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Патент USA US3062070

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Nov. 6, 1962
Filed Aug. 3, 1959
3 Sheets-Sheet l
Nov. 6, 1962
Filed Aug. 3. 1959
F/G. 3.
3 Sheets-Sheet 2
Nov. 6, 1962
Filed Aug. 3, 1959
3 Sheets-Sheet 3
F/G. 9.
2707 Jo” "6’ 40
I 46’
42 34
United States Fatent @?ice
Patented Nov. 6, 1962
element into the notch and moves said one adjustable
member towards the time actuated member leaving the
other adjustable member in its set position and bringing
the slots out of register so that a peripheral portion of
said one adjustable member extends across the slot in
the other adjustable member whereafter the movement of
Torn Bowen, Hove, England, assignor, by mesne assign
ments, to §. Smith & Sons (England) Ltd, London, Eng
land, a corporation of England
Filed Aug. 3, 1959, Ser. No. 831,247
Claims priority, application Great Britain Aug. 7, 1958
5 Claims. (Cl. 74—54)
the time actuated member ?rst moves the element out of
the notch when it is moved by the spring means radially
on to a peripheral portion of said other adjustable member
and then after a lapse of time moves it opposite the slot
in said other adjustable member when said spring means
The invention concerns time controlled actuating mech
anisms for use in standard home appliances and similar
equipments used in industry such as lights, welders, ovens,
washers, dryers or any device which operates in cycles
which may be recurrent or which may vary from run
move it radially on to the peripheral portion of said one
adjustable member which two radial movements actuate
said control device.
The aforesaid adjustable members may be cut away at
their centres to provide internal peripheral portions from
which said radial slots extend outwardly and wherein said
spring means are arranged to urge the element outwardly.
The means for withdrawing the element inwardly from
20 the ends of the slot comprise a rack to which the element
to run.
This invention relates to adjustable time controlled
starting and stopping devices and has for an object to
provide an arrangement in which the starting and stopping
times can be adjusted by means of a single control mem
The invention is particularly applicable to starting and
is ?xed and is mounted on a rotatable carrier so as to
Stopping a cooker by operating a suitable switch (in the
have a limited reciprocal movement therein which rack has
a set of teeth engaging a pinion mounted on the carrier
so as to rotate about the latter axis of rotation and which
a gas cooker), so that the cooker is rendered operative at
a predetermined time, maintained operative over a pre 25 pinion is arranged to be rotated by the setting member
case of an electric cooker) or a gas valve (in the case of
determined period and rendered inoperative after that
According to this invention an adjustable time con
trolled starting and stopping device comprises two tracks
upon said reversal of its movement whereby the rack and
the element are withdrawn against the action of said
spring means until the rack comes to one limit of its
reciprocable movement whereupon the carrier rotates
arranged side by side and relatively adjustable along their 30 moving the element circumferentially into said notch and
setting said one adjustable member for the starting time.
length, an element arranged opposite both tracks, and
The said rack may be provided with a second set of
movable along them by a time actuated member resulting
teeth which engage a second pinion ?xed to a spindle ro
in movements being imparted to the follower in a direc
tatably mounted on the carrier so that its axis is at
tion transverse to its movement along the track, one
transverse movement being under the control of one track 35 right angles to and intersects that of the carrier which
and the other transverse movement being controlled by
spindle has ?xed thereto a cam engaging an operating
the other track, which two transverse movements of the
member for said control device so that axis of rotation
follower are arranged to actuate a control device to ini
tiate respectively a starting control and a stopping con
of the carrier passes through the peripheral face of the
cam and its area of contact with the operating member.
trol, a setting member movable in the direction of the 40
The following is a description of one embodiment of
length of the tracks and arranged in one direction of move
the invention reference being made to the accompanying
ment to impart setting movement to one of the tracks
and in the other direction to impart setting movement to
diagrammatic drawings in which:
the other track, and also during one of said movements to
below the line 1—1 of FIGURE 2 but showing certain
parts in different positions and showing the element 23
in its outermost radial position;
impart movement to said follower so as to position it at
the starting end of the tracks, and which time actuated
member is arranged to move said follower from said start
ing end to the other end of the two tracks.
