. 1, illustrating the cable devices for moving the switch-frame and the rollers attached thereto which move on the horizontal flanges of the main frame.

Referring to the drawings, in detail, a designates, as a whole, the main frame which. consists of channel-iron pieces I) that are secured to suitable I-beams c by means of bolts of, and which constitute a part of the main track. Bracket-pieces e serve to secure the side pieces of the frame to the end pieces. The lower horizontal flanges 71 of the channel-irons f are provided with tread-bars g and bolts h secure these tread-bars to the lower horizontal flanges of the channel-irons f. The tread-bars g receive the anti-friction wheels j of the movable switch-frame Zr: and are secured to the frame so as to lessen the friction when the switch-frame is moved from one position to another. This switchframe is composed of channel-irons m to which the anti-friction wheels are secured by means of the bolts 0. The channel-irons m are connected together at their ends by means of the parts 7) which are riveted to the plates that are, in turn, secured to the channel-irons m. Located within the switchframe Z: is a curved section of I-beam track 9' that is adapted to register with the main track sections c and t, and a straight I- beam section a that is adapted to register with the sections and u of I-beam construction which are secured to the main frame a, as indicated at 10.

As a means for moving the switch-frame so as to cause either the curve or the straight section of the track to register with the part 0, cables or chains :0 and y are provided which pass over sheave-wheels e that are mounted on the upper edge of the frame a.

This switch is particularly designed for overhead trolleys in which the wheels of the trucks travel on the horizontal flanges 7" of the I-beams and the corresponding flanges of the movable sections 1' and p of the frame 7a. It will therefore be seen that the movable frame Z: is capable of permitting a truck which is supported on the main I- beams c or w to pass either in a straight direction, by means of the section 79, or in a curved direction by means of the section 9'.

A suitable stop plate is attached to the movable frame Z', as shown at 70 which is for the purpose of blocking the end of the main section w when the curved track is in use, preventing derailment of the trolley truck.

\Vhat I claim, is

1. In an overhead trolley switch of I-beam construction a main frame composed of channel iron and supported on the end sections of the main track, a track on a flange of the main frame, a frame mounted for transverse movement in the main frame and provided with antifriction rollers to engage the track on the web of the main frame, sections of I-beams mounted in the movable frame and adapted to register with the end sections of the main track.

2. An overhead trolley switch for trolley tracks that are adapted to run on the flanges of I-bcams, an open rectangular shaped fixed frame formed from channel iron, a movable frame located within the fixed frame, sections of I-beams mounted in the movable frame and adapted to register with the end portions of the I-beams of the main tracks when the movable frame is operated, a stop device in the movable frame to prevent a trolley truck from becoming derailed if the movable frame is in a certain position, and cable devices to operate the movable frame.

3. An overhead trolley switch construction having in combination With the end sections or portions of the main tracks to permit a trolley truck to pass from a main track to either one of the other tracks, a main frame composed of channel-iron and supported on the ends of the main tracks, tread-bars secured to a horizontal Web of the HARRY E. BALLARD.

Witnesses:

AzIo A. OOBURN, GEO. D. MILLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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