An Improved Pavement Ramming Machine
Year: 1895

page_text: Date of Application, 5th Oct., 1895-Accepted, 9th Nov., 1895
CUMI LEIE DI BULL
An Improved Pavement Ramming Machine
We, JOHANNES STUMPF, Merchant and CHRISTIAN LENZ, Locksmith, both
of Yorkstiasse 62 Berlim Germany, do hereby declare the nature of this invention
aud in what manner the same is to be performed to be particularly descubed
and ascertained in and by the following statement :-
The
This machine has been constructed for the purpose of avoiding the arduous and
lengthy manual labour now required for paving streets with hand rams
same may also be employed for ramming in macadam or the layer of buck.
concrete or the like requned under au asphalt or wooden pavement and this will
be done in a more complete manner than is possible with the implements used
until now.
In the accompanying drawing such a machine is represented in the first instance
for street paving by hand power, but the same pinciple may be embodied without
further difficulty to rollers driven by steain or animal power, when the amming
apparatus, will be litted in front of the roller to do the preliminary work.
In the drawings
Fig. 1 is a cross section, Fig 2 is a front view of the machine,
Fig. 3 shows the part of the apparatus which serves to move the whole of the
machine from one row of stones to the next.
The frame of the machine which bears the whole mechanism consists of the
horizontal and parallel beams A which bear each two vertical beams B connected
together in the dection of length by beams Cand in the cross direction by beams D.
Moreover the connection between the horizontal beams A and the vertical beams B
Is strengthened by cross pieces E, and between E and the vertical beams Bare
provided connecting pieces F which carry the bearings for the necessary cam-
shafte. The four horizontal beams G seive to guide the rammers and have at
their ends a platform H on which the workmen stand.
In the working of this machine a certain number of lammers fitted in two
parallel rows are lifted one after the other by a cam shaft, and drop back on to the
pavement whilst the above-mentioned propelling apparatus operates to transport
the whole machine one stone's width farther on, as soon as all the rammers have
been actuated once.
On the shaft a having bearing on post B, are fitted two fly wheels b with
cranks a', and a pinion c which gears into two toothed wheels d. These latter ate
fixed on the cam-shafts e having bearings on cross beam F which cam shafts have
each six lifting cams f.
The rammers y consist of two flat iron plates connected above, between which
the lifting cams move and which beat at then lower ends the ram blocks h.
The lifting canis between the beams Gabut whilst rotating around e against
the sliding piece between the non plates 9 This sliding piece is connected with
the upper connecting piece of the non plates by bolt and nuts /', thus if the
sliding piece 16 lifted, the whole 1ammer 16 lifted also, and falls down again as
soon as the lifting cam moves from under block 1. By turning the nuts A¹ on the
bolt the sliding piece may be shifted in an upward direction and the falling
distance of the 1am blocks may be lessened.
The am blocks have then rods to pass through sockets in the upper beam C,
then pressure on the stoves 18 made elastic by rubber buffers m bearing on beains C
and surrounding rods on which buffers the uuts n fall.

page_text: The apparatus serving to transport the whole of the machine forward consists of
an eccentue o fitted on one of the cam shafts e, the 1od o' of which eccentric is fixed
adjustable in the slot of lever p Same may be tuned loosely on shaft p' and
when moving in one duection gups with the dog 7 the friction drum fixed solidly
on shaft p'. On this same shaft is fitted the toothed wheels which is geared with
toothed wheels fixed firmly on the wheel axle t¹ which latter thus receives inter-
inittent motion from the eccentric o. Shaft beats with both ends in beam A
morcover it serves as support for the arm which bears the shaft p'. Fig. 3 shows
a separate view of the apparatus described above As the propelling motion only
takes place once during each complete tuin of the cam-shaft e and dining half of
the revolution of shaft e each ram block will have been actuated before the whole
machine advances. The distance for which the machine is moved aftor each turn
may be reduced by changing the position of rod o' m part p nearer to or fiunthor
from the shaft pl.
As has been mentioned before, this apparatus may also be fitted to a roller
worked by steam or hand power when of course the before described propelling
apparatus will not be required and the cam shaft will receive its motion from one
of the rotating parts of the engine, or with steam rollers, the cam-shaft may be
driven by a separate steam engine.
Having now particularly described and ascertained the nature of this said inven
tion and in what manner the same is to be performed we declare that what we
claim is :
1. A machine for ramming street pavement blocks or macadam or the substratum
of road paving consisting of a 1amming apparatus which is provided with a certain
Bumber of lammers fitted in one or more lows on a carage-like frame and actuated
by lifting came the cam shaft actuating at the same time a propelling apparatus
which will advance the frame after each operation of the set of rammers.
2. The connection of the machine descubed above with a roller duiven by steam
or animal power, the cam shaft receiving motion from one of the rotating parts of
the engine, or in the case of steam rollers from a separate steam engine.
3 The special form of construction of the machine described in Claim 1
consisting of a frame on wheels between which the rommers are guided below Hy
beams Gabove by rods passing through the beams C, the ammers being formed
of flat on bais being lifted by a lifting cam ffixed on shaft and actuated by
cranks, the falling distance of which blocks may be reduced by shifting in an
upward dnection between the bars y the sliding pieces by means of nuts k
substantially as described.
Dated thus 5th day of October 1895.
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C.,
Agents to Applicants.