Improvements in and relating to Dogs for Carpenters' and other Work Benches.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Dogs for Carpenters' and other
Work Benches.
I, LUIGI D'AURIA, a citizen of the United States, residing at No. 248 West
Logan Square, in the City and County of Philadelphia, and State of Pennsyl-
vania, one of the United States of America, Consulting 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 :---
My invention relates to bench dogs, and it consists in the peculiar construction
and operation of the dog and in the combination of parts, as will be more fully
described hereinafter, and as shown in the accompanying drawings, in which―
Figure 1 is a perspective view of a bench dog embodying my invention.
Figure 2 is an axial cross-section thereof.
Figures 3 and 4 are like views showing slight modifications, and
Figure 5 is a face view illustrating the operation of the dog.
My invention has for its object a construction of bench dog for the use of
carpenters, cabinet makers, etc., that is readily adjustable to the thickness of the
work to be held thereby, and that is simple of construction and not liable to break
or get out of repair.
In the drawings above described, D, indicates the dog, which consists of a
cylinder that has on one or both faces a peripheral biting or holding edge or
teeth, d, said cylinder revolving eccentrically upon a pin or spindle, S, that has its
bearings in a frame, F', adapted to be secured to the work bench by means of screws
in such manner that its upper face will be flush with the like face of the bench.
Inasmuch as the dog, D, revolves, eccentrically around its pin or spindle, it can be
made to project more or less above the upper face of the work bench to suit
requirements; said dog being so arranged on its support as that when in its lower
position the periphery of said dog will be flush with or lie slightly below the upper
face of the work bench, as shown in Figure 5 in full lines.
Any suitable means may be provided to hold the dog in the position to which it
may be adjusted. This may be effected by friction, produced by an ordinary set-
screw, s, located in the dog, D, and having a bearing upon the pin or spindle, S,
and if desired a piece of rubber, leather, or other suitable material, s', may be
interposed between said set-screw and the spindle, as shown in Figure 2.
The same
result may be attained by means of a forked spring, S¹, secured to the face of the
dog so as to straddle its pin or spindle, the free ends of said spring having bearing
upon a washer, W, so as to jam the dog laterally against the frame, C. Instead of
the frictional devices above referred to for locking the dog into any position to
which it may be adjusted, this may be done by means of a nut, N, working on a
threaded portion of the pin or spindle, S, as shown in Figure 4. In the latter case
the dog can be pressed against the work when the other end thereof is held fast to
the bench, the dog performing the function of a tail screw.
I have hereinabove referred to and described a bench dog consisting essentially
of a discoidal dog revolving eccentrically on or in its bearings, but it is obvious
that similar results may be obtained with other forms, such as ellipsoidal, ovoidal,
or angular, and that in the case of the cylindrical or other form of dog, instead of
mounting the same cn a pin or spindle, it may be provided with trunnions or
journals, revolving in journal bearings. I wish it understood, therefore, that I do
not limit myself to any particular form of dog, nor to any particular construction
of bearings for the same, nor to any particular means for securing the dog in its
adjusted position, as these may be varied in many ways without departing from the

page_text: nature or spirit of my invention. which consists essentially in a dog of any suitable
form adapted to revolve in such a manner as that its operative face may be pro-
jected to a greater or less extent above the face of the work bench, or be brought
flush therewith, or dropped slightly below the same.
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 :-
:―
1. In a bench dog, the use of a dog of any suitable form adapted to revolve in
such manner that it may be projected to a greater or less extent above the face
of the work bench or brought flush therewith, or dropped slightly below said
face.
2. A bench dog comprising a cylinder having biting edges or teeth and adapted
to revolve eccentrically on or in bearings, in combination with a suitable support
adapted to be secured to the work bench.
3. A bench dog comprising a cylinder having formed on one or both faces a
peripheral biting or holding edge or teeth, suitable bearings on or in which said
dog is adapted to revolve eccentrically and on or in which it is adapted to be held
in any desired position by friction or otherwise, in combination with a suitable
support adapted to be secured to the work bench.
4. A bench dog consisting of a cylinder provided on one or both faces with a
biting or holding edge, or teeth, a spindle upon which said dog is adapted to
revolve eccentrically, said spindle being screw-threaded at one end, a support
provided with bearings for said spindle and adapted to be secured to the work
bench, and a locking nut fitted upon the screw-threaded portion of the spindle to
lock the dog into any desired position thereon, as set forth.
Dated this 10th day of May 1901
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.