Improvements in Hooking or Engaging and Disengaging Mechanism for Rock-cutting, Pile-driving, and analogous Apparatus.
Year: 1890

page_text: Date of Application, 8th N.v., 1890-Accented. 13th Dec
1000
COMPLETE SPECIFICATION.
Improvements in Hooking or Engaging and Disengaging Mechanism
for Rock-cutting, Pile-driving, and analogous Apparatus.
I, HENRY CHRISTIAN LOBNITZ, of the Slip Dock, Renfrew, in the County of
Renfrew, North Britain, Engineer, 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, that is to say :-
5 My said invention has for its object to provide an improved, effective, and reliable
device for hooking or engaging and disengaging the rams or strikers of rock-cutting,
pile-driving, and similar apparatus. My improved mechanism has been specially
designed for the rock-cutting apparatus described in my Patent Specification
No. 14016 of 1886, but it is also advantageously applicable in other apparatus.
My improved device is to be attached to the chain or chains by which each ram or
striker is raised in order to be dropped from a suitable height upon the tool or cutter
arranged to act directly on the rock, (or upon a pile in the case of pile-driving
apparatus). My device is shown on two accompanying sheets of explanatory draw-
ings, Figure, 1, on Sheet 1, being a plan and Figure, 2, a vertical section; whilst
Figures, 3, and 4, on Sheet, 2, are a horizontal section and a vertical section the latter
being as at right angles to Figure, 2. In these drawings the same reference letters
are used to mark the same or like parts wherever they are repeated.
A weight, A, has to be attached to the hoisting chain or chains for the purpose of
drawing it or them down after the striker has been let go; and according to my
invention this weight is made of a peculiar shape such as to facilitate and render
certain engaging and disengaging action. Externally the weight, A, is made approxi-
mately rectangular with rounded corners, but the external form is not material. The
weight, A, is made with a cavity at its lower part, this cavity having a wide bottom
mouth and inclined sides converging to an upper narrow part; and when the weight
descends the inclined sides of its bottom cavity cause it and the head, B, of the ram
or striker to assume proper and concentric positions relatively to each other. A deep
slot or groove, C, is formed across the top of the weight, A, and in this groove is
placed a lever-hook, D, E, F, centered on a pin, G, fixed across the slot, and passed
hrough the sides of the weight. The arm, D, of the lever-hook extends out hori-
ontally when the hooked part, E, is engaged with the strap or bridle, H, fixed to the
ead, B, of the ram or striker, and an eye, J, is formed at the end of the ram, D, for
he attachment of a rope by means of which the disengagement of the hook, E, is
ffected. The lever-book is made with a spur or tail, F, inclining downwards from
he hook part, E, and working in a deeper part, K, of the slot, C, in the weight, A,
nd its end encounters a part at the bottom of the slot, which thus acts as a stop to
mit the inward movement of the hook part, E, and tail, F. A spring, L, is applied
the arm, D, to tend to keep the lever hook in the closed position in which it is
own in Figure, 2; or sufficient weight or a counterweight might be applied to the
rt, E. When the weight, A, descends, the inclined inner side of the tail, F, of the
ver-hook encounters the strap or bridle, H, of the ram or striker, and the action of
strap in the incline-sided cavity of the weight, causes the tail, F, to be pressed
de and the top of the strap, H, to enter upon the hooked part, E. As soon as this
es place the spring, L, (or the counterweight), causes the fever-hook to close again
the engagement is thereby effected.
A shackle, M, is strung on the pin, G, for the attachment of the hoisting chain.
en a single hoisting chain is used it should descend from a pulley grooved in a
aner to prevent the chain from turning; or two hoisting chains or one or more
e ropes may be used; or the weight may be guided in any convenient manner so as
to turn when descending

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
Hooking or engaging and disengaging mechanism for rock-cutting, pile-driving
and analogous apparatus, such mechanism having in combination a lever-hook,
spring or counterweight to close the same, an inclined tail formed on the lever-hook
for opening it, and a weight to which the lever-hook is jointed and which is made
with an incline-sided cavity, the parts operating together in the manner and for the
purposes substantially as hereinbefore described.
Dated this Seventh day of November 1890.
EDMUND HUNT,
Applicant's Agent.