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Патент USA US3095825

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July 2, 1963
B. D. NABRESKI ETAL
3,095,816
SETBACK ACTUATED TIMING DEVICE
Filed Sept. 14. 1960
4 Sheets-Sheet l
INVENTOR.
BENJAMIN D. NABRESKI
BY
ALBERT L. STAUDTE
177. $2315, AJQ‘WMYVJW
ATTORNEYS:
July 2, 1963
B. D. NABRESKI ETAL
3,095,816
SETBACK ACTUATED TIMING DEVICE
Filed Sept. 14, 1960
4 Sheets-Sheet 2
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SETBACK ACTUATED TIMING DEVICE
Filed Sept. 14, 1960
4 Sheets-Sheet 3
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ATTORNEYS:
July 2, 1963
B. D. NABRESKI ETAL
3,095,315
SETBACK ACTUATED TIMING DEVICE
Filed Sept. 14, 1960
4 Sheets-Sheet 4
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BENJAMIN D.NABRESKI
ALBERT L. STAUDTE
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YX £44,124
ATTORNEYS:
United States Patent 0 ice
1
3,095,816
Patented July 2, 1963
2
vices (in the present embodiment a pair of switches)
3,695,816
SETBACK ACTUATED TIMING DEVICE
Benjamin D. Nahreski, Haddon Heights, N.J., and
Albert L. Staudte, Philadelphia, Pa, assignors to the
United States of America as represented by the Secre
tary oi the Army
Filed Sept. 14, 196%, Ser. No. 56,070
2 Claims. (Cl. 102-84)
(Granted under Title 35, US. Code (1952), see. 266)
which are controlled by the timer.
It includes a lever
31 which is pivoted to a support 32 by a pin 33, bears
at its free end a tab 34-, rests against a spring 35 and is
limited in its upper movement by a stop 36. Mounted
on the support 32 is a barrier 37 which is pivoted on a
rod 38 and has near one of its ends a pin 39. Near
its pivoted end, the lever 31 supports a barrier guard
40 which has a groove 41 arranged to receive the pin
As here
10 39 in a predetermined position of the lever 31.
The invention described herein may be manufactured
and used by or for the Government for governmental
purposes without the payment to us of any royalty there
on.
This invention relates to setback actuated timing de
vices which are utilized to produce certain e?iects in a
moving vehicle, such as a rocket, at a predetermined time
or times following the start of its deceleration.
In the use of some types of rockets, it is essential that
inafter explained, the barrier 37 is spring biased against
the barrier guard 40.
Mounted on the support 32 at the free end of the lever
31 is a rotor 42 which bears a pin 43 and a roller 44
and is coupled to a delay gear train 45 mounted between
supports 46 and 47. A rotor stop pin 48 is ?xed to the
support 46. The rocket is ?red in the direction indicated
by the arrow 49 '(see FIG. 4).
The acceleration produced by the ?ring of the rocket
the operation of certain mechanisms be initiated only 20 causes the lever 31 to- move downwardly compressing
the spring 35, exerting a pressure on the roller 44 and
after burnout and the beginning of deceleration, and that
turning the rotor 42 until it engages the rotor stop 48.
the end results of such operation be delayed by pre
determined time intervals. The present invention accom
lishes these results by a combination wherein a decelera
This runs the delay train 45 which tends to retard the
downward movement of the lever.
It also moves the
tion sensitive mechanism functions to initiate arming of 25 rotor pin 43 to a point which permits upward movement
of the lever tab 34.
a timer, after the vehicle begins to decelerate.
As the lever moves down, the barrier guard 40 also
The invention will be better understood from the fol
moves down so that it blocks the barrier pin 39 more
lowing description when considered in connection with
effectively, the relation between the pin 39 and the guard
the accompanying drawings and its scope is indicated by
30 49 being such that the barrier 37 is maintained in a
the appended claims.
vertical position until the groove 41 is alined with the
Referring to the drawings:
pin. The strength of the spring 35 is such that it will
FIG. 1 is an exterior view of the device,
FIG. 2 is a partial exploded view of the device,
FIG. 3 is a plan view of the deceleration sensitive
element which is located in the upper part of the lower
most unit of FIG. 2,
FIGS. 4, 5, and 6 are sections taken on the lines
4—4~, 5--5, and ‘6W6 of FIG. 3,
compress su?iciently to permit rotation of the rotor
from the weight gained by the lever during acceleration
of the rocket.