FIGURE 1 is a plan view of a part of the apparatus
FIGURE 2 is a section on the line 2—-2 of FIGURE 1
looking in the direction of the arrows with some parts
shown for clarity on an enlarged scale to that of FIG~
The said adjustable tracks are preferably on rotatably
adjustable adjustable members and said element is mount 50 URE 1;
ed so as to be movable both radially and circumferential~
FIGURE 3 is an enlarged View of the actuating cam;
ly with respect thereto, which rotational adjustments are
FIGURE 4 is a plan view of the two setting tracks on
effected by the setting member relatively to the time ac
an enlarged scale from that shown in FIGURE 2 and
tuated member and which radial movement actuates said
showing ‘the tracks in certain of the relative positions
control device for starting and stopping.
55 they assume;
The aforesaid setting member may be rotatable in one
FIGURE 5 is a similar view to FIGURE 4 showing
direction away from the time actuated member so as to
the tracks in another relative position;
engage an abutment on one of said adjustable members so
FIGURE 6 shows the position of the setting arm and
as to bring a radial slot therein into register with a radial
the parts which it engages shortly after it has been moved
slot in the other adjustable members and wherein said
element is movable under the action of spring means to
wards the ends of said slots so that continued movement
of the setting member in said one direction moves the
two adjustable members and element away from the
time actuated member whereas reversal of the movement
from the initial position in a direction to set the ?nish
FIGURE 7 is a face view of the start track;
FIGURE 8 is a face view of the ?nish track; and
FIGURE 9 is a diagrammatic view showing how the
of the setting member withdraws it from the abutment 65 start and ?nish tracks are connected to indicating pointers.
leaving the adjustable members stationary which setting
The device comprises a carrier 10 mounted for rotation
member during this withdrawal actuates means for with
about a ?rst axis 11 which carrier carries a slide 12
drawing the element away from the ends of the slots but
mounted in a guide 13 formed on the carrier, for move
leaves it opposite a notch in a continuation of a face of the
ment in a direction parallel to a radius extending from the
slot in said one adjustable member and which means
?rst axis and loaded by means of a pair of helical springs
on continued reversal of the setting member brings the
14 towards one end of the guide. The slide 12 is L-shape
in cross section, both longitudinal edges of which are pro
vided with teeth. The teeth 15 along one edge engage
with a ?rst pinion 16 journalled in the carrier 10 for ro
tation about the ?rst axis. The teeth 33 along the other
edge engage with a second pinion 17 solidly mounted on
the spindle 18 in the carrier 10 for rotation about a
second axis 37 at right angles to the ?rst axis #11 which
it intersects. The spindle 13 also carries an actuating cam
6) on one edge which can engage the projection 26 on
the starting track 25.
A time controlled actuating member 35 driven by suit
able clockwork 32 rotates about the ?rst axis and is pro
vided with an arm 31 which in certain circumstances re
ferred to later is engageable only with the blade-like
element 23, causing it to sweep along the aforesaid sur'
faces 4 and 1.
19 which parts are so arranged that the point of contact
As shown in FIGURE 9 the ?nish and start tracks
of the cam With a cam follower 20 lies on or near the
10 24 and 25 may be gear connected to pointers 37, 38 which
axis 11.
As will be seen from FIGURE 3 the periphery of the
traverse a time scale 39 and ?xed plate 40‘ secured to
the member 34. ‘For this purpose the rims of the tracks
may be toothed as may also the members 30 (not shown
in FIGURE 9). The toothed rim of the start track 24
actuating cam is in the general form of a square with
slightly concave sides.
The cam follower comprises a
non-rotating switch operating arm 24) of strip-like form
engages a pinion 41 on a hollow spindle 42 which ex
which may be engaged by the corners of the cam 19, the
along the strip and open when the mid-points of a concave
tends through a hole in the member 34 and has another
pinion 43 which engages a gear wheel 44 encircling the
setting spindle 27. The gear wheel has a hub 45 to
side is opposite the strip. It will be appreciated that ro
‘which the pointer 37 is attached. The toothed periphery
switch being closed when a corner engages and moves
tation of the carrier 10 with the actuating cam 19 ?xed
against rotation about its axis does not affect the condi
tion of the switch operating arm 26.
An arm 21 is ?xed to the ?rst pinion I6 and is provided
with an upward projection 22. An element 23 of blade
of the ?nish track 25 engages a pinion 46 on a spindle
47 which extends through the hollow spindle 42. The
spindle 42 has a further pinion 48 ?xed to it which
engages a gear wheel 49 having a hub 59 to which the
pointer 32% is attached.
