US787034A

US787034A - Trolley-stand.

Info

Publication number: US787034A
Application number: US24490905A
Authority: US
Inventors: Boniface A Grasberger
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-02-09
Filing date: 1905-02-09
Publication date: 1905-04-11
Anticipated expiration: 1922-04-11

Description

No. 787,084. PATENTED APR. 11, 1905.

a B. A. GRASBERGER.

TROLLEY STAND;

APPLIOATION IILIKID 1 213.9, 1905.

Wgrzvass s 1 J M combination of the Patented April 11, 1905.

PATENT OFFICE.

BONIFACE A. GRASBERG-ER, OF RICHMOND, YIRGINIA.

TROLLEY-STAND.

SPECIFICATION forming part of Letters Patent No. 787,034, dated April 11,1905.

To all whom it may concern:

Be it known that I, BONIFAOE A. GRAs- BERGER, a citizen of the United States, residing at the city of Richmond, in the State of Vir inia, have invented certain new and useful mprovements in Trolley-Stands; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to trolleystands; and it consists in the novel construction and parts hereinafter fully described and claimed. r

In the drawings, Figure 1'is a side view of the trolley-stand. Fig. 2 is a planview of the trolley-stand, partly in section. 'Fi 8* is a longitudinal section through the trol eystand, taken on line a: as in Fig. 2 and showing the toggle-links doubled up.

A is a stationary base-plate which is secured to the top of a car.

B is a frame which is pivoted on a pin 5, which projects from the base-plate A, so that the frame can be swung around in a horizontal plane to reverse the trolley. frame may, however, be connected pivotally with the base-plate by any other approved means.

C is the trolley-pole, provided with a trolley-head or sheave c, which is pressed into contact with the line-wire c. The trolleypole is secured to an arm E, which is forked, and e is a pin which pivots the lower end portion of the said arm to the frame B, so that the said trolley arm and pole can move freely in a vertical plane.

F and G are toggle links or levers. links F arepreferably provided and are pivoted to the trolley-arm E by a pinf, arranged above the said pin e. The links'F are pivoted to the link G by apin g at the bending oint or knee-point of the toggle links or evers. The toggle-links are slidable longitudinally to a limited extent, and H is a guidelink, which is pivoted to the other end of the link G from the pin 9 by means of apin h. The link H is pivoted to one end of the frame B by a pin '5, and I represents stop-lugs on Two the said toggle-link G. The stop-lugs I are provided with adjusting-screws which bear against projections J on the frame B, so that the forward longitudinal motion of the toggle-links is limited. The toggle-links are pressed forward longitudinally by means of springs K. These springs are connected to a cross-bar l: at the forward end of the frame B by means of adjustable screws 76, and the rear ends of the said springs are coupled to a cross-piece M on the rear link G by rods m. The cross-piece M is preferably arranged at the middle part of the link G, and it projects over the frame B[ A stop M prevents the said toggle links or levers from being folded downwardly.

N is a tappet which is pivoted on the pinf and which is shaped like a bell-crank lever.

The rear and'lower' end of this tappet has lugs n, which project under'the forward end portions of the links F. The upper and forwardend of the tappet N is provided wlth an adj usting-screw p, which bears against the bar or projection P on the trolley-arm E above the pin f. R is a check-spring which connects the said tappet with the cross-bar It. 'An adjustable screw 8 is provided for connecting the front end of the spring R with the cross-bar, and the rear end of the sprlng is coupled to a hook t at the lower partof the tappet, so that the adjusting-screw p 1s normally pressed against the bar or pro ection P. The use of the check-spring, however, 1s mainly to prevent the trolley-pole from dropping too hard.

When the trolley-sheave is running in contact with the line-wire, the toggle links or levers are free to move to a limited extent longitudinally, so that the trolley-sheave may adapt itself to the line-wire. When the trolley-sheave accidentally leaves the line-wire and flies upward, the bar or projection P op erates the tappet, the said bar being pressed the supports which hold the line-Wire in position. As the stops I project upward, as shown, they also act as tappets and assist in folding the toggle-links upward. One stop or tappet or two of them may be used. The rear toggle-link maybe supported and guided by one or more guide-links or by any other approved means which will permit the toggle-links to slide to a limited extent longitu dinally.

The adjusting-screws-of the tappets are desirable, as they enable the mechanism to be set with great accuracy; but the tappets could be set without these screws, if desired.

What I claim is 1. The combination, with a frame, and a trolley-arm pivoted thereto; of toggle-links pivoted to the said trolley-arm, a spring arranged between the rear toggle-link and the said frame, means for preventing the said toggle-links from folding downward, and a tappet pivoted to the said trolley-arm and operating to fold the said toggle-links upward when the trolley leaves the line-wire.

2. The combination, with a frame, and a trolley-arm pivoted thereto; of toggle-links pivoted to the said trolley-arm, a spring arranged between the rear toggle-link and the said frame, and a tappet pivoted to the said arm and provided with an end portion which projects under the front toggle-link and an upper end portion which engages with the said arm.

3. The combination, with a frame, and a trolley-arm pivoted thereto; of toggle-links pivoted to the said trolley-arm at one end and slidably supported from the said frame at the other end, a spring arranged between the rear toggle-link and the said frame, a tappet operating between the said trolley-arm and the front toggle-link, and a second tappet operating between the rear toggle-link and the said frame, the said toggle-links be ing folded upward by the oint action of the said tappets.

4. The combination, with a frame, and a forked trolley-arm pivoted thereto and provided with a projection above its pivot; of toggle-links pivoted to the said arm by a pin arranged between the said projection and pivot, a spring arranged between the rear toggle-link and the said frame, and a tappet pivoted 011 the said pin in the fork of the said arm and provided with an end portion which projects under the front toggle-link.

5. The combination, with a frame, and a trolley-arm pivoted thereto; of toggle-links pivoted to the said trolley-arm, the rear toggle-link being provided at its middle part with a cross-piece which projects over the said frame, means for preventing the togglelinks from folding downward, springs arranged between the said cross-pieee and the said frame, and tappet mechanism operating to fold the said toggle-links upward when the trolley leaves the line-wire.

6. The combination, with a frame, and a trolley-arm pivoted thereto; of toggle-links ivoted at their front end to the said arm, a fink pivotally connecting the rear end of the said toggle-links with the said frame, a tappet or stop which limits the forward movement of the said toggle-links, means for preventing the said toggle-links from folding downward, and a tappet operating between the said trolley-arm and the front toggle-link. In testimony whereof I have affixed my signature in the presence of two witnesses. BONIFACE A. GRASBERGER.

- Witnesses:

OVERTON HOWARD R. R. FLORANCE.