US878484A - Mechanism for locking trolleys. - Google Patents

Description

PATENTED FEB. 4, 1908.

E. Y. MOORE. MECHANISM FOR LOOKING TROLLBYS.

APPLICATION I'ILED AUG. 17, 1907.

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E. Y. MOORE. MECHANISM FOR LOOKING TROLLEYS.

APPLIUATION FILED AUG. 17, 1907.

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PATENTED FEB. 4, 1908 2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

EDWARD Y. MOORE, OF CLEVELAND, OHIO.

MECHANISM FOR LOCKING TROLLEYS.

Specification of Letters Patent.

Patented Feb. 4:, 1908.

Original application filed July 10. 1906 Serial No. 325.447. Divided and this application filed August 17. 1907. Serial No. 389.042.

T 0 all whom it may concern:

Be it known that I, EDWARD Y. MOORE, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Mechanism for Looking Trolleys, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to load-supporting trolleys adapted for movement along suitable trackways.

The object of the invention is to provide simple and effective means for locking such trolley to its track. The trolley may be simply a movable supporting device, or it may be associated with raising mechanism, constituting a hoist.

The invention comprises broadly a locking dog adapted to grip the trackway, and an operating rock shaft having a cam connection therewith.

The construction and operation of this look is hereinafter more fully described.

The drawings show my trolley lock combined with a suitable hoist, the characteristics of which are the subject matter of my application #325,447, of which this application is a division.

Figure 1 is a side elevation of a complete trolley hoist equipped. with my lock. Fig. 2 is a longitudinal vertical section through the trolley. Fig. 3 is a cross section through the trolley on the line 33 of Fig. 2 looking toward the right. Fig. at is a detail in horizontal section through the locking dogs, just above the rock shaft. As indicated by the line 4-4 of Fig. 3, Fig. 5 is a detail of horizontal section along the line of pivot shaft of the dogs, as indicated by line 55 of Fig. 3.

As shown in the drawings, the frame of the trolley comprises two corresponding castings, each having a side plate 10, horizontal of inwardly extending plates 11, and depending lugs 12 and 13. Through these lugs pass bolts 14 which secure the frame members together. Mounted in studs 15, carried by the plates 10, are the supporting wheels 16 which are arranged to ride on the lower flange of an I beam 17 On the outer sides of the plates 10 are bosses 20 from which project studs (not shown) on which are journaled the elevating wheels 22. These wheels are suitably geared with a driving shaft 23 (Fig. 2) extending crosswise of the frame beneath the I beam. This driving shaft carries a suitable hand chain wheel 25. Fig. 1 shows an elevating cable 26, depending from the two lifting wheels 22 and passing beneath sheaves 29 of a suitable grapple 27 and l thence upwardly across equalizing pulleys 28.

From the above description it will be apparent that there is provided a trolley adapted to travel on the lower flange of an I beam, this trolley in the embodiment shown carrying suitable hoisting mechanism. This hoisting mechanism is shown, described and claimed in my application referred to. Whether the hoisting mechanism be used or not, it is desired to be able to clamp the trolley at any point along the I beam. It is also desirable to have suitable handles at each end of the trolley by which it may be drawn along. My locking mechanism, which is the subject matter of this invention, provides such locks and handles. This mechanism will now be described:

Extending crosswise of the trolley beneath the Lbeam, and mounted in the side plates 10, is a suitable rod or shaft 30. On this shaft are journaled a pair of dogs 31 and 32. These dogs are provided near their upper ends with hardened steel plugs 34, which are adapted to bear against the under surface of the I-beam. A spring 35 surrounds the shaft 30 and gives the dogs a tendency to move so that their upper ends approach each other, thus causing the plugs to bite the I- beam. This biting becomes harder the more the hoist tends to move. The result is that the hoist is normally locked to the I beam against movement in either direction.

To release the dogs 31 and 32, I provide a shaft 40 which extends longitudinally beneath the I-beam, being mounted in the lugs 12 and 13. This shaft carries a pair of cams 41 and 42, which are adapted to bear against rollers 37 on the dogs 31 and. 32 respectively. Handles on the end of the shaft 40 form means for rocking it, and when so rocked the cams engage the rollers and. swing the dogs so that the plugs 34 pass away from and out of contact with the I-beam, allowing the hoist to be shifted, as desired.

A spring 45 surrounding the rock shaft 40 and secured to it at one end and the other end to one of the lugs 12, normally holds the rock shaft in idle position, thus allowing the spring 35 to cause the dogs to bite the I- beam. \Vhen either handle 44 is turned downwardly, against the action of the spring Wheels carried thereby,

45, the dogs release the I-beam, and the hoist may be shifted. These handles form also convenient means for shifting the hoist.

ley, a locking dog carried" thereby and adapt-v ed to engage the supporting track for the trolley, a rock shaft, and a cam connection between the rock shaft and dog.