The manner of operation is as follows. Referring to
like form lies substantially in a plane passing through
FIGURE 6 when the setting arm ‘29 is in a Zero position
the ?rst axis with its operative face parallel with that
its right-hand edge will be close to but spaced from the
axis and is rigidly ?xed to the slide I2 and co-operates
projection 22 on the arm 21 ?xed to the ?rst pinion
with tracks 24 and 25. The spring loading on the slide
16, the projection 26 on the start track 25 will be in the
urges the element radially outwards from the ?rst axis 11.
The tracks 24, 25 comprise discs having cut away 30 cut-away portion 36 of the setting arm and the radially
movable element 23 will be to one side of the projection
centre portions to provide track faces and can be rotated
26 and on the left-hand side of the setting arm 29 (and
not in the position shown in FIGURE 6). Prior to the
gaging their circular peripheries and mounted on a ?xed
resetting of the tracks the track 24 and start track 25
part 34 of the apparatus so that the tracks do not rotate 35 will be in some such position shown in FIGURE 5, the
about the ?rst axis 11 for setting purposes, but are fric
tionally restrained against rotation by members 30 en
in unwanted fashion.
The cams shown in FIGURES 2, 4 and 5 comprise a
start track 25 and a ?nish track 24. The internal periph
eral face of the ?nish cam 24 (see FIGURE 7) has two
element 23 (shown in full line) is resting on the part 6
of the start track 25 and the switch is open. To set the
?nishing time the setting arm 29 is rotated anti-clockwise
picking up the downward projection 26 on the start track
internal circular faces of different radii, the face 1 of 40 25 and then moving clear of the blade-like element 23
smaller radius extending through nearly 360° and the
(which is at an intermediate part of its radial travel),
face 2 of larger radius extending through a small angle
which parts are rotated in relation to the ?nish track
completing the 360°. The ends of the two faces are
24 until the two tracks assume the relative positions
shown in FIGURE 4. In these positions the blade-like
joined by radial sides 3, 3a. The internal surface of the
element 23 will have moved radially outwards under the
start track 25 (see FIGURE 8) has four internal cir
action of the springs 14 and is disposed in the two regis
cular faces of different radii, a short circular face 4 of
tering slots in the two tracks and is spring-pressed into
intermediate radius, a circular face 5 of circumferential
extent and radius corresponding to the face 2 of the
engagement with the end faces 2 and 5 and is beyond
?nish track 24, a circular face 6 which lies mid-way be
the end of the setting arm 29 as in FIGURE 6. In mov
tween the circular faces 1 and 2 of the ?nish track 24 and
ing outwards the rack, on which the element 23 is
the circular extent of which face 6 is about 180° and
mounted, will have rotated the pinion 17 and cam 19
and the switch is closed. The rack will also have rotated
a further circular face 7 (Whose form and radius are in
the pinion 16 bringing projection 22 closer to arm 29.
fact immaterial). The various circular faces thus lie on
circumferences of four circles of successively increasing
Rotation anti-clockwise of the setting arm 29 is con
radii such that when the follower 23 engages the face 4
tinued which carries both tracks around with it and also
the element 23 which is now engaged by the face 6a on
the switch is off, i.e. its contacts are open and under these
conditions the concave part 8 of the cam 19 is opposite
the start track 25 until the radial portion 3a of the ?nish
the switch operating arm 29. When the element 23 en
track 24 is in a position corresponding to the pre-selected
desired ?nish time i.e. is the required angular distance
gages the circular face 1 the switch is also on, i.e. the
from the arm 31 on clock pinion 35 which rotates anti
contacts are closed, this corresponds to the condition
clockwise. The setting arm 29 is then rotated clockwise
when the switch operating arm 26 is engaged by a corner
leaving the blade-like element 23 in the slots in the two
9 of the cam 19 shown in FIGURE 3. When the ele
tracks. During this movement the setting arm 29 ?rst
ment 23 engages the face 6 the switch is off i.e. the con
picks up the projection 22 on the arm 21 ?xed to the
tacts open and this takes place when the side 10a in
?rst said pinion 16, rotating the pinion which thus causes
FIGURE 3 is opposite the switch operating arm 20.
the slide 12 to move radially inwards carrying with it
Finally when the element 23 is in contact with face 2 the
element 23 which is withdrawn from the registering slots
switch is on, i.e. the contacts are closed and this corre
the two tracks 24 and 25, when the slide 12 reaches
sponds to a position when the corner 11a of the cam 19
the limit of its travel in the carrier the ?rst pinion 16
is in engagement with the switch operating arm 20.