At burn-out, when deceleration of the rocket starts, the
compressed spring 35 pushes against the lever 31 forcing
it beyond the rotor pin 43. immediately prior to the
iFIGS. 7 and 8 are sectional views along lines 7——7 and
lever being halted by the stop 36, the groove 41 is alined
8—-—8 respectively of FIG. 2 and showing certain details 40 with the pin 39 allowing the pin to sweep through the
in the mechanical coupling between the deceleration
groove and releasing the barrier 37. Once the barrier
sensitive element and the timing element,
is released, further acceleration or deceleration of the
FIG. 9 is an exterior View or" the timing element shown
rocket, are of no consequence insofar as operation of
at the top of FIG. 2,
the device is concerned.
(FIG. 10 shows the timing element with certain of its
The barrier 37 is rotated about its pivot 38 by the
parts displaced from their normal positions in order to
force of the ?ring arm levers. This rotation of the bar
rier releases a pair of ?ring arms 51 and 52 (FIG. 7)
facilitate an understanding of its structure,
which are rotated by spring biased shafts 53 and 54‘ into
FIGS. 11, 12, 13 and 14 are sectional view taken on
engagement with the rim of the timing disk 55 (FIGS.
the lines 11—11, 12-12, ‘13-43 and 14-14 of FIG. 9,
50
and
2 and 10).
As indicated in FIGS. 13 and 14, the timer safety lever
FIGS. ‘15, 16 and 17 illustrate certain details of a pair
50 is pivoted about a pin 56, has an opening 57 for
of electrical switches which are located at the bottom
receiving the stop pin which is removed by setback and
of the lowermost unit of FIG. 2 and are released by the
has a pin 58 which is in engagement with an escapement
timing element to close at predetermined times after the
rocket has been ?red.
lever 53 (FIG. 14) when the safety lever is in its illus
trated locked position. When the locking pin is re
The device of FIG. 1 includes an upper housing 26, a
lower housing 21, a socket assembly 23 and a retaining
moved by setback, a spring ‘59 functions to sweep the
ring 22. The housing 29 is engraved circumferentially
pin 53 past the end of the escapement lever 59 and
with one-second \graduations from 10 through 100 sec
initiate operation of the timer movement.
Aside from the timing ‘disk 55 and safety lever 50, the
onds, every ?fth second being numbered. Arranged on 60
the lower housing is a Vernier which has ten 0.1 second
timer is of a conventional construction including a main
graduations on either side of a zero. A knob 24 has
spring 61 coupled to an escapement gear 62 through a
near the end of its shaft, a pinion which operates a gear
‘gear train which includes gear 63, pinion 64, gear 65,
25 (see FIG. 2) for adjusting the relation between these
pinion 66, gear 67, pinion 63, gear 69, pinion 70, gear 71
graduations and setting time into the device. A safety 65 and pinion 72. Associated with the escapement gear 62
pin 26 is arranged to lock the parts in their adjusted
in a well known manner are the escapement lever 59
positions. As shown more clearly in FIG. 2, the lower
previously mentioned and an escapement spring 73.
casing 21 is provided with viewing holes 27 and 28.
The timing disk 55 of FIGS. 2 and 10 has a rim in
The device as actually constructed weighed 3 pounds, was
which is a slot 75. The ?ring lever arms 51 and 52
70 have uprights 77 and 73 (FIG. 7) which ride on the
3.609 inches in diameter and 5.545 inches in length.
rim of the disk 55 after the barrier 37 is rotated from
The deceleration element 23 of FIGS. 3 to 6 is mount
its vertical position as previously explained. The main
ed in the unit 3% ‘of FIG. 2 above the operated de
3,095,816
3
spring 61 (FIG. 10) is always prewound. This is accom
a [barrier guard ?xed to said one end of said lever
the other in the mainspring housing. These pins prevent
and having a ‘groove curving outwardly from and
alined with said lever,
the arbor :from unwinding more than one full turn, thus
enabling it to operate in the ?at portion of the torque
a barrier pivoted to said support,
a barrier pin ?xed to said barrier, said barrier pin
plished by means of two pins, one in the arbor and
output curve of the spring.
