US1951088A - Crane safety device - Google Patents

Description

March 13, 1934. FEELEY r AL 1,951,088

CRANE SAFETY DEVICE Filed Dec. 31, 1931 2 Sheets-Sheet l [QM/4E0 J FEELEY and DAN/EL LYNCH.

March 13, 1934- E. J. FEELEY ET AL CRANE SAFETY DEVICE Filed Dec. 51, 1951 ZSheets-Sheet 2 [meniorsr Eon Hep J FEELEY and DFiN/EL A Y/VCH 1%e/f4/fO/77t fl6i Patented Mar. 13, 1934 CRANE SAFETY DEVICE Edward ."B'. Feeiey and Daniel Lynch, .loliet, 111., assignors to The American Steel and Wire Company of New Jersey, a corporation of New Jersey Application December 31, 1931, Serial No. 584,201

3 Claims.

This invention relates to a safety device for attachment to traveling cranes, one of the objects being to prevent the accidental unloading of an elongated carrier, being moved by such a crane, when the load on this carrier unexpectedly shifts.

Having reference to the accompanying drawings, Figure l is a side elevation of one form of the invention and Figure 2 is an end elevation of Figure l.

The drawings show a traveling crane consisting of a bridge 1 that can run back and forth, carrying a carriage 2. This carriage lifts through the medium of a cable 3, the load in this instance comprising a long carrier 4 holding bundles of rod 5.

When the crane first started to lift this carrier the bundles were properly placed to balance it in a horizontal position. Now, however, these bundles have unexpectedly shifted to the right, while being moved, causing the carrier to leave its horizontal position. Such a condition is ordinarily quite dangerous because of the possibility of the carrier tilting until the bundles are unloaded. This is prevented by means of a depending frame 6 that is fixed to the carriage 2 so as to move with it, and carries a pair of horizontally alined bumpers 7 equaily spaced about the lifting cable 3.

The drawings show the high end of the carrier 4 engaging one of these bumpers and being thus held against further tilting. A pair of vertical guides 8, having outwardly inclined ends 8 are connected to each end of the depending frame 6. A spring 9 is provided for both pairs of vertical guides 8 and adapted to receive a 16, which is connected to each of the bumpers 7. An abutment ii is secured to each of the rods 10 and adapted to make contact with the outer convolution of the lower ends of the springs 9.

A pair of plates 12 and 13 are mounted on each pair of vertical guides 8 and are suitably apertured to receive the rods 10, the former serving to confine the abutments 11, while the plates 13 restrict the upward movement of the springs 9. It will thus be seen that bumpers '7 will be cushioned iency of the springs 9.

shock directed to the through the resil- The invention is particularly useful when objects are to be rnoved from one end of a shop to another, as it is then that the crane operator draws the object being lifted up nearly to the bridge.

While a been shown and describ patent statutes, it is to specific example of the invention has ed in accordance with the be understood that it is not intended to limit the invention exactly thereto, except as defined by We claim:

the appended claims.

1. In combination with a traveling crane, a crane carriage, a depending frame fixed to said carriage, guide members provided with outwardly inclined ends associated with said frame, and resilient bumpers mounted for movement in said guide members.

2. In combination with a traveling crane, a depending frame fixed to the carriage of said crane,

guide members having associated with said rod-receiving holes fixe outwardly inclined ends frame, spaced plates having d to said guide members,

a rod extending through the holes in said plates, an abutment fixed to said rod, a spring mounted on said rod and in contact with said abutment and one of said plates, and a bumper portion mounted on the outer end or" said rod.

through the holes in said plates, an abutment fixed to said rod, a spring mounted on said rod and in contact with said abutment and one of said plates, the outer end of said ro members.

and a bumper portion mounted on d and between said guide EDWARD J. FEELEY. DANIEL LYNCH.

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