An Improved Power-gearing for Hoisting Machines.
Year: 1893

page_text: Date of Application, 24th Nov., 1893-Accepted, 11th Aug., 1894
COMPLETE SPECIFICATION.
An Improved Power-gearing for Hoisting Machines.
I, FRITZ STRECKENBACH, of 2"), Stollendorfstrasse, Berlin, in the German
Empire, Builder, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This improved power-gearing for hoisting machines consists of a crank motion
operated by hand which accumulates in a fly wheel, such an amount of power,
that when suddenly throwing in gear carrier pinions mounted upon a lever
considerable heavy loads can be hoisted by one man.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a longitudinal elevation, Fig. 2 an end view, and Fig. 3 a plan of
the said gearing.
In carrying out my invention a is a lever arranged to be oscillated upon the
stud b, the lower end of which lever a is jointed to the small connecting arm c,
which engages the stud c¹ upon the toothed wheel d. The toothed wheel d is
mounted upon the stud d' and is in gear with the pinion e secured upon the shaft f,
which latter is mounted in the fixed frame f' and carries also the fly wheel g.
If the lever a is oscillated upon the stud 6 the toothed wheel d rotates the
pinion e and its shaft and fly wheel g, thereby accumulating in the latter a large
amount of live power. The power thus accumulated can at any desired moment
be transmitted to the rope drum k by means of a lever i and carrier wheels upon it,
which are adapted to cause the drum to turn either to the left or right and
respectively raise or lower the load whilst the attendant continues to impart fresh
power by oscillating the lever a. The lever i has two arms i & 2 and is secured
upon a spindle ³, the arm i carrying a carrier pinion l, which, when raised gears
with the pinion el secured upon the fly wheel shaft and with the toothed wheel m
upon the countershaft m¹ from which rotary motion to the left, is imparted to the
rope drum k. The lever arm carries two carrier pinions n³ & n³ in gear with
each other and in the lower position respectively with the toothed wheel m and
pinione whereby motion is transmitted to the rope drum k in a reverse sense.
The carrier pinion lever i is actuated by means of the rod o jointed to the knee
lever o¹ which is fulcrumed to the stud o' and retained in position by means of a
bolt p furnished with a handle p' and pressed into recesses 9, 93, 9', formed in a
plate p by means of a spring p. In the middle position q* all the carrier pinions
are out of gear with the toothed wheel m in the lowest position q' the rope drum
turns to the left and in the highest position 9 to the right.
In order to retain the rope drum k in any desired position when out of gear a
ratchet wheel r is secured upon the axis of the drum k in connection with a pawl l
upon a stud employed under the influence of a weight r³, or spring, which causes
the pawl to enter the ratchet wheel r. The pawl is lifted and retained out of
gear with the ratchet wheel reach time the carrier pinions arrive in their working
position, by means of the two armed lever secured upon the spindle ³, acting upon
a swivel s interposed between the levers and the back end of the pawl r¹, the
swivel depressing the latter. If it is desired to turn the drum k to the left the
lever arm' turns the levers to the left which moves the pawl r to the right, thus
lifting it out of gear. If the rope drum k is to turn to the right the lever arm *
turns the levers to the right and thus lifts the pawl also out of gear.
8
The power-gearing described is specially applicable for hoisting loads in

page_text: buildings, for which purpose it is erected in the cellar, the lever a, spring bolt
and its handle projecting through the respective beams, that is above the ground
floor. On this floor is a workman who oscillates the lever a with his right hand
and with his left sets the pawl p as may be required.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim, is-
"In a power-gearing for hoisting machines."
1st. A crank motion actuated by hand adapted to accumulate in a fly wheel a
certain amount of rotary power, which is transmitted to a rope drum, by means of
carrier pinions employed upon a double armed lever i rendered movable on its
fulcrum, one arm of which lever carrys one pinion and the other two pinions,
substantially as and for the purpose set forth.
2nd. In a power-gearing as specified in the preceding claim, retaining the rope
drum in position, by means of a ratchet wheel r which is released each time the
rope drum is to be rotated by means of a levers and suitable intermediate
connections, substantially as and for the purpose set forth.
Dated this 23rd day of November 1893.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.