being movable along the edge of said barrier guard
As the timer runs, the uprights 77 and 78 (FIG. 7)
of the ?ring arms 51 and 52 ride along the edge of the
timing disk 55 (FIGS. 2 and 110). When the upright 77
past the end of said ‘groove upon the movement of
is swung through the ‘slot 75 by a spring (not shown) a 10
said lever against the force exerted by said resilient
means and being movable along said edge and into
said igroove by said force, and
a ?ring arm biased into engagement with said barrier
and releasable therefrom upon movement of said
barrier pin into said groove.
notch 79 in its shaft 53‘ releases a switch arm 80 (FIG.
8). Similarly when the upright 78 is swung through
the slot 75, a notch 81 in the shaft 54 releases a switch
arm 82.
2. In a timing device, the combination of
The switch arm 8%] is ?xed to a shaft 83 (FIGS. 8 15
and 17) on which is mounted a member 84 bearing mov
able contacts 85 and 36. Fixed contacts 87 and 88 are
a support,
arranged to be engaged by the contacts 85 and 86 upon
rotation of the shaft 83'.
The switch arm 82 is ?xed to a shaft 89 (FIGS. 8 20
and 16) which is concentric with the shaft 83 and has
mounted upon it a switch member 9t) bearing movable
switch contacts 91 and 92. These contacts engage with
?xed contacts 93 and 94 upon switch closure.
The switch arms 36 and 82 are biased from their FIG. 25
8 positions by a spring 95 which functions to close the
switches successively in response to the successive release
of the switch arms from the shafts 53 and 54 as pre
viously explained.
a rotor journaled in said support and having ?xed
thereto a rotor pin and a roller which extend axially
therefrom and are angularly displaced from one
another about the rotational axis of said rotor,
a delay ‘gear train coupled to said rotor,
a lever having one end pivoted to said support and
having the other end located between said rotor pin
and said roller,
resilient means exerting a ‘force whereby said other
end of said lever is biased into engagement with said
rotor pin,
a barrier lguard ?xed to said one end ‘of said lever
and having a groove curving outwardly from and
alined with said lever,
The switch assembly includes two separate switches
each operating independently of the ‘other. The switches
a barrier pivoted to said support,
a barrier pin ?xed to said barrier, said barrier pin
are of the rotary knife-type, the contacts and all electrical
being movable along the edge of said barrier guard
conductors being ‘gold plated to insure non-corrosion.
Activated by the inner and outer shafts 83 and 89, both
switches are powered by the single spring 95.
35
From the foregoing description it follows that the de
past the end of said groove upon the movement
of said lever against the force exerted by said
vice of the present invention includes a deceleration
a ?ring arm biased into engagement vwith said barrier
and releasable therefrom upon the movement of
said barrier pin into said groove, said ?ring arm
sensitive device which permits arming so that electrical
circuits can be completed at successive time intervals fol
lowing the operation of the timer movement.
We claim:
1. In a timing device, the combination of
resilient means and being movable along said edge
and into said :groove by said ‘force,
40
a support,
a rotor jourualed in said support and having ?xed
thereto a rotor pin and a roller which extend axially
therefrom and are angularly displaced from one an
other about the rotational axis of said rotor,
a delay .gear train coupled to said rotor,
a lever having one end pivoted to said support and
having the other end located between said rotor pin 50
and said roller,
resilient means exerting a force whereby said other
end of said lever is "biased into engagement with
said rotor pin,
having an extension,
‘
a timer including a disk having an edge in engagement
with said extension and a slot in said edge into
which said extension is movable,
means operated by a setback force to initiate operation
of said timer, and
a load device releasable for operation upon said move
ment of said extension into said ‘groove.
References Cited in the ?le of this patent
vUNITED STATES PATENTS
2,593,775‘
2,928,347
MacLean ____________ .._ Apr. 22, 1952
McLean ____________ __ Mar. 15, 1960
2,958,282
Czajlcowski et al. __-_____ Nov. 1, 1960
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