thus becomes locked against further rotation relative to
The start track 25 is provided with a projection 26 seen
the carrier and the carrier rotates clockwise and under
in FIGURE 2 and FIGURE 6. A setting spindle 27
these conditions the element 23 is drawn a short radial
lies along the ?rst axis 11 and can be rotated by a knob
distance clear of the face 4 on the start track 25 and
28, the setting spindle carries a radially extending setting
lies opposite the radial face 4a. Thus further rotation
arm 29 provided with a cut-away portion 36 (FIGURE
of the setting knob 28 in a clockwise direction will bring
the face 4a on the start track to the required angular
of knob 28 to set both tracks 24, 25 and cam 19.
distance from the arm 31 on the clock pinion 35.
setting of cam 19 enables it to actuate arm 20 in one sense
and subsequently to actuate the arm 20' in another sense
ing the inward retracting movement of the blade-like
element 23 and of the slide 12 and of the rack 33, pinion
16 and actuating cam 19 will have been rotated so that
the switch will have opened and remains open when the
element 23 reaches the face 4a. When the element is
in its fully retracted position there requires to be still
at least 180° separating the stop 22 on the arm 21 on
the ?rst pinion 16 from the element ‘23 in order to allow
a full six hours cooking period. Just prior to the com
mencement of the cooking period the arm 31 ?xed to
the clock actuated member 35 which is rotating in an
anti-clockwise direction engages the blade-like element
as explained above.
If resetting is carried out while a timing operation is
in progress, the element will be in the notch 4a in FIG
URE 5, if the cooker has not yet been switched on, or at
the dotted position if it is on. The ?rst effect of anti
clockwise rotation of the setting arm will then be to en
10 gage the element, and push this along until it attains full
line position. Thereafter the setting will proceed as in
1 to 5 above.
While there have been described above what are pres
ently believed to be the preferred forms of the invention,
23 and causes the element to move in an anti-clockwise 15 variations thereof will be obvious to those skilled in the
art and all such changes and variations which fall with
direction off the face 4 of the start track on to the face
1 of the ?nish track 24 as shown in chain lines in FIG
URE 5 and the switch will be closed due to the rotation
of the cam 19 by pinion 17, rack 12 and pinion 16. The
element 23 continues to be moved counterclockwise by
the arm 31 along the face 1 and at the expiry of the
required cooking time, the element 23 will be moved by
in the spirit of the invention are intended to be covered
by the generic terms in the appended claims, which are
variably worded to that end.
I claim:
1. A time controlled actuating mechanism comprising
?rst and second settable tracks having shaped parts, an
element movable along the tracks, a clock driven mem
ber adapted to move said element along the tracks, re
FIGURE 5 so as to be resting on the face 6 of the start 25 versibly movable means operatively connected to said ele
ment and operated by the movement of said element when
track 25 (as shown in full lines in FIGURE 5) and in
it reaches said shaped parts of the tracks, a single man
this position the switch is off.
ually controlled setting member adapted both to set the
The sequence of operations in resetting the tracks is as
?rst and second tracks so that said shaped parts are at
set out as follows:
(1) At the cessation of a timing operation and prior 30 a preselected distance from the clock driven member and
also to set the reversibly movable means, whereby when
to resetting of tracks, the positions of the tracks are as
the clock driven member moves said element opposite
shown in FIGURE 5 and the element 23 as indicated by
a shaped part of one track, the reversibly movable means
the full line on that ?gure.
is operated, and when the clock driven member moves
(2) To reset the mechanism, the setting arm 29 is
rotated anti-clockwise, picking up the arm 26 on the start 35 the element opposite a shaped part of the other track
the arm 31 off the end of face 1 to a position between
the faces 3, 3a and will be spring-pressed upwardly in
track 25, and driving start track anti-clockwise in rela
tion to ?nish track 24 (which remains stationary) until
the tracks reach relative positions shown in FIGURE 4
whereupon the element 23 comes into engagement with
the reversibly movable means is again operated.
24 being engaged by the element 23.
