US334740A - Hoisting-machine - Google Patents

Description

(No Model.)

F. X. BRENNER.

HOISTING MACHINE.

PatentedJan. 26,1886.

XIL-v enzdzoji N. PETERS, Phololflhngr apher, Washington 0. c.

NITE STATES AIENT Brion.

FRANCIS X. BRENNER, OF PHILADELPHIA, PENNSYLVANIA.

HOlSTlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 334,740, dated January 26,1886.

Application filed December 12, 1885. Serial No. 185,438. (No model) To all whom it may concern:

Be it known that I, FRANCIS X. BRENNER, of the city and county of Philadelphia, and State of Pennsylvania, have invented an Improvement in Hoisting-llIachines,of which the following is a specification.

My invention has reference to hoisting-machines; and it consists in certain improvements, all of which is fully set forth in the following specification, and shown in the accompanying drawings, which form part thereof.

In apatent granted to me November 24,1885, and numbered 330,956, is described a device more or less similar to the invention herein set forth as applied to an awning, the said device being used to raise or lower or wind or unwind the awning proper.

This invention is an improvement upon the apparatus there shown, and is especially designed as a hoisting-machine, though it is equally applicable for raising and lowering awnings.

In the drawings, Figure 1 is a side elevation of a hoisting-machine embodying my invention, with a portion of the frame broken away; and Fig. 2 is a sectional plan view of same on line x w.

A is the frame of the machine, and B is the main axle loosely journaled or secured therein.

0 is the lifting-drum, and may be made in any manner desired, either for a rope, a'flat web like an awning, or a chain. The frame 0 is provided with the ratchet-teeth D and the crown ratchet-teeth E.

F is a segmental chainwheel, and is provided with a counter-weight,'G, which causes the said segmental chain-wheel to be thrown to the upper part of the frame when the pull upon the chain L is removed, the movements of said chain-wheel being limited, preferably, to about a quarter of a revolution by the stops J J and the projection K from the frame A. It is self-evident that these stops may be made in any other manner desired, or attached to the counterweight.

H is a weighted pawl, pivoted at I to the counter-weight G or chain-wheel F, and is adapted to engage, by its point h, with the crown ratchet-teeth E on the drum 0.

Q is a projection, against which the edge of the pawl strikes when the chain Lis released, so that when the counter-weight G is below the shaft 13, and the pawl H is hanging vertically at the left-hand side of the shaft, thepoint h of the pawl will be forced out of contact with the teeth E by coming in contact with projection Q. Upon pulling upon the chainL the pawl H is raised clear of the projection Q, and it is so weighted that the point H immediately works into the teeth E, and a continuation of the movement causes the drum 0 to be moved around a quarter of a revolution. It is evident that a backward movement of the pawl will throw it out of contact with the teeth, and as its pivotal pin I is in substantially a vertical position there is no tendency for it to fly into contact with the teeth again, and its return movement is made so quickly that it would reach the projection Q and be retained out of contact before gravity would have time to overcome the inertia of the pawl, thus making its ratchet-connection a most smoothly-working piece of mechanism.

N is a weighted pawl, adapted to engage with the teeth D, to preventaback movement ofthe drum 0, and is pivoted to the arm a of the frame A, the lower end of which arm is provided with a slot and a cross-bar, R.

Hinged to the pawl N is a link, 0, havinga hook portion, P. By drawing down upon the link 0 and pulling it to the right the hookP will catch upon the crossbar R, removing the pawl,and allow the drum 0 to turn backward freely.

l/Vhen used as a hoisting-machine, a hook or ring is attached to a frame, A, at a.

M is the lifting-chain,which passes over the drum 0, which drum may be formed as shown in the solid or dotted lines.

It is evident that the chain-wheel F may be cylindrical, if desired, in place of the segmental shape shown, but such a construction is hardly necessary. In this construction all complication due to springs is entirely overcome, less wear upon the parts results, the construction is cheapened, and the durability increased.

While I prefer the construction shown, I do not limit myself to the details thereof, as they may be modified in various ways without departing from my invention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of a lifting or winding drum or roller having ratchet-tceth,a Weighted chain-wheel adapted to be oscillated,aweighted pawl carried by said chain-wheel and arranged to engage withsaid ratchet-teeth, and a chain or cord to operate said chain-wheel against the action of its weight, substantially as and for the purpose specified.

2. The combination of a lifting or winding drum or roller having ratchet-teeth,aweighted chain-wheel adapted to be oscillated,a weighted pawl carried by said chain-wheel and arranged to engage with said ratchet-teeth, a projection to throw said pawl out of contact with said teeth, and a chain or cord to operate said chain wheel against the action of its weight, substantially as and for the purpose specified.

3. The combination of a lifting or winding drum or roller having ratchet-teeth,a weighted chain-wheel adapted to be oscillated,aweighted pawl carried by said chain-wheel and arranged to engage with said ratchet-teeth, a projection to throw said pawl out of contact with said teeth, suitable stops to limit the throw of said chain-wheel, and a chain or cord .to operate said chain-wheel against the action .of its weight, substantially as and for the purpose specified.

4. The combination ofa lifting or winding drum or roller having ratchet-teeth,a weighted chain-wheel adapted to be oscillated,a weighted pawl carried by said chain-wheel and arranged to engage with said ratchet-teeth, the said weighted pawl being carried through a quadrant of a circle by the chain-wheel,whereby its axis of movement is changed from a horizontal to avertical position, and a chain or cord to operate said chain-wheel against the action of its weight, substantially as and for the purpose specified.

5. The combination of a lifting or winding drum or roller having ratchet-teeth, a weighted chain-wheel adapted to be oscillated,a weighted pawl carried by said chain-wheel and arranged to engage with said ratchet-teeth, a projection to throw said pawl out of contact with. said teeth, suitable stops to limit the throw of said chainwhcel, and a pawl-andratchet device to prevent a backward movement of the winding drum or roller, and a chain or cord to operate said chain wheel against the action of its weight, substantially as and for the purpose specified.

6. The shaft Band frame A, in combination with winding-arm 0, having ratchet-teeth D and E, chain-wheel F, having weight G, weighted pawl H, pivoted to said chain-wheel and adapted to engage with the ratchet-teeth E, pawl N, adapted to engage with ratchetteeth D, and chain L, to operate the chainwheel, substantially as and for the purpose specified.

7. The shaft B and frame A, having projection K, in combination with winding-drum G, having ratchetteeth D and E, chain-wheel F, having weight G and stops L, weighted pawl H, pivoted to said chain wheel and adapted to engage with ratchet-teeth E, pawl N, adapted to engage with the ratchet-teeth D, and chain L, to operate the chain-wheel, substantially as and for the purpose specified.

8. The shaft B and frame A, having cat'clrbar It, in combination with winding-arm 0, having ratchet-teeth D and E, chain-wheel F, having weight G, weighted pawl H, pivoted to said chain-wheel and adapted to engage with the ratchetteeth E, pawl N, adapted to engage with ratchet-teeth'D, link 0, having catch or hook P, and chain L, to operate the chainwheel, substantially as and for the purpose specified.

In testimony of whichinvention I hereunto set my hand.

FRANCIS X. BRENNER.

\Vitnesses:

R. M. HUNTER, Rronn. J. 01111.1), Jr.

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