Snatch-blocks.
Year: 1888

page_text: Date of Application (in United Kingdom), 9th Nov., 1888
Complete Specification Left, 9th Nov., 1888-Accepted, 15th June, 1889
COMPLETE SPECIFICATION.
Snatch-blocks.
I, HENRY VON HARTZ, of No. 38 Maple Street, in the City of Cleveland, State
of Ohio, United States of America, Manufacturer, 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 :-
The object of the invention is to simplify the construction of snatch-blocks; and
my improvement consists in peculiar features of construction hereinafter described
and pointed out in the claims.
In order that my invention may be fully understood, I will proceed to describe
it with reference to the accompanying drawings, in which Fig. 1 is an edge view of
my improved snatch-block. Fig. 2 is a front view, the link being lowered. Fig. 3
is a vertical section, the link being raised. Fig. 4 is a rear view of a hook-strap.
Fig. 5 is a side view of the same. Fig. 6 is a top view thereof.
The shell or frame of the snatch-block is made of metal or wood, with a front check-
plate 1, a rear cheek-plate 2, and a bottom plate 3. The front check-plate is of
less height than the rear cheek-plate, so as to leave an opening 4, for the insertion
of the rope 5.
6 is a centre-pin secured in holes 7, in the cheek-plates and carrying the pulley
or sheave 8. Between the pulley and front cheek-plate is secured to the latter by
bolts 10, a link-strap 11, formed with a hole 12, at its lower end, (through which the
centre pin passes), and with an eye 13, at its upper end, providing means by which
a link 14, (of any suitable form) is hinged thereto. The rear cheek-plate is provided
with a bracket or yoke 15, for guiding a hook-strap 16, in its vertical movement.
This book-strap supports all the parts above described on a swivel or tight suspension
hook 17. The hook-strap 16, is a bent bar of metal having a vertical part 18, and
a horizontal part 19. The vertical part 18 slides in the yoke or bracket, and is formed
with a slot 20, at its lower end, through which the centre-pin passes and permits this
part slight vertical play. The horizontal part 19, is formed with an eye 21, to
which the suspension-hook is secured in the usual manner, a depression or recess 22,
forming a seat for the outer end of the link, and a hook 23, at the front end for
retaining the link when the block is in use.
When it is desired to insert the bight of the rope or to remove it, the whole
frame, including the centre-pin, the sheave, and the link-strap, is held firm, while the
hook-strap is pushed toward the lower portion, so that the centre-pin passes to the
top of the slot in the vertical part. Thus the distance between the horizontal part
and the hook of the link-strap is shortened, so that the link can be separated and
lowered, as shown in Fig. 2.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is:
1. A snatch-block constructed with a hook-strap having a vertical part formed

page_text: with a slot in its lower end and a horizontal part formed with a swivel eye, a hook at
the outer end, and a link-depression, substantially as set forth.
.
2. A snatch-block having a hook-strap adapted to slide, formed with a slot for the
centre-pin, and a link, substantially as set forth.
3. A snatch-block having a hook-strap adapted to slide, a link, and a bracket for
guiding and retaining the strap on the rear cheek-plate, substantially as set forth.
4. A snatch-block, comprising a frame having front and rear cheek-plates, and a
bottom plate, the hook-strap having centre-pin and slot connection with the rear
check-plate, a link, and the link-strap secured to the front cheek-plate, substantially
as set forth.
5. The combination of the shell or frame having a bracket or pulley or 'sheave
having a centre-pin, a link, the hook-strap having a slot for the centre-pin, and the
link-strap, substantially as set forth.
Dated this 8th day of Ontalia 1980
HENRY V. HARTZ.