(4) When the desired ?nish time is indicated, the set
along said tracks, said element being movable both along
2. A time controlled actuating mechanism as claimed
in claim 1 in which spring means are arranged to operate
upon said element in a direction to impart movement to
face 2 of the ?nish track 24 and with face 5 on the start 40 said reversibly movable means and means for loading
said spring means by the setting movement applied to said
track 25, i.e. as far “out” as the element 23 can travel
?rst and second tracks.
and bringing the upward projection 22 on the pinion 16
3. A time controlled actuating mechanism as claimed
into engagement with the right-hand side of the arm 29.
in claim 1 wherein said shaped parts comprise ?rst and
(3) Finish time is set by continued anti-clockwise rota
tion of setting arm 29. This results in rotation of both 45 second slot-s respectively formed in and extending trans
versely to said ?rst and second tracks and a notch formed
tracks 24, 25 and the element 23 together, the element
in a continuation of one of the walls of said ?rst slot,
being engaged by radial face 6a on the start track 25
said clock driven member being movable in a direction
and the “anti-clockwise” face of slot 3 on the ?nish track
ting arm 29 is rotated clockwise to set the start time.
said tracks and transversely thereto, spring means oper
atively connected to said element and arranged to effect
said transverse movement, said element being engageable
This clockwise rotation results in the engagement of the
setting arm 29 with upward projection 22 on the ?rst
by the clock driven member so as to bring the element
pinion thereby rotating the pinion and causing retraction
beyond said notch whereupon it is moved transversely
of the slide 12 to the maximum extent and bringing the 55 to said ?rst track by said spring means onto said second
track whereafter continued movement of the clock driven
element 23 well clear of slot 3, continued clockwise rota
member moves the element opposite the second slot where
tion of the arm 29 rotates the slide pinion and carrier and
element 23 solidly and the side of the element 23 engages
upon said spring means moves the element transversely
with face 4a on the start track 25 a.ter a relatively small
into the second slot, said reversibly movable means being
further clockwise rotation. Thereafter the continued 60 adapted to be actuated by the successive transverse move
clockwise rotation of the setting arm 29 results in the
ments of the element, said single setting member being
clockwise rotation of the start track, the ?nish track 24
movable in one direction to engage a part of one of the
remaining stationary, until the required starting time indi
tracks to move it into a position in which the ?rst and
cation is obtained.
second slots are in register whereby the element engages
(5) Upon release of the setting knob 28 the element 65 both slots keying them together and continued movement
23 comes into engagement with part 4 on the start track
25 under the action of the springs 14.
of the setting member moves both tracks away from the
clock driven member, a transmission having a part en
It will be seen that the cam 19 is a reversibly movable
gageable by the setting member upon reversal of its move
member which is constructed to actuate a part such as
for example the switch operating arm 20 which in a sense 70 ment, said transmission having a further part which,
upon actuation of the transmission, withdraws said ele
can be regarded as a follower. When the knob 28 and
ment transversely from the slots against the action of the
cam 19 are taken together in connection with track 12
spring means to a position opposite said notch and con
and pinion 17, the cam 19 may be regarded as an actuator
tinued reversal of movement of said setting member leaves
for acting on arm 20. In the same manner cam 19 may
be regarded as set to a desired position by-the rotation 75 said second track in its set position and moves said ?rst
track towards the clock driven member leaving it in its
set position.
4. A time controlled actuating mechanism as claimed
in claim 3 wherein the further part of said transmission
for withdrawing the element transversely from the slots
ment of the setting member, the carrier rotates moving
the element into said notch and setting said ?rst track.
5. -A time controlled actuating mechanism as set iorth
in vclaim 4, a second pinion ?xed to a spindle mounted
for ‘rotation on said carrier, a second set of teeth on said
comprises a rack to which the element is ?xed, a carrier
rack for engaging said second pinion, the axis of rotation
having a pinion mounted thereon, said rack being mount
ed on said carrier, said carrier being constructed to be
rotatable about an axis, said rack having a limited recipro
cal movement in said carrier, said rack having a set of 10
of said spindle being perpendicular to and intersecting
the axis of rotation of said carrier, said reversibly mov
teeth engaging said pinion mounted on the carrier so as
to rotate about the axis of rotation of the carrier, said
able means comprising a cam having a peripheral face
and ?xed to said spindle, a part to be actuated engaged
by said cam, said axis of rotation of said carrier passing
through the said peripheral face of said cam.
pinion being mounted to be rotated by the setting mem
ber upon said reversal of its movement whereby the track
and the element are Withdrawn against the action of said
spring means until the rack comes to one limit of its re
ciprocal movement whereafter, upon continued move
References Cited in the ?le of this patent
Honeywell __________ _._ Feb. 15, 1916
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