' 2. The combination, with a trolley frame, of a rock shaft mounted therein, a locking dog, and a cam and roller connection between the rock shaft and dog whereby the rocking of the shaft may operate the dog.

3. The combination of a trolley-having supporting wheels adapted to travel on the lower flange of an I-beam and, a locking dog carried by the trolley and adapted to bite against the under side of the I-beam flange, and a cam adapted to move said dog.

4. The combination, with a frame having supporting wheels adapted to travel on the lower flange of an Ibeam, of a longitudinal rock shaft carried by such frame beneath the I-beam, a locking dog adapted to engage the under side of the I-beam, and a cam connection between said dog and rock shaft.

5. The combination of a trolley having a pair of side plates, supporting wheels carried on the inner side of saidside plates, a shaft connecting the side plates, a locking dog pivotally mounted on said shaft, and means for operating the dog.

6. The combination of a trolley, a clamping lock therefor, a spring tending to set said lock, and a movable cam operating mechanism mounted on the trolley and adapted to release said lock.

7. The combination of a trolley, a pair of locking dogs carried thereby, spring means tending to move said dogs into engagement with the trackway from opposite directions, and means for moving the dogs out of engagement.

8. The combination of a trolley adapted to ride on the lower flange of an I-beam, a pair of dogs pivotally mounted in the trolley frame below the I-beam, and adapted to engage the under side of said flange, a spring connected with said dogs.

9. The combination of a frame, supporting a pair of clamping dogs pivotally carried by the frame, a spring tending to move said dogs in one direction, a rock shaft carried by the frame, and a cam connection between said rock shaft and dogs operating to move the dogs in the releasing direction.

10. The combination, with a frame, of supporting wheels carrying the same, a rock shaft carried by said frame, a locking dog,

ing the dogs out of engagement with the flange.

12. The combination of a trolley adapted to ride upon the lower flange of an I-beam,

of a pair of dogs pivotally mounted in the trolley fi'ame and adapted to engage the I- beam from opposite directions, means tending to cause such engagement, a rock shaft, and a cam connection between the rock shaft and dogs, whereby the rocking of the shaft swings the dogs out of engagement.

13. The combination with a trolley frame, of supporting wheels carried thereby and adapted to ride on the lower flange of an I- beam, a pair of dogs mounted on said frame adapted to engage the underside of the I- beam, a spring adapted to swing said dogs toward the I-beam, a rock shaft mounted within the trolley fi'ame beneath the I-beam, and parallel therewith, an operative connection between the rock shaft and dogs, and

means for rocking the rock shaft.

14. The combination with a trolley frame, of supporting wheels carried thereby and adapted to ride on the lower flange of an I- beam, a cross shaft carried by the frame beneath such I-beam, a pair of dogs mounted on said shaft, and adapted to engage the underside of the I-beam from opposite directions, a rock shaft mounted in the trolley frame beneath the I-beam and parallel therewith, and a pair of cams on said rock shaft adapted to engage rollers on the two dogs respectively.

15. The combination of a frame, elevating mechanism carried thereby, supporting wheels carried by the frame and adapted to ride on the lower flange of an I-beam, a longitudinal rock shaft supported in the frame beneath the I-beam, handles on the opposite ends of said rock shaft, whereby it may be rocked from either end, and a locking mechanism adapted to engage said I-beam' and operated by said rock shaft.

16., ,The combination with a frame, of supporting wheels carried thereby and adapted to ride on the lower flange of an I-beam, a cross shaft carried by the frame beneath such I-beam, a pair of dogs mounted on said shaft adapted to engage the under side of the I-beam, a spring secured at its ends to said dogs and adapted to swing them toward the on the two dogs respectively, a spring tending to hold said rock shaft in idle position, and handles on opposite ends of the rock shaft for rocking it.

17. The combination of an Lbeam, a trolley adapted to travel thereon, means for normally locking the trolley against travel, and a handle supported by the trolley frame and adapted to release the locking means.

18. The combination of a trolley having supporting wheels, a longitudinal rock shaft, clamping means operatable thereby, and handles on the opposite ends of the rock shaft.

19. The combination of a trolley adapted to travel on the lower flange of an I-beam and having a frame extending beneath such I-beam, of clamping means carried by the trolley frame, a longitudinal rock-shaft carriedby the frame and means on said shaft it and serving also as a adapted to rock the frame may be drawn handle by which along its support.

20. The combination of a hoist adapted to travel, means for locking said hoist against travel, and means on each end of the hoist for operating the locking means.

21. The combination of a hoist adapted to travel a longitudinal rocking shaft carried by the hoist, rocking means near the opposite ends of said shaft, and means operated by said shaft for locking the hoist against travel.

In testimony whereof, I hereunto affix my signature in the presence of two witnesses.

EDW'ARD Y. MOORE.

\Vitnesses ALBERT II. Barns, I J. B. HULL.

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